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A COMPARISION BETWEEN FATTY ACIDS RELEASED BY LIPOPROTEIN LIPASE AND PSYCHROPHILIC BACTERIAL LIPASES IN COW MILK | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 40, Issue 2, 2009, Pages 103-110 | ||
| Authors | ||
| ; A.M.A. SALIH; K.S. DOOSH | ||
| Abstract | ||
| This investigation was aimed to evaluate the effect of Lipoprotein Lipase (LPL) and psychrophillic bacterial lipases on fatty acids liberation in cow's milk .Two treatments were undertaken, the first included storing a sample of raw milk produced under aseptic conditions at 4 ± 2 Cº for 4 days. The second, comprised addition of psychrophillic bacterial suspensions to pasteurized milk that stored at 4 ± 2 Cº for 4 days. The obtained results revealed that LPL in raw milk hydrolyzed preferably short chain fatty acids, C4, C6 and C8, as well as, long chain fatty acids C18 and C18=1. While, the psychrophillic bacterial lipases treatment, released preferably medium chain fatty acids, C10, C12, C14 and C16. These result’s proposed that LPL attacked ester bond at position 1 and 3 on triglyceride ( TG ) and bacterial lipase attacked ester bond at position 2.The result’s also showed that Acid Degree value ( ADV) for pasteurized milk inoculated with psychrophilic bacterial suspension was higher than that for raw milk produced under hygienic conditions during all period storage. | ||
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