Calcium hydroxyapatite (CHA) has been synthesized biomimetically using simulated body fluid (SBF) alone and in combination with Fetal Calf Serum (FCS) and Eagle’s Minimum Essential Medium (EMEM). Chemical composition of the used SBF is like composition of human plasma, with small differencies in some ions concentrations, and pH value was adju...

By V. Jokanović, B. Čolović

In this paper will be introduced the newest research in high-temperature superconducting materials. In the first part of the paper will be analyzed discovery of superconductivity and the phenomena and effects related with this topic and the superconducting materials as well. In the second part of the paper will be analyzed our research of nanostruc...

By D. Lj. Mirjanić, J. P. Šetrajčić

The samples of rolled copper were mechanically and electrochemically polished in suitable electrolytes for electrochemical polishing. These substrate surfaces that had been prepared in advance, served as the basis for depositing of copper layers from two baths, namely, from the basic electrolyte(OR) with the following composition: 240 g/dm3 Cu...

By M. V. Tomić, M. G. Pavlović, Lj. J. Pavlović, N. D. Nikolić

A scope is given on the past and future progress of the Engineering. The origin of the term Engineering is elaborated and followed through the past. A stress is put on the Latin Ingenium, as oposed to the frequently mismatched origin in the word Engine. Further development through the Military until the Civil Engineering (and other varieties in the...

By S. Hadži Jordanov, O. Popovski

Unlike the classical management approach based on hierarchical relations within an organization, a behaviorist concept of business systems management attracts more and more light. This refers to new paradigms of management such as organizational behavior, as well as the culture and climate of an organization. Organizational behavior targets individ...

By B. Stavrić

Starting from the Fourier's law for stationary heat transfer and Ohm's law for DC through the resistor, the paper presents the analogy between thermodynamic and electrical quantities. Based on this analogy, has been used knowledge of circuit theory for of the heat transfer through walls in the multilayer characteristic positions to derive the schem...

By B. Pejović, M. Perušić, D. Vujadinović, D. Đorđić

Increase of ecological awareness affected the realization of more strict laws concerning the environment, which are being imposed in many countries. It also affected lubricant area and tendency for decreased pollution that lubricants can induce if they are uncontrollably spread around. Earlier it was believed that biodegradability is the most impor...

By M. Dugić, P. Dugić, R. Macura

This paper presents the results of authors' laboratory testing of the influence of steel fibers as fiber reinforcement on the change of properties of cement composite mortar and concrete type materials.Mixtures adopted - compositions of mortars had identical amounts of components: cement, sand and silica fume. The second type of mortar contained 60...

By D. Lj. Jevtić, D. M. Zakić, A. R. Savić

Synthetic sea water has been taken as a referential sample, in which Mg(OH)2 had been sedimented, in order to reduce biological effects and confirm reproducibility of results of the familiar composition sample. The synthetic sea water was prepared according to the scientifically developed procedure. Flotation experiments were performed in the ...

By M. Maksimović, Lj. Vukić, Đ. Vojinović, J. Mandić

The effect different deposition regimes (constant and reversing currents), on the powdered copper electrodeposits morphology were investigated. The morphology of electrodeposited copper powder was investigated using a scanning electron microscope (SEM). The effect of the current amplitude, cathodic to anodic time ratio and period of the current wav...

By M. G. Pavlović, M. V. Tomić, Lj. Pavlović, V. Maksimović, N. D. Nikolić