Influence of Convective Drying Temperatures on the Moisture Removal Kinetics and Physicochemical Characteristics of Japanese Persimmon (Diospyros kaki) Peel Powders

Influence of Convective Drying Temperatures on the Moisture Removal Kinetics and Physicochemical Characteristics of Japanese Persimmon (Diospyros kaki) Peel Powders | 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 Article Influence of Convective Drying Temperatures on the Moisture Removal Kinetics and Physicochemical Characteristics of Japanese Persimmon (Diospyros kaki) Peel Powders M. A. Reshaka Kavindi, Mohammad Hamayoon Wardak, Fanze Meng, Francis Ngwane Nkede, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6241491/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 Persimmon peel is an excellent source of antioxidants, phenolic compounds, and other phytochemicals, making it a valuable byproduct rather than a food waste. This study evaluates the effects of air-drying temperatures from 40 to 70°C on the drying kinetics, physico-chemical properties, color, yield, turbidity, particle morphology, thermal stability, functional groups, antioxidant capacity, and total phenolics of persimmon peel. Drying was conducted at air temperature between 40°C to 70°C with a constant air velocity of 2.7 ms − 1 . The results indicated that higher air temperatures led to a decrease in drying time with the process occurring primarily during the falling rate period. Seven thin-layer drying models were analyzed using the coefficient of determination and root mean square error, and the Weibull model was determined as the best fit for characterizing the drying kinetics of persimmon peel. The antioxidant capacity dropped while the overall phenolic content increased with higher drying temperatures. Although drying temperatures did not have a significant effect on morphological and functional characteristics and thermal stability, the color changes were noticeable. Despite the larger color changes, 60°C produced the optimum combination of antioxidant and phenolic chemicals. Biological sciences/Biotechnology Earth and environmental sciences/Environmental sciences Diospyros kaki peel Thin layer kinetics Phenolic compounds Radical scavenging activity Powder morphology Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6241491","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":439783584,"identity":"7a56bbc7-fc83-4db4-be05-7dd342f93b34","order_by":0,"name":"M. A. Reshaka Kavindi","email":"","orcid":"","institution":"Kyushu University","correspondingAuthor":false,"prefix":"","firstName":"M.","middleName":"A. 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This study evaluates the effects of air-drying temperatures from 40 to 70\u0026deg;C on the drying kinetics, physico-chemical properties, color, yield, turbidity, particle morphology, thermal stability, functional groups, antioxidant capacity, and total phenolics of persimmon peel. Drying was conducted at air temperature between 40\u0026deg;C to 70\u0026deg;C with a constant air velocity of 2.7 ms\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e. The results indicated that higher air temperatures led to a decrease in drying time with the process occurring primarily during the falling rate period. Seven thin-layer drying models were analyzed using the coefficient of determination and root mean square error, and the Weibull model was determined as the best fit for characterizing the drying kinetics of persimmon peel. The antioxidant capacity dropped while the overall phenolic content increased with higher drying temperatures. Although drying temperatures did not have a significant effect on morphological and functional characteristics and thermal stability, the color changes were noticeable. Despite the larger color changes, 60\u0026deg;C produced the optimum combination of antioxidant and phenolic chemicals.\u003c/p\u003e","manuscriptTitle":"Influence of Convective Drying Temperatures on the Moisture Removal Kinetics and Physicochemical Characteristics of Japanese Persimmon (Diospyros kaki) Peel Powders","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-04-15 15:45:16","doi":"10.21203/rs.3.rs-6241491/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":"34dd9447-8bb3-401c-9821-ab35d2fcaaeb","owner":[],"postedDate":"April 15th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":46818721,"name":"Biological sciences/Biotechnology"},{"id":46818722,"name":"Earth and environmental sciences/Environmental sciences"}],"tags":[],"updatedAt":"2025-04-23T04:08:29+00:00","versionOfRecord":[],"versionCreatedAt":"2025-04-15 15:45:16","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6241491","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6241491","identity":"rs-6241491","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}