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    Wyświetlanie 1-5 z 5
    Tytuł:
    Estimate of radon exposure in geothermal SPAs in Poland
    Autorzy:
    Walczak, Katarzyna
    Olszewski, Jerzy
    Zmyślony, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2177082.pdf
    Data publikacji:
    2015-09-21
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    Polska
    occupational exposure
    worker
    radon
    ionizing radiation
    spa visitor
    Opis:
    Objectives Geothermal waters may contain soluble, radioactive radon gas. Spa facilities that use geothermal water may be a source of an increased radiation dose to people who stay there. It has been necessary to assess the exposure to radon among people: workers and visitors of spa centers that use geothermal waters. Material and Methods In 2013, workers of the Nofer Institute of Occupational Medicine measured concentrations of radon over the geothermal water surfaces in 9 selected Polish spa centers which use geothermal water for recreational and medicinal purposes. The measurements were performed by active dosimetry using Lucas scintillation cells. Results According to our research, the doses received by the personnel in Polish geothermal spas are < 0.6 mSv/year. In 1 of the investigated spas, the estimated annual dose to the staff may exceed 3 mSv/year. Conclusions In Polish geothermal spas, neither the workers nor the visitors are at risk of receiving doses that exceed the safe limits.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2016, 29, 1; 161-166
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possible role of radon in prebiotic chemistry and in early evolution of Life on Earth
    Autorzy:
    Zagórski, Z. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/148902.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    great oxidation event
    ionizing radiation
    prebiotic chemistry
    radon
    thoron
    uranium
    Opis:
    Radon in the environment of early Earth was present in sites, determined by location of deposits of uranium, in very different geological formations. According to the decay of uranium-238, the total production of radon at the beginnings was twice as high as now and was continuously diminishing to the present levels. This nuclide could not play as big a role as do radioactive elements connected with the presence of high concentration of 235U, which was high enough in some places to give rise to formation of natural nuclear fission reactors (e.g. Oklo phenomenon in Africa). The main role of ionizing radiation in prebiotic chemistry and biological evolution was played by low LET (linear energy transfer) radiations, as deep penetrating sources of external energy. High LET radiations are of low penetration and could act only superficially. Radon is an exception, due to its easy transfer in the air. Therefore, it could play a role already in the cases of these early organisms which exhibited the gaseous exchange of chemical compounds with the surrounding atmosphere. The action was destructive, but, on the other hand, was also mutagenic. Nevertheless, the general quantitative effect of radon on the global scale could not be larger than of other radioactive nuclides. Presented considerations are part of the chapter by the present author on the role of nuclear and radiation chemistry in astrobiology, in the monograph published by American Scientific Publishers [1].
    Źródło:
    Nukleonika; 2010, 55, 4; 555-558
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamics of radon and its decay products inside an accumulative chamber
    Autorzy:
    Yakovleva, V. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/148846.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radon
    thoron
    accumulative chamber
    ionizing radiation yield
    ion production rate
    Opis:
    The calculations of radon and its decay products accumulation dynamics inside a chamber designed for measurements of radon flux density from the soil surface were carried out in the present work. Dynamics of alpha-,beta-particles and gamma-ray yields under decay of accumulated radionuclide nuclei was calculated based on the accumulated activity. Ion production rate inside the accumulative chamber due to ionizing radiation of different types was estimated. Thoron and its decay products accumulation regularities inside the accumulative chamber were also estimated and potential effect of thoron on measurement results (if counting regime is used) was analyzed in detail. Dynamic equations of the studied radiation characteristics, their solutions and obtained results analysis are presented.
    Źródło:
    Nukleonika; 2010, 55, 4; 595-600
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Authors’ response (December 8, 2017) to the letter to the Editor concerning the paper “Occupational exposure to radon for underground tourist routes in Poland: Doses to lung and the risk of developing lung cancer”
    Autorzy:
    Walczak, Katarzyna
    Olszewski, Jerzy
    Politański, Piotr
    Zmyślony, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2162023.pdf
    Data publikacji:
    2018-10-24
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    radon
    cancer risk
    LNT model
    hormesis
    radiation risk model
    low dose ionizing radiation
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2018, 31, 5; 707-709
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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