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GENOTOXICAL EFFECTS IN BUCCAL EPITHELIA AT MINERS, WORKING IN THE CONDITIONS OF IRRADIATION BY NATURAL SOURCES OF IONIZING RADIATION 2011 D.A. Petrashova1, N.K. Belisheva1, I.I. Pelevina2, N.A. Melnik3, F.ZolzerKola Scientific Center RAS, Apatity Institute of Chemical Physics named after N.N. Semyonov RAS, Moscow Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials named after I.V. Tananaev of Kola Scientific Center RAS, Apatity University of Southern Bohemia, Czech Republic Results of research the cytogenetic infringements in cells of buccal epithelium at miners who are exposed to chronic exposure by natural ionizing radiation sources are presented. It is established that genotoxical effects in buccal epithelia at miners in essential decrease in frequency of occurrence the cells without visible infringements, increase of number of cells with necrotic changes and in increase in 26 times the number of two-nuclear cells in comparison with control group are shown.

Key words: miners, ionizing radiation, buccal epithelium, cytogenetic infringements Dina Petrashova, Candidate of Biology, Research Fellow at the Department of Medical- biological Problems of Human Adaptation in Arctic. -mail: petrashova@admksc.apatity.ru Nataliya Belisheva, Doctor of Biology, Chief of the Department of Medical-biological Problems Of Human Adaptation in Arctic. -mail: natalybelisheva@mail.ru Irina Pelevina, Doctor of Biology, Professor, Main Research Fellow. -mail: pele@chph.ras.ru Nataliya Melnik, Candidate of Technical Sciences, Associate Professor, Chief of the Accredited Regional Laboratory of Radiating Control. E-mail: melnik@chemy.kolasc.net.ru Zolder Frido, Doctor of Biology, Chief of the Radiobiology and Toxicology Department at the Faculty of Health and Social Researches. E-mail: zoelzer@zsf.jcu.cz

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