[Radiation and nonradiation factors in thyroid pathology development for Chernobyl cleanup workers--residents of Mayak PA affected zone].

Thyroid state study was been carried out for Chernobyl NPP accident liquidators living in Ozyorsk, the city, located in the nuclear facility affected zone (Mayak PA). In total 531 individuals were examined. Thyroid assessment was made basing on physical examination, on ultrasound study and on hormones measurement of thyroid stimulating hormone, free thyroxine and thyroid peroxidase antibody.

Thyroid abnormalities associated with protracted childhood exposure to 131I from atmospheric emissions from the Mayak weapons facility in Russia.

Between 1948 and 1960, the Mayak nuclear weapons facility in Ozyorsk, Russia discharged relatively high levels of radionuclides, primarily (131)I, into the atmosphere, resulting in appreciable exposure to the residents of Ozyorsk. To evaluate the association between thyroid diseases and childhood exposure to radioiodines, we screened 894 Ozyorsk residents born between 1952 and 1953. The study population was comprised of 581 exposed individuals living in Ozyorsk during the years of heaviest exposure and 313 nonexposed individuals who moved to Ozyorsk when radiation exposure from Mayak largely had ended.

[Cyclic nucleotides in rat tissues under long-term irradiation].

Considerable changes in concentrations of cAMP and cGMP and in the CAMPOcGMP ratio were found in the thymus and blood plasma of rats subjected to long-term irradiation at cumulative doses of 10 to 20 Gy. This might be a manifestation of adaptation reactions that develop in response to the effect of ionizing radiation.

[Damage to the structure of DNA and to the metabolism of nucleic acids in the thymus in relation to the dose of tritium oxide].

Single administration of tritium oxide (1.1-44 MBq per 1 kg of body mass) causes a dose-dependent decrease in the level of rat thymus nucleic acids within the range of concentrations of injected tritium 5.5-44 MBq/g.

[Comparison of the biological effects of tritium oxide and gamma radiation based on changes in the mass of the rat thymus gland].

RBE of tritium oxide (cumulative doses from 0.33 to 14.7 Gy), in comparison with gamma-radiation, amounted to 2-3 as estimated by the thymus mass.