Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional do INPA |
Texto Completo: | https://repositorio.inpa.gov.br/handle/1/16358 |
Resumo: | Crude xylanase preparations from Penicillium corylophilum, Aspergillus niger and Trichoderma longibrachiatum were used to treat Eucalyptus kraft pulp, prior to chlorine dioxide and alkaline bleaching sequences. The enzyme pretreatment improved brightness and delignification of non-delignified and oxygen-bleached samples of eucalyptus kraft pulp. Xylanase preparations from T. longibrachiatum and P. corylophilum were more effective to reduce pulp kappa number. A small reduction in viscosity was obtained when the oxygen-bleached pulp was treated with xylanase preparation from A. niger. For all enzyme samples, the best release of chromophoric material from the pulp was at 237 nm. The enzyme preparation from P. corylophilum was responsible for the highest release of reducing sugar at a dosage interval of 10-20 IU/g dry weight pulp. Scanning electron microscopy studies of oxygen-bleached pulp after xylanase treatment revealed morphological changes, including holes, cracks, filament forming and peeling. |
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Garcia Medeiros, RoseliSilva Júnior, Francides GomesBáo, Sônia N.Hanada, Rogério EijiFilho, Edivaldo Ximenes Ferreira2020-06-03T21:27:35Z2020-06-03T21:27:35Z2007https://repositorio.inpa.gov.br/handle/1/1635810.1590/S1516-89132007000200008Crude xylanase preparations from Penicillium corylophilum, Aspergillus niger and Trichoderma longibrachiatum were used to treat Eucalyptus kraft pulp, prior to chlorine dioxide and alkaline bleaching sequences. The enzyme pretreatment improved brightness and delignification of non-delignified and oxygen-bleached samples of eucalyptus kraft pulp. Xylanase preparations from T. longibrachiatum and P. corylophilum were more effective to reduce pulp kappa number. A small reduction in viscosity was obtained when the oxygen-bleached pulp was treated with xylanase preparation from A. niger. For all enzyme samples, the best release of chromophoric material from the pulp was at 237 nm. The enzyme preparation from P. corylophilum was responsible for the highest release of reducing sugar at a dosage interval of 10-20 IU/g dry weight pulp. Scanning electron microscopy studies of oxygen-bleached pulp after xylanase treatment revealed morphological changes, including holes, cracks, filament forming and peeling.Volume 50, Número 2, Pags. 231-238Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessAspergillus NigerEucalyptusPenicilliumPenicillium CorylophilumTrichodermaTrichoderma LongibrachiatumApplication of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulpsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleBrazilian Archives of Biology and Technologyengreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfartigo-inpa.pdfapplication/pdf653252https://repositorio.inpa.gov.br/bitstream/1/16358/1/artigo-inpa.pdfb31d7abfeb56b75a7f56d4a68d9c9005MD511/163582020-06-03 17:38:51.276oai:repositorio:1/16358Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-06-03T21:38:51Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.en.fl_str_mv |
Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps |
title |
Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps |
spellingShingle |
Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps Garcia Medeiros, Roseli Aspergillus Niger Eucalyptus Penicillium Penicillium Corylophilum Trichoderma Trichoderma Longibrachiatum |
title_short |
Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps |
title_full |
Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps |
title_fullStr |
Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps |
title_full_unstemmed |
Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps |
title_sort |
Application of xylanases from amazon forest fungal species in bleaching of eucalyptus kraft pulps |
author |
Garcia Medeiros, Roseli |
author_facet |
Garcia Medeiros, Roseli Silva Júnior, Francides Gomes Báo, Sônia N. Hanada, Rogério Eiji Filho, Edivaldo Ximenes Ferreira |
author_role |
author |
author2 |
Silva Júnior, Francides Gomes Báo, Sônia N. Hanada, Rogério Eiji Filho, Edivaldo Ximenes Ferreira |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Garcia Medeiros, Roseli Silva Júnior, Francides Gomes Báo, Sônia N. Hanada, Rogério Eiji Filho, Edivaldo Ximenes Ferreira |
dc.subject.eng.fl_str_mv |
Aspergillus Niger Eucalyptus Penicillium Penicillium Corylophilum Trichoderma Trichoderma Longibrachiatum |
topic |
Aspergillus Niger Eucalyptus Penicillium Penicillium Corylophilum Trichoderma Trichoderma Longibrachiatum |
description |
Crude xylanase preparations from Penicillium corylophilum, Aspergillus niger and Trichoderma longibrachiatum were used to treat Eucalyptus kraft pulp, prior to chlorine dioxide and alkaline bleaching sequences. The enzyme pretreatment improved brightness and delignification of non-delignified and oxygen-bleached samples of eucalyptus kraft pulp. Xylanase preparations from T. longibrachiatum and P. corylophilum were more effective to reduce pulp kappa number. A small reduction in viscosity was obtained when the oxygen-bleached pulp was treated with xylanase preparation from A. niger. For all enzyme samples, the best release of chromophoric material from the pulp was at 237 nm. The enzyme preparation from P. corylophilum was responsible for the highest release of reducing sugar at a dosage interval of 10-20 IU/g dry weight pulp. Scanning electron microscopy studies of oxygen-bleached pulp after xylanase treatment revealed morphological changes, including holes, cracks, filament forming and peeling. |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007 |
dc.date.accessioned.fl_str_mv |
2020-06-03T21:27:35Z |
dc.date.available.fl_str_mv |
2020-06-03T21:27:35Z |
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 |
https://repositorio.inpa.gov.br/handle/1/16358 |
dc.identifier.doi.none.fl_str_mv |
10.1590/S1516-89132007000200008 |
url |
https://repositorio.inpa.gov.br/handle/1/16358 |
identifier_str_mv |
10.1590/S1516-89132007000200008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Volume 50, Número 2, Pags. 231-238 |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Brazilian Archives of Biology and Technology |
publisher.none.fl_str_mv |
Brazilian Archives of Biology and Technology |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional do INPA instname:Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA |
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Instituto Nacional de Pesquisas da Amazônia (INPA) |
instacron_str |
INPA |
institution |
INPA |
reponame_str |
Repositório Institucional do INPA |
collection |
Repositório Institucional do INPA |
bitstream.url.fl_str_mv |
https://repositorio.inpa.gov.br/bitstream/1/16358/1/artigo-inpa.pdf |
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b31d7abfeb56b75a7f56d4a68d9c9005 |
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repository.name.fl_str_mv |
Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA) |
repository.mail.fl_str_mv |
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1809928897914994688 |