title: Effect of antioxidants on oxidation during the production of whey fat concentrate.
abstract: Whey fat has a relatively high level of unsaturated fatty acids, and as such, whey products with a high fat content are vulnerable to oxidation. The purposes of the present study were to assess the oxidative development in whey fat concentrate (WFC) during production and investigate the effect of the addition of antioxidants. Green tea extract (GTE) or a mixture of ascorbyl palmitate and tocopherol (AP/TOC) were used, each in two concentrations. Samples were taken before and after pasteurization of WFC and after drying. The level of volatile oxidation products decreased during processing, while dityrosine concentrations increased during drying. GTE reduced oxidation in both unpasteurized and pasteurized WFC, while the effect of AP/TOC was nonsignificant. In the WFC powder, there was no significant effect of the antioxidants. In conclusion, results indicated that GTE was able to inhibit oxidation in WFC during production and that AP/TOC addition had no effect.
authors: Faculty of Science and Technology, Department of Food Science, Aarhus University, PO Box 50, DK-8830 Tjele, Denmark.
authors: Bente M
authors: BM
authors: Jensen
authors: John
authors: J
authors: Sørensen
authors: Grith
authors: G
authors: Mortensen
authors: Martin B
authors: MB
authors: Sørensen
authors: Trine K
authors: TK
authors: Dalsgaard
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D001205:Ascorbic Acid / Q000031:analogs & derivatives / Q000494:pharmacology; D028241:Camellia sinensis; D003611:Dairy Products; D005223:Fats / Q000737:chemistry*; D005511:Food Handling / Q000379:methods*; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000494:pharmacology; D024505:Tocopherols / Q000494:pharmacology
chemical_list: D000975:Antioxidants; D005223:Fats; D010936:Plant Extracts; D001205:Ascorbic Acid; C031226:6-O-palmitoylascorbic acid; D024505:Tocopherols