Some biochemical changes brought about hy nral administration of the pesticides like sevin, rogor and carhofuran to adult male rats were studied. Increase in blood sugar and corum tranesmingos activities were observed in the acute experiment with all the pesticides. Brain acetyl cholinesterase was affected to a greater extent in the acute experiment than in subacute experiment. Six days after the administration of carbofuran at 10mg/Kg body weight the activity of brain cholinesterase was still 45 per cent lece than the normal activity.
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