نتایج جستجو برای: exposure limit
تعداد نتایج: 491019 فیلتر نتایج به سال:
Background and aims: Melamine is a chemical widely used in the industries .It was used in the production of plastic – coated plates, glue, molding compounds and melamine dinnerware. Formaldehyde as an irritant was produced in the melamine dinnerware production and create some health problem. In this study irritant risk assessment of formaldehyde was assessed in Melamine dinnerware industr...
Purpose: The aim of this study is to evaluate the effects of formaldehyde vapor on eyes, nose and skin and pulmonary function of medical students, as well as, indoor concentration of formaldehyde (FA) vapor in dissection laboratory. Materials and Methods: One hundred sixty five (165) medical students were selected randomly. Students were excluded if they had had history of smoking, or any condi...
Introduction: Repetitive movements and overexertion during occupational activities can lead to musculoskeletal disorders in the upper limbs. The aim of this study was to assess the ergonomic risk factors of the upper limb extremities using modified strain index (RSI) and threshold limit value for hand activity level (TLV-HAL) methods in hand-swen shoe workers in Tabriz city. Methods: The ergon...
Introduction: Petrochemical industries are known as one of the most important sources of organic pollutants. In this study, the relationship between inhaled benzene, toluene, ethylbenzene and xylene (BTEX) concentration with some urine metabolites was investigated in a petrochemical complex Methods: This cross-sectional study was an analytical type with 60 inhalation air samples and biological...
Lowness of the registered doses by the personal dosimeters (film badge in Iran) for most of dental radiology practitioners has made some of them doubtful about the rightness of the employed dosimetry method. On the other hand, some relatively considerable occupational exposures in dental radiology have been reported. These two opposite facts propose a comprehensive statistical and analytical re...
Benzene, a common industrial chemical and a component of gasoline, is radiomimetic and exposure may lead progressively to aplastic anaemia, leukaemia, and multiple myeloma. Although benzene has been shown to cause many types of genetic damage, it has consistently been classified as a non-mutagen in the Ames test, possibly because of the inadequacy of the S9 microsomal activation system. The met...
The purpose of this narrative review is to describe effective efforts in radiation protection limit scattered exposure terms room analysis and find out the difference effect retaining wall thickness limiting scatter dose.
Introduction In radiography, dose and image quality are dependent on radiographic parameters. The problem is caused from incorrect use of radiography equipment and from the radiation exposure to patients much more than required. Therefore, the aim of this study was to implement a quality-control program to detect changes in exposure parameters, which may affect diagnosis or patient radiation do...
Background & Objectives : Exposure to heat is a significant problem in the Industries. The present study aimed at the evaluation of thermal risk, measurement of heat stress index, and proposing a plan for heat control in cutting and welding units in profile factory . Methods : The data of study was analyzed through the measurement of physical parameters with digital WBGT device...
Background & Aim: Radiation is an essential modality in the management of cancer therapy but its acute and chronic side effects on the normal organs limit the helpfulness of the radiotherapy. The aim of current study was to investigate the effect of dose dependent whole body radiation exposure on amount of 8-OHdG and total antioxidant capacity in the male Wistar rat's plasma. It was also planne...
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