[en] The soil-composing particles in natural environment form aggregates of different stability. For soils (topsoil) of contrasting type from Chernobyl NPP area the particle size and microaggregate analyses have been performed and the distribution of Cs 137 in the obtained fractions has been studied. Results of long-term investigation of Cs 137 vertical migration in sandy soils of 50-km zone around Chernobyl NPP have been compared with data on radiocaesium distribution among water-stable aggregates and particles of various size in studied soils. On the basis of particle size analysis and aggregate soil composition the size of soil components with vertical migration potential, and the amount of Cs 137 potentially tending to migrate with the soil components along soil profile have been assessed. Based on findings showing Cs 137 partitioning among water-stable soil aggregates of diverse size and pattern of the radionuclide vertical distribution in top 0-10 cm soil layer, it was assumed that neither shift of peak radiocaesium level from upper soil layer downwards nor the so-called slow constituent of Cs 137 vertical migration (in terms of quasi diffusion description of Cs 137 profile in soil) could not be explained by self-motion of soil aggregates and particles with associated radiocaesium. Hypothesis of root intermixing as principal mechanism responsible for Cs 137 vertical transport in top 0-10 cm soil layer was postulated

[en] Over the period of 1998-2001 we studied radioadaptation of natural drosophila populations from radiocontaminated areas of Gomel Region (24 Ci/km²) in comparison with the population from Berezinsky reserve. Natural populations from radiocontaminated regions were revealed to become more resistant to the effect of factors of not only physical but chemical origin (EMS). This is indicative of unspecific adaptation nature of natural drosophila populations from radiocontaminated regions of Belarus. This adaptation was shown to remain for at least 8 generations after removing radiation influence

[en] Features of accumulation radionuclides by bodies of living cover plants woods cenosis are investigated. Researches have shown, that in elevated bodies kinds now in the greater measure strontium 90, than caesium 137 is accumulated. In root systems accumulation radionuclides is lower, than in elevated bodies. There is a specific specificity of accumulation radionuclides various bodies of plants. Accumulation radionuclides depends on weather conditions of year of supervision

[en] Epidemiological case control studies should be considered to be primary instrument for investigation of dose effect relationship between population radon exposure and risk of lung cancer. Totally twenty publications on results of case control studies conducted around the world have been found which include 12 044 cases and 20 932 controls involved to meta-analysis. The volume of case and control groups allows significant conclusions on increasing linear dose-response relationships in the range of radon concentration above 75 Bq/m3 with slope factor 0.0012 m3/Bq (95% CI 0.007-0.0017 m3/Bq). Consideration of lower exposure range (bellow 75 Bq/m3) gives some evidence for U-shaped relationship

[en] The paper reports potential forestry objects to be rehabilitated. Measures which are being offered to decrease radioactivity levels in timber and forest-derived foodstuffs are analyzed. The authors arrive at the conclusion that in the foreseeable future the only means to decrease radioactivity in forest ecosystems will be self-decontamination through the decay of radioactive isotopes

[en] There are presented some actual directions of radon mapping in order to stimulate this procedure in Belarus. The first steps should be both providing the detail investigation of potential radon dangerous regions and adopting of existing devices for measurements of radon in ground water and soil

[en] The maintenance of nuclides of different mammal species in the zone of radioactive contamination was estimated. Transferring and dynamics of Cs 137 in parts of a trophic chain, soil - plants - animal, were studied

[en] The main results of the long-term radioecological monitoring of the some water ecosystems of the contaminated districts of Belarus are presented. The main components of water ecosystem (water, suspensions, bottom sediments, water vegetation) were observed. The migration of Cs 137 and Sr 90 on the water-collection areas were investigated in detail. The tendency of Sr 90 increasing in the components of the surface water systems is observed

[en] The radio-immune method was used for investigating the level of the cAMP in the thymocytes of rats on the 30th day after an acute and chronic γ-exposure to dose of 1,0 Gy. It was discovered that chronic γ-exposure to dose 1,0 Gy caused the change in the level of the intracellular cAMP. We can proposal that the influence of γ-irradiation probably may initiate the modification of the system of the cyclic nucleotides

[en] It was shown, that preliminary injection of medication made from overground part of knotweed (Polygonum) decrease radiation effect on the cardiovascular system of acute irradiated animals