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Studies in the secretion of milk fat. 2. The effect of inanition on the yield and composition of milk fat



Studies in the secretion of milk fat. 2. The effect of inanition on the yield and composition of milk fat



Biochem. J 32: 1868-1876



From the 3 cows referred to in Abst. 4810, Vol. 8, milk samples were taken daily for analysis before, during and after the period of inanition. Contrary to the findings in relation to blood lipoids, considerable changes were found in the milk fat during inanition. There was a very marked drop in the total daily yield of milk fat and this was accompanied by a change in the composition of the fat. There was a decrease of about 80 per cent, from the original content of lower acids up to and including C14, and this was almost entirely made good by an increase in oleic acid. This change is discussed in the light of the three main possibilities as to the source of these lower fatty acids in butterfat and a fourth possibility is suggested. A new procedure has been devised for use in the fractional distillation of butterfat. This avoids the lengthy steam distillation used in the method of Hilditch and Thompson (Abst. 1482, Vol. 6).

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Accession: 013512199

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PMID: 16746821


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