Authors:M. Vladár, D. Nikodemová, I. Gomola, M. Vičanová, and M. Fojtík
Conclusions from monitoring of two main natural sources of human exposure in Slovak Republic are presented: the outdoor photon dose equivalent rateHx and indoor radon volume activity. Dose equivalent rates were determinated by on-line monitoring network IRIS, and off-line territorial TLD network as well. Radon volume activity was determinated by solid state track detectors CR-39. The annual effective dose from external exposure, determinated by IRIS network, is equal to 816 mSv · y–1. Lower value, 618 mSv · y–1 had been found from TLD network data. The effective dose caused by inhalation of radon and its progeny lays within the range 1.7 to 5.0 mSv · y–1. Such broad range is caused mainly by uncertainties in calculation procedures of radon effective doses.
Sorption of Sr on five Slovak bentonites of deposits has been studied with the use of batch technique. In the experiments
there have been used natural, chemically modified and irradiated samples, in three different kinds of grain size. The pH influence
on sorption of strontium on bentonites, pH change after sorption and influence of competitive ions have been studied. Distribution
ratios have been determined for bentonite–strontium solution system as a function of contact time, pH and sorbate concentration.
The data have been interpreted in term of Langmuir isotherm. The uptake of Sr has been rapid and the sorption of strontium
has increased by increasing pH. The percentage sorption has decreased with increasing metal concentrations. The pH value after
sorption for the natrificated forms of bentonite starts already in the alkaline area and moves to the higher values. For the
natural bentonites the values occur in the neutral or in the acidic area. Sorption of Sr has been suppressed by presence of
competitive cations as follows: Ba2+ > Ca2+ > Mg2+ > NH4+ > K+ > Na+. By sorption on natrificated samples colloidal particles and pH value increase have been formed. The bentonite exposure as
a result of interaction of γ-rays has led to expansion of the specific surface, increasing of the sorption capacity and to
the change in the solubility of the clay materials.
Authors:Š. Vilček, Jana Mojžišová, Viera Bajová, Š. Paulík, L. Strojný, B. Ďurkovič, and Vlasta Hipíková
Pistl, J., Mikula, I., Kantíková, M., Kusová, I., Dusek, J., Pliesovský, J., Vankúsová, M. and Kollová, J. 1999: Bovine viral diarrhoea in cattle breeding - solving principles (in Slovak). Slov. Vet. Cas. 24 , 10-18.
Authors:V. Kerényi-Nagy, L. Bakay, M. Valachovič, V. Feráková, and I. Hodálová
The article deals with the distribution of three species from the genus Rosa in Slovakia. Field research, sampling and herbarium sheet revision at the Herbarium of Department of Botany, Faculty of Natural Sciences Comenius University (SLO) and the Herbarium of Institute of Botany, Slovak Academy of Sciences (SAV) showed new data on the distribution of Rosa pocsii Kerényi-Nagy, Rosa polyacantha (Borbás) H. Br. and Rosa zagrabiensis Vuk. et H. Br. in Slovakia. Detailed taxonomic description, distribution of selected taxa in Slovakia, a determination key and a comparative table of the sect. Rubiginosae are given.
Authors:Zuzana Németová, Silvia Kohnová, and Romana Marková
extreme floods in Slovakia and Central Europe have raised concerns about the reliability of flood frequency estimates, especially in ungauged basins, and also increased interest in regional flood frequency analysis [ 1 ]. The estimation of hydrological
The aim of this paper is to present the kinship terminology in the Ruthenian language and compare it with the kinship terminology in Slovak and Serbian. Some 270 years ago, groups of Ruthenians began migrating south from their homeland in the Carpathian mountains mostly from Zemplen and Šaroš counties (in present-day Slovakia) to the Bačka region (in present-day Serbia). Since the Ruthenian language has been in contact both with the Slovak and Serbian languages for a long time, we expect to find certain influence of these languages on the Ruthenian kinship terminology.