Variability of unsaturated fatty acids in milk from different farms of the Czech Republic
2010
Hejtmankova, A.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Chemie | Taborsky, J.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Chemie | Dragounova, H.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Kvality Zemedelskych Produktu | Novotny, O.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Chemie
Milk samples from seven farms and one dairy plant were analyzed during the period of two years. The total fat content and the composition of fatty acids in milk fat were determined. In comparison with other breeds, the milk of Jersey cows had a significantly lower percentage of unsaturated fatty acids except for palmitoleic acid, and significantly higher percentage of palmitic acid. The mean percentage of monounsaturated fatty acids in total fatty acid content in milk fat was 27.70+/-2.74% for farms F1-F6 (F1, F6 - Holstein breed x Czech Spotted Cattle; F2 - Czech Spotted Cattle; F3, F4, F5 - Holstein breed) and 22.16+/-0.86% for F7 (Jersey breed), and of polyunsaturated fatty acids was 2.53+/-0.36% for F1-F6 and 1.93+/-0.22% for F7. The mean percentage of selected unsaturated fatty acids in milk fat were as follows (F1-F6 and F7, resp.): oleic acid 25.06+/-2.84% and 19.78+/-0.85%, linoleic acid 2.16+/-0.31% and 1.70+/-0.18%, linolenic acid 0.33+/-0.08% and 0.22+/-0.05%. Breed and breeding conditions were the main factors influencing milk fat content and composition, seasonal variations were less significant. The composition of fatty acids in milk fat was closely related to the total fat content.
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