نتایج جستجو برای: natural background radiation

تعداد نتایج: 1502475  

Journal: :مجله دانشگاه علوم پزشکی مازندران 0
محمدتقی صمدی mohamad taghi samadi بهمن گلزار خجسته bahman golzarkhojasteh نیما رستم پور nima rostampour

abstract background and purpose: people are always exposed to ionizing radiation, which could badly influence their health. the degree of these influences depends on the level of radiations. in this study the dose of indoor gamma radiation was assessed using rds-110 multi-purpose survey meter. materials and methods: to determine the dose rate of indoor radiations in cities of hamedan province f...

Journal: :iranian journal of radiation research 0
s.m.j. mortazavi department of medical physics and medical engineering and the center for research in radiation sciences (crrs), shiraz university of medical sciences, shiraz, iran h. mozdarani department of medical genetics , school of medical sciences, tarbiat modares university, tehran, iran

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...

Journal: :iranian journal of radiation research 0
s.m.j. mortazavi department of medical physics and medical engineering, school of medicine, and the center for research in radiation sciences (crrs), shiraz university of medical sciences, shiraz, iran h. mozdarani department of medical genetics, faculty of medical sciences, tarbiat modares university, tehran, iran

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 ...

Journal: :iranian journal of radiation research 0
m.b. tavakoli department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran g.h fallah mohammadi department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran z. fallah mohammadi department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran z. shaneh department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم انسانی 1393

this studyinvestigated therelations between examinees’ academic knowledge and theirperformanceonreading section of ielts and toefl (ibt) through using generalizabilitytheory. g-theory was utilized to investigate the effects of subtest, test items, participants and academic background on the reliability of ielts and toefl (ibt) score. tosamplethe subjectsofthissurvey,a placement testwasadministe...

Journal: :iranian journal of radiation research 0
s.m.j. mortazavi department of medical physics and medical engineering, shiraz university of medical sciences, shiraz, iran a. niroomand-rad georgetown university, washington dc 20007, usa h. mozdarani department of medical genetics, faculty of medicine, tarbiat modares university, tehran, iran p. roshan-shomal the center for research in radiation sciences (crrs), shiraz university of medical sciences, shiraz, iran s.m.t. razavi-toosi department of physiology, school of medicine, tehran university of medical sciences, tehran, iran h. zarghani department of medical physics, school of medicine, mashhad university of medical sciences, mashhad, iran

background: in some areas of ramsar, a city in northern iran, residents receive a much higher annual radiation exposure than is permitted for radiation workers. induction of adaptive response in residents of ramsar has been reported previously. in this study induction of such a response in short term exposure to high background levels of gamma radiation is investigated. materials and methods: f...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1380

در دنیا مناطقی وجود دارند که ساکنین آنها در معرض پرتوهای طبیعی زمینه بالا هستند. این مناطق به ‏‎high background radiation areas hbras‎‏ ، معروف می باشند. از جمله این مناطق می توان به گوارا پاری در برزیل ، کرالا در هند ، نواحی از آمریکا و یانگ جیانگ در چین اشاره کرد. در ایران نیز مناطق با پرتودهی زمینه بالا مشاهده شده است . رامسر یکی از این مناطق است .

Journal: :Security and Defence Quarterly 2017

Journal: :Journal of Radiation Research 1991

Journal: :Advanced Biomedical Research 2013

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