In the current study a ternary Cu-Ge-Sb system has been experimentally assessed. Chemical andphase compositions of the alloy samples from three vertical sections Cu-GeSb, Ge-CuSb and Sb-CuGe were studied using scanning electron microscopy (SEM) and energy dispersive spectroscopy(EDS) and confirmed by X-ray diffraction analysis (XRD). Hardness of th...

By Dejan Gurešić, Aleksandar Đorđević, Aleksandar Marković, Milica Tomović, Nadežda Talijan, Ivana Manasijević

A reliable operation of the equipment is primarily important for each installation. One of the measures of safe operation steam-boiler systems is purity pipes. Very acceptable method of determining the soiling pipe is a method of staining.In this paper is described the determination of soiling boiler tubes in power plant Ugljevik after a decade of ...

By Bosiljka Stojanović

Use of water for recreation or treatment of very it’s very important to maintain health and working capacity of the population. A significant number of people temporarily or permanently, used pools for that purpose. That is why today, in the developed countries, great attention is paid to the quality of water for recreation. The aim of this w...

By Bogoljub Antonić, Miladin Gligorić, Aleksandar Došić, Dragan Vujadinović, Ranko Grujić, Danijela Babić

The fruit of plane trees is used to obtain the powdered activated carbon. As the activating agent is used in the preparation of concentrated phosphoric acid. Completed the equilibrium adsorption of cationic methylene blue dye in the synthesized material. These results were fitted with three adsorption equilibrium model. The experimental results wer...

By Vladimir Dodevski, Branka Kaluđerović, Sanja Krstić, Đuro Čokeša, Danijela Brković

The process of galvanic-chemical protection according to the qualitative and quantitative characteristics, is one of the most complex wastewater pollutants. Also, from the surfaces of industrial solutions, as well as the protected parts of the stages of care, there are significant fumes, which pollute the surrounding air, which is to be treated pri...

By Božidarka Arsenović, Boško Ivanović

Based on relations for the maximum work at the closed thermodynamic system, the paper presents implementation of a general model for determining the minimum storage volume for compressed air. Due to the mechanical and thermodynamic imbalance of observed model, there are the conditions for obtaining the maximum work. Derived relations, which represe...

By Mitar Perušić, Branko Pejović, Radislav Filipović, Milenko Smiljanić, Mirko Radić

Our recent study on consolidation of marble samples with the purpose of culture heritageprotection occurred by periodical calcium oxalate precipitation on top of quasi parallelepipedicsamples. The overall process consisting of three stages of treatment, starting with 5 % calciumacetate solution for 60 minutes at 20°C, a draining step at 70°...

By Rihana Terzu, Edlira Baraj, Shun Yu, Christiane Förester, Holger Kropf, Kledi Xhaxhiu, Marsilda Come

Two different studies of the thermal aging of polyesters based on lactic and glycolic acidswere compared. Thermal degradation of poly(L-lactic acid) (PLLA), poly(L-lactic acid-co-glycolicacid) (PLLGA) and poly(DL-lactic acid-co-glycolic acid) (PDLGA) was studied by the dielectricthermal analysis (DETA). The aging was performed at 37C in vacuum ove...

By Aleksandra Porjazoska Kujundziski, Dragica Chamovska

The investigated material is a corrosion-resistant, Cu precipitation hardened steel 17-4PH,which undergoes a macroscopic contraction, as a result of applying the following heat treatment:double solution treatment at 1028°C for 1 h (condition A), ageing at 540°C for 4 h (conditionH1025). The second solution treatment at 1028°C was found ...

By R. Sowa, E. Roga, S. Arabasz, A. Dziedzic, I. Dul, A. Kowal, M. Parlinska-Wojtan

Powders based on oxides and oxyhydroxides of aluminum, depending on their characteristics, have very diverse applications in various areas of the chemical industry. In recent years, obtaining powders with nano scale particle size, significantly expanding the possibilities for the application of this type of materials, especially in the field of so-...

By Zoran Obrenović, Miladin Gligorić, Aleksandar Došić, Vladimir Damjanović