| Influence of the hexenuronic acid content on refining and ageing in eucalyptus TCF pulp. | |
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MedLine Citation:
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PMID: 20074936 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Brightness in totally chlorine-free (TCF) pulp is more unstable than it is in elemental chlorine-free (ECF) pulp, seemingly by effect of the former containing greater amounts of oxidizable structures such as hexenuronic acids (HexA). Accelerated ageing tests involving the application of moist heat to pulp revealed that brightness reversion can be alleviated by using an effective biotechnological method involving an enzyme-mediator treatment. Thus, the joint use of laccase from Trametes villosa and the mediator hydroxybenzotrialoze (HBT) in TCF pulp removes hexenuronic acids by 23% and reduces brightness reversion by 8.4%. Additional tests conducted to assess the effect of HexA on pulp refining revealed that these oxidizable structures introduce hydrophilicity in the pulp. Removing hexenuronic acids from TCF pulp alters its refining outcome as regards drainability ( degrees SR) and water retention capacity (%WRV); also, it leads to paper with comparable strength-related properties which requires no additional refining energy. |
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Authors:
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Edith M Cadena; Teresa Vidal; Antonio L Torres |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-01-13 |
Journal Detail:
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Title: Bioresource technology Volume: 101 ISSN: 1873-2976 ISO Abbreviation: Bioresour. Technol. Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-02-17 Completed Date: 2010-05-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9889523 Medline TA: Bioresour Technol Country: England |
Other Details:
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Languages: eng Pagination: 3554-60 Citation Subset: IM |
Copyright Information:
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Copyright 2009 Elsevier Ltd. All rights reserved. |
Affiliation:
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Textile and Paper Engineering Department, ETSEIAT, Universitat Polit?cnica de Catalunya, Colom 11, E-08222 Terrassa, Spain. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Eucalyptus
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chemistry* Hexuronic Acids / analysis* Trametes / enzymology |
| Chemical | |
Reg. No./Substance:
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0/Hexuronic Acids; 0/hexenuronic acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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