Measuring Dust Exposure with the Thermal Precipitator in Collieries and Foundries

Measuring dust exposure with the thermal precipitator in collieries and foundries.

The standard thermal precipitator has been modified for field surveys of airbome dust exposureso as to make it more portable. A microprojector is used when assessing the samples and for coal-mine dusts the counts are restricted to the range 0 5 to 5 microns. In industrial environments the dust concentration appears to vary with a standard deviation of more than 50% of the mean. Part of this var...

The use of a size selector for dust sampling with the thermal precipitator.

Ideally, in order to relate dust concentrations expressed in terms of one parameter, e.g., number per unit volume, with those expressed in terms of another parameter, e.g., mass per unit volume, the particles counted by microscope in a thermal precipitator sample should be within the same size range as samples collected by other means for the determination of mass concentration. It is generally...

the past hospitalization and its association with suicide attempts and ideation in patients with mdd and comparison with bmd (depressed type) group

چکیده ندارد.

Assessment of Occupational Exposure to Dust and Crystalline Silica in Foundries

BACKGROUND The term "crystalline silica" refers to crystallized form of SiO2 and quartz, as the most abundant compound on the earth's crust; it is capable of causing silicosis and lung cancer upon inhaling large doses in the course of occupational exposure. The aim of this study was to assess occupational exposure to dust and crystalline silica in foundries in Pakdasht, Iran. MATERIALS AND ME...

Control of Silica Exposure in Foundries