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Despite well-known adverse effects associated with cigarette smoking, approximately 20% of the US population continues to smoke and many more are exposed to environmental tobacco smoke. Many of the same individuals are also exposed to environmental neurotoxic chemicals such as the organophosphorus insecticide chlorpyrifos. In the present study, the effects of exposure to low doses of nicotine and...
Broods of day-old mallard (Anas platyrhynchos) duckings were led through 200 m of grassland vegetation that had been sprayed with emulsifiable formulations of either dimethoate (480 g a.i. ha−1) or chlorpyrifos (420 g a.i. ha−1) or left unsprayed (control). The broods were subsequently observed on a pond during four 2--3 h periods over the next 2 days and their activities systematically recorded....
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