Repository logo
 
Publication

Characterization and application of glycanases secreted by Aspergillus terreus CCMI 498 and Trichoderma viride CCMI 84 for enzymatic deinking of mixed office wastepaper

2003-02Journal article Restricted access
Simple item page
dc.contributor.authorMarques, Susana
dc.contributor.authorPala, Helena
dc.contributor.authorAlves, L.
dc.contributor.authorAmaral-Collaço, M. T.
dc.contributor.authorGama, Francisco Miguel
dc.contributor.authorGírio, Francisco M.
dc.date.accessioned2009-08-12T15:53:28Z
dc.date.available2009-08-12T15:53:28Z
dc.date.issued2003-02
dc.description.abstractTwo enzymatic extracts obtained from xylan-grown Aspergillus terreus CCMI 498 and cellulose-grown Trichoderma viride CCMI 84 were characterised for different glycanase activities. Both strains produce extracellular endoxylanase and endoglucanase enzymes. The enzymes optimal activity was found in the temperature range of 45 /60 8C. Endoglucanase systems show identical activity profiles towards temperature, regardless of the strain and inducing substrate. Conversely, the endoxylanases produced by both strains showed maximal activity at different pH values (from 4.5 to 5.5), being the more acidic xylanase produced by T. viride grown on cellulose. The endoglucanase activities have an optimum pH at 4.5 /5.0. The endoxylanase and endoglucanase activities exhibited high stability at 50 8C and pH 5.0. Mannanase, b-xylosidase, and amylase activities were also found, being the first two activities only present for T. viride extract. These two enzymatic extracts were used for mixed office wastepaper (MOW) deinking. When the enzymatic extract from T. viride was used, a further increase of 24% in ink removal was obtained by comparison with the control. Both enzymes contributed to the improvement of the paper strength properties and the obtained results clearly indicate that the effective use of enzymes for deinking can also contribute to the pulp and paper properties improvement.pt
dc.identifier.citationMARQUES, S. e outros - Characterization and application of glycanases secreted by Aspergillus terreus CCMI 498 and Trichoderma viride CCMI 84 for enzymatic deinking of mixed office wastepaper. Journal of Biotechnology. Vol. 100, n.º 3 (2003), p. 209-219.pt
dc.identifier.issn0168-1656
dc.identifier.urihttp://hdl.handle.net/10400.8/78
dc.language.isoengpt
dc.publisherElsevierpt
dc.subjectHemicellulasept
dc.subjectEndoglucanasept
dc.subjectAmylasept
dc.subjectEnzymatic deinkingpt
dc.subjectAspergillus terreuspt
dc.subjectTrichoderma viridept
dc.titleCharacterization and application of glycanases secreted by Aspergillus terreus CCMI 498 and Trichoderma viride CCMI 84 for enzymatic deinking of mixed office wastepaperpt
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage219pt
oaire.citation.startPage209pt
oaire.citation.titleJournal of Biotechnologypt
person.familyNamePala
person.givenNameHelena
person.identifier.ciencia-id7B1B-7C11-411B
person.identifier.orcid0000-0001-7162-9621
person.identifier.scopus-author-id6603182617
rcaap.rightsrestrictedAccess
rcaap.typearticlept
relation.isAuthorOfPublication70de6a08-f481-4558-a268-80471bc5cc83
relation.isAuthorOfPublication.latestForDiscovery70de6a08-f481-4558-a268-80471bc5cc83

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
deinking INETI_UM.pdf
Size:
291 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.79 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ESTG - Artigos em revistas internacionais