Effects of potassium sulfate on swelling, gelatinizing and pasting properties of three rice starches from different sources

文献类型： 外文期刊

第一作者： Yang, Yongtao

作者： Yang, Yongtao;Xu, Xiaojuan;Wang, Qiang

作者机构：

关键词： Rice starch; Potassium sulfate; Gelatinization; Swelling; Pasting properties

期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：9.381； 五年影响因子：8.678 ）

ISSN： 0144-8617

年卷期： 2021 年 251 卷

页码：

收录情况： SCI

摘要： This study evaluates the effects of potassium sulfate (K2SO4) on the swelling, gelatinization, and pasting properties of indica rice starch (IRS), japonica rice starch (JRS), and waxy rice starch (WRS). As a result, the gelatinization temperatures (T-p), swelling capacities, and pasting viscosities of rice starches in water followed the order of WRS > JRS > IRS, showing positive correlations to amylopectin content and molecular weight. At K2SO4 concentration of 0.05-0.6 M, T-p increased by 10-13 degrees C due to a more compact structure of starch granules resulting from increased interactions of starch chains with K+. However, the swelling capacity decreased with increasing K2SO4 concentration and followed the order of WRS < JRS < IRS, which decreased sharply from 27.3 to 2.5 g/g for WRS. K2SO4 dramatically reduced the pasting viscosity of starch pastes due to the decreased swelling capacity. This study provides the scientific basis for rice starch processing with K2SO4.

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