نتایج جستجو برای: high natural background radiation areas hnbras

تعداد نتایج: 3505119  

Journal: :Scientific reports 2016
Mario Xavier Ruiz-González Gábor Árpád Czirják Pierre Genevaux Anders Pape Møller Timothy Alexander Mousseau Philipp Heeb

Ionizing radiation has been shown to produce negative effects on organisms, although little is known about its ecological and evolutionary effects. As a study model, we isolated bacteria associated with feathers from barn swallows Hirundo rustica from three study areas around Chernobyl differing in background ionizing radiation levels and one control study site in Denmark. Each bacterial commun...

Journal: :Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2021

Journal: :International Journal of Radiation Biology 2021

Purpose The projected existence and magnitude of carcinogenic effects ionizing radiation at low doses low-dose rates is perhaps the most important issue in protection today. Studies childhood cancer natural background have potential to throw direct light on this question, into a dose range below few tens mSv. This paper describes studies that been undertaken their context, discusses some proble...

Journal: :iranian journal of radiation research 0
t.v. ramachandran 19-a/201, verain regency estate, kalyan _ shill road, dombivli (e) 421 202, maharashtra, india

ever since studies on uranium miners established the presence of a positive risk coefficient for the occurrence of lung cancer in miners exposed to elevated levels of 222rn and its progeny, there was a great upsurge of interest in the measurement of 222rn in the environment and considerable data is generated on the levels of 222rn in the environment across the worlds and is periodically reporte...

Journal: :iranian journal of radiation research 0
t.v. ramachandran 19-a/201, verain, regency estate, kalyan – shill road near s.v. jondhele eng. college, dombivli(e) 421 202, thana dist, maharashtra, india

all living organisms are exposed to ionizing radiation comprising cosmic rays coming from outer space, terrestrial nuclides occurring in the earth’s crust, building materials, air, water and foods and in the human body itself. the exposures are constant and uniform for all individuals everywhere including the dose from ingestion of 40k in food. cosmic rays are, more intense at higher altitudes,...

K.D. Oyeyemi, M. Malik, Mojisola Usikalu, O.O. Adewoyin, P.P. Maleka,

Background: Natural radionuclides are always present in the environment. Human exposure to the background radiation is inevitable. It is therefore important to assess health risk associated with these radionuclides. Materials and Methods: The distribution of natural radionuclides 238U, 232Th and 40K in soil samples collected from all the twenty (20) local Governments headquarter areas in Ogun s...

2012
Sadegh Hazrati Abbas Naghizadeh Baghi Hadi Sadeghi Manouchehr Barak Sahar Zivari Soheila Rahimzadeh

Gamma rays pose enough energy to induce chemical changes that may be biologically important for the normal functioning of body cells. The external exposure of human beings to natural environmental gamma radiation normally exceeds that from all man-made sources combined. In this research natural background gamma dose rates and corresponding annual effective doses were determined for selected cit...

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