نتایج جستجو برای: exposure control
تعداد نتایج: 1589292 فیلتر نتایج به سال:
Background and Aim : Occupational exposure may predispose health care workers to acquiring hepatitis B, C and HIV via the skin and mucous membranes when they expose to blood and body fluids .The best preventive measure in this respect is taking universal precautions. In the wards where occupational exposure is more likely-such as dialysis, operation room, emergency, and labour-these precautio...
Background: This study aimed to investigate the inhibitory effects of simultaneous formaldehyde (FA) and noise exposure on the sperm kinematic parameters sexual hormones in male mice. Materials and Methods: Forty eight NMRI adult male mice were randomly assigned to control group and experimental groups which were exposed to formaldehyde vapour (10 ppm) (F), noise (100 dB) (N), and simultaneous ...
Background The aim of this study was to investigate the effect of applying the 1-mT magnetic field (MF) in the ovarian tissue vitrification. MaterialsAndMethods Ovaries of 6-8 week-old Naval Medical Research Institute female mice randomly were divided into 5 groups: V1: Ovaries that immediately after leaving of the mice body, were examined histologically (control group), V2: Ovaries that withou...
this was a cross-sectional case-control study in which the effect of night-time ambient light on prevalence of myopia in patients with a history of exposure to night-time light during sleep throughout the first three years of their lives was investigated in 2008. two hundred children aged 3-15 years who were brought to our eye clinic at boo-ali hospital for ophthalmic examination investigated a...
[no abstract available]
Introduction: light intensity and duration are physical factors that affect hormone secretion and circadian rhythms. This study aimed to determine the effects of various light intensities on serum melatonin and cortisol levels. Materials and methods: This experimental study was carried out on 32 male rats: Group 1 as the control group, received a brightness of 150 lux, and groups 2, 3, and ...
Background: This study aimed to investigate the inhibitory effects of simultaneous formaldehyde (FA) and noise exposure on the sperm kinematic parameters sexual hormones in male mice. Materials and Methods: Forty eight NMRI adult male mice were randomly assigned to control group and experimental groups which were exposed to formaldehyde vapour (10 ppm) (F), noise (100 dB) (N), and simultaneous ...
Introduction: Lead is a toxic metal found in the Earth's crust and has been used by humans for 7,000 years due to its high density, flexibility and strength, and low melting point. The widespread use of this metal in industry and the exposure of workers has led to widespread environmental pollution and public health problems in many parts of the world. Due to the widespread use of lead in vario...
health care workers (hcw) are at high risk of occupational exposure from blood-borne pathogens. the most important pathogens that can be transmitted to hcw are hiv with prevalence of 2.24 per 100000, hbv with prevalence of 2.3%, and hcv with prevalence of 0.2% in iran. most of this occupational transmission can be prevented through standard precautions reducing exposure. these precautions, howe...
the aim of this cross-sectional study was to explore the association of crystalline silica aerosols exposure with malondialdehyde in blood serum and urinary neopterin and explore their potential as biomarkers of their external exposure. nonsmoking and healthy male glass sandblasters and control population were randomly selected for this study. all groups were monitored for their personal exposu...
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