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Belgrade, Serbia

The University of Belgrade is the oldest and largest university in Serbia.Founded in 1808 as the Belgrade Higher School in revolutionary Serbia, by 1838 it merged with the Kragujevac-based departments into a single university. The University has nearly 90,000 students and over 4,200 members of teaching staff. Since its founding, the University has educated more than 330,000 bachelors, around 21,300 magisters, 29,000 specialists and 12,600 doctors. The University comprises 31 faculties, 11 research institutes, the university library, and 7 university centres. The faculties are organized into 4 groups: social science and humanities; medical science; natural science and mathematics; and technological science.The University of Belgrade has found its place amongst the top 400 universities in the world, according to the most recent global ranking carried out by the Shanghai List. In the area of mathematics, it is ranked among the top 150 universities in the world. Wikipedia.

Atrial fibrillation (AF) commonly co-exists with heart failure (HF). The risk factors for and prognostic implications of incident HF development in patients with first-diagnosed AF and structurally normal hearts are poorly defined. In a cohort of patients with first-diagnosed AF and structurally normal hearts on baseline echocardiography, we investigated baseline risk factors for the development of incident HF and tested the hypothesis that incident HF was an independent predictor of adverse outcomes during a mean 10-year follow-up period. This was a registry-based, observational cohort study of 842 patients initially diagnosed between 1992 and 2007 (mean age 51.6 ± 12.4 years), whereby 83 (9.9%) developed HF. The linearized rate of incident HF was 0.97% [95% confidence interval (CI) 0.78-1.19%] per 100 patient-years. Baseline history of hypertension, diabetes mellitus, dilated left atrium, and low-normal LVEF (50-54%) were multivariable predictors of subsequent HF (all P < 0.05). HF development was significantly associated with increased number of hospitalizations, AF progression, any stroke/peripheral thrombo-embolism, ischaemic stroke, cardiovascular death, and all-cause mortality (all P < 0.001). Kaplan-Meier 10-year estimates of survival free of the composite endpoint of AF progression, thrombo-embolism, and mortality were significantly worse for AF patients with incident HF compared with those without HF (68.8%; 95% CI 64.7-72.9 vs. 25.9% 95% CI 15.7-36.1, P < 0.001). Underlying co-morbidities or subtle alterations such as mild left atrial dilatation or low-normal LVEF in the absence of overt underlying heart disease are baseline independent risk factors for incident HF during a long-term follow-up. Incident HF was an independent predictor of adverse outcomes in patients initially diagnosed with first-diagnosed AF and structurally normal hearts. These findings could facilitate the identification of AF patients at increased risk for adverse outcomes within the cohort perceived as being at 'low risk' given a structurally normal heart on echocardiography.

Djordjevic M.,University of Belgrade
Physical Review Letters | Year: 2014

Both charged hadrons and D mesons are considered to be excellent probes of QCD matter created in ultrarelativistic heavy ion collisions. Surprisingly, recent experimental observations at LHC show the same jet suppression for these two probes, which - contrary to pQCD expectations - may suggest similar energy losses for light quarks and gluons in the QCD medium. We here use our recently developed energy loss formalism in a finite-size dynamical QCD medium to analyze this phenomenon that we denote as the "heavy flavor puzzle at LHC." We show that this puzzle is a consequence of an unusual combination of the suppression and fragmentation patterns and, in fact, does not require invoking the same energy loss for light partons. Furthermore, we show that this combination leads to a simple relationship between the suppressions of charged hadrons and D mesons and the corresponding bare quark suppressions. Consequently, a coincidental matching of jet suppression and fragmentation allows considerably simplifying the interpretation of the corresponding experimental data. © 2014 American Physical Society.

Radetic M.,University of Belgrade
Journal of Photochemistry and Photobiology C: Photochemistry Reviews | Year: 2013

Extraordinary photocatalytic activity, non-toxicity, high availability, biocompatibility, and low price make TiO2 nanoparticles particularly attractive for manufacturing of different high value-added products. During the past several years, many efforts have been made to immobilize TiO2 nanoparticles onto textile materials with an aim to produce goods with multifunctional properties such as UV protective, self-cleaning and antibacterial. The processing of textile materials with TiO2 nanoparticles is relatively simple, but insufficient binding efficiency between certain fibers and TiO2 nanoparticles imposes a problem concerning the stability and durability of nanocomposite systems during their exploitation. Therefore, recent studies were more oriented toward chemical and physico-chemical modification of fiber surfaces that may enhance the binding efficiency of TiO2 nanoparticles. This article looks at some latest advances in finishing of different textile materials with TiO2 nanoparticles. © 2013 Elsevier B.V.

Popovic V.,University of Belgrade
Journal of Clinical Endocrinology and Metabolism | Year: 2013

Identification of adults with GH deficiency (GHD) is challenging because clinical features of adult GHD are not distinctive and because clinical suspicion must be confirmed by biochemical tests. Adults are selected for testing for adult GHD if they have a high pretest probability of GHD, ie, if they have hypothalamic-pituitary disease, if they have received cranial irradiation or central nervous system tumor treatment, or if they survived traumatic brain injury or subarachnoid hemorrhage. Testing should only be carried out if a decision has already been made that if deficiency is found it will be treated. There are many pharmacological GH stimulation tests for the diagnosis of GHD; however, none fulfill the requirements for an ideal test having high discriminatory power; being reproducible, safe, convenient, and economical; and not being dependent on confounding factors such as age, gender, nutritional status, and in particular obesity. In obesity, GH secretion is reduced, GH clearance is enhanced, and stimulated GH secretion is reduced, causing a false-positive result. This functional hyposomatotropism in obesity is fully reversed by weight loss. In conclusion, GH stimulation tests should be avoided in obese subjects with very low pretest probability. Copyright © 2013 by The Endocrine Society.

Ciric-Marjanovic G.,University of Belgrade
Synthetic Metals | Year: 2013

The recent progress made in the period 2010-2012 in the preparation and application of polyaniline (PANI) composites with metals, metalloids and nonmetals is reviewed. A systematic overview of PANI composites with noble (Au, Pt, Pd, and Ag) and non-noble transition metals (Cu, Ni, Co, Fe, Ta, Zn, Mn, Zr, and rare earth metal Ce), as well as with main-group post-transition metals (Bi and Al) and alloys, is given. PANI/Si composites were in the focus of this review regarding PANI/metalloid composites, while an overview of PANI/nonmetal composites was focused on PANI/C, PANI/S and PANI/Se composites. Special attention was paid to PANI composites with C nanomaterials such as carbon nanotubes (CNTs) and graphene. Ternary PANI/metal/nonmetal composites are also comprehensively reviewed from an application point of view. © 2013 Elsevier B.V. All rights reserved.

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