Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp

Detalhes bibliográficos
Autor(a) principal: Tavares, Valquîria Barco [UNESP]
Data de Publicação: 1997
Outros Autores: Gomes, Eleni [UNESP], Da Silva, Roberto [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/223861
Resumo: Application of the xylanase in the pulp bleaching process has been shown to be effective in decreasing the amount of chlorinating agents in the process and improving the brightness of the pulp, The use of thermostable cellulase-free xylanase might enhance both the technical and economic feasibility of the process. In this work an alkalophylic strain of Bacillus sp 77-2, was isolated which showed a high production of xylanase and free cellulases. The xylanase of Bacillus sp displayed an optimum pH of 6.0 (with 70% activity at pH 9.0), an optimum temperature of 60° C, pH stability in the range 5-10 and thermal stability of 50° C. These characteristics are important to the kraft pulp bleaching because they are similar to those found in the industrial paper environment.
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spelling Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulpBiobleachingKraft pulpXylanaseApplication of the xylanase in the pulp bleaching process has been shown to be effective in decreasing the amount of chlorinating agents in the process and improving the brightness of the pulp, The use of thermostable cellulase-free xylanase might enhance both the technical and economic feasibility of the process. In this work an alkalophylic strain of Bacillus sp 77-2, was isolated which showed a high production of xylanase and free cellulases. The xylanase of Bacillus sp displayed an optimum pH of 6.0 (with 70% activity at pH 9.0), an optimum temperature of 60° C, pH stability in the range 5-10 and thermal stability of 50° C. These characteristics are important to the kraft pulp bleaching because they are similar to those found in the industrial paper environment.Lab. Bioquim. Processes M. A. IBILCE Universidade Estadual Paulista, Sao Jose do Rio Preto, SPIBILCE UNESP Cristovão Colombo, 2265, CEP 15054-000, Sao Jose do Rio PretoLab. Bioquim. Processes M. A. IBILCE Universidade Estadual Paulista, Sao Jose do Rio Preto, SPIBILCE UNESP Cristovão Colombo, 2265, CEP 15054-000, Sao Jose do Rio PretoUniversidade Estadual Paulista (UNESP)Tavares, Valquîria Barco [UNESP]Gomes, Eleni [UNESP]Da Silva, Roberto [UNESP]2022-04-28T19:53:27Z2022-04-28T19:53:27Z1997-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article179-182Revista de Microbiologia, v. 28, n. 3, p. 179-182, 1997.0001-3714http://hdl.handle.net/11449/2238612-s2.0-0004964564Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista de Microbiologiainfo:eu-repo/semantics/openAccess2022-04-28T19:53:27Zoai:repositorio.unesp.br:11449/223861Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:25:05.938360Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp
title Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp
spellingShingle Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp
Tavares, Valquîria Barco [UNESP]
Biobleaching
Kraft pulp
Xylanase
title_short Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp
title_full Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp
title_fullStr Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp
title_full_unstemmed Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp
title_sort Characterization of a cellulase-free xylanase producing Bacillus SP for biobleaching of kraft pulp
author Tavares, Valquîria Barco [UNESP]
author_facet Tavares, Valquîria Barco [UNESP]
Gomes, Eleni [UNESP]
Da Silva, Roberto [UNESP]
author_role author
author2 Gomes, Eleni [UNESP]
Da Silva, Roberto [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Tavares, Valquîria Barco [UNESP]
Gomes, Eleni [UNESP]
Da Silva, Roberto [UNESP]
dc.subject.por.fl_str_mv Biobleaching
Kraft pulp
Xylanase
topic Biobleaching
Kraft pulp
Xylanase
description Application of the xylanase in the pulp bleaching process has been shown to be effective in decreasing the amount of chlorinating agents in the process and improving the brightness of the pulp, The use of thermostable cellulase-free xylanase might enhance both the technical and economic feasibility of the process. In this work an alkalophylic strain of Bacillus sp 77-2, was isolated which showed a high production of xylanase and free cellulases. The xylanase of Bacillus sp displayed an optimum pH of 6.0 (with 70% activity at pH 9.0), an optimum temperature of 60° C, pH stability in the range 5-10 and thermal stability of 50° C. These characteristics are important to the kraft pulp bleaching because they are similar to those found in the industrial paper environment.
publishDate 1997
dc.date.none.fl_str_mv 1997-12-01
2022-04-28T19:53:27Z
2022-04-28T19:53:27Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Revista de Microbiologia, v. 28, n. 3, p. 179-182, 1997.
0001-3714
http://hdl.handle.net/11449/223861
2-s2.0-0004964564
identifier_str_mv Revista de Microbiologia, v. 28, n. 3, p. 179-182, 1997.
0001-3714
2-s2.0-0004964564
url http://hdl.handle.net/11449/223861
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Revista de Microbiologia
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 179-182
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128221468688384

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