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Banja Luka, Bosnia and Herzegovina

The University of Banja Luka is a public university located in Banja Luka, Bosnia-Herzegovina. The University of Banja Luka was established on 7 November 1975 and at that point had 5 faculties. It is the oldest and largest university in Republika Srpska and second largest university in Bosnia and Herzegovina.Most of the current 16 faculties of the University of Banja Luka are situated in two campuses, both located close to the river Vrbas and not far from the city center.The Bologna Process started at all study programs at the University of Banja Luka in 2006/2007 school year, although some faculties started the Bologna reform earlier.Since 13. April 2011 University is full member of European University Association. It is also member of European Forest Institute and participate in TEMPUS, CEEPUS and 7th Framework Programme programme.Through student exchange programs cooperation university hosted students from Sapienza University of Rome, Plovdiv University, University of Strasbourg, University of Graz, University of the District of Columbia, Univerzitet u Prištini and University of Freiburg. Wikipedia.

Kukavica B.M.,University of Banja Luka | Veljovic-Jovanovic S.D.,University of Belgrade | Menckhoff L.,University of Hamburg | Luthje S.,University of Hamburg
Journal of Experimental Botany | Year: 2012

Cell wall isolated from pea roots was used to separate and characterize two fractions possessing class III peroxidase activity: (i) ionically bound proteins and (ii) covalently bound proteins. Modified SDS-PAGE separated peroxidase isoforms by their apparent molecular weights: four bands of 56, 46, 44, and 41 kDa were found in the ionically bound fraction (iPOD) and one band (70 kDa) was resolved after treatment of the cell wall with cellulase and pectinase (cPOD). Isoelectric focusing (IEF) patterns for iPODs and cPODs were significantly different: five iPODs with highly cationic pI (9.5-9.2) were detected, whereas the nine cPODs were anionic with pI values between pH 3.7 and 5. iPODs and cPODs showed rather specific substrate affinity and different sensitivity to inhibitors, heat, and deglycosylation treatments. Peroxidase and oxidase activities and their IEF patterns for both fractions were determined in different zones along the root and in roots of different ages. New iPODs with pI 9.34 and 9.5 were induced with root growth, while the activity of cPODs was more related to the formation of the cell wall in non-elongating tissue. Treatment with auxin that inhibits root growth led to suppression of iPOD and induction of cPOD. A similar effect was obtained with the widely used elicitor, chitosan, which also induced cPODs with pI 5.3 and 5.7, which may be specifically related to pathogen defence. The differences reported here between biochemical properties of cPOD and iPOD and their differential induction during development and under specific treatments implicate that they are involved in specific and different physiological processes. © 2012 The Author(s). Source

Grubor P.,University of Banja Luka
Medicinski arhiv | Year: 2011

Stabilization of fractures by external fixator is based on the mechanical connecting of the pins, screwed into the proximal and distal bone fragment. Site of fracture is left without any foreign materials, which is essential for prevention of infections. Aim of this work is to compare stability of constructs bone model-external fixators of different types (Ortofix, Mitković, Charneley and Ilizarov). Stability is estimated under compression and bending (vertical and horizontal forces of 100 kg magnitudes, with distances between pins of4 cm). METHODOLOGY: The mathematical-computer software (Tower, Planet and Planet Pro) was used in the laboratory for accurate measurements of MDP "Jelsingrad" company, Banjaluka. Interfragmental motions in millimeters at the appliance of vertical and horizontal forces were 2.80/2.56 at Ortofix (uniplanar fixator), 1.57/1.56 and fixator by Mitković-M20 (uniplanar fixator with convergent oriented pins), 0.16/0.28 at Charnely's external fixator (biplanar fixator), and 4.49/0.114 mm at Ilizarov's external fixator (fixator with two proximal and two distal rings, each attached on the 6 Kirschner wires). RESULTS AND DISCUSSION: It has confirmed that uniplanar fixation is easier and provides sufficient biomechanics circumstances in the site of fracture for bone healing, especially if the pins are oriented convergently. Ilizarov's fixator is multiplanar fixator, but its stability is dependent of tightness of wires, and provides adequate stability only in transversal plane. By other words, each fixator has its indications; selection of the fixator should be based on theirs mechanic characteristics, fracture geometry, and potential of bone healing, with permanent simplification of treatment, which has to be safe and acceptable for the patient. The main advantage of this study is Sits nature-the comparison of four most used external fixators, by the only one possible way-on the bone model. Each other way of comparison would result with much more questions than answers, due to unacceptable high bias of other parameters, which significantly influences on the results of the study. Source

Optimization of cellulose acrylate synthesis by reaction with sodium cellulosate and acryloyl chloride was carried out. Optimal conditions for conducting the synthesis reaction of cellulose acrylate were as follows: the molar ratio of cellulose/potassium-t-butoxide/acryloyl chloride was 1:3:10 and the optimal reaction time was 10 h. On the basis of elemental analysis with optimal conditions for conducting the reaction of cellulose acrylate, the percentage of substitution of glucose units in cellulose Y = 80.7%, and the degree of substitution of cellulose acrylate DS = 2.4 was determined. The grafting reaction of acrylate vinyl monomers onto cellulose in acetonitrile with initiator azoisobutyronitrile (AIBN) in a nitrogen atmosphere was performed, by mixing for 5 h at acetonitrile boiling temperature. Radical copolymerization of synthesized cellulose acrylate and 4-vinylpyridine, 1-vinylimidazole, 1-vinyl-2-pyrrolidinone and 9-vinylcarbazole, cellulose-poly-4-vinylpyridine (Cell-PVP), cellulose-poly-1-vinylimidazole (Cell-PVIm) and cellulose-poly-1- vinyl-2-pyrrolidinone (Cell-P1V2P) and cellulose-poly-9-vinylcarbazole (Cell-P9VK) were synthesized. Acrylate cellulose and cellulose grafted copolymers were confirmed by IR spectroscopy, based on elementary analysis and the characteristics of grafted copolymers of cellulose were determined. The mass share of grafted copolymers, X, the relationship of derivative parts/cellulose vinyl group, Z, and the degree of grafting copolymers of cellulose (mass%) were determined. In reaction of methyl iodide and cellulose-poly-4-vinylpyridine (Cell-PVP) the cellulose-1-methyl-poly-4-vinylpyridine iodide (Cell-1-Me-PVPJ) was synthesized. Cellulose acrylate and grafted copolymers were obtained with better thermal, electrochemical and ion-emulation properties for bonding of noble metals Au, Pt, Pd from water solutions. The synthesis optimization of cellulose acrylate was applied as a model for the synthesis of grafted lignin copolymers and grafted tannin polymers with vinyl monomers. Source

Pucar S.,University of Banja Luka
Journal of Intellectual Capital | Year: 2012

Purpose: The purpose is to analyze the impact of intellectual capital (IC) on export performance of firms and industries. Design/methodology/approach: This research used value added intellectual coefficient (VAIC) to measure intellectual capital as an independent variable. An export performance, as dependent variable, was measured as growth of exports. The sample consisted of 134 firms in Bosnia and Herzegovina (B&H). Empirical analysis was done by linear regression analysis. Findings: The results of regression analysis show a significant (p<0.01), positive influence of the value added intellectual coefficient and its components on the export growth in the sector of food and beverages and manufacturing of furniture and wood products in B&H. For other sectors there is no significant relation of independent and dependent variable. Practical implications: The results correspond with the results of the EU project that determined competitive advantages of B&H by Michael Porter's methodology. Results of this research raise the possibility of further testing of the author's methodology, called the measurement of intellectual capital in export performance (MICEP) methodology, in determining the competitive advantages, because it took considerably less time and money than EU project methodology. Also, a strong influence of IC on the export performance of sectors with competitive advantages opens the way for industrial policies based on intellectual capital, not only in B&H, but in other countries. Originality/value: This is the first research that has measured the impact of intellectual capital on export performance by using the VAIC methodology. © Emerald Group Publishing Limited. Source

Kosic D.,University of Banja Luka
Neural Networks | Year: 2015

This paper presents a novel artificial neural network with the Radial Basis Function (RBF) as an activation function of neurons and clustered neurons in the hidden layer which has a high learning speed, thus it is called Fast Clustered Radial Basis Function Network (FCRBFN). The weights of the network are determined by solving a number of linear equation systems. In addition, new training data can be given to the network on-line and the re-training is done at high speed using the Least Squares method. In order to test the validity of the FCRBFN, it is applied to 4 classical regression applications, and also used to build the functional adaptive predictive controller. Experimental results show that, compared with other methods, the FCRBFN with a small amount of hidden neurons could achieve good or better regression precision and generalization, as well as adaptive ability at a much faster learning speed. © 2014 Elsevier Ltd. Source

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