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 worse the problem. Therefore, it would be most desirable to minimize or to prevent the effloresc...

By Jozefita Marku, Kozeta Vaso

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 studied. The quantity of total substances (q0, g/100g drugs), and the quantity of the residue su...

By Vladimir Damjanović, Vladan Mićić, Žika Lepojević

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

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

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

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

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 more than an unique mass of CO2, during certain period of time. The paper shows gases and su...

By Božidarka Arsenović, Zoran Janjuš, Emil Banjac