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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
30/03/2023 |
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Autoria: |
LINZELL, J. L. |
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Afiliação: |
Agricultural Research Council Institute of Animal Physiology, Babraham, Cambridge. |
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Título: |
Mammary-gland blood flow and oxygen, glucose and volatile fatty acid uptake in the conscius goat. |
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Ano de publicação: |
1960 |
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Fonte/Imprenta: |
The Journal of Physiology, v. 153, n. 3, p. 492-509, Oct. 1960. |
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DOI: |
10.1113/jphysiol.1960.sp006550 |
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Idioma: |
Inglês |
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Conteúdo: |
1. Mammary-gland blood flow, weight, milk yield and arteriovenous differences of 02, Ca, glucose and volatile fatty acids have been measured at all stages of the reproductive cycle in goats trained to stand in the laboratory. 2. The mean blood flow was 28 ml./100 g/min in dry goats and 45 ml./ 100 g/min in lactating animals giving 100 ml. milk/l00 g/day. Holding goats on their sides, as was done by previous workers who recorded much lower figures, significantly reduced the mammary blood flow. 3. Blood flow variation from minute to minute was 10 % of the mean (S.D.), and was not significantly greater from hour to hour or from day to day. During lactation the blood flow varied with the milk yield. 4. The mean arteriovenous differences and instantaneous R.Q. agree well with those of previous workers. The mean ratio of blood flow to milk yield (650:1) calculated from the Ca difference and the milk Ca agrees with earlier estimates and with directly observed values, but was found to increase with a fall in milk yield and is thus a measure of efficiency. 5. During lactation 02 consumption doubles, the uptake of volatile fatty acids trebles but glucose uptake increases nine times. 6. On the average 100 % of the Ca, and 80 % of the N and calories removed from the blood appear in the milk. Similarly 80 % of the neutral fat and volatile fatty acids taken up are accounted for in milk fat but only 50 % of the glucose appears as lactose. 7. The importance of glucose in the metabolism of lactating ruminants is stressed. Menos1. Mammary-gland blood flow, weight, milk yield and arteriovenous differences of 02, Ca, glucose and volatile fatty acids have been measured at all stages of the reproductive cycle in goats trained to stand in the laboratory. 2. The mean blood flow was 28 ml./100 g/min in dry goats and 45 ml./ 100 g/min in lactating animals giving 100 ml. milk/l00 g/day. Holding goats on their sides, as was done by previous workers who recorded much lower figures, significantly reduced the mammary blood flow. 3. Blood flow variation from minute to minute was 10 % of the mean (S.D.), and was not significantly greater from hour to hour or from day to day. During lactation the blood flow varied with the milk yield. 4. The mean arteriovenous differences and instantaneous R.Q. agree well with those of previous workers. The mean ratio of blood flow to milk yield (650:1) calculated from the Ca difference and the milk Ca agrees with earlier estimates and with directly observed values, but was found to increase with a fall in milk yield and is thus a measure of efficiency. 5. During lactation 02 consumption doubles, the uptake of volatile fatty acids trebles but glucose uptake increases nine times. 6. On the average 100 % of the Ca, and 80 % of the N and calories removed from the blood appear in the milk. Similarly 80 % of the neutral fat and volatile fatty acids taken up are accounted for in milk fat but only 50 % of the glucose appears as lactose. 7. The importance of glucose in the metabolism of l... Mostrar Tudo |
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Palavras-Chave: |
Oxygen metabolism. |
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Thesagro: |
Caprino; Fisiologia; Glândula Mamaria. |
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Thesaurus Nal: |
Animal physiology; Glucose; Goats; Humans; Lipid metabolism; Mammary glands; Reproduction; Volatile fatty acids. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02342naa a2200277 a 4500
001 1522338
005 2023-03-30
008 1960 bl uuuu u00u1 u #d
024 7 $a10.1113/jphysiol.1960.sp006550$2DOI
100 1 $aLINZELL, J. L.
245 $aMammary-gland blood flow and oxygen, glucose and volatile fatty acid uptake in the conscius goat.$h[electronic resource]
260 $c1960
520 $a1. Mammary-gland blood flow, weight, milk yield and arteriovenous differences of 02, Ca, glucose and volatile fatty acids have been measured at all stages of the reproductive cycle in goats trained to stand in the laboratory. 2. The mean blood flow was 28 ml./100 g/min in dry goats and 45 ml./ 100 g/min in lactating animals giving 100 ml. milk/l00 g/day. Holding goats on their sides, as was done by previous workers who recorded much lower figures, significantly reduced the mammary blood flow. 3. Blood flow variation from minute to minute was 10 % of the mean (S.D.), and was not significantly greater from hour to hour or from day to day. During lactation the blood flow varied with the milk yield. 4. The mean arteriovenous differences and instantaneous R.Q. agree well with those of previous workers. The mean ratio of blood flow to milk yield (650:1) calculated from the Ca difference and the milk Ca agrees with earlier estimates and with directly observed values, but was found to increase with a fall in milk yield and is thus a measure of efficiency. 5. During lactation 02 consumption doubles, the uptake of volatile fatty acids trebles but glucose uptake increases nine times. 6. On the average 100 % of the Ca, and 80 % of the N and calories removed from the blood appear in the milk. Similarly 80 % of the neutral fat and volatile fatty acids taken up are accounted for in milk fat but only 50 % of the glucose appears as lactose. 7. The importance of glucose in the metabolism of lactating ruminants is stressed.
650 $aAnimal physiology
650 $aGlucose
650 $aGoats
650 $aHumans
650 $aLipid metabolism
650 $aMammary glands
650 $aReproduction
650 $aVolatile fatty acids
650 $aCaprino
650 $aFisiologia
650 $aGlândula Mamaria
653 $aOxygen metabolism
773 $tThe Journal of Physiology$gv. 153, n. 3, p. 492-509, Oct. 1960.
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Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 6 | |
| 1. |  | BASSAN, M. M.; MOURÃO FILHO, F. de A. A.; MIYATA, L. Y.; MENDES, B. M. J. In vitro organogenesis from internodal segments of adult sweet orange plants. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 46, n. 6, p. 672-674, jun. 2011 Notas Científicas. Título em português: Organogênese in vitro a partir de segmentos internodais derivados de plantas adultas de laranja doce.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 3. | | RODRIGUES, F. A.; COSTA, F. H. da S.; CASTRO, E. M. de; PASQUAL, M.; PEREIRA, J. E. S.; MIYATA, L. Y. Anatomia foliar de cultivares de bananeira, influenciada por mudanças no ambiente de cultivo na fase de enraizamento/alongamento in vitro. Revista Brasileira de Horticultura Ornamental, v. 13, p. 746-749, 2007. Suplemento. Edição do 16. Congresso Brasileiro de Floricultura e Plantas Ornamentais; 3. Congresso Brasileiro de Cultura de Tecidos de Plantas; 1. Simpósio de Plantas Ornamentais Nativas, 2007, Goiânia.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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| 4. | | COSTA, F. H. da S.; PASQUAL, M.; ROCHA, H. S.; PEREIRA, J. E. S.; CASTRO, E. M. de; MIYATA, L. Y. Crescimento e anatomia foliar de bananeiras submetidas a diferentes condições de cultivo in vitro. Bragantia, Campinas, v. 68, n. 2, p. 303-311, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 5. | | ATTÍLIO, L. B.; MOURÃO FILHO, F. de A. A.; HARAKAVA, R.; SILVA, T. L. da; MIYATA, L. Y.; STIPP, L. C. L.; MENDES, B. M. J. Genetic transformation of sweet oranges with the D4E1 gene driven by tha AtPP2 promoter. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 48, n. 7, p. 741-747, jul. 2013. Título em português: Transformação genética de laranjas doces com o gene D4E1 dirigido pelo promotor AtPP2.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 6. | | SANTOS, A. M. dos; COSTA, F. H. da S.; PASQUAL, M.; CASTRO, E. M. de; PEREIRA, J. E. S.; MIYATA, L. Y. Efeitos da luz natural e sacarose na perda de água e anatomia foliar de plantas de bananeira, na fase de enraizamento/alongamento in vitro. Revista Brasileira de Horticultura Ornamental, v. 13, p. 961-964, 2007. Suplemento. Edição do 16. Congresso Brasileiro de Floricultura e Plantas Ornamentais; 3. Congresso Brasileiro de Cultura de Tecidos de Plantas; 1. Simpósio de Plantas Ornamentais Nativas, 2007, Goiânia.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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| Registros recuperados : 6 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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