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Dynamic Moisture Sorption Characteristics of Enzyme-Resistant Recrystallized Cassava Starch

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dc.contributor.authorChristopher Mutungi
dc.contributor.authorStefan Schuldt
dc.contributor.authorCalvin Onyango
dc.contributor.authorYvonne Schneider
dc.contributor.authorDoris Jaros
dc.contributor.authorHarald Rohm
dc.date.accessioned2024-07-10T17:41:37Z
dc.date.issued2011-01-24
dc.descriptionFull text article
dc.description.abstractThe interaction of moisture with enzymeresistant recrystallized starch, prepared by heat-moisture treatment of debranched acid-modified or debranched non-acid-modified cassava starch, was investigated in comparison with the native granules. Crystallinities of the powdered products were estimated by X-ray diffraction. Moisture sorption was determined using dynamic vapor sorption analyzer and data fitted to various models. Percent crystallinities of native starch (NS), non-acidmodified recrystallized starch (NAMRS), and acid-modified recrystallized starch (AMRS) were 39.7, 51.9, and 56.1%, respectively. In aw below 0.8, sorption decreased in the order NS > NAMRS > AMRS in line with increasing sample crystallinities but did not follow this crystallinity dependence at higher aw because of condensation and polymer dissolution effects. Adsorbed moisture became internally absorbed in NS but not in NAMRS and AMRS, which might explain the high resistance of the recrystallized starches to digestion because enzyme and starch cannot approach each other over fairly sufficient surface at the molecular level.
dc.description.sponsorshipDeutscher Akademischer Austauschdienst (DAAD)
dc.identifier.citationMutungi, C., Schuldt, S., Onyango, C., Schneider, Y., Jaros, D., & Rohm, H. (2011). Dynamic moisture sorption characteristics of enzyme-resistant recrystallized cassava starch. Biomacromolecules, 12(3), 660-671.
dc.identifier.urihttps://doi.org/10.1021/bm101321q
dc.identifier.urihttps://repository.nrf.go.ke/handle/123456789/1256
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subjectStarch Types
dc.subjectCrystallinity
dc.subjectMoisture Sorption
dc.subjectInternal Moisture Absorption
dc.titleDynamic Moisture Sorption Characteristics of Enzyme-Resistant Recrystallized Cassava Starch
dc.typeArticle
dspace.entity.typePublication

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