Within the last two years, four pre-bypass filters of relatively the same design and performance characteristics were introduced into the cardiopulmonary bypass market. Two, the Harvey H-600 and the Delta Medical PB-005t pre-bypass filters were previously studied by this author 1• A determination was made of the type and number of particles released from different oxygenation systems. Additiona...

BACKGROUND Worldwide, the frequency of invasive fungal infections has been increasing, with a corresponding increase in the numbers of high-risk patients. Exposure reduction through the use of high-efficiency particulate air (HEPA) filters has been the preferred primary preventive strategy for these high-risk patients. Although the efficiency and benefits of fixed HEPA filters is well proven, t...

This paper introduces a class of high-speed wide-band frequency masking recursive digital filters with approximately linear-phase. These filters feature a high maximal sample frequency, low computational complexity, and good numerical properties.

The partitioning of polycyclic aromatic hydrocarbons (PAHs) between the particulate and gaseous phases resulting from the combustion of polystyrene was studied. A vertical tubular flow furnace was used to incinerate polystyrene spheres (100-300 μm) at different combustion temperatures (800-1200 °C) to determine the effect of temperature and polystyrene feed size on the particulate and gaseous e...

Management of asthma requires attention to environmental exposures both indoors and outdoors. Americans spend most of their time indoors, where they have a greater ability to modify their environment. The indoor environment contains both pollutants (eg, particulate matter, nitrogen dioxide, secondhand smoke, and ozone) and allergens from furred pets, dust mites, cockroaches, rodents, and molds....

Particulate matter (PM) is an important player in indoor air quality. Even though PM limit values are force for more than a decade Europe and reference methods well place ambient air, measuring concentration still remains challenge standardizing measurement protocol complex. As people stay most of their time indoors, great interest terms public health, as can be drastically different to the one...