Fatty acid composition of cow milk when activated zeolite and probiotics are included in their diet

Abstract

Relevance. The biosynthesis of milk fat is influenced by a large number of factors, including the feeding habits of animals.Methods. Milk samples were taken and prepared for analysis according to GOST 26809.1-2014. The fatty acid composition of the fatty phase of milk was determined by gas chromatography in accordance with GOST 32915-2014 on a gas chromatograph «Crystallux 4000M», capillary column SP2560.Results. Significantly the lowest content of stearic acid was observed in individuals of the second group — 11.362% (p ˂ 0.05). Animals of the second group had a significantly higher mass fraction of monounsaturated fatty acids: decenoic, myristooleic and palmitooleic — by 0.062% (p ˂ 0.05), and in terms of the content of myristooleic and palmitooleic acids — by 0.242% (p ˂ 0.05) and 0.159% (p ˂ 0.05), respectively. In animals of the second group, the content of polyunsaturated linoleic acid compared with the control was significantly lower by 0.385% (p ≥ 0.05). In general, it should be noted that the established mass fraction of stearic acid in the milk fat of animals of the third group was slightly higher, and palmitooleic acid in the milk of cows of all groups was slightly lower than the reference values provided for by GOST 32915-2014. The ratio of fatty acid methyl esters of milk fat in individuals of all groups corresponded to the permissible range of values according to GOST 32261-2013.