Author:
Christodoulopoulos Georgios,Solomakos Nikolaos,Katsoulos Panagiotis D,Minas Anastasios,Kritas Spyridon K
Abstract
We examined the heat stability, somatic cell count (SCC), pH, fat, protein and lactose content of milk from goats during the oestrous period, in order to investigate evidence of possible oestrus effects on milk physical and chemical properties. Goats free from mammary infections were ranked on average SCC from three tests so that they could be stratified randomly in pairs to synchronized oestrus or left as unsynchronized non-oestrus controls. The synchronisation consisted of insertion of an intravaginal progesterone-releasing device for 17 d, and introduction of the bucks the day of the device removal (D0). The repeated measurements analysis of variance model included the fixed effects of the experimental group (oestrus or control) and day and the corresponding interaction and also the random effect of doe. Reduced milk-heat stability, increased SCC, increased protein content and reduced pH were found in the milk samples of the oestrus group on D1, 2 and 3. The fat and lactose content of the milk was not affected by oestrus. These data indicate that the milk of goats during the mating period has reduced heat stability and, therefore, that dilution into bulk tanks should be recommended to avoid clotting when milk is intended for high thermal treatment.
Publisher
Cambridge University Press (CUP)
Subject
Animal Science and Zoology,General Medicine,Food Science
Reference25 articles.
1. Effects of high pressure and heat treatment on the mineral balance
of goats' milk
2. Studies on native proteinase activity in milk (native proteinases in milk);Manjunath;Indian Journal of Dairy Science,1990
3. The stability of goat's milk to UHT processing;Zadow;Australian Journal of Dairy Technology,1983
4. Heat stability characteristics of ovine, caprine and equine milks
5. Some factors affecting heat stability of goat milk;Mukherjee;Indian Journal of Dairy Science,1993
Cited by
17 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献