2. Materials and methods 2.1. Chemicals reagent The commercial formulation of the organophosphorous pesticide Folidol 600 (methyl parathion 600 g L1) was used. All chemicals and reagents were supplied by Sigma Chemical Co., Merck, and Mallinckrodt.
2. Materials and methods2.1. Chemicals reagentThe commercial formulation of the organophosphorous pesticideFolidol 600 (methyl parathion 600 g L1) was used. All chemicalsand reagents were supplied by Sigma Chemical Co., Merck,and Mallinckrodt.