Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.

Detalhes bibliográficos
Autor(a) principal: GAMA, M. A. S.
Data de Publicação: 2008
Outros Autores: GARNSWORTHY, P. C., GRIINARI, J. M., LEME, P. R., RODRIGUES, P. H. M., SOUZA, L. W. O., LANNA, D. P. D.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/596411
https://doi.org/10.1016/j.livsci.2007.08.006
Resumo: This experiment was designed to examine changes in milk fatty acids during fish oil-induced milk fat depression (MFD) and to test the theory that these changes are related to milk fat fluidity. The experiment was divided into three periods: 1) Baseline: all cows (n = 12) received a high fiber diet without fish oil (FO) for 12 days; 2) Treatment: 4 cows/group received the following treatments for 21 days: a) Low fiber diet without FO (LF), b) High fiber diet + FO (HF + FO) and c) Low fiber diet + FO (LF + FO); 3) Post-treatment: cows returned to the baseline diet and were monitored for 12 days. FO was included at 1.6% DM and HF and LF diets had 40 and 26% NDF, respectively. Milk fat content and yield were unchanged by the LF diet, but were reduced by FO diets at both dietary fiber levels and recovered in the post-treatment period. FO diets caused a pronounced reduction in stearic and oleic acid concentrations in milk fat and an equally pronounced increase in trans-18:1 fatty acid concentrations. Milk fat mean melting point (MMP) was correlated with MFD (r = 0.73) and with milk oleic acid concentration (r = − 0.92). The ratio of oleic:stearic in milk fat increased gradually and consistently in response to FO. Trans-C18:1 isomers with double bounds at carbon ≤ 10 increased with greater MFD and those with double bonds at carbon ≥ 11 decreased with greater MFD. Trans-9 cis-11 CLA explained more than 80% of MFD and was strongly correlated with trans-10 C18:1. Maintenance of MMP below 39–40 °C suggests that the mammary gland was able to secrete only milk fat with adequate fluidity and that MFD could be an adaptation mechanism to prevent secretion of milk with higher MMP.
id EMBR_c72d38f45b798c79323e8e6e2789a603
oai_identifier_str oai:www.alice.cnptia.embrapa.br:doc/596411
network_acronym_str EMBR
network_name_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository_id_str 2154
spelling Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.Fish oilMilk fat depressionTrans-fatty acidsConjugated linoleic acidsMilk fat fluidityThis experiment was designed to examine changes in milk fatty acids during fish oil-induced milk fat depression (MFD) and to test the theory that these changes are related to milk fat fluidity. The experiment was divided into three periods: 1) Baseline: all cows (n = 12) received a high fiber diet without fish oil (FO) for 12 days; 2) Treatment: 4 cows/group received the following treatments for 21 days: a) Low fiber diet without FO (LF), b) High fiber diet + FO (HF + FO) and c) Low fiber diet + FO (LF + FO); 3) Post-treatment: cows returned to the baseline diet and were monitored for 12 days. FO was included at 1.6% DM and HF and LF diets had 40 and 26% NDF, respectively. Milk fat content and yield were unchanged by the LF diet, but were reduced by FO diets at both dietary fiber levels and recovered in the post-treatment period. FO diets caused a pronounced reduction in stearic and oleic acid concentrations in milk fat and an equally pronounced increase in trans-18:1 fatty acid concentrations. Milk fat mean melting point (MMP) was correlated with MFD (r = 0.73) and with milk oleic acid concentration (r = − 0.92). The ratio of oleic:stearic in milk fat increased gradually and consistently in response to FO. Trans-C18:1 isomers with double bounds at carbon ≤ 10 increased with greater MFD and those with double bonds at carbon ≥ 11 decreased with greater MFD. Trans-9 cis-11 CLA explained more than 80% of MFD and was strongly correlated with trans-10 C18:1. Maintenance of MMP below 39–40 °C suggests that the mammary gland was able to secrete only milk fat with adequate fluidity and that MFD could be an adaptation mechanism to prevent secretion of milk with higher MMP.Marco Antonio Sundfeld da Gama, Embrapa Gado de Leite; P. C. Garnsworthy University of Nottingham School of Biosciences Loughborough UK; J. M. Griinari University of Helsinki Finland; P. R. Leme, USP; P. H. M. Rodrigues, USP; L. W. O. Souza, USP; Dante Pazzanese Duarte Lanna, ESALQ/USP.GAMA, M. A. S.GARNSWORTHY, P. C.GRIINARI, J. M.LEME, P. R.RODRIGUES, P. H. M.SOUZA, L. W. O.LANNA, D. P. D.2024-02-08T16:32:23Z2024-02-08T16:32:23Z2009-03-232008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleLivestock Science, v. 115, n. 2/3, p. 319-331, 2008.http://www.alice.cnptia.embrapa.br/alice/handle/doc/596411https://doi.org/10.1016/j.livsci.2007.08.006enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2024-02-08T16:32:23Zoai:www.alice.cnptia.embrapa.br:doc/596411Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542024-02-08T16:32:23falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542024-02-08T16:32:23Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
title Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
spellingShingle Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
GAMA, M. A. S.
Fish oil
Milk fat depression
Trans-fatty acids
Conjugated linoleic acids
Milk fat fluidity
title_short Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
title_full Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
title_fullStr Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
title_full_unstemmed Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
title_sort Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
author GAMA, M. A. S.
author_facet GAMA, M. A. S.
GARNSWORTHY, P. C.
GRIINARI, J. M.
LEME, P. R.
RODRIGUES, P. H. M.
SOUZA, L. W. O.
LANNA, D. P. D.
author_role author
author2 GARNSWORTHY, P. C.
GRIINARI, J. M.
LEME, P. R.
RODRIGUES, P. H. M.
SOUZA, L. W. O.
LANNA, D. P. D.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Marco Antonio Sundfeld da Gama, Embrapa Gado de Leite; P. C. Garnsworthy University of Nottingham School of Biosciences Loughborough UK; J. M. Griinari University of Helsinki Finland; P. R. Leme, USP; P. H. M. Rodrigues, USP; L. W. O. Souza, USP; Dante Pazzanese Duarte Lanna, ESALQ/USP.
dc.contributor.author.fl_str_mv GAMA, M. A. S.
GARNSWORTHY, P. C.
GRIINARI, J. M.
LEME, P. R.
RODRIGUES, P. H. M.
SOUZA, L. W. O.
LANNA, D. P. D.
dc.subject.por.fl_str_mv Fish oil
Milk fat depression
Trans-fatty acids
Conjugated linoleic acids
Milk fat fluidity
topic Fish oil
Milk fat depression
Trans-fatty acids
Conjugated linoleic acids
Milk fat fluidity
description This experiment was designed to examine changes in milk fatty acids during fish oil-induced milk fat depression (MFD) and to test the theory that these changes are related to milk fat fluidity. The experiment was divided into three periods: 1) Baseline: all cows (n = 12) received a high fiber diet without fish oil (FO) for 12 days; 2) Treatment: 4 cows/group received the following treatments for 21 days: a) Low fiber diet without FO (LF), b) High fiber diet + FO (HF + FO) and c) Low fiber diet + FO (LF + FO); 3) Post-treatment: cows returned to the baseline diet and were monitored for 12 days. FO was included at 1.6% DM and HF and LF diets had 40 and 26% NDF, respectively. Milk fat content and yield were unchanged by the LF diet, but were reduced by FO diets at both dietary fiber levels and recovered in the post-treatment period. FO diets caused a pronounced reduction in stearic and oleic acid concentrations in milk fat and an equally pronounced increase in trans-18:1 fatty acid concentrations. Milk fat mean melting point (MMP) was correlated with MFD (r = 0.73) and with milk oleic acid concentration (r = − 0.92). The ratio of oleic:stearic in milk fat increased gradually and consistently in response to FO. Trans-C18:1 isomers with double bounds at carbon ≤ 10 increased with greater MFD and those with double bonds at carbon ≥ 11 decreased with greater MFD. Trans-9 cis-11 CLA explained more than 80% of MFD and was strongly correlated with trans-10 C18:1. Maintenance of MMP below 39–40 °C suggests that the mammary gland was able to secrete only milk fat with adequate fluidity and that MFD could be an adaptation mechanism to prevent secretion of milk with higher MMP.
publishDate 2008
dc.date.none.fl_str_mv 2008
2009-03-23
2024-02-08T16:32:23Z
2024-02-08T16:32:23Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Livestock Science, v. 115, n. 2/3, p. 319-331, 2008.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/596411
https://doi.org/10.1016/j.livsci.2007.08.006
identifier_str_mv Livestock Science, v. 115, n. 2/3, p. 319-331, 2008.
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/596411
https://doi.org/10.1016/j.livsci.2007.08.006
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
_version_ 1794503558018629632