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Effects of purified Trichoderma reesei cellulases on the fiber properties of kraft pulp
Tappi journal, 1995-06, Vol.78 (6), p.71-78
ISSN: 0734-1415
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Title:
Effects of purified Trichoderma reesei cellulases on the fiber properties of kraft pulp
Author:
Pere, J. (VTT Biotechnology and Food Research, Espoo, Finland.)
;
Siika-aho, M
;
Buchert, J
;
Viikari, L
Subjects:
ACTIVIDAD ENZIMATICA
;
ACTIVITE ENZYMATIQUE
;
cellobiohydrolases
;
CELLULASE
;
CELULASA
;
ELABORACION DE PULPA
;
endoglucanases
;
ENZYMIC ACTIVITY
;
FIBRAS VEGETALES
;
FIBRE VEGETALE
;
HIDROLASAS
;
HIDROLISIS
;
HYDROLASE
;
HYDROLASES
;
HYDROLYSE
;
HYDROLYSIS
;
O-GLYCOSIDE HYDROLASES
;
PASTA
;
PATE CELLULOSIQUE
;
PINUS
;
PLANT FIBRES
;
PULP
;
PULPING
;
REDUCTION EN PATE
;
RESISTANCE MECANIQUE
;
RESISTENCIA MECANICA
;
STRENGTH
;
SULFATE
;
SULFATOS
;
SULPHATES
;
TRICHODERMA LONGIBRACHIATUM
;
VISCOSIDAD
;
VISCOSITE
;
VISCOSITY
;
wood fibers
;
WOOD PULP
Is Part Of:
Tappi journal, 1995-06, Vol.78 (6), p.71-78
Description:
Purified cellulases from Trichoderma reesei were applied to unbleached pine kraft pulp at various dosages. The purpose was to study the individual effects of the four main cellulases - cellobiohydrolases I and II (CBH I and CBH II) and endoglucanases I and II (EG I and II) - on pulp strength. This approach eliminates the synergy and high levels of saccharification observed for cellulase mixtures. Only 0.20-2.05% of the pulp (dry weight) was solubilized by these enzyme treatments, depending on the cellulase and the dosage applied. Both EGs dramatically decreased pulp viscosity. EG II in particular appears to attack cellulose at sites where even a low level of hydrolysis reduces pulp viscosity, resulting in a marked deterioration of strength properties.
Language:
English
Identifier:
ISSN: 0734-1415
Source:
Alma/SFX Local Collection
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