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Distribution of indoor radon concentrations between selected Hungarian thermal baths

Abstract

Owing to the high potential of radon to increase the risk of lung cancer, health organizations are enforced to update their regulations and recommendations regarding indoor radon levels each year. In this study, the indoor radon concentrations of three randomly selected thermal baths in Hungary using CR-39 and an AlphaGUARD radon monitor were measured with regard to the new updated standards of the European Basic Safety Standard (EU BSS, Council Directive 2013/59/Euratom, 2014). The annual average of indoor radon concentrations in Parad Medical Bath, Igal Health Spa and Eger Turkish Bath were measured as 159 ± 19, 176 ± 27 and 301 ± 30 Bq/m3, respectively. Indoor radon concentration in all measurement locations were determined to be below the reference level, with the exception of the main pool, small pool and sparkling bath areas in the Eger Turkish Bath that were measured as 403 ± 42, 315 ± 32 and 354 ± 36 Bq/m3, respectively. In light of the results, the estimated annual average radon concentration in the thermal baths was below the EU BSS reference level of 300 Bq/m3. Personal dosimetry is required to estimate the annual effective dose from inhaled radon by the workers at the Eger Turkish Bath. This procedure is required in order to justify the application of the mitigation process of decreasing working hours, improving the ventilation rate or increasing the number of classified employees in response to the official radiation surveillance programme.

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Thermal Fluctuations in Electric Circuits and the Brownian Motion

Thermal Fluctuations in Electric Circuits and the Brownian Motion

In this work we explore the mathematical correspondence between the Langevin equation that describes the motion of a Brownian particle (BP) and the equations for the time evolution of the charge in electric circuits, which are in contact with the thermal bath. The mean quadrate of the fluctuating electric charge in simple circuits and the mean square displacement of the optically trapped BP are governed by the same equations. We solve these equations using an efficient approach that allows us converting the stochastic equations to ordinary differential equations. From the obtained solutions the autocorrelation function of the current and the spectral density of the current fluctuations are found. As distinct from previous works, the inertial and memory effects are taken into account.

Open access
Austria-wide survey on resistant, potentially pathogenic bacteria at Austrian bathing sites, 2017

was described in Austria ( Hartl et al., 2019 ). This isolate was obtained from a 59-year-old patient suffering from acute otitis externa after visiting a thermal bath, which indicates water as the source of infection with antibioticresistant bacteria ( Hartl et al., 2019 ). Also the finding of an ESBL-producing E. coli mirrors the situation in clinical microbiology. According to the “Der Österreichische Resistenzbericht” (AURES) report 2017, 49.5% of invasive E. coli isolates were resistant to aminopenicillins, 20.5% resistant to fluoroquinolones, 9.6% to third

Open access
Investigation of Murine T-Cells and Cancer Cells under Thermal Stressors and 2D Slow Rotating System Effects as a Testbed for Suborbital Flights

activation, cells were transferred into 15 mL conical tubes to undergo centrifugation for 5 min. The next step was to place the cells in various 2 mL Eppendorf tubes and put them in a thermal bath at various temperatures. Cells were extracted from each of the thermal baths to assess the survivability. Thermal and Centrifugation Study Using Murine T-cells and Lung Cancer Cells Our results show ( Figure 2 ) the survival rate of murine T-cells under different thermal stressors: at 37℃ (reference temperature), 30℃, 34℃, and 40℃ for the first batch of cells (with no

Open access