Vitkov M, Aiarov I, Pesheva R, Dimitrov T
Vet Med Nauki. 1983;20(1):61-7.
Studied was the extent to which lipolytic changes took place in milk in dependence on the subclinical diseases and the secretory alterations of the mammary gland in cows. A copper saponifying method was employed to determine the amount of the free fatty acids in the milk from the affected and normal quarters of a total of 60 cows. It was found that there was a definite correlation between subclinical mastitis and the extent up to which lipolytic changes took place in milk fats. The average content of the free fatty acids in the milk obtained from the diseased quarters of the under was 7.28 mg%, while the milk from the normal quarters contained them in an average amount of 3.96 mg%. In cows having secretory disturbances of the mammary gland there was certain rise of the free fatty acids as against the cows with normal quarters, however, the higher values were mathematically insignificant (P=0.1). It is believed that the lipolysis of milk fats is effected within the mammary gland as the result of the action of serum factors, and not of the effect of cellular lipase.
研究了奶牛乳汁中脂解变化程度与亚临床疾病以及乳腺分泌改变之间的关系。采用铜皂化法测定了60头奶牛患病乳腺区和正常乳腺区乳汁中游离脂肪酸的含量。结果发现，亚临床乳腺炎与乳脂中脂解变化程度之间存在明确的相关性。患病乳腺区乳汁中游离脂肪酸的平均含量为7.28毫克%，而正常乳腺区乳汁中游离脂肪酸的平均含量为3.96毫克%。乳腺分泌功能紊乱的奶牛，其游离脂肪酸含量相对于乳腺区正常的奶牛有一定程度的升高，然而，从统计学角度来看，较高的值并无显著差异（P = 0.1）。据信，乳脂的脂解作用是血清因子作用于乳腺内的结果，而非细胞脂肪酶的作用。
