Formulation and in-vitro Evaluation of Vildagliptin Microspheres Using Pectin and Xanthan Gum as Polymers

Formulation and in-vitro Evaluation of Vildagliptin Microspheres Using Pectin and Xanthan Gum as Polymers | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Formulation and in-vitro Evaluation of Vildagliptin Microspheres Using Pectin and Xanthan Gum as Polymers KRISHNAVENI MANUBOLU, RAVEESHA PEERIGA, KUDIPUDI HARINADHA BABA, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3917925/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Aim The aim of the work is a formulation and in vitro evaluation of the vildagliptin microsphere using pectin and xanthan gum. Objective Vildagliptin is a dipeptidyl peptidase-4 (DPP-4) inhibitor extensively associated with the therapy of type-2 diabetes mellitus. A controlled release of the drug in the gastrointestinal tract may aid in maintaining the therapeutic range for an extended period. Sodium alginate, pectin, and xanthan gum are commonly used as biopolymers in drug delivery with favourable biocompatibility and biodegradation. Materials and method Sodium alginate-pectin and sodium alginate-xanthan gum beads were developed to deliver vildagliptin. A calcium chloride ion (cacl2) induced ionic gelation technique was employed for synthesizing pH-sensitive beads by varying the ratio of sodium alginate, pectin, and xanthan gum. Results The FTIR investigation verified that drugs and polymers are compatible. The developed beads were evaluated for scanning electron microscopic and DSC study, drug content, swelling ratio, and in-vitro dissolution study. The microscopic images exhibited some are in spherical and semi-spherical shaped beads with cracked and rough surfaces. A pH-dependent swelling was seen, indicating that water intake was restricted in an acidic medium and elevated in an alkaline pH environment. The in-vitro dissolution study demonstrated a controlled release of the drug. optimized formulation Exhibiting diffusion release. Conclusion The study reported the successful development of vildagliptin microspheres by using sodium alginate, pectin, and xanthan beads for controlled delivery of Vildagliptin. Biopolymers Drug Delivery vildagliptin calcium chloride ion sodium alginate Pectin and xanthan Gum pH-sensitive bead Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 INTRODUCTION Patients previously used conventional dosage forms such as tablets and capsules to treat acute and chronic disorders, however, these conventional dosage forms required many doses each day to maintain peak plasma level concentration. To solve these issues, contemporary and sophisticated techniques known as controlled drug delivery systems (CDDS) are being developed. The main purpose of a Controlled drug delivery system is to ensure optimum plasma drug concentration, thus enhancing efficacy, safety, and bioavailability of drug with improved patient compliance. Microspheres are carrier drug delivery systems, Microspheres are spherical, free-flowing, [ 1 ] and which are biodegradable or non-biodegradable in nature and have a particle size of 1 µm to 1000 µm. This is an important approach in delivering therapeutic substance to the target site with specificity if modified, and to maintain the desired concentration at the site of interest. Controlled drug delivery can be achieved using microspheres [ 2 ] . Sodium alginate is soluble in water and forms a reticulated structure which can be cross-linked with divalent or polyvalent cations to form insoluble meshwork. Calcium and zinc cations have been reported for cross-linking of acid groups of alginates. Pectin is a natural polymer with many applications due to its physicochemical parameters and biodegradability [ 3 ] . It is registered in the US Food and Drug Administration (FDA) as an additive with no daily consumption limits and thus can be widely used as an excipient in the formulation of matrix tablets, gels, pharmaceutical coatings, etc. [ 4 ] . Xanthan gum (XG) is a high molecular weight, an anionic extracellular polysaccharide that is produced by the gram-negative bacterium Xanthomonas campestris . It is widely used in food, cosmetics, and pharmaceuticals because of its encouraging reports on safety [ 5 ] It facilitates water retention and produces highly viscous solutions even at low concentrations. Furthermore, it was recently reported that xanthan gum has a potential blood-sugar-lowering and stabilizing effect. This last particular property makes xanthan gum an excellent candidate for the administration of active antidiabetic substances [ 6 , 7 ] . Given that natural polymers are safe, biocompatible, and biodegradable, their contribution to the formulation of dosage forms is noteworthy. [ 21 , 22 ] Vildagliptin is a novel dual-type dipeptidyl peptidase-4 (DPP 4) inhibitor, that efficiently regulates endocrine levels in both hypoglycaemia and hyperglycaemia and can be used both as monotherapy and in grouping treatment for the cure of type 2 diabetes mellitus (T2DM) [ 8 ] . VLG is not efficient in providing control over drug delivery with usual oral dosage forms because of the short elimination half-life of 1.6 to 2.5 hand rapid metabolism, causing significant variations of drug levels in plasma. It is suggested that patients having (T2DM) should conform precisely to the dosing time and that vildagliptin should be taken twice daily 50 mg dose [ 9 , 10 ] . In this present study, a microsphere of vildagliptin was prepared with an optimum concentration of all ingredients and pectin, xanthan gum was used as a matrix-building material in combination with sodium alginate to provide a controlled and prolonged release. MATERIALS AND METHODS Materials Vildagliptin (AET Lab Pvt Ltd), Pectin, Calcium chloride, Potassium dihydrogen phosphate (SDFCL (SD of fine-chem Ltd., Mumbai) Xanthan gum, sodium dihydrogen orthophosphate, Hydrochloric acid (NICE Chemicals (P) Ltd). Preformulation studies Determination of λmax The 10mg drug was weighed and taken in a volumetric flask, dissolved in 10 ml phosphate buffer.1ml sample was withdrawn and made up with 100ml of phosphate buffer to get a 10µg/ml concentration.10µg/ml concentration was scanned by using a double beam U V-visible spectrophotometer in the wavelength range from 200 to 400nm. Preparation of standard calibration curve [ 11 ] 10mg drug was weighed and taken in a volumetric flask, dissolved in 10 m1 of phosphate buffer considered as stock-1, and 1ml of stock-1 solution can be withdrawn and made up with 100ml of phosphate buffer in a volumetric flask and considered as a stock 2 solution. Dilutions were prepared by using phosphate buffer in the range of 1µg-10µg concentration and absorbance was noted in the 210nm wavelength, A calibration curve was prepared by plotting the absorbance against the concentration. Fourier transform infrared spectroscopy (FTIR) study [ 11 ] The FTIR is a technique used to obtain an infrared spectrum of absorption of target material, that can be used to identify the functional groups and molecular structure. Pure vildagliptin and vildagliptin with a mixture of polymer FTIR spectra were recorded. The required quantity of KBR and vildagliptin and vildagliptin with polymer was mixed. Under hydraulic pressure of 600 kg, the disk was created using approximately 100 mg of the mixture. Then the FTIR spectra were recorded between 4000 and 400 cm − 1 . METHODOLOGY Preparation of vildagliptin microspheres using pectin and xanthan gum, The modified method (composition) is taken from Sreejan Manna et al [ 17 ] , and the cacl 2 is used as a cross-linker and the parameters, such as the drying process and stirring speed, differ from it ( Sreejan Manna et al). Preparation of sodium alginate-pectin microsphere Sodium alginate-pectin microspheres were prepared by using the ionotropic gelation method, Sodium alginate, and pectin were weighed the accurate amount according to the composition, and dissolved in 25 ml of distilled water with continued stirring and add the vildagliptin drug into it and stirred for 30 mins with high rotational speed using a mechanical stirrer. Drug-polymer mixture was added dropwise into a cacl 2 solution and provided 30 mins for hardening, filtered it and placed for air drying. Different concentrations (F1, F2, F3, F4, F5, F6, F7) of microspheres are prepared according to the composition table no 1. Preparation of sodium alginate-xanthan gum microsphere Sodium alginate-xanthan gum microspheres were prepared by using the ionotropic gelation method, Sodium alginate, and pectin were weighed the accurate amounts according to the composition, and dissolved in 25 ml of distilled water with continuous stirring, and add the vildagliptin drug into it and stirred for 30 mins with high rotational speed using a mechanical stirrer. Drug-polymer mixture was added dropwise into a cacl 2 solution and provided 30 mins for hardening, filtered it and placed for air drying. Different concentrations (X1, X2, X3, X4, X5, X6) of microspheres are prepared according to the composition table no 2. EVALUATION PARAMETERS OF MICROSPHERES Viscosity The viscosity of solutions at various concentrations was measured by using a Brookfield viscometer. The tests were performed at room temperature with different spindles s64 and s61 and a 100-rpm shear rate. Physical appearance All the prepared microspheres were observed visually for colour and uniformity size. Percentage yield (%) The prepared microspheres were weighed by using a weighing balance. weight microspheres were divided by the entire amount of drug and polymer used in the preparation of microspheres [ 12 ] . $$\mathbf{p}\mathbf{e}\mathbf{r}\mathbf{c}\mathbf{e}\mathbf{n}\mathbf{t}\mathbf{a}\mathbf{g}\mathbf{e} \mathbf{y}\mathbf{i}\mathbf{e}\mathbf{l}\mathbf{d}\left(\mathbf{\%}\right)=\frac{\mathbf{p}\mathbf{r}\mathbf{a}\mathbf{t}\mathbf{i}\mathbf{c}\mathbf{a}\mathbf{l} \mathbf{y}\mathbf{i}\mathbf{e}\mathbf{l}\mathbf{d}}{\mathbf{t}\mathbf{h}\mathbf{e}\mathbf{o}\mathbf{r}\mathbf{t}\mathbf{i}\mathbf{c}\mathbf{a}\mathbf{l} \mathbf{y}\mathbf{i}\mathbf{e}\mathbf{l}\mathbf{d}} \times 100$$ Flow properties Angle of repose The flow characteristics are measured by the angle of repose. The angle of repose was determined by using the funnel method. In this method, a funnel was secured with its tip at a 1cm height above the paper that was placed on a flat horizontal surface. Microspheres were carefully poured through the funnel until the apex of the conical pile just touched the tip of the funnel. Measure the height of the heap pile and the radius of the base with a ruler. The angle of repose was determined by using the equation [ 13 ] . $$\mathbf{t}\mathbf{a}\mathbf{n}\varvec{\theta }= \frac{\mathbf{h}}{\mathbf{r}}$$ Where, h = height of the file R = radius of the base of the pile Ø = angle of repose Bulk density and tapped density: Accurately weighed 1g of microspheres are poured into a 10ml measuring cylinder and the initial volume was observed and volume is noted and the cylinder was tapped continuously up to 100 times and noted the tapped volume.it is expressed in gm/ml and calculated by using the given formula [ 14 ] . $$\mathbf{B}\mathbf{D}= \frac{\mathbf{W}\mathbf{e}\mathbf{i}\mathbf{g}\mathbf{h}\mathbf{t} \mathbf{o}\mathbf{f} \mathbf{t}\mathbf{h}\mathbf{e} \mathbf{p}\mathbf{o}\mathbf{w}\mathbf{d}\mathbf{e}\mathbf{r}}{\mathbf{I}\mathbf{n}\mathbf{i}\mathbf{t}\mathbf{i}\mathbf{a}\mathbf{l} \mathbf{v}\mathbf{o}\mathbf{l}\mathbf{u}\mathbf{m}\mathbf{e} } \mathbf{T}\mathbf{D}= \frac{\mathbf{W}\mathbf{e}\mathbf{i}\mathbf{g}\mathbf{h}\mathbf{t} \mathbf{o}\mathbf{f} \mathbf{t}\mathbf{h}\mathbf{e} \mathbf{p}\mathbf{o}\mathbf{w}\mathbf{d}\mathbf{e}\mathbf{r}}{\mathbf{T}\mathbf{a}\mathbf{p}\mathbf{p}\mathbf{e}\mathbf{d} \mathbf{v}\mathbf{o}\mathbf{l}\mathbf{u}\mathbf{m}\mathbf{e} }$$ Carr’s index The compressibility of the granules is determined by Carr’s compressibility index.it is indirectly related to the relative flow rate cohesiveness. it was calculated by using the results of bulk density and tapped density. Calculated by using the given formula [ 15 ] . $$\mathbf{C}\mathbf{a}\mathbf{r}{\mathbf{r}}^{\mathbf{{\prime }}}\mathbf{s} \mathbf{i}\mathbf{n}\mathbf{d}\mathbf{e}\mathbf{x} \left(\mathbf{\%}\right)= \frac{\mathbf{T}\mathbf{D}-\mathbf{B}\mathbf{D}}{\mathbf{T}\mathbf{D}} \times 100$$ Hausner’s ratio Hausner’s ratio was related to interparticle friction. It was also calculated by using the results of bulk density and tapped density [ 16 ] . $${\mathbf{H}\mathbf{a}\mathbf{u}\mathbf{s}\mathbf{n}\mathbf{e}\mathbf{r}}^{\mathbf{{\prime }}}\mathbf{s} \mathbf{r}\mathbf{a}\mathbf{t}\mathbf{i}\mathbf{o}= \frac{\mathbf{T}\mathbf{D}}{\mathbf{B}\mathbf{D}}$$ Particle size analysis Particle sizes of microspheres were determined by optical microscopy. The optical microscope was fitted with an eyepiece micrometer which was then calibrated with a stage microm eter. About 100 microspheres were randomly selected from each formulation and then the average size was calculated. Swelling index Weighed the beads 0.1g and placed them into 100ml of PH 1.2 Hcl buffer and followed by a PH 6.8 phosphate buffer solution and allow them to stand for 2 hours and then filtered the solution and weighed the microspheres and calculated by using the equation [ 17 ] . $$\mathbf{s}\mathbf{w}\mathbf{e}\mathbf{l}\mathbf{l}\mathbf{i}\mathbf{n}\mathbf{g} \mathbf{i}\mathbf{n}\mathbf{d}\mathbf{e}\mathbf{x}=\frac{\mathbf{f}\mathbf{i}\mathbf{n}\mathbf{a}\mathbf{l} \mathbf{w}\mathbf{e}\mathbf{i}\mathbf{g}\mathbf{h}\mathbf{t}-\mathbf{i}\mathbf{n}\mathbf{i}\mathbf{t}\mathbf{i}\mathbf{a}\mathbf{l} \mathbf{w}\mathbf{e}\mathbf{i}\mathbf{g}\mathbf{h}\mathbf{t} }{\mathbf{i}\mathbf{n}\mathbf{i}\mathbf{t}\mathbf{i}\mathbf{a}\mathbf{l} \mathbf{w}\mathbf{e}\mathbf{i}\mathbf{g}\mathbf{h}\mathbf{t}}\times 100$$ Drug content Weighed the beads equivalent to 50mg 0f the drug, crushed them and mixed them with prepared 100 ml of phosphate buffer with 6.8PH and left them aside for 24 hours. After 24 hours the solution was filtered. The filtrate was subjected to suitable dilution. The filtrate was analyzed by using a UV-visible spectrophotometer at 210 nm [ 18 ] . Invitro drug release To determine the amount of drug released over a period. To identify the drug release in stomach and in the intestine, this is carried out in 0.1N HCL (PH-1.2) and phosphate buffer (PH-6.8), using a USP type II dissolution apparatus (rotating paddle). Accurately weighed 100mg beads and placed them into a dissolution media containing 900ml of 0.1N HCL (PH-1.2) buffer solution for 2 hours at a controlled temperature of 37 degrees. The speed of rotation was fixed at 100 rpm. At the prefixed time intervals, samples are withdrawn and analysed, and replaced with the same volume in it. After 2 hours the beads in an acidic medium were subjected to filtration and collected then subjected to further dissolution in phosphate buffer solution (PH-6.8). at the prefixed time interval sample was withdrawn and replaced same volume buffer. The solution was subjected to dilution and analysed by using a UV-visible spectrophotometer at 210nm [ 19 ] . Mechanism of Release Kinetics Drug release mechanisms and kinetics are two characteristics of the dosage forms that play an essential role in describing drug dissolution profiles from a dosage form and hence understanding they’re in-vivo performance. The dissolution data obtained are fitted to various kinetic equations such as zero-order, first-order, Higuchi, Hixson-Crowell, and Korsmeyer-Peppas, and find the R 2 values of the release profile corresponding to each model. Scanning electron microscope (SEM) Scanning Electron Microscope was used to determine the Surface nature of microspheres. The microspheres were dried completely before examination and SEM was done at different magnifications [ 20 ] . Differential scanning calorimetry (DSC) The pure drug, and optimized formulation, were subjected to DSC studies by using a differential scanning calorimeter equipped with a computer analyzer. Each sample weighing 1 mg was placed into standard aluminium pans and sealed, and a bare aluminium pan was used as a reference, The Scan was carried out at a heating rate of 10 o C / min under a nitrogen atmosphere over a temperature range of 300C-3000 o C [ 20 ] . Stability studies The Stability of a pharmaceutical product may be defined as the capability of a particular formulation in a specific container/closure system to remain within its physical, chemical, microbiological, therapeutic, and toxicological specifications. The stability of all the formulations was carried out at different temperatures as per ICH guidelines. In the present study, stability studies were carried out for a specific time period of up to 90 days for selected formulations at 40ºC ± 20ºC/75%±5% RH in a humidity control oven. The formulations were packed in butter paper, followed by aluminium foil. After 3 months, the selected formulations were analyzed for their physical parameters like appearances, flow properties, swelling index, and performance parameters like drug content uniformity, and Invitro dissolution study. Statistical analysis Experimental data were expressed as the mean value ± S.D. Statistical analysis was performed using the normality test and one-way analysis of variance (ANOVA) test using a graph pad prism (version 5, GraphPad Software, San Diego, California, USA). Differences were considered to be statistically significant when p < 0.05 for ANOVA and while normality test is well accepted for the above formulations at a level of significance of 5 percent. RESULTS AND DISCUSSION Preformulation studies Absorbance maxima The sample was prepared with a phosphate buffer. Using a spectrophotometer, the maximum absorbance of the sample was measured, the vildagliptin spectrum gave the highest peak at 210 nm. indicating the wavelength where it absorbs light most strongly fig no 1. Standard Calibration Curve From the Standard Calibration Curve vildagliptin, it was observed that the drug obeys Beer’s law in the concentration range of 1–10 µg/ml in Phosphate Buffer (PH6.8) and shows linearity (R 2 = 0.9902). The linear Regression equation generated was used for the calculation of the amount of drug. Fig no:2 Fourier-transform infrared spectroscopy (FTIR) FT-IR spectra of vildagliptin and vildagliptin with Polymers are shown in Figs. 3, 4, and 5. Pure vildagliptin showed principal absorption peaks at 735.67 cm − 1 (C-H Bending), 1034.69 cm − 1 (C = O stretching), 1399.5 cm − 1 cm-1 (-NO 2 bending)1651.73cm − 1 (> C = C C = C < stretching and C-H stretching vibrations were also noticed in the spectra of the drug with polymers. FT-IR spectra revealed that there was no interaction between the drug and the polymer used for formulations. Viscosity The viscosity of sodium alginate-pectin microspheres ranged from 150 to 40.25 and viscosity gradually decreased. the viscosity of sodium alginate-xanthan gum microspheres ranges from 180 to 864, viscosity gradually increased due to xanthan gum. The data shown in table 3 Percentage yield The percentage yield of sodium alginate-pectin microspheres ranged from 89 to 97%. and the percentage yield of sodium alginate-xanthan gum microspheres ranged from 87 to 95%. Values are shown in table 3 Flow properties Vildagliptin microspheres show excellent flow properties. The bulk density of all formulations was found to be in the range of 0.77 to 0.55gm/ml, whereas the tapped density was observed between 0.84 to 0.583 gm/ml. From the values of bulk density and tapped density, the values for the compressibility index and Hausner’s ratio were calculated. The values for compressibility index were found between 5.17 to14.2%. The values for Hausner’s ratio were found in between 1.04 to 1.16. All these values are within the specified limit which indicates good flow properties. The angle of repose was found to be less than 20 which indicates good flow. Overall, these values indicate good flow properties. The results is given in below table 4. Particle size analysis The particle size of vildagliptin-loaded microspheres ranges found to be 1671 to 1530µm. and the highest particle size is F7 and lowest is F5 in pectin microspheres. The highest particle size is X4 and the lowest is X2 in xanthan gum microspheres. Values are shown in table 5 Swelling index Microspheres in phosphate buffer show a high swelling rate showed in table no 5 Compared to acidic buffer. among all formulations F6, and F7 showing are high swelling rates. The data shown in table. 5 Drug content F1 and F3 formulations show high drug content when compare with other formulations. Result is shown in table 5 Comparative dissolution profile of pectin- vildagliptin microspheres Comparison of invitro drug release of all microsphere’s formulations prepared using sodium alginate-pectin are shown in table no 6 fig no:6 F3 formulation shows the highest amount of drug release of 98.6% when compared to other formulations. Comparative dissolution profile of xanthan gum-vildagliptin microspheres Comparison of invitro drug release of all microsphere’s formulations prepared using sodium alginate-xanthan gum are shown in table no 7 Fig no 7.X4 and X6 formulation shows the highest amount of drug release of 97.1% and 98.42% when compared to other formulations. Statistical analysis The formulated vildagliptin microspheres by using pectin and xanthan gum were subjected to one-way ANOVA and normality tests using Graph pad prism. The statistical analysis of one-way ANOVA produces a p-value that tends to be < 0.0001. At the same time, the normality test is well accepted for all formulations at a significance level of < 0.05%. Selection of Optimized Formulation Based on the above results, the two preparations have the two best formulations (F3 and X6), and when comparing the results obtained from various evaluation parameters of the two formulations i.e., percentage yield (91% and 95%), particle size (1590µm and 1615µm), swelling index (1400 and 1620), drug content (31mg and 4.01mg), and drug release (98.6 and 98.4). from this data of two formulations, F3 has good particle size, high drug content, and in-vitro drug release, so, F3 is considered the optimized formulation. Then SEM and DSC were also performed for the optimized formulation to determine the size, and melting point and confirm its functional structure. stability study and a comparative study was done for the optimized formulation. Drug Release Kinetic Studies The release data were fitted to zero order, first order, Korsmeyer-peppas model and Higuchi equation to know the mechanism of drug release from the microspheres and drug release mechanism of optimized formulation (F3) is a tablet no 8, fig no 8 The release profile of the optimized formulation F3, following zero order and Higuchi kinetic model. Scanning Electron Microscopy (SEM) Optimized formulation is subjected for Scanning electron microscopy, the microspheres appear spherical and hemispherical/ semi spherical in shape observed in fig no. 9 and with diameters ranging from 1.59mm or 1590µm to 1.66mm or 1660µm fig no 9. The surface of the microsphere was demonstrated as rough in one and smooth in the other observed in fig no 9(a) and cracks or fractures emerging on the surface might be caused by external temperature and stress conditions affecting the microspheres. Differential Scanning Calorimetry (DSC) Differential scanning calorimetry (DSC) studies were performed for the optimized formulation and drug sample, fig no: 10 DSC of the drug showed a sharp peak at158.88ºC. fig no:11 DSC of optimized formulation of microspheres showing a board peak from 192.43ºC to 222.09ºC and a peak at 196.49ºC, at 302.85°C an exothermic peak was observed such a phenomenon is called cold crystallization. Comparative study A comparison study was conducted between the optimized formulation (F3) and the marketed formulation of Vildagliptin tablets (Galvas® (50mg); Norvartis). Data comparisons for these two formulations the optimized formulation (x6) showing better control than the marketed formulation. Drug release of marketed formulation took 2 hours to reach 99.41% and optimized formulation take 8 hours to reach 98.6%. the optimized formulation showing better controlled release and taking long time to release (8 hrs.) than the marketed formulation. table no 9 Stability studies Stability studies of the prepared microspheres were carried out by storing optimized formulation (F3) at room temperature humidity and 40ºC ± 2ºC/75% RH ± 5% RH in a humidity control oven for ninety days. Stability studies were carried out to predict the degradation that may occur over a prolonged storage period with different temperatures and humidities. Results were decreased when compared with fresh microspheres and results was tableted 10 below. Inference : Other evaluation parameters as also done, such as flow properties (bulk density, tapped density, Carr’s index, and Hauser’s ratio) particle size, and swelling index there is no significant difference in values. CONCLUSION The present study has been a satisfactory attempt to formulate microspheres of Vildagliptin, an oral administration of microspheres used to treat type 2 diabetes mellitus. The therapeutic range may be maintained with a controlled release of the medication in the gastrointestinal tract. An ionotropic gelation technique was employed to synthesize both sodium alginate-pectin and sodium alginate-xanthan gum vildagliptin-loaded microspheres. FTIR study confirmed the no drug-polymer interactions. Particle size ranges from 1530µm to 1679µm. The swelling study performed in acidic and alkaline media revealed a good release in alkaline solution PH-6.8 in beads. The in vitro drug release experimental study had succeeded based on the ratio of beads, although all microspheres exhibited satisfactory results, the best results were obtained with optimized formulation F3 of sodium alginate-pectin. Based on exponent values it shows diffusion release. Performed the SEM and DSC for optimized formulation. when compared with the marketed formulation of vildagliptin tablets (galvus® 50mg) with vildagliptin microspheres are shows greater controlled release than the marketed formulation. stability studies were conducted for optimized formulation for 90 days, there are no significant changes. The above study concluded that formulated microspheres of vildagliptin would be more efficacious and acceptable than conventional drug delivery of vildagliptin and have a satisfactorily controlled release profile, which may provide increased therapeutic efficacy, decrease dosing frequency, and improves patient compliance. Future scope Further the formulations may be suggested for the in-vivo bioavailability studies and in-vivo in-vitro correlation studies are to be done to establish the efficacy of these formulations. Declarations ACKNOWLEDGEMENT I would like to thank management of Narayana pharmacy college, Nellore for their support during this research work. I am thankful to D. Harinarayana, CEO of NISHKA Research Pvt, Ltd., Hyderabad and RV labs, Guntur for their analytical study help in this research work. Funding Support The authors declare that they have no funding support for this study. Conflict of Interest The authors declare that they have no conflict of interest for this study References Deshmukh PP, Barhate AN. Formulation and evaluation of microspheres of Glibenclamide by inotropic gelation method. Indo-American Journal of Pharmaceutical Research. 2017;7(9). Mane S. Effect of formulation variables on the characteristics of vildagliptin microspheres. IP International Journal of Comprehensive and Advanced. 2022 Jul; 3(1): 134-140. May CD. Industrial pectins: Sources, production and applications. Carbohydrate polymers. 1990 Jan 1;12(1):79-99. 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Sci., 2021, 12(3), 1870-1878. Manubolu K, Munna S, Bonnoth CK, Mohan GR. Design and Optimization of Floating Microspheres Using Natural Polymer.(2021). Int. J. Life Sci. Pharma Res.;11(1):166-83. Tables Table no 1: Composition of sodium alginate-pectin microspheres SL. No Formulation Sodium alginate (mg) Pectin (mg) Drug(mg) Crosslinker (calcium chloride) 1 F1 900 100 50mg 2.5% 2 F2 800 200 50 mg 2.5% 3 F3 700 300 50mg 2.5% 4 F4 600 400 50mg 2.5% 5 F5 500 500 50mg 2.5% 6 F6 400 600 50mg 2.5% 7 F7 250 750 50mg 2.5% Table no 2: Composition of sodium alginate-xanthan gum microspheres SL. No Formulation Sodium alginate(mg) Xanthan gum(mg) Drug(mg) Crosslinker (calcium chloride) 1 X1 900 100 50mg 2.5% 2 X2 850 150 50 mg 2.5% 3 X3 800 200 50mg 2.5% 4 X4 750 250 50mg 2.5% 5 X5 700 300 50mg 2.5% 6 X6 650 350 50mg 2.5% Table no. 3: Viscosity, % yield, and appearances of sodium alginate-pectin microspheres S. No Formulation Viscosity (Cp) Percentage yield (%) Appearances of beads 1 F1 150 89 Goldish brown, Spherical 2 F2 134 90 olive green, Spherical 3 F3 109 91 olive green, Spherical 4 F4 80 97 Sand brown, Spherical 5 F5 67 94 Sand brown, Spherical 6 F6 52.3 95 Brown, Spherical 7 F7 40.25 96 Brown, Spherical, oval 8 X1 180 88 Pale white, Spherical 9 X2 276 93 Pale white, Spherical 10 X3 368 87 Pale white, Spherical 11 X4 521 93 Pale white, Spherical 12 X5 690 94 Pale white, Spherical 13 X6 864 95 Pale white, Spherical Table no. 4 : Flow properties of vildagliptin microspheres Formulation Angle of repose(º) Bulk density (g/ml) Tapped density(g/ml) Carr’s index Hausner’s ratio F1 10.30 ± 0.1 0.73636 ± 0.04 0.81 ± 0.04 9.8 1.109 F2 5.19 ± 0.54 0.7769 ± 0.03 0.8416 ± 0.02 8.3 1.09 F3 14.91 ± 0.2 0.74 ± 0.07 0.7928 ± 0.01 6.3 1.06 F4 13.49 ± 0.4 0.706 ± 0.02 0.74 ± 0.06 5.8 1.04 F5 17.74 ± 0.4 0.715 ± 0.05 0.775 ± 0.05 7.7 1.08 F6 9.4 ± 0.3 0.64705 ± 0.07 0.7333 ± 0.02 12.3 1.14 F7 17.74 ± 0.1 0.55 ± 0.01 0.5833 ± 0.07 5.17 1.05 X1 14.03 ± 0.09 0.5857 ± 0.04 0.6833 ± 0.02 10 1.16 X2 15.16 ± 0.1 0.5863 ± 0.07 0.645 ± 0.01 9.51 1.10 X3 17.35 ± 0.4 0.5857 ± 0.09 0.6473 ± 0.06 10 1.105 X4 11.30 ± 0.07 0.635 ± 0.01 0.7055 ± 0.02 14.28 1.11 X5 14.83 ± 0.5 0.5952 ± 0.03 0.6944 ± 0.04 14.2 1.16 X6 14.89 ± 0.2 0.6047 ± 0.02 0.7055 ± 0.05 14.28 1.16 Table no. 5: Swelling index of pectin-vildagliptin microspheres SL.NO Formulation Mean particle size (µm) Swelling index of microspheres in phosphate buffer Swelling index of microspheres in acidic (Hcl) buffer Drug content (mgs) 1 F1 1619 1520 ± 1.01 210 ± 0.7 47.7 ± 0.10 2 F2 1665 1310 ± 0.9 160 ± 0.3 16.03 ± 0.04 3 F3 1590 1400 ± 0.4 160 ± 0.5 31 ± 0.06 4 F4 1561 1330 ± 0.3 200 ± 0.8 13 ± 0.02 5 F5 1552 1410 ± 1.0 210 ± 0.3 20.8 ± 0.06 6 F6 1622 1680 ± 0.6 320 ± 0.2 5.7 ± 0.02 7 F7 1641 2120 ± 1.21 700 ± 0.9 13.6 ± 0.4 8 X1 1579 1250 ± 1.07 100 ± 0.97 5.6 ± 0.09 9 X2 1530 1200 ± 1.6 50 ± 0.3 5.3 ± 0.10 10 X3 1583 1330 ± 1.2 170 ± 0.9 3.9 ± 0.08 11 X4 1671 1260 ± 0.98 140 ± 0.81 3.9 ± 0.08 12 X5 1602 1590 ± 1.1 190 ± 0.8 4.0 ± 0.02 13 X6 1615 1620 ± 1.02 220 ± 1.2 4.01 ± 0.02 Table no. 6: Comparative dissolution profile of pectin vildagliptin microspheres Time in hrs. F1 F2 F3 F4 F5 F6 F7 0 0 0 0 0 0 0 0 0.5 1.4 ± 0.10 12.1 ± 0.02 5.4 ± 0.04 16.7 ± 0.10 18 ± 0.02 3.6 ± 0.02 6.3 ± 0.03 1 15.1 ± 0.04 21.8 ± 0.03 12.5 ± 0.03 20.8 ± 0.12 21.3 ± 0.03 11.4 ± 0.04 18.6 ± 0.04 2 26.7 ± 0.06 24.6 ± 0.02 15.4 ± 0.06 39.2 ± 0.03 47.3 ± 0.03 13.3 ± 0.06 27.8 ± 0.1 3 30.3 ± 0.08 43.6 ± 0.04 23.4 ± 0.04 40.9 ± 0.08 52 ± 0.02 29.4 ± 0.06 33.7 ± 0.08 4 45.8 ± 0.06 52.9 ± 0.02 35.0 ± 0.02 43.8 ± 0.06 60 ± 0.04 30.2 ± 0.02 38.9 ± 0.02 5 57 ± 0.08 59.3 ± 0.05 45.6 ± 0.05 65.1 ± 0.12 68.1 ± 0.08 52.3 ± 0.03 53.6 ± 0.07 6 64.8 ± 0.09 75.3 ± 0.01 73.7 ± 0.10 74.7 ± 0.03 81 ± 0.05 63. ±0.08 67.5 ± 0.02 7 73.9 ± 0.01 82 ± 0.04 83.4 ± 0.09 81.6 ± 0.09 94.7 ± 0.02 76.2 ± 0.01 81.4 ± 0.02 8 90.1 ± 0.08 95.2 ± 0.02 98.6 ± 0.03 93.7 ± 0.08 96.9 ± 0.04 91.5 ± 0.09 90 ± 0.03 Table no. 7: Comparative dissolution profile of vildagliptin xanthan gum microspheres Time in hrs. X1 X2 X3 X4 X5 X6 0 0 0 0 0 0 0 0.5 4.7 ± 0.01 8.4 ± 0.04 12.57 ± 0.03 11.68 ± 0.02 18.06 ± 0.04 15.89 ± 0.02 1 9.51 ± 0.02 12.2 ± 0.01 22.97 ± 0.04 12.57 ± 0.01 22.75 ± 0.03 18.32 ± 0.04 2 17.4 ± 0.03 15.1 ± 0.01 34.92 ± 0.05 18.76 ± 0.01 30.51 ± 0.04 27.17 ± 0.03 3 25.8 ± 0.02 30.8 ± 0.05 40.01 ± 0.02 29.39 ± 0.02 36.69 ± 0.02 31.16 ± 0.06 4 36.02 ± 0.02 42.8 ± 0.04 59.05 ± 0.03 42.45 ± 0.03 48.42 ± 0.05 38.02 ± 0.04 5 44.9 ± 0.01 51.9 ± 0.01 67.9 ± 0.01 54.4 ± 0.03 57.9 ± 0.06 52.41 ± 0.02 6 47.6 ± 0.03 67.4 ± 0.03 74.54 ± 0.01 76.53 ± 0.01 78.97 ± 0.02 78.97 ± 0.06 7 59 ± 0.03 74.1 ± 0.01 80.96 ± 0.04 87.6 ± 0.02 81.18 ± 0.03 85.61 ± 0.05 8 65.1 ± 0.02 79.3 ± 0.05 86.1 ± 0.01 97.1 ± 0.02 96.67 ± 0.02 98.42 ± 0.02 Table no. 8: Release Kinetics Formulation zero order First-order kinetics Higuchi release model Hixson Crowell Korsmeyer Peppas F3 0.9808 0.3695 0.8994 0.8844 0.8318 Table no.9: Comparison study of optimized formulation with a marketed formulation Time (hrs) Marketed formulation (galvus® ) Optimized formulation (F3) 0 0 0 0.1 28.41 0 0.5 63.2 5.4 1 90.57 12.5 2 99.41 15.4 3 23.4 4 35.04 5 45.6 6 73.7 7 83.4 8 98.6 Table no.10 : Stability studies of optimized pectin formulation Storage condition Days Drug content (mgs) %Drug release Room temperature 30 31 98.4 60 31 98.4 90 31 98.3 At40ºC AND 75% RH 30 31 98 60 30.9 97.1 90 30 97.1 Additional Declarations The authors declare no competing interests. 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spectrum of vildagliptin with xanthan gum\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"5.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/7a68ef4ef0db1096e2f2045e.jpg"},{"id":50575371,"identity":"96ce804f-752d-4f08-beea-e161a08fb9c3","added_by":"auto","created_at":"2024-02-02 17:25:37","extension":"jpg","order_by":6,"title":"Figure 6","display":"","copyAsset":false,"role":"figure","size":160145,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cstrong\u003e(a) sodium alginate-pectin beads (b) sodium alginate-xanthan gum beads\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"6.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/9c02a15168309afa14fe3c3b.jpg"},{"id":50575155,"identity":"3587d59c-b671-4cc5-aa85-6797143c710e","added_by":"auto","created_at":"2024-02-02 17:17:37","extension":"jpg","order_by":7,"title":"Figure 7","display":"","copyAsset":false,"role":"figure","size":185064,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFigure No.6:\u003c/strong\u003e\u003c/em\u003e\u003cstrong\u003e Comparative dissolution profile of pectin vildagliptin microspheres\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"61.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/c2fb81346898a66bf9a7dd5b.jpg"},{"id":50575767,"identity":"a1e4de7e-55fe-4b8c-958c-62f42eed9589","added_by":"auto","created_at":"2024-02-02 17:33:37","extension":"jpg","order_by":8,"title":"Figure 8","display":"","copyAsset":false,"role":"figure","size":183664,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFigure No.7:\u003c/strong\u003e\u003c/em\u003e \u003cstrong\u003eComparative dissolution profile of vildagliptin xanthan gum microsphere\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"7.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/c6bd03eb0f953acd10f63576.jpg"},{"id":50575768,"identity":"43e2ad7b-0c19-458a-a211-03fce51d6965","added_by":"auto","created_at":"2024-02-02 17:33:37","extension":"jpg","order_by":9,"title":"Figure 9","display":"","copyAsset":false,"role":"figure","size":409717,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFigure No.\u003c/strong\u003e\u003c/em\u003e\u003cstrong\u003e 8: In-vitro Drug Release Kinetics for Formulation F3 (a) Zero order Release Kinetics (b) First order (c) Higuchi'smodel (d) Hixson-Crowell’s \u0026nbsp;model(e) Korsmeyer-Peppa’s model\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"8.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/cef83a62aea462d0d03bfbc9.jpg"},{"id":50575369,"identity":"24f7fd26-c9b8-4360-9c84-65a002dff554","added_by":"auto","created_at":"2024-02-02 17:25:37","extension":"jpg","order_by":10,"title":"Figure 10","display":"","copyAsset":false,"role":"figure","size":158193,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFigure No.\u003c/strong\u003e\u003c/em\u003e\u003cstrong\u003e9: (a) SEM of optimized formulation at 1.00 mm with particle size (b) surface of microspheres at 40µm (c) surface of microspheres at 200µm (d) at1.00mm\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"9.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/c88074b87785ea0b60bfaba6.jpg"},{"id":50575161,"identity":"3bb9c574-b35b-45a5-803c-184021539a46","added_by":"auto","created_at":"2024-02-02 17:17:37","extension":"jpg","order_by":11,"title":"Figure 11","display":"","copyAsset":false,"role":"figure","size":121432,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFigure No.10\u003c/strong\u003e\u003c/em\u003e\u003cstrong\u003e: DSC of vildagliptin\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"10.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/2e1f98988eae6a2f90df8d53.jpg"},{"id":50574763,"identity":"dc4efcb9-c489-46fb-a4e1-3f88184db338","added_by":"auto","created_at":"2024-02-02 17:09:37","extension":"jpg","order_by":12,"title":"Figure 12","display":"","copyAsset":false,"role":"figure","size":133253,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFigure No.11\u003c/strong\u003e\u003c/em\u003e\u003cstrong\u003e: DSC of vildagliptin microspheres (F3)\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"11.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/d896286d573b617875f056d8.jpg"},{"id":50574759,"identity":"cbb3e893-c7c4-400d-81a7-ba6264531eaa","added_by":"auto","created_at":"2024-02-02 17:09:37","extension":"jpg","order_by":13,"title":"Figure 13","display":"","copyAsset":false,"role":"figure","size":145276,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFigure No.12: \u003c/strong\u003e\u003c/em\u003e\u003cstrong\u003ecomparative studies of marketed formulation and optimized pectin formulation (F3)\u003c/strong\u003e\u003c/p\u003e","description":"","filename":"12.jpg","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/a7a21a38356d3a07e81f707c.jpg"},{"id":50576363,"identity":"2f3e2d23-c39c-43df-8fb7-6aedc5463f9d","added_by":"auto","created_at":"2024-02-02 17:41:39","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1871533,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-3917925/v1/f1ad3df9-d5ad-4d5e-9631-b64637b6b277.pdf"}],"financialInterests":"The authors declare no competing interests.","formattedTitle":"\u003cp\u003e\u003cstrong\u003eFormulation and in-vitro Evaluation of Vildagliptin Microspheres Using Pectin and Xanthan Gum as Polymers\u003c/strong\u003e\u003c/p\u003e","fulltext":[{"header":"INTRODUCTION","content":"\u003cp\u003ePatients previously used conventional dosage forms such as tablets and capsules to treat acute and chronic disorders, however, these conventional dosage forms required many doses each day to maintain peak plasma level concentration. To solve these issues, contemporary and sophisticated techniques known as controlled drug delivery systems (CDDS) are being developed. The main purpose of a Controlled drug delivery system is to ensure optimum plasma drug concentration, thus enhancing efficacy, safety, and bioavailability of drug with improved patient compliance.\u003c/p\u003e \u003cp\u003eMicrospheres are carrier drug delivery systems, Microspheres are spherical, free-flowing,\u003csup\u003e[\u003cspan citationid=\"CR1\" class=\"CitationRef\"\u003e1\u003c/span\u003e]\u003c/sup\u003e and which are biodegradable or non-biodegradable in nature and have a particle size of 1 \u0026micro;m to 1000 \u0026micro;m. This is an important approach in delivering therapeutic substance to the target site with specificity if modified, and to maintain the desired concentration at the site of interest. Controlled drug delivery can be achieved using microspheres \u003csup\u003e[\u003cspan citationid=\"CR2\" class=\"CitationRef\"\u003e2\u003c/span\u003e]\u003c/sup\u003e.\u003c/p\u003e \u003cp\u003eSodium alginate is soluble in water and forms a reticulated structure which can be cross-linked with divalent or polyvalent cations to form insoluble meshwork. Calcium and zinc cations have been reported for cross-linking of acid groups of alginates. Pectin is a natural polymer with many applications due to its physicochemical parameters and biodegradability \u003csup\u003e[\u003cspan citationid=\"CR3\" class=\"CitationRef\"\u003e3\u003c/span\u003e]\u003c/sup\u003e. It is registered in the US Food and Drug Administration (FDA) as an additive with no daily consumption limits and thus can be widely used as an excipient in the formulation of matrix tablets, gels, pharmaceutical coatings, etc. \u003csup\u003e[\u003cspan citationid=\"CR4\" class=\"CitationRef\"\u003e4\u003c/span\u003e]\u003c/sup\u003e. Xanthan gum (XG) is a high molecular weight, an anionic extracellular polysaccharide that is produced by the gram-negative bacterium \u003cem\u003eXanthomonas campestris\u003c/em\u003e. It is widely used in food, cosmetics, and pharmaceuticals because of its encouraging reports on safety \u003csup\u003e[\u003cspan citationid=\"CR5\" class=\"CitationRef\"\u003e5\u003c/span\u003e]\u003c/sup\u003e It facilitates water retention and produces highly viscous solutions even at low concentrations. Furthermore, it was recently reported that xanthan gum has a potential blood-sugar-lowering and stabilizing effect. This last particular property makes xanthan gum an excellent candidate for the administration of active antidiabetic substances \u003csup\u003e[\u003cspan citationid=\"CR6\" class=\"CitationRef\"\u003e6\u003c/span\u003e, \u003cspan citationid=\"CR7\" class=\"CitationRef\"\u003e7\u003c/span\u003e]\u003c/sup\u003e. Given that natural polymers are safe, biocompatible, and biodegradable, their contribution to the formulation of dosage forms is noteworthy.\u003csup\u003e[\u003cspan citationid=\"CR21\" class=\"CitationRef\"\u003e21\u003c/span\u003e, \u003cspan citationid=\"CR22\" class=\"CitationRef\"\u003e22\u003c/span\u003e]\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eVildagliptin is a novel dual-type dipeptidyl peptidase-4 (DPP 4) inhibitor, that efficiently regulates endocrine levels in both hypoglycaemia and hyperglycaemia and can be used both as monotherapy and in grouping treatment for the cure of type 2 diabetes mellitus (T2DM) \u003csup\u003e[\u003cspan citationid=\"CR8\" class=\"CitationRef\"\u003e8\u003c/span\u003e]\u003c/sup\u003e. VLG is not efficient in providing control over drug delivery with usual oral dosage forms because of the short elimination half-life of 1.6 to 2.5 hand rapid metabolism, causing significant variations of drug levels in plasma. It is suggested that patients having (T2DM) should conform precisely to the dosing time and that vildagliptin should be taken twice daily 50 mg dose \u003csup\u003e[\u003cspan citationid=\"CR9\" class=\"CitationRef\"\u003e9\u003c/span\u003e, \u003cspan citationid=\"CR10\" class=\"CitationRef\"\u003e10\u003c/span\u003e]\u003c/sup\u003e.\u003c/p\u003e \u003cp\u003eIn this present study, a microsphere of vildagliptin was prepared with an optimum concentration of all ingredients and pectin, xanthan gum was used as a matrix-building material in combination with sodium alginate to provide a controlled and prolonged release.\u003c/p\u003e"},{"header":"MATERIALS AND METHODS","content":"\u003cdiv id=\"Sec3\" class=\"Section2\"\u003e \u003ch2\u003eMaterials\u003c/h2\u003e \u003cp\u003eVildagliptin (AET Lab Pvt Ltd), Pectin, Calcium chloride, Potassium dihydrogen phosphate (SDFCL (SD of fine-chem Ltd., Mumbai) Xanthan gum, sodium dihydrogen orthophosphate, Hydrochloric acid (NICE Chemicals (P) Ltd).\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec4\" class=\"Section2\"\u003e \u003ch2\u003ePreformulation studies\u003c/h2\u003e \u003cdiv id=\"Sec5\" class=\"Section3\"\u003e \u003ch2\u003eDetermination of λmax\u003c/h2\u003e \u003cp\u003eThe 10mg drug was weighed and taken in a volumetric flask, dissolved in 10 ml phosphate buffer.1ml sample was withdrawn and made up with 100ml of phosphate buffer to get a 10\u0026micro;g/ml concentration.10\u0026micro;g/ml concentration was scanned by using a double beam U V-visible spectrophotometer in the wavelength range from 200 to 400nm.\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv id=\"Sec6\" class=\"Section2\"\u003e \u003ch2\u003ePreparation of standard calibration curve \u003csup\u003e[\u003cspan citationid=\"CR11\" class=\"CitationRef\"\u003e11\u003c/span\u003e]\u003c/sup\u003e\u003c/h2\u003e \u003cp\u003e10mg drug was weighed and taken in a volumetric flask, dissolved in 10 m1 of phosphate buffer considered as stock-1, and 1ml of stock-1 solution can be withdrawn and made up with 100ml of phosphate buffer in a volumetric flask and considered as a stock 2 solution. Dilutions were prepared by using phosphate buffer in the range of 1\u0026micro;g-10\u0026micro;g concentration and absorbance was noted in the 210nm wavelength, A calibration curve was prepared by plotting the absorbance against the concentration.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec7\" class=\"Section2\"\u003e \u003ch2\u003eFourier transform infrared spectroscopy (FTIR) study \u003csup\u003e[\u003cspan citationid=\"CR11\" class=\"CitationRef\"\u003e11\u003c/span\u003e]\u003c/sup\u003e\u003c/h2\u003e \u003cp\u003eThe FTIR is a technique used to obtain an infrared spectrum of absorption of target material, that can be used to identify the functional groups and molecular structure. Pure vildagliptin and vildagliptin with a mixture of polymer FTIR spectra were recorded. The required quantity of KBR and vildagliptin and vildagliptin with polymer was mixed. Under hydraulic pressure of 600 kg, the disk was created using approximately 100 mg of the mixture. Then the FTIR spectra were recorded between 4000 and 400 cm\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e.\u003c/p\u003e \u003c/div\u003e\n\u003ch2\u003eMETHODOLOGY\u003c/h2\u003e\n\u003cp\u003ePreparation of vildagliptin microspheres using pectin and xanthan gum, The modified method (composition) is taken from \u003cb\u003eSreejan Manna et al\u003c/b\u003e\u003csup\u003e[\u003cspan citationid=\"CR17\" class=\"CitationRef\"\u003e17\u003c/span\u003e]\u003c/sup\u003e, and the cacl\u003csub\u003e2\u003c/sub\u003e is used as a cross-linker and the parameters, such as the drying process and stirring speed, differ from it ( \u003cb\u003eSreejan Manna et al).\u003c/b\u003e\u003c/p\u003e \u003cdiv id=\"Sec9\" class=\"Section2\"\u003e \u003ch2\u003ePreparation of sodium alginate-pectin microsphere\u003c/h2\u003e \u003cp\u003eSodium alginate-pectin microspheres were prepared by using the ionotropic gelation method, Sodium alginate, and pectin were weighed the accurate amount according to the composition, and dissolved in 25 ml of distilled water with continued stirring and add the vildagliptin drug into it and stirred for 30 mins with high rotational speed using a mechanical stirrer. Drug-polymer mixture was added dropwise into a cacl\u003csub\u003e2\u003c/sub\u003e solution and provided 30 mins for hardening, filtered it and placed for air drying. Different concentrations (F1, F2, F3, F4, F5, F6, F7) of microspheres are prepared according to the composition table no 1.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec10\" class=\"Section2\"\u003e \u003ch2\u003ePreparation of sodium alginate-xanthan gum microsphere\u003c/h2\u003e \u003cp\u003eSodium alginate-xanthan gum microspheres were prepared by using the ionotropic gelation method, Sodium alginate, and pectin were weighed the accurate amounts according to the composition, and dissolved in 25 ml of distilled water with continuous stirring, and add the vildagliptin drug into it and stirred for 30 mins with high rotational speed using a mechanical stirrer. Drug-polymer mixture was added dropwise into a cacl\u003csub\u003e2\u003c/sub\u003e solution and provided 30 mins for hardening, filtered it and placed for air drying. Different concentrations (X1, X2, X3, X4, X5, X6) of microspheres are prepared according to the composition table no 2.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec11\" class=\"Section2\"\u003e \u003ch2\u003eEVALUATION PARAMETERS OF MICROSPHERES\u003c/h2\u003e \u003cdiv id=\"Sec12\" class=\"Section3\"\u003e \u003ch2\u003eViscosity\u003c/h2\u003e \u003cp\u003eThe viscosity of solutions at various concentrations was measured by using a Brookfield viscometer. The tests were performed at room temperature with different spindles s64 and s61 and a 100-rpm shear rate.\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv id=\"Sec13\" class=\"Section2\"\u003e \u003ch2\u003ePhysical appearance\u003c/h2\u003e \u003cp\u003eAll the prepared microspheres were observed visually for colour and uniformity size.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec14\" class=\"Section2\"\u003e \u003ch2\u003ePercentage yield (%)\u003c/h2\u003e \u003cp\u003eThe prepared microspheres were weighed by using a weighing balance. weight microspheres were divided by the entire amount of drug and polymer used in the preparation of microspheres \u003csup\u003e[\u003cspan citationid=\"CR12\" class=\"CitationRef\"\u003e12\u003c/span\u003e]\u003c/sup\u003e.\u003cdiv id=\"Equa\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equa\" name=\"EquationSource\"\u003e\n$$\\mathbf{p}\\mathbf{e}\\mathbf{r}\\mathbf{c}\\mathbf{e}\\mathbf{n}\\mathbf{t}\\mathbf{a}\\mathbf{g}\\mathbf{e} \\mathbf{y}\\mathbf{i}\\mathbf{e}\\mathbf{l}\\mathbf{d}\\left(\\mathbf{\\%}\\right)=\\frac{\\mathbf{p}\\mathbf{r}\\mathbf{a}\\mathbf{t}\\mathbf{i}\\mathbf{c}\\mathbf{a}\\mathbf{l} \\mathbf{y}\\mathbf{i}\\mathbf{e}\\mathbf{l}\\mathbf{d}}{\\mathbf{t}\\mathbf{h}\\mathbf{e}\\mathbf{o}\\mathbf{r}\\mathbf{t}\\mathbf{i}\\mathbf{c}\\mathbf{a}\\mathbf{l} \\mathbf{y}\\mathbf{i}\\mathbf{e}\\mathbf{l}\\mathbf{d}} \\times 100$$\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec15\" class=\"Section2\"\u003e \u003ch2\u003eFlow properties\u003c/h2\u003e \u003cdiv id=\"Sec16\" class=\"Section3\"\u003e \u003ch2\u003eAngle of repose\u003c/h2\u003e \u003cp\u003eThe flow characteristics are measured by the angle of repose. The angle of repose was determined by using the funnel method. In this method, a funnel was secured with its tip at a 1cm height above the paper that was placed on a flat horizontal surface. Microspheres were carefully poured through the funnel until the apex of the conical pile just touched the tip of the funnel. Measure the height of the heap pile and the radius of the base with a ruler. The angle of repose was determined by using the equation \u003csup\u003e[\u003cspan citationid=\"CR13\" class=\"CitationRef\"\u003e13\u003c/span\u003e]\u003c/sup\u003e.\u003cdiv id=\"Equb\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equb\" name=\"EquationSource\"\u003e\n$$\\mathbf{t}\\mathbf{a}\\mathbf{n}\\varvec{\\theta }= \\frac{\\mathbf{h}}{\\mathbf{r}}$$\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003eWhere,\u003c/p\u003e \u003cp\u003eh\u0026thinsp;=\u0026thinsp;height of the file\u003c/p\u003e \u003cp\u003eR\u0026thinsp;=\u0026thinsp;radius of the base of the pile\u003c/p\u003e \u003cp\u003e\u0026Oslash; = angle of repose\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv id=\"Sec17\" class=\"Section2\"\u003e \u003ch2\u003eBulk density and tapped density:\u003c/h2\u003e \u003cp\u003eAccurately weighed 1g of microspheres are poured into a 10ml measuring cylinder and the initial volume was observed and volume is noted and the cylinder was tapped continuously up to 100 times and noted the tapped volume.it is expressed in gm/ml and calculated by using the given formula \u003csup\u003e[\u003cspan citationid=\"CR14\" class=\"CitationRef\"\u003e14\u003c/span\u003e]\u003c/sup\u003e.\u003cdiv id=\"Equc\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equc\" name=\"EquationSource\"\u003e\n$$\\mathbf{B}\\mathbf{D}= \\frac{\\mathbf{W}\\mathbf{e}\\mathbf{i}\\mathbf{g}\\mathbf{h}\\mathbf{t} \\mathbf{o}\\mathbf{f} \\mathbf{t}\\mathbf{h}\\mathbf{e} \\mathbf{p}\\mathbf{o}\\mathbf{w}\\mathbf{d}\\mathbf{e}\\mathbf{r}}{\\mathbf{I}\\mathbf{n}\\mathbf{i}\\mathbf{t}\\mathbf{i}\\mathbf{a}\\mathbf{l} \\mathbf{v}\\mathbf{o}\\mathbf{l}\\mathbf{u}\\mathbf{m}\\mathbf{e} } \\mathbf{T}\\mathbf{D}= \\frac{\\mathbf{W}\\mathbf{e}\\mathbf{i}\\mathbf{g}\\mathbf{h}\\mathbf{t} \\mathbf{o}\\mathbf{f} \\mathbf{t}\\mathbf{h}\\mathbf{e} \\mathbf{p}\\mathbf{o}\\mathbf{w}\\mathbf{d}\\mathbf{e}\\mathbf{r}}{\\mathbf{T}\\mathbf{a}\\mathbf{p}\\mathbf{p}\\mathbf{e}\\mathbf{d} \\mathbf{v}\\mathbf{o}\\mathbf{l}\\mathbf{u}\\mathbf{m}\\mathbf{e} }$$\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec18\" class=\"Section2\"\u003e \u003ch2\u003eCarr\u0026rsquo;s index\u003c/h2\u003e \u003cp\u003eThe compressibility of the granules is determined by Carr\u0026rsquo;s compressibility index.it is indirectly related to the relative flow rate cohesiveness. it was calculated by using the results of bulk density and tapped density. Calculated by using the given formula \u003csup\u003e[\u003cspan citationid=\"CR15\" class=\"CitationRef\"\u003e15\u003c/span\u003e]\u003c/sup\u003e.\u003cdiv id=\"Equd\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equd\" name=\"EquationSource\"\u003e\n$$\\mathbf{C}\\mathbf{a}\\mathbf{r}{\\mathbf{r}}^{\\mathbf{{\\prime }}}\\mathbf{s} \\mathbf{i}\\mathbf{n}\\mathbf{d}\\mathbf{e}\\mathbf{x} \\left(\\mathbf{\\%}\\right)= \\frac{\\mathbf{T}\\mathbf{D}-\\mathbf{B}\\mathbf{D}}{\\mathbf{T}\\mathbf{D}} \\times 100$$\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec19\" class=\"Section2\"\u003e \u003ch2\u003eHausner\u0026rsquo;s ratio\u003c/h2\u003e \u003cp\u003eHausner\u0026rsquo;s ratio was related to interparticle friction. It was also calculated by using the results of bulk density and tapped density \u003csup\u003e[\u003cspan citationid=\"CR16\" class=\"CitationRef\"\u003e16\u003c/span\u003e]\u003c/sup\u003e.\u003cdiv id=\"Eque\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Eque\" name=\"EquationSource\"\u003e\n$${\\mathbf{H}\\mathbf{a}\\mathbf{u}\\mathbf{s}\\mathbf{n}\\mathbf{e}\\mathbf{r}}^{\\mathbf{{\\prime }}}\\mathbf{s} \\mathbf{r}\\mathbf{a}\\mathbf{t}\\mathbf{i}\\mathbf{o}= \\frac{\\mathbf{T}\\mathbf{D}}{\\mathbf{B}\\mathbf{D}}$$\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec20\" class=\"Section2\"\u003e \u003ch2\u003eParticle size analysis\u003c/h2\u003e \u003cp\u003eParticle sizes of microspheres were determined by optical microscopy. The optical microscope was fitted with an eyepiece micrometer which was then calibrated with a stage microm eter. About 100 microspheres were randomly selected from each formulation and then the average size was calculated.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec21\" class=\"Section2\"\u003e \u003ch2\u003eSwelling index\u003c/h2\u003e \u003cp\u003eWeighed the beads 0.1g and placed them into 100ml of PH 1.2 Hcl buffer and followed by a PH 6.8 phosphate buffer solution and allow them to stand for 2 hours and then filtered the solution and weighed the microspheres and calculated by using the equation \u003csup\u003e[\u003cspan citationid=\"CR17\" class=\"CitationRef\"\u003e17\u003c/span\u003e]\u003c/sup\u003e.\u003cdiv id=\"Equf\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equf\" name=\"EquationSource\"\u003e\n$$\\mathbf{s}\\mathbf{w}\\mathbf{e}\\mathbf{l}\\mathbf{l}\\mathbf{i}\\mathbf{n}\\mathbf{g} \\mathbf{i}\\mathbf{n}\\mathbf{d}\\mathbf{e}\\mathbf{x}=\\frac{\\mathbf{f}\\mathbf{i}\\mathbf{n}\\mathbf{a}\\mathbf{l} \\mathbf{w}\\mathbf{e}\\mathbf{i}\\mathbf{g}\\mathbf{h}\\mathbf{t}-\\mathbf{i}\\mathbf{n}\\mathbf{i}\\mathbf{t}\\mathbf{i}\\mathbf{a}\\mathbf{l} \\mathbf{w}\\mathbf{e}\\mathbf{i}\\mathbf{g}\\mathbf{h}\\mathbf{t} }{\\mathbf{i}\\mathbf{n}\\mathbf{i}\\mathbf{t}\\mathbf{i}\\mathbf{a}\\mathbf{l} \\mathbf{w}\\mathbf{e}\\mathbf{i}\\mathbf{g}\\mathbf{h}\\mathbf{t}}\\times 100$$\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec22\" class=\"Section2\"\u003e \u003ch2\u003eDrug content\u003c/h2\u003e \u003cp\u003eWeighed the beads equivalent to 50mg 0f the drug, crushed them and mixed them with prepared 100 ml of phosphate buffer with 6.8PH and left them aside for 24 hours. After 24 hours the solution was filtered. The filtrate was subjected to suitable dilution. The filtrate was analyzed by using a UV-visible spectrophotometer at 210 nm \u003csup\u003e[\u003cspan citationid=\"CR18\" class=\"CitationRef\"\u003e18\u003c/span\u003e]\u003c/sup\u003e.\u003c/p\u003e \u003cdiv id=\"Sec23\" class=\"Section3\"\u003e \u003ch2\u003eInvitro drug release\u003c/h2\u003e \u003cp\u003eTo determine the amount of drug released over a period. To identify the drug release in stomach and in the intestine, this is carried out in 0.1N HCL (PH-1.2) and phosphate buffer (PH-6.8), using a USP type II dissolution apparatus (rotating paddle).\u003c/p\u003e \u003cp\u003eAccurately weighed 100mg beads and placed them into a dissolution media containing 900ml of 0.1N HCL (PH-1.2) buffer solution for 2 hours at a controlled temperature of 37 degrees. The speed of rotation was fixed at 100 rpm. At the prefixed time intervals, samples are withdrawn and analysed, and replaced with the same volume in it. After 2 hours the beads in an acidic medium were subjected to filtration and collected then subjected to further dissolution in phosphate buffer solution (PH-6.8). at the prefixed time interval sample was withdrawn and replaced same volume buffer. The solution was subjected to dilution and analysed by using a UV-visible spectrophotometer at 210nm \u003csup\u003e[\u003cspan citationid=\"CR19\" class=\"CitationRef\"\u003e19\u003c/span\u003e]\u003c/sup\u003e.\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv id=\"Sec24\" class=\"Section2\"\u003e \u003ch2\u003eMechanism of Release Kinetics\u003c/h2\u003e \u003cp\u003eDrug release mechanisms and kinetics are two characteristics of the dosage forms that play an essential role in describing drug dissolution profiles from a dosage form and hence understanding they\u0026rsquo;re in-vivo performance. The dissolution data obtained are fitted to various kinetic equations such as zero-order, first-order, Higuchi, Hixson-Crowell, and Korsmeyer-Peppas, and find the R\u003csup\u003e2\u003c/sup\u003e values of the release profile corresponding to each model.\u003c/p\u003e \u003cdiv id=\"Sec25\" class=\"Section3\"\u003e \u003ch2\u003eScanning electron microscope (SEM)\u003c/h2\u003e \u003cp\u003eScanning Electron Microscope was used to determine the Surface nature of microspheres. The microspheres were dried completely before examination and SEM was done at different magnifications \u003csup\u003e[\u003cspan citationid=\"CR20\" class=\"CitationRef\"\u003e20\u003c/span\u003e]\u003c/sup\u003e.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec26\" class=\"Section3\"\u003e \u003ch2\u003eDifferential scanning calorimetry (DSC)\u003c/h2\u003e \u003cp\u003eThe pure drug, and optimized formulation, were subjected to DSC studies by using a differential scanning calorimeter equipped with a computer analyzer. Each sample weighing 1 mg was placed into standard aluminium pans and sealed, and a bare aluminium pan was used as a reference, The Scan was carried out at a heating rate of 10\u003csup\u003eo\u003c/sup\u003eC / min under a nitrogen atmosphere over a temperature range of 300C-3000\u003csup\u003eo\u003c/sup\u003eC \u003csup\u003e[\u003cspan citationid=\"CR20\" class=\"CitationRef\"\u003e20\u003c/span\u003e]\u003c/sup\u003e.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec27\" class=\"Section3\"\u003e \u003ch2\u003eStability studies\u003c/h2\u003e \u003cp\u003eThe Stability of a pharmaceutical product may be defined as the capability of a particular formulation in a specific container/closure system to remain within its physical, chemical, microbiological, therapeutic, and toxicological specifications. The stability of all the formulations was carried out at different temperatures as per ICH guidelines. In the present study, stability studies were carried out for a specific time period of up to 90 days for selected formulations at 40\u0026ordm;C\u0026thinsp;\u0026plusmn;\u0026thinsp;20\u0026ordm;C/75%\u0026plusmn;5% RH in a humidity control oven. The formulations were packed in butter paper, followed by aluminium foil. After 3 months, the selected formulations were analyzed for their physical parameters like appearances, flow properties, swelling index, and performance parameters like drug content uniformity, and Invitro dissolution study.\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv id=\"Sec28\" class=\"Section2\"\u003e \u003ch2\u003eStatistical analysis\u003c/h2\u003e \u003cp\u003eExperimental data were expressed as the mean value\u0026thinsp;\u0026plusmn;\u0026thinsp;S.D. Statistical analysis was performed using the normality test and one-way analysis of variance (ANOVA) test using a graph pad prism (version 5, GraphPad Software, San Diego, California, USA). Differences were considered to be statistically significant when p\u0026thinsp;\u0026lt;\u0026thinsp;0.05 for ANOVA and while normality test is well accepted for the above formulations at a level of significance of 5 percent.\u003c/p\u003e \u003c/div\u003e"},{"header":"RESULTS AND DISCUSSION","content":"\u003cdiv id=\"Sec30\" class=\"Section2\"\u003e\n\u003ch2\u003ePreformulation studies\u003c/h2\u003e\n\u003cdiv id=\"Sec31\" class=\"Section3\"\u003e\n\u003ch2\u003eAbsorbance maxima\u003c/h2\u003e\n\u003cp\u003eThe sample was prepared with a phosphate buffer. Using a spectrophotometer, the maximum absorbance of the sample was measured, the vildagliptin spectrum gave the highest peak at 210 nm. indicating the wavelength where it absorbs light most strongly fig no 1.\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv id=\"Sec32\" class=\"Section2\"\u003e\n\u003ch2\u003eStandard Calibration Curve\u003c/h2\u003e\n\u003cp\u003eFrom the Standard Calibration Curve vildagliptin, it was observed that the drug obeys Beer\u0026rsquo;s law in the concentration range of 1\u0026ndash;10 \u0026micro;g/ml in Phosphate Buffer (PH6.8) and shows linearity (R\u003csup\u003e2\u003c/sup\u003e\u0026thinsp;=\u0026thinsp;0.9902). The linear Regression equation generated was used for the calculation of the amount of drug. Fig no:2\u003c/p\u003e\n\u003cdiv id=\"Sec33\" class=\"Section3\"\u003e\n\u003ch2\u003eFourier-transform infrared spectroscopy (FTIR)\u003c/h2\u003e\n\u003cp\u003eFT-IR spectra of vildagliptin and vildagliptin with Polymers are shown in Figs.\u0026nbsp;3, 4, and 5. Pure vildagliptin showed principal absorption peaks at 735.67 cm\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e (C-H Bending), 1034.69 cm\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e (C\u0026thinsp;=\u0026thinsp;O stretching), 1399.5 cm\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003ecm-1 (-NO\u003csub\u003e2\u003c/sub\u003e bending)1651.73cm\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e (\u0026gt;\u0026thinsp;C\u0026thinsp;=\u0026thinsp;C\u0026thinsp;\u0026lt;\u0026thinsp;stretching) and2909.90 cm\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e (C-H stretching). The identical peaks of C-H Bending C\u0026thinsp;=\u0026thinsp;O stretching, -NO\u003csub\u003e2\u003c/sub\u003e bending, \u0026gt;C\u0026thinsp;=\u0026thinsp;C\u0026thinsp;\u0026lt;\u0026thinsp;stretching and C-H stretching vibrations were also noticed in the spectra of the drug with polymers. FT-IR spectra revealed that there was no interaction between the drug and the polymer used for formulations.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"Sec34\" class=\"Section3\"\u003e\n\u003ch2\u003eViscosity\u003c/h2\u003e\n\u003cp\u003eThe viscosity of sodium alginate-pectin microspheres ranged from 150 to 40.25 and viscosity gradually decreased. the viscosity of sodium alginate-xanthan gum microspheres ranges from 180 to 864, viscosity gradually increased due to xanthan gum. The data shown in table 3\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003ch2\u003ePercentage yield\u003c/h2\u003e\n\u003cp\u003eThe percentage yield of sodium alginate-pectin microspheres ranged from 89 to 97%. and the percentage yield of sodium alginate-xanthan gum microspheres ranged from 87 to 95%. Values are shown in table 3\u003c/p\u003e\n\u003ch2\u003eFlow properties\u003c/h2\u003e\n\u003cp\u003eVildagliptin microspheres show excellent flow properties.\u003c/p\u003e\n\u003cp\u003eThe bulk density of all formulations was found to be in the range of 0.77 to 0.55gm/ml, whereas the tapped density was observed between 0.84 to 0.583 gm/ml. From the values of bulk density and tapped density, the values for the compressibility index and Hausner\u0026rsquo;s ratio were calculated. The values for compressibility index were found between 5.17 to14.2%. The values for Hausner\u0026rsquo;s ratio were found in between 1.04 to 1.16. All these values are within the specified limit which indicates good flow properties. The angle of repose was found to be less than 20 which indicates good flow. Overall, these values indicate good flow properties. The results is given in below table 4.\u003c/p\u003e\n\u003cdiv id=\"Sec37\" class=\"Section2\"\u003e\n\u003ch2\u003eParticle size analysis\u003c/h2\u003e\n\u003cp\u003eThe particle size of vildagliptin-loaded microspheres ranges found to be 1671 to 1530\u0026micro;m. and the highest particle size is F7 and lowest is F5 in pectin microspheres. The highest particle size is X4 and the lowest is X2 in xanthan gum microspheres. Values are shown in table 5\u003c/p\u003e\n\u003cdiv id=\"Sec38\" class=\"Section3\"\u003e\n\u003ch2\u003eSwelling index\u003c/h2\u003e\n\u003cp\u003eMicrospheres in phosphate buffer show a high swelling rate showed in table no 5 Compared to acidic buffer. among all formulations F6, and F7 showing are high swelling rates. The data shown in table. 5\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv id=\"Sec39\" class=\"Section2\"\u003e\n\u003ch2\u003eDrug content\u003c/h2\u003e\n\u003cp\u003eF1 and F3 formulations show high drug content when compare with other formulations. Result is shown in table 5\u003c/p\u003e\n\u003cdiv id=\"Sec40\" class=\"Section3\"\u003e\n\u003ch2\u003eComparative dissolution profile of pectin- vildagliptin microspheres\u003c/h2\u003e\n\u003cp\u003eComparison of invitro drug release of all microsphere\u0026rsquo;s formulations prepared using sodium alginate-pectin are shown in table no 6 fig no:6 F3 formulation shows the highest amount of drug release of 98.6% when compared to other formulations.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eComparative dissolution profile of xanthan gum-vildagliptin microspheres\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eComparison of invitro drug release of all microsphere\u0026rsquo;s formulations prepared using sodium alginate-xanthan gum are shown in table no 7 Fig no 7.X4 and X6 formulation shows the highest amount of drug release of 97.1% and 98.42% when compared to other formulations.\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv id=\"Sec41\" class=\"Section2\"\u003e\n\u003ch2\u003eStatistical analysis\u003c/h2\u003e\n\u003cp\u003eThe formulated vildagliptin microspheres by using pectin and xanthan gum were subjected to one-way ANOVA and normality tests using Graph pad prism. The statistical analysis of one-way ANOVA produces a p-value that tends to be \u0026lt;\u0026thinsp;0.0001. At the same time, the normality test is well accepted for all formulations at a significance level of \u0026lt;\u0026thinsp;0.05%.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eSelection of Optimized Formulation\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eBased on the above results, the two preparations have the two best formulations (F3 and X6), and when comparing the results obtained from various evaluation parameters of the two formulations i.e., percentage yield (91% and 95%), particle size (1590\u0026micro;m and 1615\u0026micro;m), swelling index (1400 and 1620), drug content (31mg and 4.01mg), and drug release (98.6 and 98.4). from this data of two formulations, F3 has good particle size, high drug content, and in-vitro drug release, so, F3 is considered the optimized formulation. Then SEM and DSC were also performed for the optimized formulation to determine the size, and melting point and confirm its functional structure. stability study and a comparative study was done for the optimized formulation.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eDrug Release Kinetic Studies\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThe release data were fitted to zero order, first order, Korsmeyer-peppas model and Higuchi equation to know the mechanism of drug release from the microspheres and drug release mechanism of optimized formulation (F3) is a tablet no 8, fig no 8\u003c/p\u003e\n\u003cp\u003eThe release profile of the optimized formulation F3, following zero order and Higuchi kinetic model.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eScanning Electron Microscopy (SEM)\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eOptimized formulation is subjected for Scanning electron microscopy, the microspheres appear spherical and hemispherical/ semi spherical in shape observed in fig no. 9 and with diameters ranging from 1.59mm or 1590\u0026micro;m to 1.66mm or 1660\u0026micro;m fig no 9. The surface of the microsphere was demonstrated as rough in one and smooth in the other observed in fig no 9(a) and cracks or fractures emerging on the surface might be caused by external temperature and stress conditions affecting the microspheres.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eDifferential Scanning Calorimetry (DSC)\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eDifferential scanning calorimetry (DSC) studies were performed for the optimized formulation and drug sample, fig no: 10 DSC of the drug showed a sharp peak at158.88\u0026ordm;C. fig no:11 DSC of optimized formulation of microspheres showing a board peak from 192.43\u0026ordm;C to 222.09\u0026ordm;C and a peak at 196.49\u0026ordm;C, at 302.85\u0026deg;C an exothermic peak was observed such a phenomenon is called cold crystallization.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eComparative study\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eA comparison study was conducted between the optimized formulation (F3) and the marketed formulation of Vildagliptin tablets (Galvas\u0026reg; (50mg); Norvartis). Data comparisons for these two formulations the optimized formulation (x6) showing better control than the marketed formulation. Drug release of marketed formulation took 2 hours to reach 99.41% and optimized formulation take 8 hours to reach 98.6%. the optimized formulation showing better controlled release and taking long time to release (8 hrs.) than the marketed formulation. table no 9\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eStability studies\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eStability studies of the prepared microspheres were carried out by storing optimized formulation (F3) at room temperature humidity and 40\u0026ordm;C\u0026thinsp;\u0026plusmn;\u0026thinsp;2\u0026ordm;C/75% RH\u0026thinsp;\u0026plusmn;\u0026thinsp;5% RH in a humidity control oven for ninety days. Stability studies were carried out to predict the degradation that may occur over a prolonged storage period with different temperatures and humidities. Results were decreased when compared with fresh microspheres and results was tableted 10 below.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eInference\u003c/strong\u003e:\u003c/p\u003e\n\u003cp\u003eOther evaluation parameters as also done, such as flow properties (bulk density, tapped density, Carr\u0026rsquo;s index, and Hauser\u0026rsquo;s ratio) particle size, and swelling index there is no significant difference in values.\u003c/p\u003e\n\u003c/div\u003e"},{"header":"CONCLUSION","content":"\u003cp\u003eThe present study has been a satisfactory attempt to formulate microspheres of Vildagliptin, an oral administration of microspheres used to treat type 2 diabetes mellitus. The therapeutic range may be maintained with a controlled release of the medication in the gastrointestinal tract. An ionotropic gelation technique was employed to synthesize both sodium alginate-pectin and sodium alginate-xanthan gum vildagliptin-loaded microspheres. FTIR study confirmed the no drug-polymer interactions. Particle size ranges from 1530\u0026micro;m to 1679\u0026micro;m. The swelling study performed in acidic and alkaline media revealed a good release in alkaline solution PH-6.8 in beads. The in vitro drug release experimental study had succeeded based on the ratio of beads, although all microspheres exhibited satisfactory results, the best results were obtained with optimized formulation F3 of sodium alginate-pectin. Based on exponent values it shows diffusion release. Performed the SEM and DSC for optimized formulation. when compared with the marketed formulation of vildagliptin tablets (galvus\u0026reg; 50mg) with vildagliptin microspheres are shows greater controlled release than the marketed formulation. stability studies were conducted for optimized formulation for 90 days, there are no significant changes.\u003c/p\u003e\n\u003cp\u003eThe above study concluded that formulated microspheres of vildagliptin would be more efficacious and acceptable than conventional drug delivery of vildagliptin and have a satisfactorily controlled release profile, which may provide increased therapeutic efficacy, decrease dosing frequency, and improves patient compliance.\u003c/p\u003e\n\u003cp\u003e\u003cspan type=\"BoldSmallCaps\" class=\"BoldSmallCaps\" name=\"Emphasis\"\u003e\u003cstrong\u003eFuture scope\u003c/strong\u003e\u003c/span\u003e\u003c/p\u003e\n\u003cp\u003eFurther the formulations may be suggested for the in-vivo bioavailability studies and in-vivo in-vitro correlation studies are to be done to establish the efficacy of these formulations.\u003c/p\u003e"},{"header":"Declarations","content":"\u003cp\u003e\u003cstrong\u003eACKNOWLEDGEMENT\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eI would like to thank management of Narayana pharmacy college, Nellore for their support during this research work. I am thankful to D. Harinarayana, CEO of NISHKA Research Pvt, Ltd., Hyderabad and RV labs, Guntur for their analytical study help in this research work.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eFunding Support\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThe authors declare that they have no funding support for this study.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eConflict of Interest\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThe authors declare that they have no conflict of interest for this study\u003c/p\u003e"},{"header":"References","content":"\u003col\u003e\n\u003cli\u003eDeshmukh PP, Barhate AN. Formulation and evaluation of microspheres of Glibenclamide by inotropic gelation method. Indo-American Journal of Pharmaceutical Research. 2017;7(9).\u003c/li\u003e\n\u003cli\u003eMane S. Effect of formulation variables on the characteristics of vildagliptin microspheres. IP International Journal of Comprehensive and Advanced. 2022 Jul; 3(1): 134-140.\u003c/li\u003e\n\u003cli\u003eMay CD. Industrial pectins: Sources, production and applications. Carbohydrate polymers. 1990 Jan 1;12(1):79-99.\u003c/li\u003e\n\u003cli\u003eVillica\u0026ntilde;a-Molina E, Pacheco-Contreras E, Aguilar-Reyes EA, Le\u0026oacute;n-Pati\u0026ntilde;o CA. Pectin and chitosan microsphere preparation via a water/oil emulsion and solvent evaporation method for drug delivery. International Journal of Polymeric Materials and Polymeric Biomaterials. 2020 May 2;69(7):467-75.\u003c/li\u003e\n\u003cli\u003eBhattacharya SS, Mazahir F, Banerjee S, Verma A, Ghosh A. Preparation and in vitro evaluation of xanthan gum facilitated superabsorbent polymeric microspheres. Carbohydrate polymers. 2013 Oct 15;98(1):64-72.\u003c/li\u003e\n\u003cli\u003eFuwa M, Nakanishi Y, Moritaka H. Effect of xanthan gum on blood sugar level of cooked rice. InAbstracts of Annual Congress of The Japan Society of Home Economics 67th Annual Conglress of The Japan Society of Home Economics 2015 (p. 179). The Japan Society of Home Economics.\u003c/li\u003e\n\u003cli\u003eYahoum MM, Toumi S, Tahraoui H, Lefnaoui S, Kebir M, Amrane A, Assadi AA, Zhang J, Mouni L. Formulation and Evaluation of Xanthan Gum Microspheres for the Sustained Release of Metformin Hydrochloride. Micromachines. 2023 Mar 6;14(3):609.\u003c/li\u003e\n\u003cli\u003eKumari B, Khansili A. Analytical method development and validation of UV-visible spectrophotometric method for the estimation of vildagliptin in the gastric medium. Drug Research. 2020 Sep;70(09):417-23.\u003c/li\u003e\n\u003cli\u003ePratley RE, Jauffret-Kamel S, Galbreath E, Holmes D. Twelve-week monotherapy with the DPP-4 inhibitor vildagliptin improves glycemic control in subjects with type 2 diabetes. Hormone and metabolic research. 2006 Jun;38(06):423-8.\u003c/li\u003e\n\u003cli\u003eKumari B, Khansili A, Kumar M. Development and Optimization of Vildagliptin Loaded Floating Microspheres using Central Composite Design: In vitro and In vivo Evaluation. Annals of the Romanian Society for Cell Biology. 2021 Jul 20:12742-55.\u003c/li\u003e\n\u003cli\u003eAtara SA, Soniwala MM. Formulation and evaluation of pectin-calcium chloride beads of azathioprine for colon-targeted drug delivery system. Int J Pharm Pharm Sci. 2018;10:172-7.\u003c/li\u003e\n\u003cli\u003eRudhali lihare kfhl. Preparation and evaluation of topiramate-loaded microspheres by ionotropic gelation method. World journal of pharmacy and pharmaceutical sciences.2020 sept;9(12): 1291-1310.\u003c/li\u003e\n\u003cli\u003eKumar K, Pant NC, Ahmad S, Fateh MV, Rai AK, Verma B, Chaurasia H. Development and evaluation of floating microspheres of curcumin in alloxan-induced diabetic rats. Tropical Journal of Pharmaceutical Research. 2016 Oct 5;15(9):1819-25.\u003c/li\u003e\n\u003cli\u003eKawashima Y, Niwa T, Takeuchi H, Hino T, Itoh Y. Hollow microspheres for use as a floating controlled drug delivery system in the stomach. Pharm Sci 1992; 81: 135-140.\u003c/li\u003e\n\u003cli\u003eAulton ME. Pharmaceutics - The Science of Dosage Form Design, Churchill Livingstone, Elsevier Science Ltd; 2002; (2): pp 315-320.\u003c/li\u003e\n\u003cli\u003eMulla TS, Salunkhe VR, Bhinge SD, Mohire N. Formulation, design and optimization of antidiabetic drug loaded microspheres. Polymer Bulletin. 2023 Jun;80(6):6171-96.\u003c/li\u003e\n\u003cli\u003eManna S, Aziz A, Das S, Bhowmik M. Ionically Cross-linked Pectin-alginate Hydrogel Beads for Prolonged Release of Glibenclamide. International Journal of Pharmaceutical Investigation. 2022 Oct 1;12(4).\u003c/li\u003e\n\u003cli\u003eMohapatra DK, Roy H, Pattanayak D, Nandi S, Senapati P. Design and in vitro evaluation of cefuroxime axetil floating microbeads for the treatment of hospital acquired infection. Int. J. Pharm. Sci. and health care. 2012;2(2):36-51. Drug content\u003c/li\u003e\n\u003cli\u003eNaik JB, Waghulde MR. Development of vildagliptin loaded Eudragit\u0026reg; microspheres by screening design: In vitro evaluation. Journal of Pharmaceutical Investigation. 2018 Nov 15;48:627-37.\u003c/li\u003e\n\u003cli\u003eDewan I, Islam S, Rana MS. Characterization and compatibility studies of different rate retardant polymer loaded microspheres by solvent evaporation technique: in vitro-in vivo study of vildagliptin as a model drug. Journal of drug delivery. 2015;2015.\u003c/li\u003e\n\u003cli\u003eManubolu K, Munna S, Bonnoth CK. A Study on Extraction and Characterization of Vigna mungo Polymer. , Int. J. Res. Pharm. Sci., 2021, 12(3), 1870-1878.\u003c/li\u003e\n\u003cli\u003eManubolu K, Munna S, Bonnoth CK, Mohan GR. Design and Optimization of Floating Microspheres Using Natural Polymer.(2021). Int. J. Life Sci. Pharma Res.;11(1):166-83.\u003c/li\u003e\n\u003c/ol\u003e"},{"header":"Tables","content":"\u003cp\u003e\u003cstrong\u003e\u003cem\u003eTable no 1: \u003c/em\u003eComposition of sodium alginate-pectin microspheres\u003c/strong\u003e\u003c/p\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Taba\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSL.\u003c/div\u003e\n\u003cdiv class=\"SimplePara\"\u003eNo\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eFormulation\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSodium\u003c/div\u003e\n\u003cdiv class=\"SimplePara\"\u003ealginate (mg)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ePectin (mg)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eDrug(mg)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eCrosslinker\u003c/div\u003e\n\u003cdiv class=\"SimplePara\"\u003e(calcium chloride)\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e900\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e100\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e800\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e200\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50 mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e700\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e300\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e600\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e400\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e500\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e500\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e400\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e600\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e250\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e750\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eTable no 2:\u003c/em\u003e\u003c/strong\u003e\u003cstrong\u003e Composition of sodium alginate-xanthan gum microspheres\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabb\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSL. No\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eFormulation\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSodium alginate(mg)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eXanthan gum(mg)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eDrug(mg)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eCrosslinker (calcium chloride)\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e900\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e100\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e850\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e150\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50 mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e800\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e200\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e750\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e250\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e700\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e300\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e650\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e350\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50mg\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2.5%\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003eTable no. 3: Viscosity, % yield, and appearances of sodium alginate-pectin microspheres\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabc\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eS. No\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eFormulation\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eViscosity (Cp)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ePercentage yield (%)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eAppearances of beads\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF1\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e150\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e89\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eGoldish brown, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF2\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e134\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e90\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eolive green, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF3\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e109\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e91\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eolive green, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF4\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e80\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e97\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSand brown, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF5\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e67\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e94\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSand brown, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF6\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e52.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e95\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eBrown, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF7\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e40.25\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e96\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eBrown, Spherical, oval\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX1\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e180\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e88\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ePale white, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e9\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX2\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e276\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e93\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ePale white, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e10\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX3\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e368\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e87\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ePale white, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e11\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX4\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e521\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e93\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ePale white, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX5\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e690\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e94\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ePale white, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e13\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX6\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e864\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e95\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ePale white, Spherical\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eTable no. 4\u003c/em\u003e\u003c/strong\u003e\u003cstrong\u003e: Flow properties of vildagliptin microspheres\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabd\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eFormulation\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eAngle of repose(\u0026ordm;)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eBulk density\u003c/div\u003e\n\u003cdiv class=\"SimplePara\"\u003e(g/ml)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eTapped density(g/ml)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eCarr\u0026rsquo;s index\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eHausner\u0026rsquo;s ratio\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF1\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e10.30\u0026thinsp;\u0026plusmn;\u0026thinsp;0.1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.73636\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.81\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e9.8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.109\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF2\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5.19\u0026thinsp;\u0026plusmn;\u0026thinsp;0.54\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.7769\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.8416\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e8.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.09\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF3\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e14.91\u0026thinsp;\u0026plusmn;\u0026thinsp;0.2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.74\u0026thinsp;\u0026plusmn;\u0026thinsp;0.07\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.7928\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.06\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF4\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e13.49\u0026thinsp;\u0026plusmn;\u0026thinsp;0.4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.706\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.74\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5.8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.04\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF5\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e17.74\u0026thinsp;\u0026plusmn;\u0026thinsp;0.4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.715\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.775\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e7.7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.08\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF6\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e9.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.64705\u0026thinsp;\u0026plusmn;\u0026thinsp;0.07\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.7333\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.14\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eF7\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e17.74\u0026thinsp;\u0026plusmn;\u0026thinsp;0.1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.55\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.5833\u0026thinsp;\u0026plusmn;\u0026thinsp;0.07\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5.17\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.05\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX1\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e14.03\u0026thinsp;\u0026plusmn;\u0026thinsp;0.09\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.5857\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.6833\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e10\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.16\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX2\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e15.16\u0026thinsp;\u0026plusmn;\u0026thinsp;0.1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.5863\u0026thinsp;\u0026plusmn;\u0026thinsp;0.07\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.645\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e9.51\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.10\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX3\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e17.35\u0026thinsp;\u0026plusmn;\u0026thinsp;0.4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.5857\u0026thinsp;\u0026plusmn;\u0026thinsp;0.09\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.6473\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e10\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.105\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX4\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e11.30\u0026thinsp;\u0026plusmn;\u0026thinsp;0.07\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.635\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.7055\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e14.28\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.11\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX5\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e14.83\u0026thinsp;\u0026plusmn;\u0026thinsp;0.5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.5952\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.6944\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e14.2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.16\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eX6\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e14.89\u0026thinsp;\u0026plusmn;\u0026thinsp;0.2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.6047\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.7055\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e14.28\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.16\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eTable no. 5:\u003c/em\u003e\u003c/strong\u003e\u003cstrong\u003e\u0026nbsp;Swelling index of pectin-vildagliptin microspheres\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabe\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSL.NO\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eFormulation\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eMean particle size (\u0026micro;m)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSwelling index of microspheres in phosphate buffer\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eSwelling index of microspheres in acidic (Hcl) buffer\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eDrug content (mgs)\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1619\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1520\u0026thinsp;\u0026plusmn;\u0026thinsp;1.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e210\u0026thinsp;\u0026plusmn;\u0026thinsp;0.7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e47.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.10\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1665\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1310\u0026thinsp;\u0026plusmn;\u0026thinsp;0.9\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e160\u0026thinsp;\u0026plusmn;\u0026thinsp;0.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e16.03\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1590\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1400\u0026thinsp;\u0026plusmn;\u0026thinsp;0.4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e160\u0026thinsp;\u0026plusmn;\u0026thinsp;0.5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e31\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1561\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1330\u0026thinsp;\u0026plusmn;\u0026thinsp;0.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e200\u0026thinsp;\u0026plusmn;\u0026thinsp;0.8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e13\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1552\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1410\u0026thinsp;\u0026plusmn;\u0026thinsp;1.0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e210\u0026thinsp;\u0026plusmn;\u0026thinsp;0.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e20.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1622\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1680\u0026thinsp;\u0026plusmn;\u0026thinsp;0.6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e320\u0026thinsp;\u0026plusmn;\u0026thinsp;0.2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1641\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2120\u0026thinsp;\u0026plusmn;\u0026thinsp;1.21\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e700\u0026thinsp;\u0026plusmn;\u0026thinsp;0.9\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e13.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.4\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1579\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1250\u0026thinsp;\u0026plusmn;\u0026thinsp;1.07\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e100\u0026thinsp;\u0026plusmn;\u0026thinsp;0.97\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.09\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e9\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1530\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1200\u0026thinsp;\u0026plusmn;\u0026thinsp;1.6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e50\u0026thinsp;\u0026plusmn;\u0026thinsp;0.3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.10\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e10\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1583\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1330\u0026thinsp;\u0026plusmn;\u0026thinsp;1.2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e170\u0026thinsp;\u0026plusmn;\u0026thinsp;0.9\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e11\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1671\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1260\u0026thinsp;\u0026plusmn;\u0026thinsp;0.98\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e140\u0026thinsp;\u0026plusmn;\u0026thinsp;0.81\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1602\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1590\u0026thinsp;\u0026plusmn;\u0026thinsp;1.1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e190\u0026thinsp;\u0026plusmn;\u0026thinsp;0.8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4.0\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e13\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1615\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1620\u0026thinsp;\u0026plusmn;\u0026thinsp;1.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e220\u0026thinsp;\u0026plusmn;\u0026thinsp;1.2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\"\u0026plusmn;\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4.01\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eTable no. 6:\u003c/em\u003e\u003c/strong\u003e \u003cstrong\u003eComparative dissolution profile of\u0026nbsp; pectin vildagliptin microspheres\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabf\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eTime in hrs.\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF1\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF2\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF3\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF4\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF5\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF6\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF7\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.10\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e16.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.10\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e18\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e15.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e21.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12.5\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e20.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.12\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e21.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e11.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e18.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e26.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e24.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e15.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e39.2\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e47.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e13.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e27.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.1\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e30.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e43.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e23.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e40.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e52\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e29.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e33.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e45.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e52.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e35.0\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e43.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e60\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e30.2\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e38.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e57\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e59.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e45.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e65.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.12\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e68.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e52.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e53.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.07\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e64.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.09\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e75.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e73.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.10\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e74.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e81\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e63. \u0026plusmn;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e67.5\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e73.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e82\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e83.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.09\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e81.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.09\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e94.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e76.2\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e81.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e90.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e95.2\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e98.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e93.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.08\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e96.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e91.5\u0026thinsp;\u0026plusmn;\u0026thinsp;0.09\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e90\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003eTable no. 7: Comparative dissolution profile of vildagliptin xanthan gum microspheres\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabg\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eTime in hrs.\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX1\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX2\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX3\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX4\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX5\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eX6\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4.7\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e8.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12.57\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e11.68\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e18.06\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e15.89\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e9.51\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12.2\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e22.97\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12.57\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e22.75\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e18.32\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e17.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e15.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e34.92\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e18.76\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e30.51\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e27.17\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e25.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e30.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e40.01\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e29.39\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e36.69\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e31.16\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e36.02\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e42.8\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e59.05\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e42.45\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e48.42\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e38.02\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e44.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e51.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e67.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e54.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e57.9\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e52.41\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e47.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e67.4\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e74.54\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e76.53\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e78.97\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e78.97\u0026thinsp;\u0026plusmn;\u0026thinsp;0.06\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e59\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e74.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e80.96\u0026thinsp;\u0026plusmn;\u0026thinsp;0.04\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e87.6\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e81.18\u0026thinsp;\u0026plusmn;\u0026thinsp;0.03\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e85.61\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e65.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e79.3\u0026thinsp;\u0026plusmn;\u0026thinsp;0.05\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e86.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.01\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e97.1\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e96.67\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e98.42\u0026thinsp;\u0026plusmn;\u0026thinsp;0.02\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003eTable no. 8: Release Kinetics\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabh\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eFormulation\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003ezero order\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eFirst-order kinetics\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eHiguchi release model\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eHixson Crowell\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eKorsmeyer Peppas\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eF3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.9808\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.3695\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.8994\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.8844\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.8318\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eTable no.9:\u003c/em\u003e\u003c/strong\u003e\u003cstrong\u003e Comparison study of optimized formulation with a marketed formulation\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabi\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eTime (hrs)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eMarketed formulation (galvus\u0026reg;\u003csup\u003e)\u003c/sup\u003e\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eOptimized formulation (F3)\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e28.41\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e0.5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e63.2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5.4\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e1\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e90.57\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e12.5\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e2\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e99.41\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e15.4\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e3\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u0026nbsp;\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e23.4\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e4\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u0026nbsp;\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e35.04\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e5\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u0026nbsp;\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e45.6\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e6\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u0026nbsp;\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e73.7\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e7\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u0026nbsp;\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e83.4\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e8\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u0026nbsp;\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e98.6\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003eTable no.10\u003cem\u003e:\u003c/em\u003e Stability studies of optimized pectin formulation\u003c/strong\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"gridtable\"\u003e\n\u003ctable id=\"Tabj\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eStorage condition\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eDays\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003eDrug content (mgs)\u003c/div\u003e\n\u003c/th\u003e\n\u003cth align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e%Drug release\u003c/div\u003e\n\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\" align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eRoom temperature\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e30\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e31\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e98.4\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e60\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e31\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e98.4\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e90\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e31\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e98.3\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\" align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e\u003cspan class=\"Bold\"\u003eAt40\u0026ordm;C AND 75% RH\u003c/span\u003e\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e30\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e31\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e98\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e60\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e30.9\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e97.1\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"char\" char=\".\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e90\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e30\u003c/div\u003e\n\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\n\u003cdiv class=\"SimplePara\"\u003e97.1\u003c/div\u003e\n\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003c/div\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":true,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"NARAYANA PHARMACY COLLEGE, NELLORE, ANDHRA PRADESH, INDIA 524003","isAcceptedByJournal":false,"isAuthorSuppliedPdf":false,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"vildagliptin, calcium chloride ion, sodium alginate, Pectin, and xanthan Gum, pH-sensitive bead","lastPublishedDoi":"10.21203/rs.3.rs-3917925/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-3917925/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003ch2\u003eAim\u003c/h2\u003e \u003cp\u003eThe aim of the work is a formulation and in vitro evaluation of the vildagliptin microsphere using pectin and xanthan gum.\u003c/p\u003e\u003ch2\u003eObjective\u003c/h2\u003e \u003cp\u003eVildagliptin is a dipeptidyl peptidase-4 (DPP-4) inhibitor extensively associated with the therapy of type-2 diabetes mellitus. A controlled release of the drug in the gastrointestinal tract may aid in maintaining the therapeutic range for an extended period. Sodium alginate, pectin, and xanthan gum are commonly used as biopolymers in drug delivery with favourable biocompatibility and biodegradation.\u003c/p\u003e\u003ch2\u003eMaterials and method\u003c/h2\u003e \u003cp\u003eSodium alginate-pectin and sodium alginate-xanthan gum beads were developed to deliver vildagliptin. A calcium chloride ion (cacl2) induced ionic gelation technique was employed for synthesizing pH-sensitive beads by varying the ratio of sodium alginate, pectin, and xanthan gum.\u003c/p\u003e\u003ch2\u003eResults\u003c/h2\u003e \u003cp\u003eThe FTIR investigation verified that drugs and polymers are compatible. The developed beads were evaluated for scanning electron microscopic and DSC study, drug content, swelling ratio, and in-vitro dissolution study. The microscopic images exhibited some are in spherical and semi-spherical shaped beads with cracked and rough surfaces. A pH-dependent swelling was seen, indicating that water intake was restricted in an acidic medium and elevated in an alkaline pH environment. The in-vitro dissolution study demonstrated a controlled release of the drug. optimized formulation Exhibiting diffusion release.\u003c/p\u003e\u003ch2\u003eConclusion\u003c/h2\u003e \u003cp\u003eThe study reported the successful development of vildagliptin microspheres by using sodium alginate, pectin, and xanthan beads for controlled delivery of Vildagliptin.\u003c/p\u003e","manuscriptTitle":"Formulation and in-vitro Evaluation of Vildagliptin Microspheres Using Pectin and Xanthan Gum as Polymers","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-02-02 17:09:32","doi":"10.21203/rs.3.rs-3917925/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"3131d5d3-e98e-47af-950e-840d07b34721","owner":[],"postedDate":"February 2nd, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":28526287,"name":"Biopolymers"},{"id":28526288,"name":"Drug Delivery"}],"tags":[],"updatedAt":"2024-11-13T10:23:21+00:00","versionOfRecord":[],"versionCreatedAt":"2024-02-02 17:09:32","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-3917925","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-3917925","identity":"rs-3917925","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}