title: Effects of high pressure treatment and temperature on lipid oxidation and fatty acid composition of yak (Poephagus grunniens) body fat.
abstract: Effects of high-pressure treatment (100 MPa to 600 MPa) on lipid oxidation and composition of fatty acids in yak body fat at 4 °C and 15 °C were investigated for up to 20 days storage. 400 and 600 MPa treatments increase the level of thiobarbituric acid-reactive substances (TBARS) 335% and 400% (p<0.05), respectively. Composition analysis shows that 600 MPa treatment induces a lower (p<0.05) percentage of polyunsaturated fatty acids, and C22:6 decreased significantly. A significant decrease in PUFA/SFA and n-6/n-3 PUFA values was observed at the end of storage. Samples treated at the lower pressures gave good sensory acceptability. It is concluded that a higher-pressure treatment is important in catalyzing lipid oxidation and the evolution of fatty acids in pressure-treated yak body fat.
authors: Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, PR China. gogo1443@sina.com
authors: Qiang
authors: Q
authors: Wang
authors: Xin
authors: X
authors: Zhao
authors: Yanrong
authors: Y
authors: Ren
authors: Enguo
authors: E
authors: Fan
authors: Haijun
authors: H
authors: Chang
authors: Hongbin
authors: H
authors: Wu
mesh_terms: D000273:Adipose Tissue / Q000737:chemistry*; D000818:Animals; D002417:Cattle; D003258:Consumer Behavior; D004032:Diet; D004041:Dietary Fats / Q000032:analysis; D015525:Fatty Acids, Omega-3 / Q000032:analysis; D043371:Fatty Acids, Omega-6 / Q000032:analysis; D005231:Fatty Acids, Unsaturated / Q000032:analysis*; D005260:Female; D005511:Food Handling / Q000379:methods*; D006801:Humans; D015227:Lipid Peroxidation; D008297:Male; D008460:Meat / Q000032:analysis*; D011312:Pressure; D013696:Temperature; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism
chemical_list: D004041:Dietary Fats; D015525:Fatty Acids, Omega-3; D043371:Fatty Acids, Omega-6; D005231:Fatty Acids, Unsaturated; D017392:Thiobarbituric Acid Reactive Substances