UTJECAJ GODIŠNJEG DOBA NA SASTAV MASNIH KISELINA I SADRŽAJ KONJUGACIJSKE LINOLNE KISELINE U MLIJEKU

The purpose of the research was to determine the fatty acid composition of milk of common breeds in Hungary that is Hungarian Simmenthal, Red Holstein Friesian and Black Holstein Friesian and the changes in the fatty acid composition of their milk fat throughout the year with special respect to the conjugated linoleic acid content. The amount of unsaturated fatty acids (oleic acid, linoleic acid and linolenic acid) including conjugated linoleic acid was higher in summer than in winter. In the case of the saturated fatty acids (butyric acid, caproic acid, caprylic acid, capric acid, myristic acid, palmitic acid and stearic acid) the opposite tendency was shown. The amount of conjugated linoleic acid ranged from 0.8 to 1.4%, with an average value of 1.1%.Svrha ovog istraživanja bila je odrediti sastav masnih kiselina u mlijeku glavnih pasmina u Mađarskoj, tj. mađarskog simentalca, crvenog holsteinfrizijca, i crnog holstein-frizijca, te promjene u sastavu masnih kiselina u njihovom mlijeku tijekom godine, osobito s obzirom na sadržaj konjugacijske linolne kiseline. Količina nezasićenih masnih kiselina (oleinska kiselina, linolna kiselina i linolenska kiselina) uključujući linolnu konjugacijsku kiselinu bila je veća ljeti nego zimi. U slučaju zasićenih masnih kiselina (maslačna kiselina, kaprinska kiselina, kaprilna kiselina, kapronska kiselina, miristinska kiselina, palmitinska kiselina, te stearinska kiselina) tendencija je bila suprotna. Količina konjugacijske linolne kiseline kretala se od 0,8 do 1,4% s prosječnom vrijednosti od 1,1%