纤维素降解过程中金属离子作用的研究  

Study of effect of Metal Ions on Cellulose Degradation

作　　者：李金花[1] 程远征[1] 张洪林[1] 

机构地区：[1]曲阜师范大学化学科学学院,山东曲阜273165

出　　处：《临沂师范学院学报》2005年第3期30-32,共3页Journal of Linyi Teachers' College

摘　　要：用微量量热法研究了7种金属离子及几种混合离子对纤维素酶降解纤维素反应的影响.实验结果表明,在pH=4.60,T=310K时,相同浓度的离子中Li+、Na+、K+、Ni2+、Zn2+、Co2+离子均表现出抑制作用,其中Li+抑制作用显著;Cu2+有明显的激活作用.当Li+、Na+、K+3种离子混合共同作用于反应时,表现出激活作用;当Ni2+、Cu2+、Zn2+3种离子,Co2+、Ni2+2种离子混合共同作用于反应时,表现出抑制作用.In this paper the effect of seven kinds of metal ions and the mixed ones on cellulose degradation by cellulase was studied by microcalorimetry. The results showed： When T=310 K pH=4. 60 and the concentration of metal ions was the same, Li^＋, Na^＋ , K^＋ , Ni^2＋ , Zn^2＋ , Co^2＋ had some inhibition on the cellulase,among which Li^＋ had obvious inhibition. Contrarily, cellulase was activatedby Cu^2＋, Cellulase was activated by the mixture of Li^＋,Na^＋ ,K^＋. While the mixture of Ni^2＋ ,Cu^2＋ ,Zn^2＋ and that of Co^2＋ , Ni^2＋ had inhibitive effect on cellulase.

关 键 词：微量量热法 纤维素 纤维素酶 金属离子 抑制 激活 

分 类 号：O64[理学—物理化学]