face: a free-air facility for fumigation with gaseous air pollutants: revision

a computer-controlled open air test facility is described which is capable of maintaining pollutant gas concentrations at preset levels while allowing natural fluctuations in solar radiation, precipitation, wind conditions, temperature, and relative humidity the system has been used successfully in various configurations with so(sub 2), c..

byssinosis and small airways disease, terminal progress report

in a study of byssinosis and small airway diseases, pulmonary function measurements including helium (7440597) and oxygen (7782447) flow volume curves were made on 470 cotton mill employees exposed to various dust levels. the employees in these cotton mills had been screened previously for pulmonary abnormalities, and some employees had m..

dynamic model for forecasting new cloud development. final rept. 1 nov 87-19 dec 88

the primary goal of this research is to develop a mesoscale model capable of predicting regions of convective outbreak. the model is to be initialized by a simple soundings(s) and during the data assimilation period single doppler radar data are to be assimilated into the model fields. the model should be capable of producing forecasts of..

animal model validation studies. final rept

the project objectives were the development of a system to be used for exposing small laboratory animals to the respirable fraction of cotton dust found in a cotton mill, and testing an animal model of byssinosis which could be used to study the development of the disease in humans. the final report contained 10 published papers of the re..

applications of free-air co(sub 2) enrichment (face) technology to a forest canopy

forest ecosystems occupy an important fraction of the planet's land cover. understanding their exchanges of carbon with the atmosphere is crucial in projecting future net atmospheric co(sub 2) increases. it is also important that experimental studies of these processes be performed under conditions which are as realistic as possible, part..

improvements of formation evaluation and reservoir engineering in tight gas sands through selected core analysis procedures. annual report, october 1989-december 1990

core analyses of samples obtained from the travis peak, cotton valley and frontier formation have been performed to investigate the effects of the microfracture system on permeability anisotropy in tight gas sands. preliminary results of these analyses indicate that directional permeability measurements are influenced by both natural and ..

niosh testimony to dol on the occupational safety and health administration's proposed rule on accreditation of training programs for hazardous waste operations by b. d. hardin, january 29, 1991

the testimony concerned the proposed training programs for hazardous waste handling. niosh recently submitted a number of studies relating to the training of workers involved in the manufacture and processing of highly hazardous chemicals. niosh conducted a course approval program for pulmonary function testing pursuant to the medical sur..

effects of in-stream mining on channel stability. volume 3 appendices. rept. for aug 86-jun 89

the report contains the appendices to volume ii, final report, addressing the impacts of in-stream sand and gravel mining on channel stability in arizona. the information contained in the appendices provides further documentation in support of the major chapters of the final report. topics addressed in the appendices include: summary of r..

free-air carbon dioxide enrichment: a new approach to research on carbon exchange processes

terrestrial-atmospheric carbon balances are currently poorly understood and are vital for predicting future trends in the global carbon budget. uncertainties in c exchange rates can best be reduced by realistic experiments to determine flux rates in managed and natural ecosystems. such experiments must minimize any artificiality imposed b..

niosh comments to dol post-hearing brief on the occupational safety and health administration's proposed rule on occupational exposure to cotton dust by r. a. lemen, december 14, 1983

the testimony summarized the position of niosh concerning the proposed rule on occupational exposure to cotton dust. topics included cotton dust concentrations, medical surveillance data in knitting and hosiery mills. niosh has reviewed the protocol submitted to osha regarding alternative sampling devices for cotton dust problems concerni..