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| 23. |  | MERCÊS, E. da S.; SIQUEIRA, K. B.; GAMA, M. A. S. da. Percepção dos consumidores de Juiz de Fora-MG quanto à possível oferta de leite funcional com elevado teor de ácido linoleico conjugado (CLA). In: CONGRESSO INTERNACIONAL DO LEITE, 12.; WORKSHOP DE POLÍTICAS PÚBLICAS, 12.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 13., 2013, Porto Velho. Anais... Brasília, DF: Embrapa, 2013. 3 p. 1 CD-ROM.| Biblioteca(s): Embrapa Gado de Leite. |
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| 24. | | SIQUEIRA, K. B.; PINHO, M. C. de; GAMA, M. A. S. da; MERCÊS, E. da S. Relação custo-benefício de alguns produtos lácteos comparados com alimentos da cesta básica de Juiz de Fora. In: CONGRESSO INTERNACIONAL DO LEITE, 12.; WORKSHOP DE POLÍTICAS PÚBLICAS, 12.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 13., 2013, Porto Velho. Anais... Brasília, DF: Embrapa, 2013. 3 p. 1 CD-ROM.| Biblioteca(s): Embrapa Gado de Leite. |
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| 31. | | GAMA, M. A. S. da; OLIVEIRA, D. E.; FERNANDES, D.; SOUZA, J. de; BRUSCHI, J. H. An unprotected conjugated linoleic acid (CLA) supplement reduces milk fat synthesis and forage intake in lactating goats. In: INTERNATIONAL SYMPOSIUM ON RUMINANT PHYSIOLOGY, 11., 2009, Clermont-Ferrand. Ruminant physiology: digestion, metabolism, and effects of nutrition on reproduction and welfare: proceedings. Clermont-Ferrand: Wageningen Academic Publishers, 2009. p. 514-515.| Biblioteca(s): Embrapa Gado de Leite. |
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| 32. | | RIBEIRO, C. G. S.; LOPES, F. C. F.; GAMA, M. A. S. da; RODRIGUEZ, N. M.; GAMA, M. A. S. da; BARROS, P. A. V. DE; RIBEIRO, A. C. de C. L. Cinética de trânsito das fases líquida e sólida em vacas Holandês X Zebu recebendo dietas baseadas em capim-elefante picado suplementadas com níveis crescentes de óleo de soja. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 46., 2009, Maringá. Anais... Maringá: SBZ, 2009.| Biblioteca(s): Embrapa Gado de Leite. |
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| 33. | | BALDIN, M.; DRESCH, R.; SOUZA, F.; FERNANDES, D.; GAMA, M. A. S. da; HARVATINE, K. J.; OLIVEIRA, D. E. CLA induced milk fat depression reduced dry matter intake and improved energy balance in dairy goats. Small Ruminant Research, v. 116, n. 1, p. 44-50, 2014.| Biblioteca(s): Embrapa Gado de Leite. |
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| 34. | | LOPES, F. C. F.; SILVA, B. C. da M. e; ALMEIDA, M. M. de; GAMA, M. A. S. da. Lácteos naturalmente enriquecidos com ácidos graxos benéficos à saúde. In: MARTINS, P. do C.; PICCININI, G. A.; KRUG, E. E. B.; MARTINS, C. E.; LOPES, F. C. F. Sustentabilidade ambiental, social e econômica da cadeia produtiva do leite: desafios e perspectivas. Brasília, DF : Embrapa, 2015. p. 237-309| Biblioteca(s): Embrapa Gado de Leite. |
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| 36. | | MOTTA, E. F.; LIMA, L. L.; BARBOSA FILHO, H. G.; SALLES, M. F. O.; GAMA, M. A. S. da. Método analítico rápido para quantificação dos ácidos graxos das forragens por cromatografia gasosa. In: ENCONTRO NACIONAL SOBRE METODOLOGIAS E GESTÃO DE LABORATÓRIOS DA EMBRAPA, 19.; SIMPÓSIO SOBRE PROCEDIMENTOS ANALÍTICOS E A RASTREABILIDADE DOS RESULTADOS DA AGROPECUÁRIA, 6., 2014, Fortaleza, CE. Unir talentos para ultrapassar fronteiras. Fortaleza: Embrapa Agroindústria Tropical, 2014. p. 17.| Biblioteca(s): Embrapa Gado de Leite. |
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| 40. | | FERNANDES, D.; DRESCH, R.; BALDIN, M.; SOUZA, J. DE; GAMA, M. A. S. da; OLIVEIRA, D. E. DE. Efeito de doses do Ácido Linoleico Conjugado (CLA) sobre a concentração do CLA trans-10, cis-12 no leite e sua relação com o teor e a produção de gordura do leite de cabras leiteiras. In: Reunião Anual da Sociedade Brasileira de Zootecnia, 48., 2011, Belém. Anais...| Biblioteca(s): Embrapa Gado de Leite. |
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| Registros recuperados : 217 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
01/07/2013 |
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Data da última atualização: |
09/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
BALDIN, M.; GAMA, M. A. S. da; DRESCH, R.; HARVATINE, K. J.; OLIVEIRA, D. E. |
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Afiliação: |
M. BALDIN, UESC; MARCO ANTONIO SUNDFELD DA GAMA, CNPGL; R. DRESCH, UESC; K. J. HARVATINE, PENNSYLVANIA STATE UNIVERSITY; D. E. OLIVEIRA, UESC. |
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Título: |
A rumen unprotected conjugated linoleic acid supplement inhibits milk fat synthesis and improves energy balance in lactating goats. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Journal of Animal Science, v. 91, n. 7, p. 3305-3314, 2013. |
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DOI: |
https://doi.org/10.2527/jas.2012-5766 |
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Idioma: |
Inglês |
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Conteúdo: |
Feeding trans-10, cis-12 CLA supplements in a rumen-protected form has been shown to cause milk fat depression (MFD) in cows, ewes, and goats. Methyl esters of CLA were shown to be as effective as FFA in inducing MFD when infused postruminally, but their efficacy as a feed supplement has not been addressed in studies with lactating ruminants. In the present study, we investigated the effects of an unprotected trans-10, cis-12 CLA supplement as methyl esters on performance, milk composition, and energy status of dairy goats. Eighteen multiparous Toggenburg goats were randomly assigned to dietary treatments in a crossover experimental design (14 d treatment periods separated by a 7 d washout interval): 30 g/d of calcium salts of fatty acids (Control) or 30 g/d of a rumen unprotected CLA supplement containing 29.9% of trans-10, cis-12 CLA as methyl esters (CLA). Lipid supplements were mixed into a concentrate and fed individually to animals 3 times a day as a total mixed ration component. The DMI, milk yield, milk protein and lactose content and secretion, and somatic cell count were unaffected by CLA treatment. On the other hand, milk fat content and yield were reduced by 19.9 and 17.9% in CLA-fed goats. Reduced milk fat yield in CLA-fed goats was a consequence of a lower secretion of both preformed and de novo synthesized fatty acids. The CLA treatment also changed the milk fatty acid profile, which included a reduction in the concentration of SFA (2.5%), increased MUFA and PUFA (5.6 and 5.4%, respectively), and a pronounced increase (1576%) in milk fat trans-10, cis-12 CLA. Consistent with the high milk fat trans-10, cis-12 CLA content, all desaturase indexes were reduced in milk fat from CLA-fed goats. The MFD induced by CLA reduced the energy required for milk production by 22%, which was accompanied by an improvement in the estimated energy balance (P < 0.001), greater blood glucose concentration (P < 0.05), and a trend for increased BW (P = 0.08). Approximately 7.2% of trans-10, cis-12 CLA was estimated to escape from rumen biohydrogenation and indirect comparisons with data obtained from other studies suggest equivalent MFD between dietary CLA in the methyl ester form and rumen protected sources. Thus, despite the apparent low degree of rumen protection, our results suggest that methyl esters of CLA could be an alternative to rumen protected CLA supplements due to manufacturing and cost advantages. MenosFeeding trans-10, cis-12 CLA supplements in a rumen-protected form has been shown to cause milk fat depression (MFD) in cows, ewes, and goats. Methyl esters of CLA were shown to be as effective as FFA in inducing MFD when infused postruminally, but their efficacy as a feed supplement has not been addressed in studies with lactating ruminants. In the present study, we investigated the effects of an unprotected trans-10, cis-12 CLA supplement as methyl esters on performance, milk composition, and energy status of dairy goats. Eighteen multiparous Toggenburg goats were randomly assigned to dietary treatments in a crossover experimental design (14 d treatment periods separated by a 7 d washout interval): 30 g/d of calcium salts of fatty acids (Control) or 30 g/d of a rumen unprotected CLA supplement containing 29.9% of trans-10, cis-12 CLA as methyl esters (CLA). Lipid supplements were mixed into a concentrate and fed individually to animals 3 times a day as a total mixed ration component. The DMI, milk yield, milk protein and lactose content and secretion, and somatic cell count were unaffected by CLA treatment. On the other hand, milk fat content and yield were reduced by 19.9 and 17.9% in CLA-fed goats. Reduced milk fat yield in CLA-fed goats was a consequence of a lower secretion of both preformed and de novo synthesized fatty acids. The CLA treatment also changed the milk fatty acid profile, which included a reduction in the concentration of SFA (2.5%), increased MUFA and P... Mostrar Tudo |
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Palavras-Chave: |
Acido linoleico conjugado; Acidos graxos; Balanço energetico. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
Marc: |
LEADER 03177naa a2200217 a 4500
001 1961001
005 2024-02-09
008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.2527/jas.2012-5766$2DOI
100 1 $aBALDIN, M.
245 $aA rumen unprotected conjugated linoleic acid supplement inhibits milk fat synthesis and improves energy balance in lactating goats.$h[electronic resource]
260 $c2013
520 $aFeeding trans-10, cis-12 CLA supplements in a rumen-protected form has been shown to cause milk fat depression (MFD) in cows, ewes, and goats. Methyl esters of CLA were shown to be as effective as FFA in inducing MFD when infused postruminally, but their efficacy as a feed supplement has not been addressed in studies with lactating ruminants. In the present study, we investigated the effects of an unprotected trans-10, cis-12 CLA supplement as methyl esters on performance, milk composition, and energy status of dairy goats. Eighteen multiparous Toggenburg goats were randomly assigned to dietary treatments in a crossover experimental design (14 d treatment periods separated by a 7 d washout interval): 30 g/d of calcium salts of fatty acids (Control) or 30 g/d of a rumen unprotected CLA supplement containing 29.9% of trans-10, cis-12 CLA as methyl esters (CLA). Lipid supplements were mixed into a concentrate and fed individually to animals 3 times a day as a total mixed ration component. The DMI, milk yield, milk protein and lactose content and secretion, and somatic cell count were unaffected by CLA treatment. On the other hand, milk fat content and yield were reduced by 19.9 and 17.9% in CLA-fed goats. Reduced milk fat yield in CLA-fed goats was a consequence of a lower secretion of both preformed and de novo synthesized fatty acids. The CLA treatment also changed the milk fatty acid profile, which included a reduction in the concentration of SFA (2.5%), increased MUFA and PUFA (5.6 and 5.4%, respectively), and a pronounced increase (1576%) in milk fat trans-10, cis-12 CLA. Consistent with the high milk fat trans-10, cis-12 CLA content, all desaturase indexes were reduced in milk fat from CLA-fed goats. The MFD induced by CLA reduced the energy required for milk production by 22%, which was accompanied by an improvement in the estimated energy balance (P < 0.001), greater blood glucose concentration (P < 0.05), and a trend for increased BW (P = 0.08). Approximately 7.2% of trans-10, cis-12 CLA was estimated to escape from rumen biohydrogenation and indirect comparisons with data obtained from other studies suggest equivalent MFD between dietary CLA in the methyl ester form and rumen protected sources. Thus, despite the apparent low degree of rumen protection, our results suggest that methyl esters of CLA could be an alternative to rumen protected CLA supplements due to manufacturing and cost advantages.
653 $aAcido linoleico conjugado
653 $aAcidos graxos
653 $aBalanço energetico
700 1 $aGAMA, M. A. S. da
700 1 $aDRESCH, R.
700 1 $aHARVATINE, K. J.
700 1 $aOLIVEIRA, D. E.
773 $tJournal of Animal Science$gv. 91, n. 7, p. 3305-3314, 2013.
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