哈尔滨地区生鲜牛乳中嗜冷菌数量与蛋白酶酶活力关系的测定

Determination of the relationship between protease enzyme activity and number of psychrophilic bacteria in fresh milk in Harbin

对嗜冷菌产生的蛋白酶的活性进行了研究。原料生奶经过4℃贮藏,在贮藏0,12,20,28,36,44,48,52 h分别对牛奶取样测定嗜冷菌数量和其酶的活力,实验结果表明,在4℃下贮存44~48 h时嗜冷菌数量最多,蛋白酶活力最强。

The Heat-resistant lipases and proteinase produced by psychrotrophic bacteria was studied. After raw milk was stored at 4 ℃, the number of psychrotrophic bacteria enzyme activity were measure,d at 0 h, 12 h, 20 h, 28 h, 36 h, 44 h, 48 h, 52 h respectively .The results showed that the number and enzymic activity of psychrophilic bacteria could peak value when stored for 44-48 h at 4 ℃.