数字农科院2.0

Enhancing Structural Stability and Reducing Glycemic Response in Sweet Potato Starch Gels: Chitosan and Xanthan Gum via Electrostatic Interactions and Hydrogen Bonding

文献类型: 外文期刊

作者: Hussain, Pasdar;Zhang, Miao;Zhang, Ling;Sun, Hongnan;Gao, Feihu;Mu, Taihua

作者机构:

关键词: sweet potato starch gels;polysaccharides;structure;rheology;in vitro digestibility

期刊名称: ACS FOOD SCIENCE & TECHNOLOGY

ISSN:

年卷期: 2025 年

页码:

收录情况: ESCI(2025版)

摘要: To develop sweet potato starch (SPS) gels with high stability and a low estimated glycemic index (eGI), effects of xanthan gum (XG), carboxymethyl cellulose (CMC), chitosan (CHI), microcrystalline cellulose (MCC), and polydextrose (PDX) on the structure, rheological properties, moisture distribution, and in vitro digestibility of SPS gels were investigated. Rheological analysis revealed a significantly reduced z ' value of XG, CMC, CHI, and MCC, while it revealed an increased K value of fresh SPS gels, suggesting stable network formation. Fourier transform infrared (FTIR) spectra demonstrated that CHI presented the highest R 1047/1022 value (1.80) and the lowest R 1022/995 value (0.43) after retrogradation, followed by XG, suggesting more ordered structures. CHI yielded the lowest eGI (50.54) in retrograded gels, whereas XG led to a lower eGI in both fresh (55.34) and retrograded (54.17) states. This difference might be attributed to electrostatic interactions and hydrogen bonding between CHI and SPS, as well as strong hydrogen bonds between XG and SPS. These findings highlight CHI and XG as promising choices for designing functional starch-based foods.

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