[en] The conference included the following sections: (i) Biology (336 contributions); (ii) Chemistry (56 contributions); (iii) Didactics (6 contributions); (iv) Environmental Science (30 contributions); (v) Geography (38 contributions); (vi) Geology (50 contributions); Contributions relevant of INIS interest have been inputted to INIS.

[en] The adsorption behavior of cesium on bentonite from Slovak deposits - Jelsovy potok, Kopernica, Lieskovec was investigated and the results compared with those for adsorption onto montmorillonite K10. The adsorption of cesium on bentonite and montmorillonite was studied by using batch - type procedure and radiotracer technique. The cesium adsorption in the presence of oxalic acid was performed between 1 · 10^-4 mol L^-1 to 5 · 10^-2 Cs⁺ mol L^-1 and distribution coefficients were determined for bentonite - cesium solution system as a function of sorbate concentration cations and natural ligands concentrations. Oxalic acid very significantly affects the adsorption of cesium. (authors)

[en] In the present work we combined two experimental techniques: femtosecond laser spectroscopy and secondary ion mass spectrometry-(SIMS, secondary ion mass spectrometry). SIMS is a highly selective analytical method that allows examination of the chemical composition of surfaces. Its only drawback is the matrix effect that affects the measurement of quantitative representation of each component in the sample. Our goal was to influence the matrix effect with femtosecond laser pulse. (authors)

[en] One of the basic prerequisites for the use of Slovak bentonite with a deep final storage of radioactive waste and spent nuclear fuel is their stability against exposure to ionizing radiation, which comes from radionuclides present in irradiated fuel cells and waste. The contribution is focused on comparison of adsorption properties of bentonite from Slovak bearing Jelsovy potok, before and after irradiation with ⁶⁰Co gamma-source with an absorbed dose of gamma-radiation 1 MGy. Changes of adsorption properties were studied by the method of radioisotope indication, using radioisotope strontium-85. Changes in the structure were studied by the method of electron spin resonance. (authors)

[en] The paper is focused on optimizing the working conditions of measurement detection kit with single crystals NaI (Tl) scintillator for the detection of short-lived radio-isomer ^99mTc. Scintillation detectors are still the most widely used detectors of radiation thanks to their versatility. Single crystal of sodium iodide has the best energy efficiency (8-10%), and thallium in an amount of 0,1 - 0,5% has the function of activator. The duration of the flash is about 0.25 · 10^-6 s. The high atomic number of iodine allows determine the energy distribution of gamma-rays in the range 50 keV - 5 MeV. The goal was to ensure symmetrical placement of registered maximum in the energy window of the analyzer, so that small changes in gain and discriminatory levels did not affect the number of pulses registered. Optimum working conditions of scintillation detector were characterized by operating voltage and discriminatory level. (authors)

[en] Nuclear energy is one of the most debated and controversial forms of electricity generation. Stagnation phase of the turn of the millennium is relieved by the construction boom especially in Asian countries, and nuclear power is again referred to as prospective energy source. However, it is questionable how this 'renaissance' of a fall on his share in the global energy mix. Despite the optimistic forecasts of international institutions (IAEA, IEA), our analysis shows that by 2030, nuclear power can increasingly replace the conventional fuels. Although we see enormous growth of new nuclear reactors, it is unlikely that this form of electricity generation has increased in importance over the future of its current value. On the other hand, we can rightly say that nuclear energy is a viable industry and significantly contributes to improving energy security. (authors)

[en] The course of cancer as well as possible responses to drug application is accompanied by chemical changes on the surface of a biological membrane. These bio-chemical manifestations are observed by the method of secondary ion mass spectrometry (SIMS). There was analyzed mouse leukemic sub-line of cells L1210 and its biochemical manifestations, which corresponded to the two sets of samples, sensitive leukemic cells (S cells) and to the cells gradually adapted to the drug vincristine (R cells). SIMS analysis confirmed that cancer was accompanied by biochemical signs on the surface, which can be diagnosed. Specifically, the molecular ions and fragments of selected chemical tracers: sialic acid, cholesterol, phosphatidylcholine and its derivatives were observed. At the analysis of S cells were observed higher intensities of the secondary ion signals of selected indicators compared with R cells. Moreover, for these samples were also detected large complexes of phosphatidylcholine with organic high mass acids, which were not confirmed in treated cells. (authors)

[en] Ionic liquids are a growing group of so-called green compounds, changing its physicochemical properties depending on the nature of the contained cation, or anion in the molecule. The paper is focused on the synthesis of phosphonium TSILs: tributyloctylphosphoniumbis(trifluoromethyl)sulfonyl imide [tBuOcP]⁺[NTf₂]^-, conceived as a solvent as well as extractant for liquid extraction of radionuclides. This ionic liquid will be tested in further experiments as an extractant for the short-lived radio-isomer Tc-99m. (authors)

[en] Minerals of crichtonite groups were identified from mylonitized Hercynian metagranites forming Ostry Rohac in the Western Tatras. Members of the crichtonite group represent complex oxides with the general formula XIIAVIBVIC18 IVT2O38, where the main cations are: A = Sr, Pb, Ca, Na, K, REE, B, U B = Mn, Y, REE, U, Zr, C = Ti, Fe³⁺, Cr, and T = Fe³⁺, Mg. Of the studied rocks were described Crichton, Dessau-(Y), a phase corresponding to crichtonite in composition, but with a dominant content of Fe²⁺ in position B ('Fe-Crichton') and phase with similar characteristics to loveringite, but with a dominant content of Mn 'Mnloveringite). The formation of a group of crichtonite minerals shows a unique monazite breakdown product in environment rich in Ti. (authors)

[en] Using the Slovak bentonite barriers in the repository is predestined by their mineralogical, erosion and rheological properties as well as by the favorable adsorption and retardation behavior to the ionic forms of radionuclides. Usability in practice depends on the speed of the adsorption of adsorbate on the surface of the adsorbent. The aim of this work was to study the effect of mixing time of bentonite and model sample on the distribution ratios and percentage of strontium adsorption. Adsorption of radionuclides Sr-85 on bentonite J250 is relatively fast. Equilibrium is reached almost immediately, up to 1 to 1.5 minutes from the start of contact of solid and liquid phases. (authors)