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Titolo:
Dose-response effect of dietary vitamin E concentration on meat quality characteristics in light-weight lambs
Autore:
Lopez-Bote, CJ; Daza, A; Soares, M; Berges, E;
Indirizzi:
Univ Complutense Madrid, Fac Vet, Dept Anim Prod, E-28040 Madrid, Spain Univ Complutense Madrid Madrid Spain E-28040 Prod, E-28040 Madrid, Spain UPM, ETSIA, Madrid 28040, Spain UPM Madrid Spain 28040UPM, ETSIA, Madrid 28040, Spain Prod Roche SA, Madrid, Spain Prod Roche SA Madrid SpainProd Roche SA, Madrid, Spain
Titolo Testata:
ANIMAL SCIENCE
, volume: 73, anno: 2001,
parte:, 3
pagine: 451 - 457
SICI:
1357-7298(200112)73:<451:DEODVE>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALPHA-TOCOPHEROL CONCENTRATION; E SUPPLEMENTATION; LIPID OXIDATION; BEEF; STABILITY; SHEEP; MICROSOMES; SLAUGHTER; KINETICS; TISSUES;
Keywords:
lamb (meat); lipid peroxidation; meat quality; alpha-tocopherol;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Lopez-Bote, CJ Univ Complutense Madrid, Fac Vet, Dept Anim Prod, E-28040 Madrid, Spain Univ Complutense Madrid Madrid Spain E-28040 adrid, Spain
Citazione:
C.J. Lopez-Bote et al., "Dose-response effect of dietary vitamin E concentration on meat quality characteristics in light-weight lambs", ANIM SCI, 73, 2001, pp. 451-457

Abstract

The research was carried out to evaluate the effect of different dietary alpha -tocopheryl acetate (DTA) concentrations in light-weight lambs on muscle alpha -tocopherol accumulation and on quality characteristics of stored meats. Thirty-two Manchego lambs were randomly distributed to four groups and given diets containing four levels of DTA (20, 270, 520 and 1020 mg/kg diet) for 6 weeks. Lambs were slaughtered at live weights ranging from 23(.)5 to 26(.)4 kg. A linear (P < 0.001) and quadratic (P < 0.001) effect of dietary supplementation level was observed on muscular alpha -tocopherol concentration, which fitted the following equation: mg muscle alpha -tocopherolper kg muscle = 1.78(s.e. 0(.)18) + 7(.)08 (s.e. 0(.)89)(1 - e(0.0012DTA))) (P < 0(.)001, R-2 = 0(.)99). There was a linear effect (P < 0(.)001) of muscle vitamin E concentration on thiobarbituric acid reactive substance on day 0 of storage, but a linear plus quadratic effect (P < 0(.)001) on days 3, 6 and 9. Broken Zinc analysis of data at day 9 of storage indicated a target muscle alpha -tocopherol concentration of 5(.)4 mg/kg. Evolution of surface redness of lamb chops also showed a linear and quadratic effect of dietary treatment on days 3 and 6 of storage, but only a linear effect on day9. Broken Zinc analysis of data at 3 and 6 days indicated a target alpha -tocopherol concentration in the range 5(.)3 to 5(.)6 mg/kg muscle for optimum red colour stability. Surface luminosity showed no effect of dietary treatment at days 0, 3 and 6 of storage but a linear (P < 0(.)01) plus quadratic (P < 0(.)05) effect on day 9 of storage. Broken line analysis at this point indicated a target muscle alpha -tocopherol concentration of 3(.)2 mg/kg. It is concluded that the effectiveness of dietary alpha -tocopheryl acetate supplementation depends on the meat quality attribute assessed. A significant positive effect for lipid oxidation can be reached even at the lowersupplementation level utilized in this experiment (270 mg/kg diet). However, considering the protecting effect at different storage times and particularly the effect on meat surface redness, the optimum level would be in therange 5(.)3 to 5(.)6 mg/kg muscle, which correspond to a dietary inclusionof 550 to 625 mg alpha -tocopheryl acetate/kg diet.

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Documento generato il 10/07/20 alle ore 08:55:58