Correlation between multi-scale structure and log-of-slope digestive kinetics of a novel slowly digestible starch: Self-assembled chempedak seed amylopectin ternary complex

文献类型： 外文期刊

第一作者： Li, Bo

作者： Li, Bo;Yang, Xin;Li, Bo;Tan, Lehe;Zhang, Yanjun;Zhang, Yutong;Zhang, Yutong;Zhang, Yutong;Li, Bo;Zhao, Yuan;Yao, Chunguang;Huang, Chongxing;Wang, Shuangfei;Niu, Debao

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关键词： Chempedak seed; Ternary complex; Slowly digestible starch; Chemometric analysis; Multi-scale structure

期刊名称：FOOD RESEARCH INTERNATIONAL （ 影响因子：8.0； 五年影响因子：8.5 ）

ISSN： 0963-9969

年卷期： 2025 年 220 卷

页码：

收录情况： SCI

摘要： Chempedak seeds are abandoned as a by-product, resulting in wasting starches, proteins, and lipids. Accordingly, the present research investigated the log-of-slope digestive kinetics of chempedak seed amylopectin (CPSS')-lauric acid (LA)-beta-lactoglobulin (beta LG) complex. Compared to that of CPSS', CPSS'-LA-beta LG complex amylopectin long chain was reduced, complexing index was 52.11 %, and crystalline structure exhibited Type-V + B. These results indicated that the enzymatic sites locating in the amylopectin long chain were encapsulated after complexation, thus, significantly increasing slowly digestible starch (SDS) content (40.23 %) in CPSS'-LA-beta LG complex compared to that in CPSS' (20.32 %). Moreover, CPSS'-LA-beta LG complex exhibited increased relative crystallinity, semicrystalline orderliness, lamella thickness, and molecular mass but reduced crystallite unit length. This led to a compact and smooth morphology compared with that of chempedak seed starch (CPSS)-LA-beta LG complex. Based on chemometric analysis, these factors led to higher SDS content, lower initial (2.23 x 10-2 min-1) and final digestion rate constants (1.43 x 10-2 min-1), and lower estimated glycemic index (81.07) in CPSS'-LA-beta LG complex than in CPSS-LA-beta LG complex (4.95 x 10-2 min-1, 1.99 x 10-2 min-1, and 84.14). It was also found that the different complexing sites and strong forces strong forces including hydrogen bonding, hydrophobic interactions, electrostatic attractions, and van der Waals enhance CPSS'-LA-beta LG complex enzyme resistance compared to that in maize, cassava and potato starch complex. Therefore, CPSS'-LA-beta LG complex could be considered as a well source to make foods for relieving the type II diabetes or hyperlipemia.

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