نتایج جستجو برای: exposure limits
تعداد نتایج: 424661 فیلتر نتایج به سال:
introduction blue light is a part of the spectrum with the highest energy content, which can reach the retina. the damage that it can cause to the retina is called photochemical or blue-light retinal injury. for the retinal injury assessment of the photochemical and aphakic retinal hazards in the wavelength range of 300-700 nm, use of effective spectral radiance limits (w.m-2.sr-1) seems to be ...
Background and purpose: PAHs are the most important pollutants of groundwater resources. Therefore, this study aimed at determining the PAHs concentrations in water samples exploited from wells near gas stations in Hamadan, Iran. Materials and methods: We collected 52 water samples from 30 cm depth of the wells from 13 gas stations in winter and spring in 2012. The extraction and identificatio...
Background and aim: Magnetic resonance imaging as one of the best medical scanning technique is considered to be the most important sources of static magnetic fields. The staffs of MRI ´s units frequently exposed to these static magnetic fields. This study aims to determine the occupational exposure level to mentioned field and its related health effects in MRI´s units. Methods: The occup...
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