Mixed activation and mixed inhibition of the oxidoreductase activity of Rhus vernicifera laccase by different Pd^(2+) ion concentration  

作　　者：涂楚桥 梁宏 王光辉 

出　　处：《Chinese Journal of Chemistry》1999年第5期448-453,425,共7页中国化学（英文版）

基　　金：Natural Science Foundation of Guangxi (No.9743018)

摘　　要： Kinetic experiments were performed to study the effects of Pd2+ ion on the oxidation of 5,6-dibro-mo-2,3-dicyanohydroquinone catalyzed by Rhus vernicifera laccase under condition of pH 4.5 and 30 × 0. 1℃ . The results showed that the mixed activation could be observed when Pd2+ ion was at low concentrations. The competitive and non-competitive activation constants were 9 × 10 and 2 × 10-6 mol/L, respectively. With the increase of Pd2+ ion concentration, the activation was gradually converted into mixed inhibition, and the competitive and non-competitive inhibition constants were 6 × 10-6 and 32 × 10-6 mol/L, respectively.Kinetic experiments were performed to study the effects of Pd2+ ion on the oxidation of 5,6-dibro-mo-2,3-dicyanohydroquinone catalyzed by Rhus vernicifera laccase under condition of pH 4.5 and 30 × 0. 1℃ . The results showed that the mixed activation could be observed when Pd2+ ion was at low concentrations. The competitive and non-competitive activation constants were 9 × 10 and 2 × 10-6 mol/L, respectively. With the increase of Pd2+ ion concentration, the activation was gradually converted into mixed inhibition, and the competitive and non-competitive inhibition constants were 6 × 10-6 and 32 × 10-6 mol/L, respectively.

关 键 词：Rhus vernicifera laccase palladium(Ⅱ) mixed activation mixed inhibition. 

分 类 号：TQ630[化学工程—精细化工]