Effect of Heat-Moisture Treatments on Digestibility and Physicochemical Property of Whole Quinoa Flour

文献类型： 外文期刊

第一作者： Dong, Jilin

作者： Dong, Jilin;Huang, Lu;Chen, Wenwen;Zhu, Yingying;Shen, Ruiling;Dong, Jilin;Shen, Ruiling;Dong, Jilin;Shen, Ruiling;Zhu, Yingying;Dun, Baoqing

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关键词： quinoa; flour; heat-moisture treatment; digestibility; physico-chemical property

期刊名称：FOODS （ 影响因子：5.561； 五年影响因子：5.94 ）

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年卷期： 2021 年 10 卷 12 期

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收录情况： SCI

摘要： The starch digestion processing of whole grain foods is associated with its health benefits in improving insulin resistance. This study modified the digestibility of whole quinoa flour (WQ) via heat-moisture treatment (HMT), HMT combined with pullulanase (HMT+P), HMT combined with microwave (HMT+M), and HMT combined with citric acids (HMT+A), respectively. Results showed that all the treatments significantly increased (p < 0.05) the total dietary fiber (TDF) content, amylose content, and resistant starch (RS) content, however, significantly decreased (p < 0.05) the amylopectin content and rapidly digestible starch (RDS) content of WQ. HMT+P brought the highest TDF content (15.3%), amylose content (31.24%), and RS content (15.71%), and the lowest amylopecyin content (30.02%) and RDS content (23.65%). HMT+M brought the highest slowly digestible starch (SDS) content (25.09%). The estimated glycemic index (eGI) was respectively reduced from 74.36 to 70.59, 65.87, 69.79, and 69.12 by HMT, HMT+P, HMT+M, and HMT+A. Moreover, a significant and consistent reduction in the heat enthalpy (Delta H) of WQ was observed (p < 0.05), after four treatments. All these effects were caused by changes in the starch structure, as evidenced by the observed conjunction of protein and starch by a confocal laser scanning microscope (CLSM), the decrease in relative crystallinity, and transformation of starch crystal.

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