%0 Journal Article
%T Study on degradation of rice straw by Bacillus licheniformis<br>一株地衣芽孢杆菌对稻草降解作用的研究
%A YAN Hong
%A YANG Qian
%A PAN Zhong-cheng
%A <br>燕红
%A 杨谦
%A 潘忠诚
%J 浙江大学学报(农业与生命科学版)
%D 2007
%I Zhejiang University Press
%X The degradation of rice straw by Bacillus licheniformis was studied, by measuring activities of cellulase and hemi-cellulase, concentration of reducing sugar and soluble total sugar in fermented broth, weight loss, crystallinity, FT-IR and surface structure of residue. The results showed that the process of biodegradation of lignocellulose is actually simultaneous saccharification and fermentation. Cellulase and hemi-cellulase activities reached highest level in 12 h and 48 h, respectively. Concentration of soluble total sugar reached highest level in 4 h, and then decreased with time and maintained invariable level, Meanwhile concentration of reducing sugar decreased with fermentation and then maintained invariable level. Crystallinity of residue had not obvious change after 5 d cultivation. FT-IR spectrum of residue showed that B. licheniformis degraded cellulose, hemi-cellulose and lignin in rice straw in some extent,After 5 d cultivation, the degradation ratio of cellulose, hemi-cellulose and lignin in rice straw were 14.91%, 6.61% and 1.42%, respectively. Scanning electron microscope observation of surface structure of degraded rice straw by B. licheniformis showed that thin-walled cell of rice straw became wrinkled and wizen.
%K Bacillus licheniformis
%K rice straw
%K cellulase
%K degradation<br>地衣芽孢杆菌
%K 稻草
%K 纤维素酶
%K 降解
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=298920A27C9BAA22346FCA384240FAA4&jid=466C05D88593309B3EB5CF34361E6426&aid=FC226B1E764D12B3&yid=A732AF04DDA03BB3&vid=27746BCEEE58E9DC&iid=E158A972A605785F&sid=5DCBAAB000A70168&eid=2E41258BCB9A7DB2&journal_id=1008-9209&journal_name=浙江大学学报(农业与生命科学版)&referenced_num=1&reference_num=9