| No. Registro | 002423144 |
| Tipo de material | ARTIGO DE PERIODICO - INTERNACIONAL |
| Entrada Principal |  Guimarães, N. C. A (*) NAC |
| Título | Xylanase production from Aspergillus japonicus var aculeatus : production using agroindustrial residues and biobleaching effect on pulp. |
| Imprenta | Henderson, 2013. |
| Descrição | on-line. |
| Idioma | Inglês |
| Nota Local | A BCRP possui o material impresso |
| Assunto | ASPERGILLUS |
| | RESÍDUOS AGRÍCOLAS |
| | ENZIMAS |
| Autor Secundário | Sorgatto, M. (*) |
| | Peixoto Nogueira, S. C. (*) |
| | Betini, Jorge Henrique Almeida (*) |
| | Zanoelo, F. F. (*) NAC Universidade Federal do Mato Grosso do Sul, Laboratório de Bioquímica, Campo Grande, MS |
| | Marques, M. R. (*) NAC Universidade Federal do Mato Grosso do Sul, Laboratório de Bioquímica, Campo Grande, MS |
| | Polizeli, Maria de Lourdes Teixeira de Moraes |
| | Giannesi, G. C. (*) NAC Universidade Federal do Mato Grosso do Sul, Laboratório de Bioquímica, Campo Grande, MS |
| Fonte | In: Journal of Biocatalysis & Biotransformation, Henderson, on-line, 2013, ISSN: 2324-9099 |
| Localiz.Eletrônica | e-mail do autor -- mailto://giannesigiovana@hotmail.com |
| Localiz.Eletrônica |
 "Clicar" sobre o botão para acesso ao Currículo Lattes de Maria de Lourdes Teixeira de Moraes Polizeli |
| Resumo/Outros | This study describes a xylanase produced by A. japonicus var aculeatus, and evaluated the suitability of this protein for cellulose pulp biobleaching process. The best production of xylanase was achieved with wheat bran (AE=11 U/mg of protein). We observed that the xylanase was induced similarly, when the A. japonicus was grown on xylan 0.5% (10.3 U/ml), and on a mixture of wheat bran and xylan (10 U/ml). The optimum xylanase pH and temperature corresponded to 5.0 and 55ºC, respectively. The xylanase remained stable at 45 and 50ºC, retaining 64% of the initial activity during 1 hour of incubation at 45ºC, and had its half-life corresponded to 1 hour at 50ºC. The xylanase activity increased 22% with glycerol, when compared to the control (without additives), incubated during 1 hour at 50ºC. The best result of biobleaching was obtained with 10 U/g dry pulp for 3 hours of treatment, that decreased 3.9 points of the kappa number, in comparison to the control (kappa efficiency-25.2%). Using the xylanase, the brightness improved 2.8, 2.2 and 3.1 points. The results showed that the xylanase produced by A. japonicus has promising characteristics, to be industrially applied on the biobleaching of cellulose pulp |
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| Acervo Geral | Todos os itens |
| Itens na Biblioteca | BCRP-Fac Fil Ciên Let RibPret |
| Unidade USP | FFCLRP -- FAC DE FILOSOFIA, CIÊN LETRAS DE RIBEIRÃO PRETO |
