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公开(公告)号：US5202249A
公开(公告)日：1993-04-13
申请号：US744570
申请日：1991-08-13
申请人： Dieter Kluepfel , Rolf Morosoli , Francois Shareck
发明人： Dieter Kluepfel , Rolf Morosoli , Francois Shareck
CPC分类号： D21C5/005 , C12N9/2482 , C12Y302/01008 , Y10S435/886
摘要： A process for the production and use of a xylanase enzyme, having a high specific activity, of use in the treatment and/or biobleaching of chemical pulps is described. The enzyme provides for a more commercially feasible process for the treatment of pulps, and lignocellulosic materials in general, which process provides improved results in delignification and brightening over conventional bleaching process, together with reduced bleaching chemical consumption and environmental impact.
摘要翻译： 描述了在化学纸浆的处理和/或生物漂白中用于生产和使用具有高比活性的木聚糖酶的方法。 该酶提供了一种更商业上可行的用于纸浆处理和木质纤维素材料的方法，该方法通常在常规漂白方法中提供脱木素和增亮的改进结果，同时减少漂白化学品消耗和环境影响。
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公开(公告)号：US5116746A
公开(公告)日：1992-05-26
申请号：US764083
申请日：1991-09-23
CPC分类号： C12Y302/01132 , C12N15/76 , C12N9/2482 , C12P19/14 , C12Y302/01008 , D21C5/005 , Y10S435/886
摘要： A method of treating lignocellulosic material with a cellulase-free endo-xylanase for delignification, brightening and viscosity improvement. The endo-xylanase is obtained by the overexpression of the xylanase gene using a cellulase-negative recombinant microorganism of the genus Streptomyces. The recombinant microorganism is produced in a homologous cloning system in which the xylanase gene is inserted into a vector plasmid to provide the hybrid plasmid that is introduced into a host cellulase-negative mutant strain and said xylanase gene, said vector plasmid and said host mutant strain are obtained from microorganisms of the genus Streptomyces.
摘要翻译： 用无纤维素酶的内切木聚糖酶处理木质纤维素材料用于脱木质素，增亮和粘度改进的方法。 木聚糖酶通过使用链霉菌属的纤维素酶阴性重组微生物的木聚糖酶基因的过表达获得。 重组微生物在同源克隆系统中产生，其中将木聚糖酶基因插入载体质粒中以提供引入宿主纤维素酶阴性突变菌株和所述木聚糖酶基因，所述载体质粒和所述宿主突变菌株的杂交质粒 是从链霉菌属的微生物获得的。
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