Dzen' Y. Dietary lipids transformation of feed in the organism of calves depending on age and under extruded concentrates feeding

The object is the investigation of intensity degradation and hydrogenation liberated C18-polyunsaturated fatty acids in the rumen fluid of calves, depending on age and under the extruded concentrates feeding, the influence of them on lipids content, their fatty acid composition, the ratio of individual lipids content in the rumen fluid, duodenum chyme, blood plasma, on the lipid synthesis in the skeletal muscles from different radioactive precursors. The aim of the work - the investigation of the peculiarities of lipids transformation and polyunsaturated fatty acids in the digestive tract and muscles of calves, depending on age and ander extruded concentrates feeding. The methods of research and equipment are biochemical, radiological, chromatograph, scintillation meter, spectrophotometer. Innovation - for the first time the data about the extent of degradation of lipids and hydrogenation liberateddismisal C18-polyunsaturated fatty acids in the concentrate feeds (extruded and unextruded) in the rumen of calves in the preruminant period and on the various stages of ruminant period were obtained. The results - the interrelation between increase of lipolytic activity, the decrease of triacylglycerols content, the increase of free fatty acids content and the intensification of hydrogenization of C18-polyunsaturated fatty acids in the rumen fluid of calves after transition from the preruminant type of digestion to ruminant type was established. It was shown that feeding of calves by mixed feed prepared from extruded compounds leads to the increase of triacylglycerols content and the decrease of free fatty acids content in the rumen fluid, to the increase of linoleic acid content in rumen fluid, duodenum chyme and blood plasma, to the increase of the intensity of lipid synthesis in the skeletal muscles from [1-14C]acetic acid and 3-phenyl-[1-14C]alanine in vitro. The inculcation - the results obtained will be used at the normalization of lipids feeding of calves from 1 till 6 month of age with aim increase intensity their growth. The sphere - biochemistry, physiology, feeding.