supported by the Department of Education of Zhejiang Province,China (Natural Science Project,No. 20070138);the Zhejiang Provincial Natural Science Foundation of China (No. Y307448)
In vivo activity of cholinesterase (ChE) in Daphnia magna was measured at different time points during 21-day exposure to triazophos and chlorpyrifos ranging from 0.05 to 2.50 μg/L and 0.01 to 2.00 μg/L, respectiv...