Physicochemical properties and digestibility of hydrothermally treated waxy rice starch

卷:172

Zeng, Feng ; Ma, Fei ; Kong, Fansheng ; Gao, Qunyu ; Yu, Shujuan

关键词: Annealing;    Heat-moisture treatment;    Slowly digestible starch;    Resistant starch;    Weight-average molar mass;   

DOI  :  10.1016/j.foodchem.2014.09.020

学科分类：食品科学和技术

【 摘 要 】

Waxy rice starch was subjected to annealing (ANN) and heat-moisture treatment (HMT). These starches were also treated by a combination of ANN and HMT. The impact of single and dual modifications (ANN-HMT and HMT-ANN) on the molecular weight (M-w), crystalline structure, thermal properties, and the digestibility were investigated. The relative crystallinity and short-range order on the granule surface increased on ANN, whereas decreased on HMT. All treated starches showed lower M-w than that of the native starch. Gelatinization onset temperature, peak temperature and conclusion temperature increased for both single and dual treatments. Increased slowly digestible starch content was found on HMT and ANN-HMT. However, resistant starch levels decreased in all treated starches as compared with native starch. The results would imply that hydrothermal treatment induced structural changes in waxy rice starch significantly affected its digestibility. (C) 2014 Elsevier Ltd. All rights reserved.