5[5]Lock A L.Seasonal variation in milk CLA and △9-desaturase activity in dairy cows[J].Livestock Production Science,2003,79:47-59.
6[6]Petersond G.Analysis ofvariation in c9,t11 -CLA inmilk fatofdiary cows[J].Journal of Dairy Science,2002,85 (2):164-217.
7[7]Kelly M L,Berry J R,Dwyer D A.Effect of intake of pasture on concentrations of conjugated linoleic acid in milk of lactating cows.[J].J Dairy Sci,1998,128:881-885.
8[8]Chouinard P Y.CLA content ofmilk from cows fed different sources of dietary fat[J].J Dairy Sci,1998,81:233.
6[1]Milner.Functional foods and health promotion[J].Nutr,1999,129:1 395-1 397.
7[2]Belury.Conjugated linoleic acid:A polyunsaturated fatty acid with unique chemoprotective properties[J].Nutr.Rev.,1995.53:83-89.
8[3]Klaus W.Wahle,Steven D.Heys.Conjugated linoleic acid:are they beneficial or detrimental to health? [J].Progress in lipid Resesrch,2004,43:553-587.
9[4]Dawson,P.Kemp.Biohydrogenation of dietary fats in ruminants[A].A.T.Phillipson(Ed.).Physiology of digestion and metabolism in the ruminant[C].1970.504-518.