文章基本信息

标题：Immobilization of A 22kDa Xylanase on Eudragit L-100 for Xylo-oligosaccharide Production
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作者：Lifen Hou ; Xiangyang Sun ; Jixue Sui 等
期刊名称：Advance Journal of Food Science and Technology
印刷版ISSN：2042-4868
电子版ISSN：2042-4876
出版年度：2015
卷号：7
期号：6
页码：401-407
出版社：MAXWELL Science Publication
摘要：A commercial xylanase was immobilized on Eudragit L-100 with the recovery activity of 87.3-126.2%. After immobilization, the optimum pH was not changed while its optimum temperature moved from 70 to 75°C. However, the immobilized enzyme did not show a higher thermal stability than the free xylanase. A slightly decrease in the km values of free enzyme was observed upon immobilization. Meanwhile, Vmax values of the immobilized enzyme were 38% higher than those of the free xylanase. The result of Fluorescence spectroscopy used to probe the changes in the enzyme structure upon immobilization showed minute change and which may result in increase of immobilized enzyme activity. The application of immobilized enzyme hydrolyzing cottonseed husk and corncob pretreated by alkaline peroxide solution was the basically same as the free enzyme. The reusability of immobilized enzyme in the third cycles produced 163 and 126% reducing sugar hydrolyzing cottonseed husk and corncob.
关键词：Application ; eudragit L-100 ; immobilization ; properties ; Xylanase ;