Sedlyk A. Influence of age and fatty acids composition of fat supplement to diet on lipid metabolism in tissues of hens and their productivity

3. The object of the research: changes of lipid metabolism in tissues of hens in depend on age and fatty acids composition of fat supplement to mixed fodder. The aim of the work: to study of lipids classes content and intensity of their synthesis in vitro in tissues of hens in depend on age and influence of feeding of fat supplement with different content of n-3 and n-6 PUFA to mixed fodder of laying hens on this indexes, lipids and fatty acids composition of eggs, egg productivity. The methods of researches and equipment: biochemical and radiological, liquid scintilator counter, gas-liquid chromatography, spectrofotometr. Theoretical and practical results, novelty: it was established that intensity of phospholipids, triacylglycerols and cholesterol synthesis in most tissues of hens from [1-14C]acetic and [1-14C]palmitic acids conciderably increases from 60- to 180-days old age. The intensity of triacylglycerols synthesis in liver, breast muscle decreases, and the intensity of phospholipids synthesis increases respectively after feeding to hens sunflower seed oil and especially ?Vitatec? preparation. The content of long-chain n-3 PUFA increases, the content of cholesterol - decreases in yolk lipids, laying hens egg productivity was on 11% higher after feeding to hens ?Vitatec? preparation. Degree of introduction, the sphere of utilization: in poultry farming for PUFA enriched eggs obtaining