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Comparative toxicity of some pesticides on human health and some aquatic species.

Inhibition studies have been carried on the hydrolysis reactions catalyzed by cholinesterases taken from electric eel, human and horse serums by Sevin, Aldrin and Malathion. Three esters of p-nitrophenol have been used as substrates. The degree of inhibition has been used as a measure of the comparative toxicity of these pesticides on these cholinesterases.