摘要
从降解菌ＹＦ１１中提取了降解酶并测定了该降解酶对对硫磷、甲基对硫磷和杀螟松的降解特性．对硫磷和甲基对硫磷酶促降解的最适ｐＨ均为８．０，杀螟松的最适ｐＨ为８．５，最适温度为３２．５℃．该降解酶对对硫磷、甲基对硫磷和杀螟松的米氏常数分别为１８７．２、２０５．５和２１２．
Degradation characteristics of parathion,parathion methyl and fenitrothion by a enzyme,extracted from the isolated strain YF11,was determined.The optimum pH of enzymatic degradation for parathion and parathion methyl is 8 0,and that for fenitrothion is 8 5.The optimum temperature of enzymatic degradation for the insecticides is 32 5℃.Michaelis Mentn's constant( K m) of the enzyme for parathion,parathion methyl and fenitrothion are 187 2,205 5 and 212 4nmol/ml,respectively.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1998年第2期58-61,共4页
Environmental Science
基金
国家自然科学基金
关键词
微生物
酶促降解
磷酸酯杀虫剂
杀虫剂
microorganism,enzymatic degradation,parathion,parathion methyl,fenitrothion,Michaelis Mentn's constant.
