14 articles in this issue
J. Marku, K. Vaso
Efflorescence is a crystalline deposit of water soluble salts on the surface of ceramic masonry. In most cases, efflorescence can be removed by various cleaning methods depending on the chemistry of the crystalline deposit. But this, sometimes, may even w... see more
V. Jovanovska, A. Kuzelov
Srem sausage belongs to the group of durable delicatessen products whose production is known since a long time ago. It is produced by selected recipe at precisely determined tehnical characteristics of the maturation chamber. The change of relative humidi... see more
V. Damjanovic, V. Micic, Ž. Lepojevic
Marigold (Calendula officinalis L.) defined the particle size was extracted using 40, 50 and 60% ethanol as a solvent by classical procedure of maceration. The kinetics of extraction by given ethanol concentrations in relation to drug:solvent = 1:10 was s... see more
E. Mitreva, O. Filipovski
Providing quality in a business company is a matter related not only to the work done by individuals, but also with machines and the technology of the production processes as well. Therefore, it is necessary to provide statistical control in terms of esti... see more
Lj. Vukic
High concentrations of sulfide in (cumulative) tannery wastewater are the direct cause of very high toxicity of this effluent. Therefore it is necessary to remove this pollutant by the oxidation process. Hydrogen-peroxide is the oxidizing agent, which inc... see more
J. Tomovska, K. Bojkovska, V. Stefanovska, N. Tomovska
In this study, we determined the accuracy Vicam method for the determination of aflatoxin B1 in feed and aflatoxin M1 in milk and dairy products by applying the method of standard addition. Analytical yield in all causes ranged from 93 to 95%, indicating ... see more
M. Sokic, I. Ilic, Z. Gulišija, N. Štrbac
Industrial products are made from different materials, therefore existing metallurgical plants are not always able to adequately process them. Knowing the thermodynamic parameters, possibility and degree of removal of contamininats from the base metal in ... see more
M. Rajkovic, M. Stojanovic, Ð. Glamoclija, D. Toškovic, V. Miletic, V. Stefanovic, C. Lacnjevac
Plants have an important role in circuit of heavy metals in nature. Heavy metals are input into food chains mainly through plants. One of the ways in which heavy metals are input into food products is through contaminated plants and animals used for their... see more
M. Acanski, Ð. Vujic, Z. Nježic
The retention behaviour and separation ability of some estradiol derivatives were studied by HPLC on silica and C-18 commercially available columns. The mobile phases used were: benzene-ethyl acetate, benzene-tetrahydrofuran, benzene-acetonitrile, isoprop... see more
A. Kowal, D. Chamovska, M. Jotanovic, M. Kopczyk
Classification of fuel cells is presented. Progress in low temperature fuel cells fueled by hydrogen, methanol and formic acid is discussed and the possible future use of fuel cells is indicated. Ethanol is a special fuel because it is available from rene... see more
N. Kneževic, S. Cukut, S. Dunovic
One of basic problems faced in practice of landfill waste treatment is a problem with landfill leachate. The intensity of their production, thus their quantity, depends on numerous factors: landfill age, waste types, microclimatic parameters and similar. ... see more
B. Ilic, Ž. Adamovic, B. Savic, N. Stankovic
During the operation of power equipment in the process industry failure can occur, which if not timely detected and corrected, could lead to major failures and disasters, and a time to unplanned downtime of entire production lines, which can lead to high ... see more
B. Arsenovic, Z. Janjuš, E. Banjac
Global Warming Potential – GWP is an agreed quantity which enables determination of an individual green-house gas effect on a global warming process. GWP quantity illustrates how a unit mass of an observed gas contributes to increase of global warming mor... see more
Z. Petrovic, G. Tadic, P. Dugic, V. Aleksic, T. Botic, M. Petkovic
In the according with very intensive application of lubricant, the very large amounts of used lubricants which are harmful to the environment and human health are produced. In the European Union countries, the problem of used lubricants are permanently so... see more