Effect of a-tocopherol tissue levels on beef quality.
To evaluate meat quality of beef with different ?-tocopherol tissue levels, 55 feedlot steers were fed a barley-based finisher diet with four vitamin E supplementation levels (0, 350, 700 and 1400 IU DL-?-tocopheryl acetate/animal per day) for 120 days. Although the increase in oxidation levels overtime was much smaller (P < 0.001) in the high-medium and high groups, ?-tocopherol tissue levels did not affect (P > 0.05) pH, proximate analysis, drip and cooking losses, and shear force of steaks. No effect of ?-tocopherol tissue levels was found in retail evaluation of steaks after a short ageing time of 6 days, but with 21 days of ageing, a delay in formation of metmyoglobin (P = 0.008) was observed in steaks with higher tissue levels of ?-tocopherol. Similar results were found for ground beef (25% fat) prepared from 6-day aged meat. Thus, higher ?-tocopherol tissue levels protect ground beef and long-aged steaks from discolouration and lipid oxidation.
Auteurs principaux: | , , , , , |
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Autres auteurs: | |
Format: | Artigo de periódico biblioteca |
Langue: | Ingles English |
Publié: |
2011-08-23
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Sujets: | Ageing, Tenderness, beef, vitamin E, |
Accès en ligne: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/898506 |
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