Published in Scientific Papers. Series D. Animal Science, Vol. LXVIII, Issue 2
Written by Tsvetelina DIMITROVA, Silviya IVANOVA, Tsvetomira BANCHEVA, Miroslav HRISTOV, Nikolay MARKOV
The studies were pooled sheep milks obtained from Karakachan sheep, pasture-raised without nutrition in the farm of the Research Institute of Mountain Stockbreading and Agriculture (RIMSA)-Troyan, Bulgaria. Samples of raw sheep milk for analysis were taken during the the months of April, May and June. Sheep yoghurt and local product “Katak” were produced from the pooled samples and the fatty acid content of the products was analysed by gas chromatography. Saturated fatty acids were found to decrease from 63.01 g/100 g in raw sheep's milk to 62.28 g/100 g in yoghurt on day 10. Monounsaturated fatty acids and polyunsaturated fatty acids predominated in the local product “Katak” - 29.54 g/100 g;7.0 g/100 g. The ratio of essential omega-6/omega-3 fatty acids is less than 5 according to health recommendations. The atherogenic index (AI) of milk fat is in the range-1.75-1.83, with a decrease from raw milk to dairy products, indicating that the products are healthier in terms of lipid content. Low trans fatty acid content was reported from 0.45 g/100 g in raw milk to 0.73 g/100 g product in sheep's yoghurt at day 10 and 0.92 g/100 g product in local product “katak”.
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