Biphenylsarean important class of organic compounds. Theyare importantin the field of natural products, polymersand the contemporary medical materials. Synthetic route cross-coupling (Suzukis) reaction, starting from benzenevia the iodoniumsaltto 4-nitro-4'-metilbiphenyl is chosen in this study. The resulting intermediates and final product of the ...

By Ljubica Vasiljević, Ivan Ćirić, Dragana Grujić

The aim of this paper was to develop and optimize the carvedilol tablets formulation using the full factorial design. The content of binder (PVP K30), content of disintegrant (crospovidone) and main compression force were used as the independent variables. Tablets were prepared by wet granulation. The percentage of released carvedilol from prepared...

By Predrag Sibinovic, Valentina Marinkovic, Radoslav Palic, Ivan Savic, Ivana Savic -Gajic, Dragan Milenovic, Rada Jankovic

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

A review on advanced photochemical processes influencing properties of materials is presented. Particular emphasis is given on photolytic processes for the removal of pollutants. Separately are presented methods for the removal of biological pollution. Major concern is paid to the methods for removal of persistent chemical pollutants. Two major...

By Ivan Juranić

Treatment of groundwater is the most important part of the scope of protection of natural resources, because no biological and bacteriological water there is no life on the planet. Implemented through consideration of all the negative elements in the water, determine the percentage of their toxicity and finding the most appropriate method for their...

By Velimir Šćekić, Radoje Cvejić, Sava Smiljić

The research described in this paper is directed towards the development and application of simultaneous potentiometric stripping analysis for the determination of heavy metals (lead, cadmium and zinc) in the soil of the northern part of the territory of Kosovo and Metohija. The experiments were carried out: I) the module solution (prepared from st...

By Ljiljana Babincev, Dejan Gurešić, Aleksandra Perić -Grujić, Ljubinka Rajaković

The separation ability and retention behaviour of normal phase TLC on silica with eight nonaqueous eluents, has been studied by measuring the retention constants of a series of synthesized benzimidazoles. The separation ability and retention behaviour are discussed in terms of the nature of the solute and eluent....

By Marijana Ačanski, Đura Vujić, Jovana Brkljača

Copper Oxyl Chloride 3Cu (OH)2∙CuCl2 is dual salt of copper, chlorine, oxygen and water. It is light green salt without smell. In water and organic solutions it is insoluble while it is easily solluble in acids. It is solluble in ammonia thus building complex units. It is more instable product since it is soluted after longer exposure to air a...

By Mustafa Burgić, Amir Fazlić, Mirela Burgić - Salihović

The researches in this paper are conducted on Au585Ag90Cu264Zn61 gold alloy for jewelry production by plasic processing. Jewelry manufacturing, in contemporary goldsmith industry, beside modern design and great appearance, also demands great mechanical and technical and technological properties. In ternary alloys of Au-Ag-Cu system, structural ...

By Radiša Perić, Zoran Karastojković, Zorica Kovačević, Dragoslav Gusković

This paper presents the results of tests perception of business environment and barriers to business by attitudes of entrepreneurs in local communities. It is well known that general region of the Balkan countries, is faced with the problem of the lack of investment as well as domestic and foreign direct investment. One of the major causes of cours...

By Mitar Perušić, Miladin Gligorić, Radislav Filipović