Effects of Heat Moisture Treatment on Physicochemical Properties and Starch Digestibility of Rice Flours Differing in Amylose Content

Authors

  • Elvira Ruiiz
  • Khongsak Srikaeo Pibulsongkram Rajabhat University
  • Lucía Segovia de la Revilla

DOI:

https://doi.org/10.14456/fabj.2018.13

Keywords:

Rice flour, Heat moisture treatment, Physicochemical property, Starch digestion, Glycaemic index

Abstract

Rice flours from the varieties which differ in amylose content, Chai Nat 1 and KDML 105, were modified by heat moisture treatment (HMT). HMT condition was 25 g/100g moisture content and heating at 110ºC or 120ºC for 5 h. Both HMT treated rice flours were investigated for their morphology and physicochemical properties including starch digestibility. It was found that HMT induced the changes of HMT treated samples when compared to the native flours. Starch granules as observed by SEM images were more aggregated. Gelatinization temperatures as examined by a DSC were shifted to higher temperatures and a broader range. Inconsistent results were found for swelling and solubility. This could be the influence from other components, rather than starch, in the flours. In terms of digestibility, high amylose rice (Chai Nat 1) exhibited lower estimated glycaemic index (GI) than KDML 105. Within the same variety, HMT at the condition used in this study did not significantly affect starch digestion rate and GI values.

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Published

2018-07-25

How to Cite

Ruiiz, Elvira, Khongsak Srikaeo, and Lucía Segovia de la Revilla. 2018. “Effects of Heat Moisture Treatment on Physicochemical Properties and Starch Digestibility of Rice Flours Differing in Amylose Content”. Food and Applied Bioscience Journal 6 (3):140-53. https://doi.org/10.14456/fabj.2018.13.

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Section

Food Processing and Engineering