[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.

[Genome of somatic cells of animals during prolonged radiation exposure].

The genome of the thymus and bone marrow of the Wistar rat brain was investigated during daily repeated irradiation at a dose of 0.5 Gy in total doses of 0.5-20 Gy.

[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.

[Evaluation of the expression of damage of the DNA-structural complex of rat thymocytes based on kinetics of alkaline lysis following irradiation].

Rotary viscosimeters were used to study the postirradiation destruction of the DNA-structural complex (DSC) of rat thymocyte nuclei exhibited by a change in alkaline denaturation of DSC upon lysis. The S area, limited by the characteristic viscosity values obtained during alkaline lysis of thymocyte nuclei, was used as a characteristic of DSC. Immediately after irradiation the S area changed up to 81-84 per cent at 0.