Prrenjas clay mineral is found in southeast Albania and has a high content on bentonite. Theinfluence of the sulphuric acid activation on the composition, structure and surface properties ofPrrenjas clay mineral is investigated in this study by means of elemental chemical analysis, X-RayDiffractometry, IR Spectroscopy and gas adsorption-desorption ...

By Altin Mele, Krenaida Taraj, Arjan Korpa

The reduction of the greenhouse gas emissions and the assessment of renewable energy sources are among today’s most challenging tasks. In this context biofuels have emerged as promising alternatives. Successful commercialization and market acceptance of biofuels are dependent on the presence of ions that induce negative impact on the vehicle ...

By Ljubiša Ignjatović, Ivana Sredović Ignjatović

Food allergy is a reaction of the body immune system to the presence of the proteins in the body introduced through food. Allergic reactions can affect the skin (hives), gastrointestinal organs (nausea, cramps, diarrhea), respiratory system (attenuation) and circulation (drop in blood pressure). In extreme cases, anaphylaxis can occur.. In this cas...

By Radoslav Grujić

One of the most used renewable energy sources worldwide is geothermal energy. Itrepresents the heat, originated by natural processes happen in the Earth interior. The hot springsphenomena are the most frequent natural manifestation of geothermal activity.Geothermal potentiality of some area can be estimated based on geothermal gradient. Geothermalg...

By Andrijana Stevanović, Boban Jolović

In this paper, the removal of methylene blue (MB) from aqueous solution by biosorption ontoapricot shellshas been investigated through batch experiments. Apricot shells were chosen as alocally available and abundant waste from fruit juice industry. Methylene blue is common pollutantof waste waters from textile industry.The influence of initial MB c...

By Tatjana Šoštarić, Marija Petrović, Jelena Milojković, Jelena Petrović, Marija Stanojević, Časlav Lačnjevac, Mirjana Stojanović

In this study, design of lab scale device for determination of separation properties ofmembranes is presented and analyzed. Device operates with different gas pressure betweenchambers, whereby gas streams perpendicular to the membrane. Using appropriate acquisitionsystem and applying mathematical formulas, mechanism for gas transfer through the mem...

By Aleksandar Grujić, Mirko Stijepović, Jasna Stajić Trošić, Jovana Ilić, Dragutin Nedeljković

Fly ash is useful for a variety of applications, because it is a plaster or silicate or aluminosilicate material which is in an isolated form and in the presence of water is combined with calcium hydroxide (from lime, portland cement or dust from furnaces) and formed mixtures with the characteristics of the binder. In this project analyzed the poss...

By Goran Tadić, Miladin Gligorić, Aleksandar Došić, Radenko Grujić

This paper studies the effect of process parameters on the sorption characteristics of zeolite 4A. The observed process are related to the influence of crystallization temperature, crystallization time and influence concentrations of Na2O. In parallel with the examination of the impact of these parameters on the capacity of water sorption of zeolit...

By Mladen Janković, Anđelko Tanasijević, Radislav Filipović, Mitar Perušić

The purpose of the study is to predict the ballistic strength of hard ultra-high molecular weight polyethylene fiber/phenolicballistic composites by implementing the full factorial experimental design. When designing ballistic composites two major factors are the most important: the ballistic strength and the weight of the protection. The ultimate ...

By Dimko Dimeski, Vineta Srebrenkoska

Dithionites of sodium and zinc (Na2S2O4 and ZnS2O4), also known asn hydrosulphites, are efficient reducing materials widely used in various industries.Mosto common application of Na2S2O4 is in textile industry and also as important ingredient in painting, printing and bleaching materials. In pharmacy it is widely used for drugs synthesis,...

By Mustafa Burgić, Amir Fazlić, Jasminka Sadadinović, Mirela Burgić -Salihović