|本期目录/Table of Contents|

[1]李丽娟,马贵平,夏文静.碳纳米管固定化纤维素酶的酶学性质[J].江苏农业科学,2020,48(23):275-279.
 Li Lijuan,et al.Enzymatic properties of cellulase immobilized on carbon nanotubes[J].Jiangsu Agricultural Sciences,2020,48(23):275-279.
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碳纳米管固定化纤维素酶的酶学性质(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第48卷
期数:
2020年第23期
页码:
275-279
栏目:
资源与环境
出版日期:
2020-12-05

文章信息/Info

Title:
Enzymatic properties of cellulase immobilized on carbon nanotubes
作者:
李丽娟1马贵平1夏文静2
1.乌兰察布医学高等专科学校,内蒙古乌兰察布 012000; 2.南京师范大学泰州学院,江苏泰州 225300
Author(s):
Li Lijuanet al
关键词:
碳纳米管固定化纤维素酶固定化酶酶学性质酶活力
Keywords:
-
分类号:
S188+.3
DOI:
-
文献标志码:
A
摘要:
纤维素酶在环保型燃料乙醇的生产、中药成分提取、食品、饲料、酿酒、石油开采、环境保护等行业都具有一定的应用前景,但由于纤维素酶的生产成本较高、生物活力较低,使得纤维素酶的应用受到了局限。然而,固定化酶技术可以使酶重复利用,降低生产成本,克服这一技术瓶颈。研究了多壁碳纳米管固定化纤维素酶的酶学性质和重复使用性,并与游离酶的酶学性质做比较。结果表明,固定化纤维素酶的最适温度为50 ℃,最适pH值为3.0,60 ℃放置120 min仍保持70%以上的原酶活力;通过动力学模型研究发现,固定化酶的米氏常数(Km)值为0.588 mmol/L,较游离酶稍有增加;固定化酶于4 ℃下放置1个月,酶活力仍保持原酶活力的68%以上;固定化酶用于连续水解羧甲基纤维素,经过6轮重复使用,固定化酶活力仍保持50%以上。与游离酶相比,固定化纤维素酶具有更宽的温度范围,更好的热稳定性及耐酸碱性,良好的储存稳定性及重复利用性。
Abstract:
-

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-04-01
基金项目:内蒙古自治区高等学校科学研究项目(编号:NJZY17574)。
作者简介:李丽娟(1984—),女,内蒙古乌兰察布人,硕士,副教授,主要从事酶工程相关研究。E-mail:lilij2002@126.com。
更新日期/Last Update: 2020-12-05