文章基本信息

标题：The influence of Konjac glucomannan on the functional and structural properties of wheat starch
本地全文：下载
作者：Ling Zhang ; Lirong Zeng ; Xuan Wang 等
期刊名称：Food Science & Nutrition
电子版ISSN：2048-7177
出版年度：2020
卷号：8
期号：6
页码：2959-2967
DOI：10.1002/fsn3.1598
出版社：John Wiley & Sons, Ltd.
摘要：The aim of this study was to characterize the influence of Konjac glucomannan (KGM) on the functional and structural properties of wheat starch. Results showed that KGM significantly decreased the starch hydrolysis rate, with a lower level of rapidly digestible starch (RDS), and a higher content of slowly digestible starch (SDS). Besides, KGM decreased the content of leached amylose, while enhanced the swelling power, water‐holding capacity, freeze‐thaw stability, and paste clarity of wheat starch, which indicated a good improvement on the functional properties. Differential scanning calorimetry (DSC) and X‐ray diffraction patterns (XRD) manifested that the addition of KGM disrupted the original crystalline structures of wheat starch, which may result in the increased hydrolysis rate of starch. Interestingly, this did not consist with the decreased starch hydrolysis rate showed in the study. Moreover, FTIR results showed the existence of the interaction between KGM and starch. The morphological characterization demonstrated that the addition of KGM contributed to a more compact structure of freeze‐dried wheat starch. And KGM inhibited the expansion of starch granules and formed a barrier around the gelatinized starch. Therefore, the barrier around the starch granules and the interaction between KGM and starch were considered to be the important reasons that affected the starch digestibility.
关键词：crystalline structures;functional properties;Konjac glucomannan;leached amylose;starch hydrolysis rate;wheat starch