Laser Physics Letters
(IOP Publishing)
• 27 Jun 2019
Simović, Ana • Savović, Svetislav • Drljača, Branko • Djordjevich, Alexandar
A new design of a multimode plastic-clad silica optical fiber that takes the characteristic
W-shaped index profile is proposed. The bandwidth and steady-state loss are determined
for such a W-type plastic-clad silica optical fiber for the different structural parameters of
the fiber. We have shown that the bandwidth of a W-type plastic-clad silica optical fiber is
significantly higher (up to 15 times at a fiber length of 2 km) than the bandwidth of the singly clad step index plastic-clad ...
Mathematics and computer sciences
(Mathematics and computer sciences)
• 10 Oct 2022
Perić, Zoran • Marković, Aleksandar • Kontrec, Nataša • Nikolić, Jelena • Petković, Marko • Jovanović, Aleksandra
The Gaussian Q-function has considerable applications in numerous areas of science and engineering. However, the fact that a closed-form expression for this function does not exist encourages finding approximations or bounds of the Q-function. In this paper, we determine analytically two novel interval upper bound Q-function approximations and show that they could be used efficiently not only for the symbol error probability (SEP) estimation of transmission over Nakagami-m fading channels, but a ...
(Nova Science Publisher)
• 01 Apr 2024
Pergal, Marija • Balaban, Milica • Stanković, Dalibor • Petković, Branka
Poly(dimethylsiloxane)s (PDMS) have one of the lowest values of glass transition temperature among synthetic polymers, and indicate low-temperature flexibility, excellent thermal, thermo-oxidative and ultraviolet stability, very low surface energy, high hydrophobicity, high gas permeability and good biocompatibility. α,ω-Difunctionalized (or telechelic) PDMSs of low molecular weights are various starting prepolymers for the preparation of a wide variety of types of PDMS-based segmented copolymer ...
Surfaces and Interfaces
• 01 Apr 2024
Stanković, Dalibor • Ognjanović, Miloš • Fabián, Martin • Viktorovich Avdin, Vyacheslav • Manojlović, Dragan • Vranješ Đurić, Sanja • Petković, Branka
The goal of this work was to develop green electrode material that unites all advantages of domestic made, synthesized porous carbon powder and ceria dioxide nanoparticles known due to exceptional catalytic properties. Thermal decomposition of Novolac phenol-formaldehyde resin and cerium sulfate resulting in producing a high-performance CeO2 porous carbon material highly sensitive to dopamine (DA) electrooxidation. Morphological
and structural characteristics of the material were determined by ...
Dalton Trans.
• 01 Apr 2024
Savić, Nada • Petković, Branka • Vojnović, Sandra • Mojicevic, Marija • Wadepohl, Hubert • Olaifa, Kayode • Marsili, Enrico • Nikodinović-Runić, Jasmina • Djuran, Miloš • Glišić, Biljana
New dinuclear silver(I) complexes with N,N’,N’’,N’’’-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane (tpmc), [Ag2(NO3)(tpmc)]NO3·1.7H2O (1), [Ag2(CF3SO3)2(tpmc)] (2), and [Ag2(tpmc)](BF4)2 (3) were synthesized and characterized by NMR (1H and 13C), IR and UV-Vis spectroscopy, cyclic voltammetry and molar conductivity measurements. The molecular structures of the complexes were determined by single-crystal X-ray diffraction analysis. The spectroscopic and crystallographic data showed ...
Microchemical Journal
• 01 Apr 2024
Knežević, Sara • Ognjanović, Miloš • Nedić, Nemanja • Mariano, José • Milanović, Zorana • Petković, Branka • Antić, Bratislav • Vranješ Djurić, Sanja • Stanković, Dalibor
In order to ensure high food quality, one of the prime importance is the detection and quantification of histamine, well known marine food poison. In this work, we constructed novel electrochemical biosensor for the detection of histamine based on gold nanoparticles decorated on manganese dioxide (Au/MnO2) and used for modification of screen-printed carbon electrode (Au/MnO2@SPCE). The constructed sensor was then used for the estimation of histamine content in a single drop. Materials used in th ...
Electrochimica Acta
• 01 Apr 2024
Jevtić, Sonja • Vukojević, Vesna • Đurđić, Slađana • Pergal, Marija • Manojlović, Dragan • Petković, Branka • Stanković, Dalibor
This work present a new approach for the detection of relatively new herbicide pethoxamid (POA), a first electrochemical behavior and determination based on its oxidation on boron-doped diamond electrode in Britton-Robinson buffer solution at pH 4. Square wave voltammetric technique was used for quantification of POA at anodic potential of 1.35 V vs reference Ag/AgCl electrode. The proposed electroanalytical method is operational in the linear working range from 3 to 100 μM of POA with a limit o ...
Environmental Science and Pollution Research
• 01 Apr 2024
Pergal, Marija • Kodranov, Igor • Dojčinović, Biljana • Avdin, Viacheslav • Stanković, Dalibor • Petković, Branka • Manojlović, Dragan
Chlorine dioxide (ClO2) degradation of the organophosphorus pesticides azamethiphos (AZA) and dimethoate (DM) (10 mg/L) in deionized water and in Sava River water was investigated for the first time. Pesticide degradation was studied in terms of ClO2 level (5 and 10 mg/L), degradation duration (0.5, 1, 2, 3, 6, and 24 h), pH (3.00, 7.00, and 9.00), and
under light/dark conditions in deionized water. Degradation was monitored using high-performance liquid chromatography. Gas chromatography coupl ...
Electroanalysis
• 01 Apr 2024
Petković, Branka • Ognjanović, Miloš • Antić, Bratislav • Viktorovich Avdin, Vyacheslav • Manojlović, Dragan • Vranješ Đurić, Sanja • Stanković, Dalibor
The homemade, porous carbon material, thermolysis prepared from Novolac phenol-formaldehyde resin, in situ modified with Co3O4 nanoparticles and mixed with single-wall carbon nanotubes, was used in selective sensing of prominent antioxidant α-lipoic acid
(LA). XRD, SEM and EIS measurements were used for characterization of material composition, structure, morphology and improved conductivity. The quantification of LA at TPCo3O4&SWCNTCPE was done by a squarewave voltammetric technique in BR buff ...
Journal of the Science of Food and Agriculture
(Wiley-VHCA AG, Zurich, Switzerland)
• 11 May 2019
Pecev-Marinković, Emilija • Miletić, Ana • Tošić, Snežana • Pavlović, Aleksandra • Kostić, Danijela • Rašić Mišić, Ivana • Dekić, Vidoslav
BACKGROUND: Pesticides are potentially toxic to humans and can produce both acute and chronic health effects, depending on the quantity and the ways in which a person is exposed. Exposure to pesticides can cause serious health problems. Infants and young children are particularly sensitive to these contaminants because their brains and organ systems are not fully developed. For this reason, it is important to determine the quantities of pesticides in baby food.
RESULTS: The aim of this study wa ...
