نتایج جستجو برای: high level natural radiation area.
تعداد نتایج: 3765169 فیلتر نتایج به سال:
background: high level radiation areas have been recognized on various parts of the earth. mahallat hot spring region is one of these areas. study of exposure in these areas can be helpful in investigating the effects of ionizing radiation. internal and external exposure to the staff was studied. materials and methods: used materials and instruments include: rss-112 ionizing chamber for environ...
background: ramsar (mazandran province) is known for its extremely high levels of natural background radiation. although no excess cancer rate is reported in these areas by epidemiological studies, the study of tumor markers in the inhabitants of these areas may shed some light on the impact of high levels of background radiation on cancer induction. materials and methods: the level of backgrou...
Background: Ramsar (Mazandran province) is known for its extremely high levels of natural background radiation. Although no excess cancer rate is reported in these areas by epidemiological studies, the study of tumor markers in the inhabitants of these areas may shed some light on the impact of high levels of background radiation on cancer induction. Materials and Methods: The level of backgrou...
some areas of ramsar, a city in northern iran are among the world’s wellknown inhabited areas with highest levels of natural radiation. annual exposure levels in these areas are up to 260 mgy y‐1 and the mean exposure rate is about 10 mgy y‐1 for a population of about 2000 residents. if elevated levels of natural radiation as high as a few hundred msv per year is detrimental to health and leads...
applications such as high definition viedeo reproduction, portable computers, wireless, and multimedia demand, and ever-increasing need for ligh-frequency high-resolution and low-power analog-to-digital converters. flash, two-step flash, and pipeline convertors are fast but consume large amount of power and require large area. to overcome these problems, successive approximation converter blo...
Background and Objective : Natural radioactivity has been the subject of studies for many years. The mean of radiation doses of human from natural sources is about 2.5 mSv/year, but in some regions in the world this value is many times greater than the world mean. Ramsar, a city in Iran, is one of the most important high natural background areas of the world. According to UNSCEAR 2000 report,...
BACKGROUND Iran is considered as one of the countries which are located in high radiation area. Ramssar contains natural radioactive sources (Uranium-238) that can produce Radium-226 with high solubility and Radon gas with ability to fuse in dirt, soil, and water in its decay chain. Radioactive rays can produce free radicals with a short life time but high energy, which lead to changes structur...
nowadays, air pollution is a global problem that has had significant growth by technology development, population growth andindustrial development. industrial development brought natural resources deterioration, more manufacturing products, and more environmental pollutants. if pollutant won’t be controlled, human-being and wildlife will face the critical risks. significant release and critical...
although there are substantial experimental, epidemiological and clinical evidences that high doses of ionizing radiation cause cancer and other detrimental biological effects, the health effects of human exposure to chronic low dose radiation exposures are still poorly known. people in some areas around the world live in dwellings with radiation and radon levels as much as more than 200 times ...
background: humans beings are continuously exposed to ionizing radiation from natural sources. the main contributors to natural radiation are high-energy cosmic radiation and radioactive nuclides that originates in the earth’s crust. exposure to high levels of radiation can cause serious health effects. in this study an attempt has been made to monitor the levels of environmental background rad...
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