C. Michael Lewis

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Mevinphos (trade name, Phosdrin), a category 1 organophosphorus insecticide, has been used mainly as a cleanup pesticide for vegetable crops. A risk assessment for occupational and dietary exposure to mevinphos was initiated because of the high acute toxicity of the compound. Repetitive dosing with mevinphos did not cause any discernible histopathological(More)
Over a 4-month period, 950 samples of treated drinking water were analyzed for total coliforms (TC) and Escherichia coli by both membrane filtration (MF) and Autoanalysis Colilert presence-absence (AC) techniques. The two tests agreed 97% of the time on the basis of presumptive TC results and 98.5% of the time on the basis of verified TC results. Samples(More)
Exploratory research into the role of visual and verbal working memory in diagrammtic reasoning is presented. Eighty subjects participated in an experiment where thirty-four different gain/loss problems were represented in sentential and graphical form. In order to test the role of each component of Baddeley’s model of working memory, subjects performed(More)
9. De Moraes, C. M., Lewis, W. J., Paré, P. W., Alborn, H. T. & Tumlinson, J. H. Nature 393, 570–573 (1998). 10.Du, Y. et al. J. Chem. Ecol. 22, 1591–1606 (1996). single person’s IQ-test performance (assuming a test reliability of 0.95, the 50% confidence interval would be 4.5 IQ points wide). To account for the Mozart effect, Rauscher’s group appealed to a(More)
Propetamphos is an organophosphate insecticide that is registered in California primarily for<lb>structural pest control. A total of 371 illnesses associated with the use of propetamphos alone or<lb>in combination with other pesticides have been reported in California from 1982 to 1993. The<lb>reported illnesses were predominantly for non-pesticide(More)
S,S,S-Tributyl phosphorotrithioate (tribufos) is an organophosphate chemical which was first registered in 1960 for cotton defoliation (U.S. EPA, 1981). Tribufos induces early leaf abscission through changes in the levels of plant hormones. Defoliation occurs 4 to 7 days after treatment. Dietary exposure to tribufos may occur from consumption of cottonseed(More)