نتایج جستجو برای: daily exposure
تعداد نتایج: 493200 فیلتر نتایج به سال:
The exposure of outdoor workers to solar ultraviolet radiation (UVR) has been known for some time. Measurements of erythemally weighted UVR are usually related to days of exposure and to the anatomical distribution of UVR on the human body. The aim of this research is to describe the UVR exposure of workers during a strawberry production cycle in order to assess the UVR hazard and to identify t...
Exposure to extreme heat is an important cause of morbidity and mortality throughout the world. The elevation of temperatures and increases in extended periods of high temperatures due to climate change means that heat exposure as a health concern will increase. Thus, methodologies that researchers and practitioners can use to assess heat exposure among various population groups will become inc...
Cumulative exposure to ultraviolet radiation (UVR) increases the risk of developing skin cancer, particularly squamous cell carcinoma and basal cell carcinoma. Thus, the need for protection from the sun is widely advocated, but consumers generally associate such protection with the occasional extreme exposure and tend to ignore the risk of long-term exposure. In fact, a sun exposure model predi...
PURPOSE To investigate the influence of daily oral iron supplementation on changes in hemoglobin mass (Hbmass) and iron parameters after 2-4 weeks of moderate altitude exposure. METHODS Hematological data collected from 178 athletes (98 males, 80 females) exposed to moderate altitude (1,350-3,000 m) were analysed using linear regression to determine how altitude exposure combined with oral ir...
This study investigated the association between biomarkers of fetal exposure to cigarette smoke at the end of pregnancy, cotinine in cord serum and in maternal and newborn urine samples, and quantitative measurement of smoking intake and exposure evaluated by maternal self-reported questionnaire. Study subjects were 429 mothers and their newborns from a hospital in Barcelona, Spain. A questionn...
Sun light accompany with rest and fresh air is beneficial for maintenance of health. Although scientific and laboratory witnesses have shown the relationship between light exposure and mental health, the live experience of pleasure feeling of sunlight is far more than what is accepted by experimental and observational researches. Patient with affective disorders have been treated by increasing ...
Dioxins and polychlorinated biphenyls (PCBs) are persistent environmental contaminants that bioaccumulate up the food chain (1-3). Human exposure is largely via microcontamination of animal products in the diet (4-72. Lactational transfer is a major route of exposure to the nursing infant (8,9); approximately 10-12% of total lifetime exposure can occur via nursing (10). A nursing infant may rec...
Purpose—To examine predictors of ammonia exposure and hyperammonemic crises (HAC) in patients with urea cycle disorders (UCDs). Methods—The relationships between fasting ammonia, daily ammonia exposure, and HACs were analyzed in >100 UCD patients. Results—Fasting ammonia correlated strongly with daily ammonia exposure (r=0.764, p<0.001). For patients with fasting ammonia levels <0.5 ULN, 0.5 to...
background : farmers and welders who work in open spaces and are exposed to direct sunlight are often exposed to sunlight radiation o n the neck and head . thus, they may be afflicted with various types of skin cancer . the aim of the present study was to investigate the amount of uv exposure in welders working in shahrud city , iran . materials and method s : this cross-sectional , descripti...
background: hairdressers are occupationally exposed to a number of agents in their workplace that result in respiratory symptoms and changes in pulmonary function. objective: to evaluate associations between occupational exposure and respiratory function and reported symptoms in a group of hairdressers compared to a control group. methods: a questionnaire on respiratory symptoms and workplace c...
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