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Titolo:
Effect of vitamin E supplementation on alpha-tocopherol and beta-carotene concentrations in tissues from pasture- and grain-fed cattle
Autore:
Yang, A; Brewster, MJ; Lanari, MG; Tume, RK;
Indirizzi:
Food Sci Australia, Brisbane Lab, Tingalpa DC, Qld 4170, Australia Food Sci Australia Tingalpa Qld Australia 4170 pa DC, Qld 4170, Australia
Titolo Testata:
MEAT SCIENCE
fascicolo: 1, volume: 60, anno: 2002,
pagine: 35 - 40
SICI:
0309-1740(200201)60:1<35:EOVESO>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
BEEF COLOR STABILITY; DIETARY SUPPLEMENTATION; LIPID-PEROXIDATION; FAT COLOR; HOLSTEIN; ABSORPTION; OXIDATION; ACETATE; STEERS; MUSCLE;
Keywords:
vitamin E supplementation; pasture- and grain-fed beef; alpha-tocopherol; beta-carotene; fat colour;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Tume, RK Food Sci Australia, Brisbane Lab, POB 3312, Tingalpa DC, Qld 4170, Australia Food Sci Australia POB 3312 Tingalpa Qld Australia 4170 Australia
Citazione:
A. Yang et al., "Effect of vitamin E supplementation on alpha-tocopherol and beta-carotene concentrations in tissues from pasture- and grain-fed cattle", MEAT SCI, 60(1), 2002, pp. 35-40

Abstract

The effects of dietary vitamin E supplementation of grain-fed cattle on lipid oxidation and meat colour have been extensively investigated, but little attention has been given to pasture-fed. cattle where meat is likely to contain naturally high amounts of alpha -tocopherol and carotenoids. In the work described, we evaluated the effects of pasture-feeding alone and with vitamin E supplementation on tissue levels of anti-oxidants and compared the findings with those obtained for grain-fed cattle with and without supplementation. Sorghum was the major component of the grained-based ration. alpha -Tocopherol concentrations in plasma, muscle and fat tissues of pasture-fed cattle were not affected by vitamin E supplementation (2500 IU/head/dayfor 132 days prior to slaughter) while those of grain-fed cattle increasedsignificantly. The alpha -tocopherol concentrations in the supplemented grain-fed cattle were similar in muscle and liver to pasture-fed animals but were lower in their fat (P < 0.05). The major carotenoid present in all tissues studied from pasture-fed was beta -carotene and its contents in plasma., liver, fat and muscles were decreased (P < 0.05) by supplementation withvitamin E. Carotenoids were essentially absent in grain-fed cattle except for small amounts in liver. The implication of this study for the meat industry is that cattle grazed on good pasture can achieve concentrations of alpha -tocopherol in muscles and other tissues at least as high as those obtained by supra-nutritional supplementation of grain-fed cattle with vitamin E. However, alpha -tocopherol supplementation of pasture-fed cattle reducedtissue concentrations of beta -carotene, which would reduce carcase fat yellowness and make pasture-fed cattle more acceptable to some Asian markets. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 18:12:31