Effects of heat treatment and stabilizing salts supplementation on the physicochemical properties, protein structure and salts balance of goat milk

文献类型： 外文期刊

第一作者： Zhao, Lili

作者： Zhao, Lili;Zhao, Lili;Zhang, Shuwen;Lu, Jing;Lv, Jiaping

作者机构：

关键词： Goat milk; Heat treatment; Stabilizing salts; Ultra-high temperature instantaneous sterilization (UHT); Turbiscan technique

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：4.952； 五年影响因子：5.383 ）

ISSN： 0023-6438

年卷期： 2020 年 132 卷

页码：

收录情况： SCI

摘要： This study investigated the effects of heat treatment and stabilizing salts on the physicochemical properties, protein structure and salt balance of goat milk. Heat treatment altered the quantity of sediment (peak width) and particle concentration (delta backscattering) of goat milk observed in Turbiscan spectrograms. A higher Turbiscan Stability Index, and greater sediment thickness and velocity were observed in UHT goat milk than in UHT cow milk, indicating poorer heat stability of goat milk than cow milk. The poor heat stability of goat milk might be caused by the heat-induced conversion from stretching structure (beta-sheet and beta-turn) to globurizing structure (random coil and alpha-helix) of protein, and changes in distributions of proteins (beta-CN, alpha(s1)-CN, alpha(s2)-CN, kappa-CN, beta-LG and alpha-LA), calcium and phosphorus between supernatant and sediment. Compared with UHT goat milk without stabilizing salts, the addition of stabilizing salts increased the amounts of calcium and phosphorus in the supernatant and decreased the amounts of sediment, protein particle size, and globular protein structure in UHT goat milk. This demonstrates that stabilizing salts can be used to improve the heat stability of goat milk.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序