نتایج جستجو برای: exposure density
تعداد نتایج: 709271 فیلتر نتایج به سال:
Objective: There is evidence that gestational exposure to lipopolysaccharide (LPS) results in fetal zinc deficiency, and eventually neurodevelopmental abnormalities. In this study, we utilized a rat model of maternal immune activation (MIA) to investigate the possible neuroprotective effect of zinc supplementation throughout pregnancy on hippocampal astrocytes activation as well as inflammatory...
Abstract Background: Follicles are part of epidermis and pass through a cell cycle. The result of this cell division is producing hair. Follicles specially growing follicles are very sensitive against irradiation and are damaged by low dose rates. So in this study investigated the relationship between chronic exposure of radiation workers and their hair loss. Materials and methods: In this stud...
Background: Jaw bone quality plays an essential role in treatment planning and prognosis of dental implants. Regarding several available methods for bone density measurements, they are not routinely used before implant surgery due to hard accessibility.Objective: An in vitro investigation of correlation between average gray scale in direct digital radiographs and Hounsfield units in CT-Scan pro...
Introduction: Few pieces of evidence are available about the association between occupational exposure to vegetable oil and the risk of blood lipid problems. This study was aimed to investigate the relationship between exposure to vegetable oil and blood lipid profile in a vegetable oil factory. Materials and Methods: This retrospective cohort study was carried out on 30 male workers exposed t...
In the millimeter-wave bands towards 5G, human exposure to radio frequency (RF) electromagnetic field (EMF) is evaluated in terms of free space power density, rather than specific absorption rate. Maximum power density emitted by 5G user equipment should not exceed the power density limits set by relevant regulatory guidelines. In this paper, we provide upper bounds of maximum power density of ...
Fast growth of the number of mobile phone subscribers in Iran, over the last few years, is the reason for construction of more and more base stations (BTS) especially in residential areas. As the BTS antennas emit radiofrequency (RF) electromagnetic energy, so it is the main concern of general public about their health and safety. The aim of this research work is to assess public exposure...
Crash rates per mile indicate a high risk of vehicle crash in older drivers. A reliance on mileage alone may underestimate the risk exposure of older drivers because they tend to avoid highways and travel more on nonfreeways (e.g., urban roads), which present greater hazards. We introduce risk-exposure density as an index of exposure that incorporates mileage, frequency of travel, and travel du...
Increased skeletal muscle capillary density would be a logical adaptive mechanism to chronic hypoxic exposure. However, animal studies have yielded conflicting results, and human studies are sparse. Neoformation of capillaries is dependent on endothelial growth factors such as vascular endothelial growth factor (VEGF), a known target gene for hypoxia inducible factor 1 (HIF-1). We hypothesised ...
BACKGROUND Traffic exposure is a major contributor to ambient air pollution for people living close to busy roads. The relationship between traffic exposure and lung function remains inconclusive in adults. METHODS A cross-sectional study was conducted to investigate the association between traffic exposure and lung function in the Atherosclerosis Risk in Communities (ARIC) study, a community...
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