In vitro starch digestion and physicochemical properties of maize starch and maize meal modified by heat-moisture treatment and stearic acid

dc.contributor.authorAsare, Isaac Kwabena
dc.contributor.authorMapengo, Clarity Ropafadzo
dc.contributor.authorEmmambux, Mohammad Naushad
dc.contributor.emailnaushad.emmambux@up.ac.zaen_US
dc.date.accessioned2022-12-02T05:15:48Z
dc.date.available2022-12-02T05:15:48Z
dc.date.issued2021-03
dc.description.abstractThe physicochemical and nutritional properties of heat-moisture treated (HMT) maize starch and maize meal with stearic acid (SA) are studied. The addition of SA followed by HMT produces nongelling starch and maize meal porridge with reduced pasting viscosity. Heat-moisture treatment significantly (P ≤ 0.05) decreases the starch hydrolysis, increases resistant starch, and lowers estimated glycaemic index of both maize meal and maize starch with SA. These changes are due to a more organized crystalline structure between starch polymers and well as the formation of amylose–lipid complexes as shown by differential scanning calorimeter and X-ray diffraction. There seems to be a synergistic effect between HMT and stearic addition as HMT promotes more starch polymer interaction compared to amylose–lipid formation for stearic acid addition. These results suggest that HMT combined with SA can be used to manufacture starch-based functional ingredients and foods with reduced glycaemic index.en_US
dc.description.departmentConsumer Scienceen_US
dc.description.departmentFood Scienceen_US
dc.description.librarianhj2022en_US
dc.description.urihttps://onlinelibrary.wiley.com/journal/1521379xen_US
dc.identifier.citationAsare, I.K., Mapengo, C.R. & Emmambux, M.N. 2021, 'In vitro starch digestion and physicochemical properties of maize starch and maize meal modified by heat-moisture treatment and stearic acid', Starch, vol. 73, no. 3-4, art. 2000128, pp. 1-9, doi : 10.1002/star.202000128.en_US
dc.identifier.issn0038-9056 (print)
dc.identifier.issn1521-379X (online)
dc.identifier.other10.1002/star.202000128
dc.identifier.urihttps://repository.up.ac.za/handle/2263/88594
dc.language.isoenen_US
dc.publisherWileyen_US
dc.rights© 2021 Wiley-VCH GmbH. This is the pre-peer reviewed version of the following article : 'In vitro starch digestion and physicochemical properties of maize starch and maize meal modified by heat-moisture treatment and stearic acid', Starch, vol. 73, no. 3-4, art. 2000128, pp. 1-9, 2021, doi : 10.1002/star.202000128. The definite version is available at : https://onlinelibrary.wiley.com/journal/1521379x.en_US
dc.subjectHeat-moisture treated (HMT)en_US
dc.subjectStearic aciden_US
dc.subjectMaize starchen_US
dc.subjectMaize mealen_US
dc.titleIn vitro starch digestion and physicochemical properties of maize starch and maize meal modified by heat-moisture treatment and stearic aciden_US
dc.typePostprint Articleen_US

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