Level of Silica in the Respirable Dust Inhaled by Dental Technicians with Demonstration of Respirable Symptoms.
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چکیده
منابع مشابه
Level of silica in the respirable dust inhaled by dental technicians with demonstration of respirable symptoms.
Dental technicians are exposed to various dusts in working laboratories. This study was conducted to measure level of silica in the respirable dust generated from dental fixed prosthodontics manufacturing processes using Fourier Transform Infrared Spectroscopy (FTIR), and to compare their occurrence of respiratory symptoms with that of non-dental hospital workers (control group). Respirable dus...
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ROBERT A. HANEY Mine Safety and Health Administration, Pittsburgh Health Technology Center The effectiveness of these dust control techniques has been evaluated primarily through the use of instantaneous dust measurements. These instantaneous dust measurements give a relative indication of whether dust control and -------------------~ employee exposure improve or deteriorate. Because the instan...
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PURPOSE To assess the relative efficacy of three types of controls in reducing respirable silica exposure during artificial stone countertop cutting with a handheld circular saw. APPROACH A handheld worm drive circular saw equipped with a diamond segmented blade was fitted with water supply to wet the blade as is typical. The normal wetted-blade condition was compared to (i) wetted-blade plus...
متن کاملDetermining of crystalline silica in respirable dust samples by infrared spectrophotometry in the presence of interferences.
Infrared Spectrophotometry (IR) is now widely used to determine crystalline silica in industrial dust samples. Though the IR method has many advantages when dealing with respirable dust samples, some serious analytical errors are often caused by interference minerals contamination. These minerals have a characteristic absorption band corresponding in position to the analytical peak for crystall...
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Personal 8-h shift exposure to respirable dust, diesel engine exhaust emissions (DEEE) (as respirable elemental carbon), and respirable crystalline silica of workers involved in constructing an underground metro railway tunnel was assessed. Black carbon (BC) concentrations were also assessed using a MicroAeth AE51. During sprayed concrete lining (SCL) activities in the tunnel, the geometric mea...
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ژورنال
عنوان ژورنال: INDUSTRIAL HEALTH
سال: 2002
ISSN: 0019-8366,1880-8026
DOI: 10.2486/indhealth.40.260