Exposure to airborne beryllium can lead to adverse health effects in humans. Consequently, many countries have legislation in place to ensure the health and safety of workers and the wider environment. Because even very low concentrations of Be in air constitute a toxic threat to health, analytical methodology that is capable of extremely high-sensitivity measurement is required. Although trace...

Many studies have attempted to evaluate the importance of airborne fungi in the development of invasive fungal infection, especially for immunocompromised hosts. Several kinds of instruments are available to quantitate fungal propagule levels in air. We compared the performance of the most frequently used air sampler, the Andersen sampler with six stages, with a portable one, the Reuter centrif...

Lead concentrations were measured in surface dust, airborne dust, air, and grinding material from five engine reconditioning workshops to evaluate the impact on blood lead concentrations (PbB) of 10 employees. Lead in the environmental samples ranged from trace amounts to extremely high concentrations (4667 mg/m2). The highest concentrations in surface wipes were found in areas where engine dep...

Nanofibre filters may offer new properties not available in commercial fibre filters. These include a higher surface area and the ability to novel materials within fibres. In addition small size allows potential gains performance due slip-flow phenomenon which normal gas viscosity does apply objects smaller than mean free path of gas. We tested electrospun generated from polyvinyl alcohol solut...

BACKGROUND Beryllium is known to be toxic to the lungs, causing beryllium lung disease and associated with increased lung cancer risk. Airborne beryllium exposures have been monitored since the 1940s. This study describes methods used to measure airborne beryllium concentrations and how historical measurements from a beryllium manufacturing plant were used to estimate workers' exposures in a lu...

altered in many ways with the view to cut down weight and cost and to ensure simplicity. It consists of two parts : (a) the ftiotor and blower ; (b) the ether apparatus. A.?The air current is supplied by an electric motor of | h.p., driving a rotary blower, and is made to pass from the blower through an air filter, and then through a two-necked Wolff's bottle half-filled with water. The air fil...

F R O M the very inception of contemplated space flight, the Air Force has been vitally interested in research directed toward provision of a safe and habitable environment under the hostile conditions of space. The idea of safely sustaining man in a closed system for relatively long periods of time is not particularly new or unique. The Navy has been confronted with this problem for many years...

Aerobiological sampling traditionally uses a volumetric spore trap located in a fixed position to estimate personal exposure to airborne fungi. In this study, the number and identity of fungi inhaled by human subjects (n=34), wearing Intra-nasal air samplers (INASs), was measured over 2-hour periods in an outdoor community setting, and compared to fungal counts made with a Burkard spore trap an...

y Available control technologies and strategies include direct PM2.5 reduction technologies such as fabric filters (baghouses), electrostatic precipitators (ESPs), and diesel particulate filters (DPFs). Once installed, these strategies range in cost-effectiveness from as little as $48/ton PM2.5 to $685/ton PM2.5 (2010$) or more, depending on the source category. However, they also may involve t...