Steel industry kept pace with actual trends for environmental protection in many ways – through different technological improvements considering environment protection, important share of recycling in the steel production, design of so called “eco-steels”, materials designed according to recent environmental directives and legisla...

By A. Mitovski, D. Živković, N. Štrbac, Lj. Balanović, D. Manasijević, I. Mihajlović, Ž. Živković

One of the most widely used high-energy nanocrystalline permanent magnetic materials are Nd-Fe-B alloys. Current R&D of Nd-Fe-B magnets is focused on three major topics: increase of magnetic energy, improvement of corrosion resistance and reduction of rare-earth content as a way of decreasing prices of final magnetic material with still signifi...

By N. Talijan

While proposed concepts to minimize, reuse and recycle wastes have generally, not solved the negative effects on environment, zero emissions concepts have arisen. The term Zero Emissions attracted special attention, as it is easily comprehensible and does not require translations. This concept is drawing mounting interest all around the world. In t...

By Z. Zavargo, A. Jokić

Strategijsko upravljanje ljudskim resursima postaje presudno za pronalaženje originalnih rješenja u proizvodnom sektoru. U ovome radu rasprava je usmjerena na planiranje ljudskih resursa u jednom metaloprerađivačkom preduzeću radi udovoljavanja sve većim tržišnim zahtjevima i poboljšanja konkuretskog položaja. Uključivanjem svi...

By M. Miljanovic, O. Spaic, M. Sokovic

Activated carbon is used in different industrial domains due to highly developed specific surface area and its specific chemistry. Properties of activated carbons obtained by pyrolyzing formaldehyde gels are presented in this paper. The gels were synthesized on several temperatures in order to follow the kinetics of gelling process. The relationshi...

By M. R. Vasic, R. Petrović

Absorption of elements by plants is regulated with a series of factors that depend on the plant in issue and conditions of living environment. The main factor that controls the mineral content in plants is a genetic potential for sustenance with different minerals. It is being exhibited with unequal sensitivity and ability for accumulation of speci...

By Lj. Babincev, Lj. Rajkovic

The influence of polyacrylamide (PAA; Mn between 5∙103 and 1.5∙106 gmol-1 ) on hydrogen evolution reaction at the polycrystalline gold in 0.5 M H2SO4 was studied using potentiodynamic measurements (5 mV/s) in the potential range from 0 to -0.6 V/she. It was concluded that formation of protective layer of PAA, adsorbed on the electrod...

By D. Ĉamovska, M. Cvetkovska, T. Grčev

Biodiesel is a mixture of methyl esters of long chain fatty acids, produced typically by alkalicatalyzed transesterification from vegetable oils. Biodiesel products in the EU must meet EN 14214 quality standard specification. In this specification, values of physical properties and impurities for commercial products are set out, including viscosity...

By J. Sadadinović, A. Kalfić

This paper presents results of theoretical research in changed optical properties due to the presence of boundaries and changes of boundary parameters in nanofilm-molecular crystals. The energy spectrum of excitons and their spatial distribution along the axis limits (in layers) were found through analytical and numerical calculations. The relative...

By S. Pelemiš, S. Armaković, J. P. Šetrajčić

There are three parameters that influences hydrolyses on milk and fermented milk products. Active acidity (pH) is one of that factors that determines speed of reaction and can influence on specific enzyme substrate. In production of yogurt, hydrolyses is measured by amount of peptides on different pH value. Maximum pH is determined to obtain maximu...

By J. Tomovska, N. Gruevska, N. Tomovska