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 the recycling process can be predicted. Such approach facilitates a decisions about products de...

By Miroslav Sokić, Ilija Ilić, Zvonko Gulišija, Nada Štrbac

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 renewable environmentally friendly sources and its oxidation product (CO2) can be transformed by ph...

By Andrzej Kowal, Dragica Chamovska, Milovan Jotanovic, Maciej Kopczyk

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 humidity, air temperature during the maturation and changes of pH values in the stuffing mass has bee...

By Vangelica Jovanovska, Aco Kuzelov

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 estimating both the stability and the capability of production processes as well. However, control ...

By Elizabeta Mitreva, Oliver Filipovski

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 production. So, if the plants are cultivated on soil with high content of heavy metals then on...

By Miloš Rajković, Mirjana Stojanović, Đorđe Glamočlija, Dragan Tošković, Violeta Miletić, Violeta Stefanović, Časlav Lačnjevac

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. This leachate must not be discharge directly into the environment without their previous collec...

By Nebojša Knežević, Siniša Cukut, Saša Dunović

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 costs, environmental damage and endanger the safety of workers is therefore within the program ...

By Božo Ilić, Živoslav Adamović, Branko Savić, Nenad Stanković

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 solved and many directives about this problem is setted (in the starting EEC Directive 75/439 and...

By Zoran Petrović, Goran Tadić, Pero Dugić, Vojislav Aleksić, Tatjana Botić, Mirko Petković

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 a high accuracy of the method. The determination was made on aflatoxin B1 in (n ...

By Julijana Tomovska, Katerina Bojkovska, Velina Stefanovska, Natalija Tomovska

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, isopropanol-water and tetrahydrofuran-water in various proportions. The results are discussed in terms...

By Marijana Ačanski, Đura Vujić, Zvonko Nježić