Shao Yelin, Jiao Ruize, Wu Yingyin, Xu Fangcheng, Li Yan, Jiang Qiaojun, Zhang Liang, Mao Linchun
College of Biosystems Engineering and Food Science, Zhejiang Key Laboratory of Agro-Food Processing, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs Zhejiang University Hangzhou China.
Department of Agriculture and Biotechnology Wenzhou Vocational College of Science and Technology Wenzhou China.
Food Sci Nutr. 2023 Jan 8;11(3):1499-1506. doi: 10.1002/fsn3.3189. eCollection 2023 Mar.
Protein-starch interaction has an important impact on the properties of starchy foods rich in protein, but the contribution of the interaction to Chinese yam still remains unclear. This study aimed to characterize the physicochemical and functional properties related to the possible interaction between starch and protein in Chinese yam. Differential scanning calorimetry and rapid viscosity analyzer results revealed that the gelatinization temperature increased in protein and starch cross-linked powder, while the peak viscosity and the setback viscosity decreased. The swelling power and solubility at 80°C and 95°C decreased with increasing protein ratio in the powder. In vitro starch digestibility test indicated that a high protein ratio could rapidly reduce digestible starch, but increase both slowly digestible starch and resistant starch. Protein could act as the physical barrier toward starch against heating and digestion to exert the influence on starch properties. Fourier transform infrared spectroscopy test revealed the interaction between protein and starch. These results revealed the role of protein-starch interaction and provided beneficial information for the utilization of Chinese yam.
蛋白质-淀粉相互作用对富含蛋白质的淀粉类食品的性质有重要影响，但这种相互作用对山药的贡献仍不清楚。本研究旨在表征与山药中淀粉和蛋白质之间可能的相互作用相关的物理化学和功能特性。差示扫描量热法和快速粘度分析仪结果表明，蛋白质和淀粉交联粉末的糊化温度升高，而峰值粘度和回生粘度降低。粉末中蛋白质比例增加时，80°C和95°C下的膨胀力和溶解度降低。体外淀粉消化率测试表明，高蛋白比例可迅速降低可消化淀粉，但会增加慢消化淀粉和抗性淀粉。蛋白质可作为淀粉抵御加热和消化的物理屏障，从而对淀粉性质产生影响。傅里叶变换红外光谱测试揭示了蛋白质与淀粉之间的相互作用。这些结果揭示了蛋白质-淀粉相互作用的作用，并为山药的利用提供了有益信息。
