نتایج جستجو برای: exposure limits
تعداد نتایج: 424661 فیلتر نتایج به سال:
Introduction: Limited studies have been done to evaluate the whole-body vibration (WBV) exposure experienced by Taxi drivers. Therefore, the aim of this study was to evaluate the exposure to whole body vibration and repeated shocks in urban taxi drivers and also to compare different methods of evaluation in this job environment. Material and Method: Measurement and evaluation process were co...
the exposure of workers to magnetic field that occur in aluminum reduction potrooms has been studied. the pattern of magnetic field intensity has been demonstrated along the shop. it has clearly been shown that the personnel working near the pots are exposed to 20-to 1000-gauss magnetic field. to set limits of exposure to magnetic fields, the literature on the biological effects of stationary m...
the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis,a one-way anova experimental design was carried out. 24 sednior students of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inter...
Use of consumer products applying optical radiation (ultraviolet, visible and infrared radiation) sources is growing, in the society which also simplifies everyday ordinary jobs as well as raising the accuracy. There is some phobia in general public on such instruments that have not been approved scientifically. On the other hand optical radiation can cause health hazards especially for eyes an...
Occupational exposure limits (OELs) are tools to help employers protect the health of those who may be exposed to chemicals in their workplace. Under the United Kingdom Control of Substances Hazardous to Health (COSHH) Regulations they define adequate control by inhalation. OELs are set by the Health and Safety Commission (HSC) on advice from its Advisory Committee on Toxic Substances (ACTS) an...
asbestos applications were limited during past two decades in developed nations due to its debilitating health problems, while in developing countries it’s various usages continues. the main goals of present study were evaluation of asbestos concentrations in ambient outdoor and indoor air and occupational exposure, as well as exposure effects on pulmonary function. sampling procedure was ca...
Setting limits for safe exposure to toxic agents in the workplace is a complex process involving science, law, and policy. Development and use of occupational exposure limits (OELs) transcends national interests and international borders. Even though OELs have a lengthy history, and they form the cornerstone of most occupational risk assessment and risk management plans, their effectiveness in ...
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