Svrha ovog rada je pregled antiseptika i defi niranje značenja stomatoloških antiseptika u kontroli i eliminaciji mikroorganizama kao
sastavnog dijela prevencije i terapije bolesti zuba i parodonta u ...dječjoj stomatologiji. Dosad su poznate karakteristike i mehanizam
djelovanja pojedinih antiseptika te je doprinos rada predstaviti indikacije za njihovu primjenu u svakodnevnom radu stomatologa,
osobito u dječjoj i preventivnoj dentalnoj medicini.
Hydrogen production via electrolysis of water from alkaline aqueous electrolytes is a well-established conventional technology. However, due to high energy requirements of about 4.5–5
kWh/m
n
3 H
2 ...in most industrial electrolysers, the cost of hydrogen produced in such a way is high. This is a limiting factor for the use of this method on a large scale, except in countries where the electricity is very cheap.
There were various attempts to improve this process, like zero-gap cell geometry, development of new diaphragm materials, development of new electrocatalytic materials for electrodes, etc. We tried here to use ionic activators to reduce energy consumption.
Two types of activators, both ethylenediamine complexes of cobalt, were used separately or in combination with some molybdates.
The activation energies were significantly decreased in the presence of single ionic activators. However, the best results regarding the activation energy reduction were obtained when combinations with the molybdate were used.
On the basis of the results of our experiments there is a strong indication that the activation with ionic activators reduces energy needs per mass unit of hydrogen produced for more than 10% in some cases, compared to those of non-activated electrolytes.
The main objective of this paper is to examine the impact of education, on decision tu purchase insurance. We measure the impact of education both through years of formal education and capital ...invested in research and development. The focus is on insurance in agriculture, due to the fact that Serbia, and it's prominent province of Vojvodina possess mainly agricultural lands. We use regression method incorporating several macro-economic variables as control variables: GDP per capita, index of economic freedom, foreign direct investments and private sector credit, to name few. Main results indicate significant and positive influence of education, as the educational elasticity of demand for insurance is significantly higher than one.
The influence of magnetic properties of cathodes on the separation factor and hydrogen evolution process was investigated. The cathodes used in standard electrolyte and in activated one were pure Ni ...and the electrocatalytic coatings with definite compositions of transition metals on Ni substrate. The obtained correlations between electrocatalytic activity and magnetic properties of the investigated cathode materials issue from their d-electronic configuration.
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