نتایج جستجو برای: exposure time
تعداد نتایج: 2143328 فیلتر نتایج به سال:
abstract background: the radiographic image accuracy depends on the x-ray film information visibility. good visibility is found by good contrast. radiation exposure parameters (kvp, mas) and film processing conditions have impact on contrast. in dentistry radiography machines, exposure time and processing procedure are set by radiographer. no optimized exposure time and processing conditions ma...
Introduction: In many workplaces there is exposure to heat and light simultaneously. This study investigated the combined effect of heat and lighting on some cognitive performance, i.e. reaction time. Methodology: the present semi-experimental study was conducted 2015 on 33 healthy students (16 girls and 17 boys) with a mean age of 22.1 in the thermal stress chamber. The reaction time parame...
Introduction Quality control (QC) techniques are used in monitoring and maintenance of the components of an x-ray system. QC of radiology devices plays a significant role in reduction of medication dose and optimization of image quality. This study aimed to conduct QC tests on randomly selected radiology devices, installed in diagnostic imaging departments of Iran. Materials and Methods In tota...
The experiment was conducted in factorial test based on a completely randomized design with three replications in greenhouse of Isfahan University of Technology of Iran. Lettuce seedlings were exposed separately to the exhaust emissions in three different exposure times (10, 20 and 30 days) and after the exposure time, their morphological, physiological and anatomical traits were measured and c...
Background: Increase in mobile phone users cause extensive consideration of researchers to biological effects of mobile phone waves. As the mobile set, is held near the ear and temporal lobe, and whereas distance of antenna from the inner ear is few centimeters, this study is the first research in our country to assess potential changes in auditory brain stem response of rabbit after exposure...
Introduction: Occupational Dermal exposure to Antineoplastic Drugs is the one of the most important routes in Healthcare staffs. Several antineoplastic drugs have been classified as carcinogens by the International Agency for Research on Cancer (IARC). Regards to this issue investigation on Dermal exposure to Antineplastic Drugs in healthcare staffs is nessessary. Method: In this Descriptive a...
effects of ambient copper was investigated on serum stress markers, sodium and enzyme levels in common carp ( cyprinus carpio l.) over a 14-d exposure period. fish were exposed to 0, 25 and 100 μg l -1 copper (as copper sulfate) and blood was sampled at 0, 3, 7 and 14 d after exposure. serum profile was significantly affected by copper concentration, sampling time and their interaction. increas...
to determine the degree of susceptibility of an. sacharovi to malathion 5%, fenitrothion 1% and ddt 4% extended studies were carried out on sucked blood engorged mosquitoes collected from dasht argen (fars province) in 1997. testing method was according to standard who method in lots of 25 adults' mosquitoes in 4 replicates. an. sacharovi were touched by malathion 5% and ddt 4% insecticides in ...
Background: Diazinon (Dzn), an Organophosphorus (OP) pesticide, is extensively used in agriculture. Acetylcholinesterase inhibition is linked to OP toxicity, and there are major mental health concerns associated with the use of pesticides. The objective of this study was to assess the depressive behavior in an animal model following their exposure to Dzn and the effect on the Brain-Derived Neur...
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