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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
24/04/1992 |
Data da última atualização: |
24/04/1992 |
Autoria: |
GUIMARAES, P. J. |
Título: |
Capim quicuio da Amazonia; bibliografia sinaletica. |
Ano de publicação: |
1979 |
Fonte/Imprenta: |
Corumba: EMBRAPA-Uepae Corumba, 1979. |
Páginas: |
"nao paginado". |
Idioma: |
Português |
Palavras-Chave: |
Bibliografia. |
Thesagro: |
Capim Quicuio. |
Thesaurus Nal: |
Amazonia. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00392nam a2200145 a 4500 001 1583731 005 1992-04-24 008 1979 bl uuuu u0uu1 u #d 100 1 $aGUIMARAES, P. J. 245 $aCapim quicuio da Amazonia; bibliografia sinaletica. 260 $aCorumba: EMBRAPA-Uepae Corumba$c1979 300 $a"nao paginado". 650 $aAmazonia 650 $aCapim Quicuio 653 $aBibliografia
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Embrapa Gado de Leite (CNPGL) |
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Registro Completo
Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
Data corrente: |
25/02/2010 |
Data da última atualização: |
26/02/2010 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
GREINER, R.; SILVA, L. G. da; COURI, S. |
Afiliação: |
RALF GREINER, Federal Research Institute of Nutrition and Food-Germany; LUCINEIA GOMES DA SILVA, CEFET; SONIA COURI, CTAA. |
Título: |
Purification and characterisation of an extracellular phytase from Aspergillus niger 11T53A9. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
Brazilian Journal of Microbiology, São Paulo, v. 40, n. 4, p. 795-807, oct./dec. 2009. |
DOI: |
10.1590/S1517-83822009000400010 |
Idioma: |
Inglês |
Conteúdo: |
An extracellular phytase from Aspergillus niger 11T53A9 was purified about 51-fold to apparent homogeneity with a recovery of 20.3% referred to the phytase activity in the crude extract. Purification was achieved by ammonium sulphate precipitation, ion chromataography and gel filtration. The purified enzyme behaved as a monomeric protein with a molecular mass of about 85 kDa and exhibited maximal phytate-degrading activity at pH 5.0. Optimum temperature for the degradation of phytate was 55°C. The kinetic parameters for the hydrolysis of sodium phytate were determined to be KM = 54 µmol l-1 and kcat = 190 sec-1 at pH 5.0 and 37°C. The purified enzyme was rather specific for phytate dephosphorylation. It was shown that the phytase preferably dephosphorylates myo-inositol hexakisphosphate in a stereospecific way by sequential removal of phosphate groups via D-Ins(1,2,4,5,6)P5, D-Ins(1,2,5,6)P4, D-Ins(1,2,6)P3, D-Ins(1,2)P2 to finally Ins(2)P. |
Palavras-Chave: |
Fitase. |
Thesagro: |
Aspergillus Niger. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://www.scielo.br/pdf/bjm/v40n4/v40n4a10.pdf
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Marc: |
LEADER 01527naa a2200181 a 4500 001 1658932 005 2010-02-26 008 2009 bl --- 0-- u #d 024 7 $a10.1590/S1517-83822009000400010$2DOI 100 1 $aGREINER, R. 245 $aPurification and characterisation of an extracellular phytase from Aspergillus niger 11T53A9. 260 $c2009 520 $aAn extracellular phytase from Aspergillus niger 11T53A9 was purified about 51-fold to apparent homogeneity with a recovery of 20.3% referred to the phytase activity in the crude extract. Purification was achieved by ammonium sulphate precipitation, ion chromataography and gel filtration. The purified enzyme behaved as a monomeric protein with a molecular mass of about 85 kDa and exhibited maximal phytate-degrading activity at pH 5.0. Optimum temperature for the degradation of phytate was 55°C. The kinetic parameters for the hydrolysis of sodium phytate were determined to be KM = 54 µmol l-1 and kcat = 190 sec-1 at pH 5.0 and 37°C. The purified enzyme was rather specific for phytate dephosphorylation. It was shown that the phytase preferably dephosphorylates myo-inositol hexakisphosphate in a stereospecific way by sequential removal of phosphate groups via D-Ins(1,2,4,5,6)P5, D-Ins(1,2,5,6)P4, D-Ins(1,2,6)P3, D-Ins(1,2)P2 to finally Ins(2)P. 650 $aAspergillus Niger 653 $aFitase 700 1 $aSILVA, L. G. da 700 1 $aCOURI, S. 773 $tBrazilian Journal of Microbiology, São Paulo$gv. 40, n. 4, p. 795-807, oct./dec. 2009.
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