天气预报 > 其他 > 牛奶大概在零下几度结冰
牛奶大概在零下几度结冰
更新时间: 2020-11-03 00:00:00  

牛奶的主要成份就是水,水的冰点是零度,牛奶的冰点低于水,平均为—O.5摄氏度左右。只是结冰的时间长短而以,温度越低结冰就越快。

牛奶结冰是由外向里发展的,牛奶结冰后,质量会受到严重影响,鲜奶中的蛋白质在冷冻条件下发生凝固,与奶中的脂肪分离,干酷素呈微粒状态分散于牛奶中。冰冻的牛奶经过加热溶化后,味道明显淡薄,奶液呈水样,营养价值降低。

关键词: 牛奶 大概 零下 结冰

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