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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
07/04/2005 |
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Data da última atualização: |
07/04/2005 |
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Autoria: |
LÓPEZ-BOTE, C. J.; DAZA, A.; SOARES, M.; BERGES, E. |
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Título: |
Dose-response effect of dietary vitamin E concentration on meat quality characteristics in light-weight lambs. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Animal Science, v. 73, pt 3, p. 451-457, 2001 |
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Idioma: |
Inglês |
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Conteúdo: |
The research was carried out to evaluate lhe effect of different dietary a-tocopheryl acetate (DTA) concentrations in light-weight lambs on muscle a-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 leveI was observed on muscular a-tocopherol concentration, which fitted the following equation: mg muscle a-tocopherol per kg muscle = 1.78(s.e. 0.18) + 7-08 (s.e.0.89)(1 - e0.0012DTA (P < 0.001, R2 = 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 line analysis of data at day 9 of storage indicated a target muscle a- tocopherol concentration of 54 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 day 9. Broken line analysis of data at 3 and 6 days indicated a target a-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 a-tocopherol concentration of 3.2 mg/kg. It is concluded that lhe effectiveness of dietary a-tocopheryl acetate supplementation depends on the meat quality attribute assessed. A significant positive effect for lipid oxidation can be reached even at the lower supplementation leveI 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 leveI would be in the range 5.3 to 5.6 mg/kg muscle, which correspond to a dietary inclusion of 550 to 625 mg a-tocopheryl acetate/kg diet. MenosThe research was carried out to evaluate lhe effect of different dietary a-tocopheryl acetate (DTA) concentrations in light-weight lambs on muscle a-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 leveI was observed on muscular a-tocopherol concentration, which fitted the following equation: mg muscle a-tocopherol per kg muscle = 1.78(s.e. 0.18) + 7-08 (s.e.0.89)(1 - e0.0012DTA (P < 0.001, R2 = 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 line analysis of data at day 9 of storage indicated a target muscle a- tocopherol concentration of 54 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 day 9. Broken line analysis of data at 3 and 6 days indicated a target a-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)... Mostrar Tudo |
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Palavras-Chave: |
Peroxidade. |
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Thesagro: |
Carne; Cordeiro; Lipídio; Nutrição Animal; Ovino; Qualidade; Vitamina E. |
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Categoria do assunto: |
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Marc: |
LEADER 02901naa a2200253 a 4500
001 1531086
005 2005-04-07
008 2001 bl uuuu u00u1 u #d
100 1 $aLÓPEZ-BOTE, C. J.
245 $aDose-response effect of dietary vitamin E concentration on meat quality characteristics in light-weight lambs.
260 $c2001
520 $aThe research was carried out to evaluate lhe effect of different dietary a-tocopheryl acetate (DTA) concentrations in light-weight lambs on muscle a-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 leveI was observed on muscular a-tocopherol concentration, which fitted the following equation: mg muscle a-tocopherol per kg muscle = 1.78(s.e. 0.18) + 7-08 (s.e.0.89)(1 - e0.0012DTA (P < 0.001, R2 = 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 line analysis of data at day 9 of storage indicated a target muscle a- tocopherol concentration of 54 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 day 9. Broken line analysis of data at 3 and 6 days indicated a target a-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 a-tocopherol concentration of 3.2 mg/kg. It is concluded that lhe effectiveness of dietary a-tocopheryl acetate supplementation depends on the meat quality attribute assessed. A significant positive effect for lipid oxidation can be reached even at the lower supplementation leveI 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 leveI would be in the range 5.3 to 5.6 mg/kg muscle, which correspond to a dietary inclusion of 550 to 625 mg a-tocopheryl acetate/kg diet.
650 $aCarne
650 $aCordeiro
650 $aLipídio
650 $aNutrição Animal
650 $aOvino
650 $aQualidade
650 $aVitamina E
653 $aPeroxidade
700 1 $aDAZA, A.
700 1 $aSOARES, M.
700 1 $aBERGES, E.
773 $tAnimal Science$gv. 73, pt 3, p. 451-457, 2001
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| 1. |  | LEITE, F. L.; FERREIRA, F. C.; DA RÓZ, A. L.; CURVELO, A. A. S.; MATTOSO, L. H.; HERRMANN JUNIOR, P. S. P. Atomic force microscopy as a tool to evaluate sisal fibers used in polymer composites. In: LATIN AMERICAM SYMPOSIUM ON SCANNING PROBE MICROSCOPY, 3., 2005, Ouro Preto. [Anais eletrônicos...]. Ouro Preto: SBMN, 2005. 1 CD-ROM.| Biblioteca(s): Embrapa Instrumentação. |
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| 2. | | LEITE, F. L.; HERRMANN, P. S. P.; DA RÓZ, A. L.; FERREIRA, F. C.; CURVELO, A. A. S.; MATTOSO, L. H. C. Investigation of sisal fibers by atomic force microscopy: morphological and adhevise characteristics. Journal of nanoscience and nanotechnology, Stevenson Ranch, v. 6, n. 8, p. 2354-2361, 2006.| Biblioteca(s): Embrapa Instrumentação. |
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