Publicação
Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps
| Resumo: | The effects of multiple xylanase treatments were assessed during the peroxide bleaching of three pulps: Douglas-fir (kraft); Western hemlock (oxygen delignified kraft); and trembling Aspen (kraft). The addition of a xylanase treatment stage, either before or after the peroxide bleaching stage(s), resulted in the enhanced brightening of all pulps. A higher brightness was achieved using two enzyme treatments, one before and one after the peroxide stage(s). Both bleach boosting and direct brightening seemed to contribute to the enhancement of peroxide bleaching. Compared to xylanase prebleaching, xylanase posttreatment of the peroxide bleached pulps solubilized less lignin and chromophores and made smaller amounts of these materials alkaline soluble. Nevertheless, the final brightness achieved by xylanase posttreatment was similar or superior to that achieved with xylanase prebleaching of the corresponding unbleached pulps. |
|---|---|
| Autores principais: | Wong, Ken K. Y. |
| Outros Autores: | Martin, Lori A.; Gama, F. M.; Saddler, John N.; De Jong, Ed |
| Assunto: | Xylanase Kraft pulp Peroxide bleaching |
| Ano: | 1997 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1867437980679929856 |
|---|---|
| author | Wong, Ken K. Y. |
| author2 | Martin, Lori A. Gama, F. M. Saddler, John N. De Jong, Ed |
| author2_role | author author author author |
| author_facet | Wong, Ken K. Y. Martin, Lori A. Gama, F. M. Saddler, John N. De Jong, Ed |
| author_role | author |
| contributor_name_str_mv | RepositóriUM - Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Wong, Ken K. Y.\"},{\"Person.name\":\"Martin, Lori A.\"},{\"Person.name\":\"Gama, F. M.\"},{\"Person.name\":\"Saddler, John N.\"},{\"Person.name\":\"De Jong, Ed\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RepositóriUM - Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Wong, Ken K. Y. Martin, Lori A. Gama, F. M. Saddler, John N. De Jong, Ed |
| datacite.date.Accepted.fl_str_mv | 1997-05-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2005-05-11T10:03:51Z |
| datacite.date.embargoed.fl_str_mv | 2005-05-11T10:03:51Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Xylanase Kraft pulp Peroxide bleaching |
| datacite.titles.title.fl_str_mv | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps |
| dc.contributor.none.fl_str_mv | RepositóriUM - Universidade do Minho |
| dc.creator.none.fl_str_mv | Wong, Ken K. Y. Martin, Lori A. Gama, F. M. Saddler, John N. De Jong, Ed |
| dc.date.Accepted.fl_str_mv | 1997-05-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2005-05-11T10:03:51Z |
| dc.date.embargoed.fl_str_mv | 2005-05-11T10:03:51Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/1531 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | John Wiley and Sons |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Xylanase Kraft pulp Peroxide bleaching |
| dc.title.fl_str_mv | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | The effects of multiple xylanase treatments were assessed during the peroxide bleaching of three pulps: Douglas-fir (kraft); Western hemlock (oxygen delignified kraft); and trembling Aspen (kraft). The addition of a xylanase treatment stage, either before or after the peroxide bleaching stage(s), resulted in the enhanced brightening of all pulps. A higher brightness was achieved using two enzyme treatments, one before and one after the peroxide stage(s). Both bleach boosting and direct brightening seemed to contribute to the enhancement of peroxide bleaching. Compared to xylanase prebleaching, xylanase posttreatment of the peroxide bleached pulps solubilized less lignin and chromophores and made smaller amounts of these materials alkaline soluble. Nevertheless, the final brightness achieved by xylanase posttreatment was similar or superior to that achieved with xylanase prebleaching of the corresponding unbleached pulps. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorium.uminho.pt/bitstreams/6c60dc59-6af0-4825-98aa-809c23266e22/download |
| id | rum_520aa79bb2e00dc6dcf81c38d439e351 |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/1531 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/1531 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Wong, Ken K. Y. Martin, Lori A. Gama, F. M. Saddler, John N. De Jong, Ed |
| publishDate | 1997 |
| publisher.none.fl_str_mv | John Wiley and Sons |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engJohn Wiley and SonsengThe effects of multiple xylanase treatments were assessed during the peroxide bleaching of three pulps: Douglas-fir (kraft); Western hemlock (oxygen delignified kraft); and trembling Aspen (kraft). The addition of a xylanase treatment stage, either before or after the peroxide bleaching stage(s), resulted in the enhanced brightening of all pulps. A higher brightness was achieved using two enzyme treatments, one before and one after the peroxide stage(s). Both bleach boosting and direct brightening seemed to contribute to the enhancement of peroxide bleaching. Compared to xylanase prebleaching, xylanase posttreatment of the peroxide bleached pulps solubilized less lignin and chromophores and made smaller amounts of these materials alkaline soluble. Nevertheless, the final brightness achieved by xylanase posttreatment was similar or superior to that achieved with xylanase prebleaching of the corresponding unbleached pulps.application/pdfengBleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulpsWong, Ken K. Y.Martin, Lori A.Gama, F. M.Saddler, John N.De Jong, EdHostingInstitutionOrganizationalRepositóriUM - Universidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptCITATION"Biotechnology and bioengineering". ISSN 0006-3592. 54:4 (1997) 312-318.ISSNIsPartOf0006-35922005-05-11T10:03:51Z1997-051997-05-01T00:00:00ZHandlehttps://hdl.handle.net/1822/1531http://purl.org/coar/access_right/c_abf2open accessXylanaseKraft pulpPeroxide bleaching239562 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorium.uminho.pt/bitstreams/6c60dc59-6af0-4825-98aa-809c23266e22/download |
| spellingShingle | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps Wong, Ken K. Y. Xylanase Kraft pulp Peroxide bleaching |
| status | SINGLETON |
| subject.fl_str_mv | Xylanase Kraft pulp Peroxide bleaching |
| title | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps |
| title_full | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps |
| title_fullStr | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps |
| title_full_unstemmed | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps |
| title_short | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps |
| title_sort | Bleach boosting and direct brightening by multiple xylanase treatments during peroxide bleaching of kraft pulps |
| topic | Xylanase Kraft pulp Peroxide bleaching |
| topic_facet | Xylanase Kraft pulp Peroxide bleaching |
| url | https://hdl.handle.net/1822/1531 |
| visible | 1 |