Raymond W. Lawton

Learn More
Certain former operations in capacitor manufacturing resulted in extensive direct contact of the workers with electrical grade polychlorinated biphenyls (PCBs). A study group of 194 such individuals, all exposed to Aroclor 1016 and many previously exposed to Aroclors 1242 and/or 1254, was examined before (1976) and after (1979) discontinuance of PCB use in(More)
The 95% prediction interval for single measurements of serum "Aroclor" reported by a reputable commercial analyst was found to be approximately +/- 42%. The geometric mean serum PCB levels in a population of capacitor workers who had formerly had direct exposure to the commercial PCBs--Aroclors 1016, 1242, and 1254-were found to be alternatively reportable(More)
Spirometric findings (forced vital capacity [FVC], forced expiratory volume at one second [FEV1], FEV1/FVC) in a population of capacitor workers with occupational exposure to polychlorinated biphenyls (PCBs) are described during active PCB use (1976) and following the PCB ban (1979 and 1983). The initial finding of restrictive impairment (16%) in 1976 was(More)
Analysis of the kinetics and congener selectivities for PCB metabolism in occupationally exposed workers shows that the lipid PCB concentrations required for the induction of P4502B cytochromes must be > 20 mg/kg; for inducing P4501A and the associated toxic effects, > 600 mg/kg. The observed kinetic behavior indicates that the reported statistical(More)
EASUREMENTS of the elasticity of isolated aortic specimens are complicated by the nonlinear mechanical behavior of such tissues. Nonlinearity occurs in both static and dynamic measurements. Krafka, 1-2 in a series of studies on the static elasticity of isolated aortic strips, computed 3 elastic moduli, each at a different elongation. These moduli differed(More)