摘要:
The invention concerns a process for hydrolyzing hemicelluloses, especially xylan, using an enzyme preparation isolated from Trichoderma reesei, containing an endo-β-xylanase I (pI 5.5) and an endo-β-xylanase II (pI 9.0). The invention further concerns the use of this enzyme preparation in the improving of the sheet properties and the bleachability of pulps and for the production of sugars from hemicellulosic substrates.
摘要:
This invention relates to a method for decreasing the foam formation during cultivation of a microorganism and to a method for producing an enhanced amount of a product of interest. The method comprises that the microorganism is modified in such a way that the microorganism does not produce an essential amount of at least one of the proteins, polypeptides or peptides associated with foam formation during cultivation of the unmodified microorganism. In particular the method comprises that the microorganism is modified not to produce an essential amount of amphipathic or hydrophobic proteins, polypeptides or peptides.
摘要:
The present invention concerns a method for enzymatic treatment of lignocellulosic materials which contain xylan-polymers, such as cellulose kraft pulps. According to a method of the present kind, at least a part of the hexenuronic acid groups present in the material is selectively removed in order to remove metal ions from the pulp, to change the surface charge thereof, to improve the brightness stability of the pulp and to render the material more suitable for enzymatic treatment.
摘要:
This invention relates to a method for decreasing the foam formation during cultivation of a microorganism and to a method for producing an enhanced amount of a product of interest. The method comprises that the microorganism is modified in such a way that the microorganism does not produce an essential amount of at least one of the proteins, polypeptides or peptides associated with foam formation during cultivation of the unmodified microorganism. In particular the method comprises that the microorganism is modified not to produce an essential amount of amphipathic or hydrophobic proteins, polypeptides or peptides.
摘要:
The invention concerns a process for hydrolyzing hemicelluloses, especially xylan, using an enzyme preparation isolated from Trichoderma reesei, containing an endo- beta -xylanase I (pI 5.5) and an endo- beta -xylanase II (pI 9.0). The invention further concerns the use of this enzyme preparation in the improving of the sheet properties and the bleachability of pulps and for the production of sugars from hemicellulosic substrates.
摘要:
Procédé d'hydrolyse des hémicelluloses, notamment la xylane, à l'aide d'une préparation enzymatique isolée à partir de Trichoderma reesei et contenant une endo-beta-xylanase I (pI 5,5) et une endo-beta-xylanase II (pL 9,0). On peut utiliser cette préparation enzymatique pour améliorer les caractéristiques de feuille et la susceptibilité au blanchiment des pâtes, ainsi que pour la production de sucres à partir de substrats hémicellulosiques.
摘要:
The present invention concerns a method for enzymatic treatment of lignocellulosic materials which contain xylan-polymers, such as cellulose kraft pulps. According to a method of the present kind, at least a part of the hexenuronic acid groups present in the material is selectively removed in order to remove metal ions from the pulp, to change the surface charge thereof, to improve the brightness stability of the pulp and to render the material more suitable for enzymatic treatment.