Oxidative stability and alpha-tocopherol retention in turkey burgers during refrigerated and frozen storage as influenced by dietary alpha-tocopheryl acetate.
1. The effect of vitamin E (alpha-tocopheryl acetate) in turkey diets on the oxidative stability of raw and cooked turkey burgers and on the retention of alpha-tocopherol during refrigerated (4 degrees C) or frozen (-20 degrees C) storage was investigated. One hundred and two, one-day-old T-8s turkey poults were divided at random into 3 groups of 34 animals each and fed on either a basal diet (normal commercial turkey diet) supplemented with 20 mg alpha-tocopheryl acetate/kg (control) or fed an alpha-tocopherol supplemented diet containing 300 (E300) or 600 (E600) mg alpha-tocopheryl acetate/kg for 21 weeks. 2. Dietary supplementation with alpha-tocopheryl acetate significantly reduced TBARS numbers in both raw and cooked burgers during refrigerated and frozen storage. 3. The mean values of alpha-tocopherol in raw and cooked burgers stored at 4 degrees C did not change during storage. 4. In the case of both raw and cooked samples stored at -20 degrees C, the alpha-tocopherol values decreased from 5.67 to 3.54 and from 3.56 to 2.30 micrograms/g in the raw burgers from turkeys from the E600 and E300 treatments, respectively, after 4 months storage. The values decreased from 5.60 to 2.88 and from 3.29 to 1.85 micrograms/g in cooked burgers from turkeys from the E600 and E300 treatments, respectively, after 5 months storage.
Wen
J
J
Department of Nutrition, University College, Cork, Ireland.
Morrissey
P A
PA
Buckley
D J
DJ
Sheehy
P J
PJ
D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000662:veterinary; D004032:Diet / Q000662:veterinary*; D004305:Dose-Response Relationship, Drug; D005527:Food, Fortified; D005615:Freezing; D050356:Lipid Metabolism; D008460:Meat / Q000032:analysis* / Q000592:standards; D010084:Oxidation-Reduction; D011897:Random Allocation; D012034:Refrigeration; D013696:Temperature; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis / Q000378:metabolism; D013997:Time Factors; D024505:Tocopherols; D014422:Turkeys; D014810:Vitamin E / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000032:analysis* / Q000378:metabolism* / Q000494:pharmacology; D024502:alpha-Tocopherol / Q000031:analogs & derivatives*
D017392:Thiobarbituric Acid Reactive Substances; D014810:Vitamin E; D024502:alpha-Tocopherol; D024505:Tocopherols