نتایج جستجو برای: exposure limit
تعداد نتایج: 491019 فیلتر نتایج به سال:
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...
Abstract Introduction: Mobile phones create high-frequency electromagnetic fields around them when in use. The close proximity of mobile phones to the user’s head leads to the absorption of part of the electromagnetic waves into the head and the brain. Methods: We have elucidated the alteration in cognitive function of the male and female offspring rats, which were exposed to chronic mobi...
Milk would be contaminated with Aflatoxin M1 (AFM1) if it was obtained from lactating animal which fed with feedstuffs containing Aflatoxin B1 (AFB1). AFM1 is classified as group 2B, possibly carcinogenic to humans and exposure to AFM1 through milk consumption is a public concern. The purpose of this study was to determine the AFM1 exposure through liquid milk consumption for adult consumers in...
Milk would be contaminated with Aflatoxin M1 (AFM1) if it was obtained from lactating animal which fed with feedstuffs containing Aflatoxin B1 (AFB1). AFM1 is classified as group 2B, possibly carcinogenic to humans and exposure to AFM1 through milk consumption is a public concern. The purpose of this study was to determine the AFM1 exposure through liquid milk consumption for adult consumers in...
Background & objectives: Work-related illnesses account for a large number of social problems. According to occupational therapists, occupational diseases are considered as life-threatening factors for workers. The aim of this study was to measure air pollution to suspended particles and to assess the health risk of PM2.5 and PM10 exposure in the textile industry. Methods: This analytical-cros...
Background and aims: The term "crystalline silica", refers to crystallized form of SiO2 and quartz, as the most abundant compound in earth crust.I It can cause silicosis and lung cancer following inhalation of large doses in course of occupational exposure. Silica exposure is unavoidable during demolition of buildings and therefore it can lead to many problems for demolition workers’ health. ...
Introduction: Fork-lifts are considered as one of the main sources of vibration at workplaces. Due to importance of the risks from exposure to vibration, the present study was aimed to investigate health risk due to exposure of fork-lift drivers to whole body vibration at two position with load and without load in an Automobile industry. Method: In this cross sectional study, the evaluation of...
Background and Aim: Occupational exposure to noise in the workplaces is a significant health problem and cardiovascular disease is one of the most important and common non-communicable diseases and one of the main causes of premature death. In addition to hearing impairments, noise as a stressor may cause cardiovascular problems, high blood pressure, nerve stimulation, stress and hormonal dis...
Background & Objectives: Many studies were conducted to determine the effects of heat stress on human performance. However, they could not reach a decisive conclusion, mainly due to a large variation in experimental conditions and tests. This study investigated cognitive performance of university students exposed to different levels of heat stress under laboratory condition. Methods: I...
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