Radon Concentration in Water on the Several Regions of Georgia

Quantitative assessment of radon distribution in Georgia has been carried out. According to field data, assessment background value of Radon in water from the surface, shallow and deep layer

Indoor Radon Concentrations in Selected Buildings of Georgia

Within the project “Radon mapping and radon risk assessment in Georgia”, funded by the Shota Rustaveli National Science Foundation of Georgia in 2019‒2022 (SRNSFG FN-19-22022), systematic radon (222Rn, Rn) surveys in indoor air, soil gas, and waters were carried out in Georgia. The indoor radon study included 702 locations in 11 administrative regions of Georgia. Altogether, 1338 rooms in 107 schools, 540 kindergartens, 6 city halls, and 57 homes were examined for radon all year round by exposing solid-state nuclear track detectors RSFV from Radosys Ltd. Rn concentrations ranged from 2 to 1226 Bq m3, with an annual arithmetic mean value of 84 Bq m3 for all the regions. The annual effective doses ranged from 0.2 to 3.8 mSv with an arithmetic mean value of 1.2 mSv a1

Thermal Analysis of Whole Bacterial Cells Exposed to Potassium Permanganate Using Differential Scanning Calorimetry: a Biphasic Dose-Dependent Response to Stress

Differential scanning calorimetry (DSC) was applied to estimate the impact of the toxic oxidant potassium permanganate (PM) on the intracellular structural and functional alterations at whole cell level using soil bacteria Arthrobacter oxydans as a model culture. Differential scanning calorimetry (DSC) was applied in order to estimate the impact of the toxic oxidant potassium permanganate (PM) on the intracellular structural and functional alterations at the whole cell level using the soil bacteria Arthrobacter oxydans as a model culture. We compared the total melting heat and the temperature of DNA-protein complex (DNP) melting at the PM application prior to the calorimetry measurement and after 24-h exposure at the concentration range 0.02–1.4 mM. The initial oxidative effect caused changes in the pattern of the whole cell melting spectra (mainly at the temperature range 56–78°C), the decrease of Tmax °C DNP melting, and did not influence significantly the total heat of bacterial melting at different concentrations of PM. The prolonged effect of permanganate up to 24 h was characterized by a biphasic dose-dependent response to stress estimated by the DSC technique and the colony-forming assay. The low doses of PM (0.02 and 0.2 mM) stimulated cell proliferation, and increased the total whole cell melting heat and the temperature of DNP melting. The toxic effect of PM up to 0.04 mM reduced cell viability, changed the character of multipeaked thermograms, and lowered the total melting heat and the temperature of DNP melting in a concentration-dependent manner. This study presents the DSC method for evaluating and monitoring the effects of exposure to potential human and environmental toxicants