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Excessive production of active oxygen radicals by macrophages is proposed to play an important role in asbestos-related diseases. The purpose of this study was to examine the capacity and mechanisms of action of various forms of asbestos to stimulate superoxide anion production by guinea pig alveolar macrophages. Chrysotile, but not the amphiboles(More)
The 1980 National Natality Survey (NNS) and 1980 National Fetal Mortality Survey (NFMS) provide a unique opportunity to examine variation in exposure to radiation during pregnancy for mothers of live-born and stillborn infants. Maternal race, age, education, and marital status in both surveys and low birth weight in the 1980 NNS are characteristics used to(More)
Three organophosphate compounds, dichlorvos, parathion and diisopropylfluorophosphate were tested as an unconditioned stimulus in the conditioned taste aversion (CTA) test. All organophosphates caused a dose-dependent CTA in rats at doses which did not induce any other signs of toxicity. Experiments with dichlorvos showed that the minimum dose which caused(More)
An experimental study performed to evaluate the atmospheric transmission model FASCODE and its water vapor continuum [Clough, Kneizys, and Davies (CKD) model, Atmos. Res. 23, 229-241 (1989)] in the 850-2250-cm-(1) spectral region is presented. The analysis is based on a comparison between model calculations and transmission measurements carried out at the(More)
Simulations have been made of atmospheric-transmittance spectra over a 5.1-km sea-level path measured by the Naval Research Laboratory, Washington, D.C. New CO(2) line-profile form factors were used that had been obtained previously from experiment. The simulations were found to agree well with the field spectra, supporting the validity of the CO(2) line(More)