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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
25/01/2019 |
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Data da última atualização: |
25/01/2019 |
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Autoria: |
BREVES, G.; HOELLER, H.; HARMEYER, J.; MARTENS, H. |
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Título: |
Thiamin balance in the gastrointestinal tract of sheep. |
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Ano de publicação: |
1980 |
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Fonte/Imprenta: |
Journal of Animal Science, v. 51, n. 5, p. 1177-1181, Nov. 1980. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Six 5- to 6-month-old sheep fitted with rumen fistulas and reentrant cannulas in the duodenum and in the ileum were adapted to two dies low in thiamin and containing different percentages of urea nitrogen. The sheep were subjected to seven thiamin balance experiments, with continuous feeding and total collection of duodenal and ideal contents and feces for periods of 6 day each. Thiamin and dry matter were determined in aliquots of collected digesta and feces. Daily thiamin intake was always less than .3 mg, but average daily flow of thiamin into the duodenum was between 1.53 and 3.46 milligrams. Microbial net synthesis of thiamin in the forestomach system was between 1.44 and 3.23 mg/day, so 90 to 96% of thiamin entering the duodenum was of microbial origin. Disappearance of thiamin from the small intestines approximately equaled thiamin net synthesis in the forestomachs, indicating high absorption of microbially produced thiamin. In five experiments, thiamin balance in the large intestines was positive, but no measurements were made of thiamin breakdown within, and absorption from, the large intestines. |
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Palavras-Chave: |
Thiamine. |
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Thesaurus Nal: |
Digestive system; Duodenum; Intestinal absorption; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01700naa a2200217 a 4500
001 2104806
005 2019-01-25
008 1980 bl uuuu u00u1 u #d
100 1 $aBREVES, G.
245 $aThiamin balance in the gastrointestinal tract of sheep.
260 $c1980
520 $aAbstract: Six 5- to 6-month-old sheep fitted with rumen fistulas and reentrant cannulas in the duodenum and in the ileum were adapted to two dies low in thiamin and containing different percentages of urea nitrogen. The sheep were subjected to seven thiamin balance experiments, with continuous feeding and total collection of duodenal and ideal contents and feces for periods of 6 day each. Thiamin and dry matter were determined in aliquots of collected digesta and feces. Daily thiamin intake was always less than .3 mg, but average daily flow of thiamin into the duodenum was between 1.53 and 3.46 milligrams. Microbial net synthesis of thiamin in the forestomach system was between 1.44 and 3.23 mg/day, so 90 to 96% of thiamin entering the duodenum was of microbial origin. Disappearance of thiamin from the small intestines approximately equaled thiamin net synthesis in the forestomachs, indicating high absorption of microbially produced thiamin. In five experiments, thiamin balance in the large intestines was positive, but no measurements were made of thiamin breakdown within, and absorption from, the large intestines.
650 $aDigestive system
650 $aDuodenum
650 $aIntestinal absorption
650 $aSheep
653 $aThiamine
700 1 $aHOELLER, H.
700 1 $aHARMEYER, J.
700 1 $aMARTENS, H.
773 $tJournal of Animal Science$gv. 51, n. 5, p. 1177-1181, Nov. 1980.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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