Characteristics of intramuscular fat quality in muscule longissima thoracis of slaughter steers
2002
Mojto, J. | Zaujec, K. | Novotna, K. (Vyskumny Ustav Zivocisnej Vyroby, Nitra (Slovak Republic))
We studied the content of intramuscular fat, and representation of individual fatty acids and content of cholesterol in it. We used 10 young slaughter steers, crosses of Holstein (75 %) x Blond d'Aquitaine from stable fattening in our experiment. We calculated also some important sets and indices of fatty acids. The average content of intramuscular fat in meat was 2.65 g per 100g and content of cholesterol 64.69 mg per 100 g. We determined totally 14 fatty acids of the series C10:0 up to C22:0. The most represented were the oleic acid (C18:1) 37.01 % and the palmitic acid (C16:1) 29.56 %. Out of the essential fatty acids we determined the presence of linoleic acid (C18:2) and linolenic acid (C18:3). Their proportion in the total content of fatty acids in intramuscular fat was 3.13 %. The saturated fatty acids were represented by 54.17 % and monounsaturated ones by 42.02 %. We calculated the index of unsaturation of fat (proportion of unsaturated and saturated fatty acids) I1 = 0.82 and index of nutritional value of fat (proportion of essential and saturated fatty acids) I2 = 0.06 to characterize the intramuscular fat quality in more details
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