The effects of organophosphorus and carbamate pesticides were examined inhibition of the acetylcholinesterase activity in the chicken brain with enzyme - inhibition methods. The acetylcholinesterase activity in chicken brain determined by the Ellman method was 167 μmol/min/g protein. The optimum pH of acetycholinesterase was 8.2. pI_50 of acetycholinesterase by some organophosphorus were 3.80M of phosphorodithioate, 4.04M of phosphorothioate, 6.33M of phosphate, and 6.60M of phosphrothiolate. pI_50 of acetycholinesterase by some carbamates were 5.10M of XMC, 5. 90M of carbofuran, 6.16M of isoprocarb, 6.30M of carbaryl, 6.47M of BPMC, and 6.77M of propoxur. pI_50 of carbamates selected was similar to that of phosphorothioate and phosphate organophosphates

• 김정호(경산대학교 환경학부) | Jung-Ho Kim (Faculty of Environmental Science and Engineering, Kyungsan University)
• 김영호(혜전전문대학 호텔제과제빵과) | Young-Ho Kim (Dept. of Hotel Baking Science and Technology, Hyejeon Junior College，)