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Changes in microstructure and functional properties of papaya as affected by osmotic pre-treatment combined with freeze-drying

dc.contributor.authorUdomkun, Patchimaporn
dc.contributor.authorArgyropoulos, D.
dc.contributor.authorNagle, M.
dc.contributor.authorMahayothee, B.
dc.contributor.authorAlamu, E.O.
dc.contributor.authorMüller, J.
dc.date.accessioned2019-12-04T11:14:17Z
dc.date.available2019-12-04T11:14:17Z
dc.date.issued2018
dc.identifier.citationUdomkun, P., Argyropoulos, D., Nagle, M., Mahayothee, B., Alamu, E.O. & Muller, J. (2018). Changes in microstructure and functional properties of papaya as affected by osmotic pre-treatment combined with freeze-drying. Journal of Food Measurement and Characterization, 1-10.
dc.identifier.issn2193-4126
dc.identifier.urihttps://hdl.handle.net/20.500.12478/2715
dc.descriptionPublished online: 20 Jan 2017
dc.description.abstractFreeze-drying represents a very effective method to significantly prevent loss of nutrients, especially heat-sensitive compounds. Moreover, osmotic dehydration is frequently applied prior to drying in order to facilitate moisture removal and improve quality. In the present study, the effect of osmotic pre-treatment combined with freeze-drying at different working pressures on microstructure, colour, and functional properties such as carotenoid contents, total phenolic contents (TP) and antioxidant activity in papayas was investigated. Osmotic pretreatment prior to freeze-drying resulted in increased yellowness, apparent density, and solid density, while carotenoids, TP, and antioxidant activity were lower compared to untreated samples. SEM images clearly showed that the effect of working pressure on the characteristic of dried papaya structure. Samples dried at working pressure of 9 and 77 kPa showed higher deformation with large cavities and dense dry layer when compared with those at 28 kPa. In addition, samples were significantly higher in lightness, redness, colour difference, and porosity when the working pressure was applied at 9 kPa. A reduction of working pressure had a negative effect on the retention of carotenoids, TP, and antioxidant activity in freeze-dried samples. It can be concluded that 28 kPa of pressure better conserved bioactive compounds and minimised structural deformation.
dc.format.extent1-10
dc.language.isoen
dc.subjectDrying
dc.subjectPapaya
dc.subjectCarotenoids
dc.subjectAntioxidants
dc.subjectOsmotic
dc.subjectFreeze-Drying
dc.subjectPhenolics
dc.subjectBioactive Compounds
dc.titleChanges in microstructure and functional properties of papaya as affected by osmotic pre-treatment combined with freeze-drying
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpAgriculture for Nutrition and Health
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversität Hohenheim
cg.contributor.affiliationCentral State University
cg.contributor.affiliationSilpakorn University, Thailand
cg.coverage.regionEurope
cg.coverage.countryGermany
cg.creator.identifierAlamu Emmanuel Oladeji: 0000-0001-6263-1359
cg.creator.identifierPatchimaporn Udomkun: 0000-0003-0115-1997
cg.researchthemeNUTRITION & HUMAN HEALTH
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectBiodiversity
cg.iitasubjectNutrition
cg.journalJournal of Food Measurement and Characterization
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid93662
cg.targetaudienceScientists


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