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Results 41 - 50 of 115
Toward developing a new occupational exposure metric approach for characterization of diesel aerosols12/1/2012 - Peer reviewed journal articlesIn this study, the current exposure metric and two additional metrics, the surface area and the total number concentration, were evaluated by conducting simultaneous measurements of diesel ultrafine aerosols in a laboratory setting.
9/17/2012 - Contracts and cooperative agreementsA contract to design and construct an in-mine mobile gas generation plant to extract nitrogen gas from mine air and inject it into sealed mine areas to maintain a safe environment.
CFD modelling of sampling locations for early detection of spontaneous combustion in long-wall gob areas1/1/2012 - Peer reviewed journal articlesIn this study, computational fluid dynamics (CFD) modeling was conducted to optimize gas sampling locations for the early detection of spontaneous heating in longwall gob areas.
1/1/2011 - Book chaptersWhile approaches to workplace aerosol measurement differ; this book chapter emphasizes the basic sampling philosophies and methods used routinely in the workplace and the application of direct-reading monitors.
1/1/2011 - Book chaptersGases and fumes are generated as a result of explosives detonation at a blast site. This chapter discusses only those gases produced by the detonation of commercial explosives.
1/1/2011 - Peer reviewed journal articlesThirteen coals of different rank were tested for ignition propensity in a 20-L explosion chamber simulating oxyfuel combustion gas conditions. The effects of coal type, coal concentration, O2 in CO2 atmospheres, and particle size were investigated.
7/1/2010 - Peer reviewed journal articlesAn air quality survey was conducted at a precious metals refinery in order to evaluate worker exposures to airborne metals and to provide detailed characterization of the aerosols.
6/1/2010 - Peer reviewed journal articlesResearchers at NIOSH are developing methods for characterizing ultrafine aerosols in workplaces. One method includes the detailed analysis of collected particles using electron microscopy (EM).
The Effects of Passive Diesel Particulate Filters on Diesel Particulate Matter Concentrations in Two Underground Metal/Nonmetal Mines6/1/2010 - Conference papersIn this study, NIOSH measured the atmospheric concentrations of DPM and gases in two mines in order to evaluate the effects of various control strategies on the atmospheric DPM concentrations.
3/1/2010 - Peer reviewed journal articlesThis work presents a fractal porous medium model to predict gob porosity and permeability for controlling methane flow and to predict air leakage into the gob.