Two fungi, wich produced an acid and an alkaline-stable xylanase, were isolated from soil and identified as strains of Aspergillus niger. The basic characteristics of both xylanases were studied and the conditions of pretreating wheat straw pulps with xylanases were also optimized. The results showed that enzyme-pretreated pulps can obtain higher brightness, or 20%-30% of hypochlorine can be reduced at the same final brightness level. It can be predicted that xylanase has a great potential economic and environmental benefits in non-wood pulp bleaching in the near future.

Zymograms of the cultural supernatant of Aspergillus niger 149 showed xylanase^s two bands tentatively named X-I and X-II. X-I and X-II were purified to PAGE homogenity by (NH_(4))_(2)SO_(4) fractionation and DEAE-Sephadex A50 column chromatography. The molecular mass of X-I and X-II estimated by SDS-PAGE and concentration gradient PAGE and 37kDa, 76kDa, 24kDa and 23kDa, respectively. X-I and X-II contained 27.6% and 7.3% carbohybrate residues, respectively.

Annals of the New York Academy of SciencesVolume 542, Issue 1 p. 192-194 A Strain of Paecilomyces lilacinus Producing High Quality Dextranase JINWU SUN, JINWU SUN Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this authorXIULAN CHENG, XIULAN CHENG Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this authorYAN ZHANG, YAN ZHANG Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this authorZIZHENG YAN AND, ZIZHENG YAN AND Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this authorSHUZHENG ZHANG, SHUZHENG ZHANG Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this author JINWU SUN, JINWU SUN Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this authorXIULAN CHENG, XIULAN CHENG Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this authorYAN ZHANG, YAN ZHANG Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this authorZIZHENG YAN AND, ZIZHENG YAN AND Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this authorSHUZHENG ZHANG, SHUZHENG ZHANG Institute of Microbiology Academia Sinica Beijing, ChinaSearch for more papers by this author First published: December 1988 https://doi.org/10.1111/j.1749-6632.1988.tb25827.xCitations: 4AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article.Citing Literature Volume542, Issue1Enzyme Engineering 9December 1988Pages 192-194 RelatedInformation

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