College of Food Science and Engineering, Northwest A&F University, Yangling 712100, PR China.
College of Food Science and Engineering, Northwest A&F University, Yangling 712100, PR China.
Food Res Int. 2023 Jan;163:112263. doi: 10.1016/j.foodres.2022.112263. Epub 2022 Nov 30.
The effects of ball milling processing on the structure, physicochemical, and functional properties of insoluble dietary fiber (IDF) in bran from prosomillet, wheat and rice were investigated. Meanwhile, the effect of IDF on glucose tolerance and blood lipid levels in mice was evaluated as well. With findings, for all three grains, the particle sizes of IDF were significantly reduced after ball milling treatment (p < 0.05). Scanning electron microscopy revealed fragmented fiber with numerous pores and cracks. The reactive groups of three IDF samples were found to be similar by fourier transform infrared spectroscopy. And consistent with X-ray diffraction and thermal analysis, for all three grains, ball milling reduced the crystallinity of IDF and helped to increase the release of free phenol by 23.4 %, 8.9 %, and 12.2 %, respectively. Furthermore, the water holding capacity, glucose delay capacity, glucose, sodium cholate, and cholesterol adsorption capacity, and in vitro digestibility of starch and fat were all improved to varying degrees. Animal experiments showed that ball milling treatment effectively slowed the postprandial rise in blood sugar (especially IDF of rice bran) and blood lipids (especially IDF of prosomillet bran). As a result, ball milling treatment is a potential method for dietary fiber modification in the food industry.
研究了球磨处理对甜荞、小麦和稻米麸皮中不溶性膳食纤维（IDF）的结构、理化和功能特性的影响。同时，评价了 IDF 对小鼠葡萄糖耐量和血脂水平的影响。结果表明，对于这三种谷物，球磨处理后 IDF 的粒径均显著减小（p<0.05）。扫描电子显微镜显示纤维呈碎片状，有许多孔隙和裂缝。傅里叶变换红外光谱表明，三种 IDF 样品的反应基团相似。与 X 射线衍射和热分析一致，球磨处理降低了三种 IDF 的结晶度，并分别有助于增加游离酚的释放量 23.4%、8.9%和 12.2%。此外，持水力、葡萄糖延迟能力、葡萄糖、胆酸钠和胆固醇吸附能力以及淀粉和脂肪的体外消化率均得到不同程度的提高。动物实验表明，球磨处理能有效减缓餐后血糖升高（尤其是米糠 IDF）和血脂升高（尤其是甜荞麸皮 IDF）。因此，球磨处理是食品工业中膳食纤维改性的一种潜在方法。
