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Surface character of pulp fibres studied using endoglucanases
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry.
2005 (English)In: Journal of Biotechnology, ISSN 0168-1656, E-ISSN 1873-4863, Vol. 118, no 4, 386-397 p.Article in journal (Refereed) Published
Abstract [en]

The endoglucanase Cel5A from Trichoderma reesei and an endoglucanase from Aspergillus sp. (Novozym 476TM from Novozyme A/S) were evaluated as probes for the surface properties of soft- and hardwood chemical pulp fibres. The hydrolysis time curves were in accordance with a two-phase degradation model described by a biexponential function. The kinetic parameters corresponding to the amount of fast and slow degraded parts of the substrate correlated to tensile index, relative bonded area and z-strength of the paper. All paper properties showing a correlation with enzyme kinetic parameters were related to fibre–fibre interactions. Fluorescence labelling of the reducing end groups in pulp fibres followed by enzyme treatment indicated that the fast substrate class corresponds to the population of “loose” cellulose chain ends not tightly associated with the bulk cellulose. The correlation between the parameters of enzyme kinetics and mechanical properties of the paper produced from the corresponding pulp found in this study should allow a rapid evaluation of the raw fibre material used in paper making process.

Place, publisher, year, edition, pages
2005. Vol. 118, no 4, 386-397 p.
Keyword [en]
Cellulose, cellulase, pulp characterization, endoglucanase, fibre surface, paper
National Category
Other Basic Medicine
URN: urn:nbn:se:uu:diva-74633DOI: 10.1016/j.jbiotec.2005.05.001ISI: 000231302300006PubMedID: 15950308OAI: oai:DiVA.org:uu-74633DiVA: diva2:102543
Available from: 2008-09-10 Created: 2008-09-10 Last updated: 2011-03-16Bibliographically approved

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