以不同体外模拟系统评价大豆蛋白的胃消化特性

采用静态消化模型和半动态消化模型，评价经透析处理和未经透析处理的大豆蛋白的胃消化特性。结果表明：在静态消化模型中，透析对大豆蛋白的胃消化过程没有影响；但在半动态消化模型中，未经透析的大豆蛋白pH值、排空内容物的干物质质量和游离氨基的含量与经透析处理的大豆蛋白存在一定差异，表明未经透析处理的大豆蛋白保留较多大豆中的成分，使其缓冲能力更强，胃排空滞后，蛋白质消化速率减慢。此外，静态消化模型和半动态消化模型有不同的优势，所以可以根据不同的研究目的采用不同的消化模型。这项工作将为大豆蛋白产品的开发和健康效应提供新的见解。

Evaluation the Gastric Digestion Properties of Soy Protein in Different in Vitro Simulation Systems

In this study, the gastric digestibility of dialyzed and non-dialyzed soybean protein was investigated using a static digestion model and a semi-dynamic digestion model. The results from the static model suggested that dialysis had no effect on the gastric digestion process of soy protein. However, in the semi-dynamic model, the pH, dry matter mass of emptied digesta and free amino group content of the non-dialyzed soy protein (SP-ND) differed somewhat from those of the dialyzed soy protein (SP-D) indicating that the SP-ND retained more components in soybeans, resulting in a greater buffering capacity, delayed gastric emptying and slower protein digestion. In addition, the static and semi-dynamic digestion models had different advantages, so they can be used for different research purposes. This work could provide new insights into the development and health effects of soy protein-based products.