Претрага
579 items
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The influence of structural modification of Pd(II) pincer-type complexes on the kinetics of substitution reactions
Snežana Jovanović Stević, Snežana Radisavljević, Aleksandar Mijatović, Biljana Petrović, Ana Kesić (2023)This mini-review summarizes the kinetic data obtained for the substitution reactions of some palladium(II) complexes containing bis-pyrazolylpyridine derivatives as pincer-type ligands with biologically significant nitrogen- and sulfur-donor biomolecules as nucleophiles. Three structurally different palladium(II) complexes were selected: [Pd(L1)Cl]+ (Pd1), [Pd(L2)Cl]+ (Pd2) and [Pd(L3)Cl]+ (Pd3) (where L1 = bis(2-(1H-pyrazol-1-yl)ethyl)amine, L2 = 2,6-bis(5-(tert-butyl)-1H-pyrazol-3-yl)pyridine, and L3 = 2,6-bis(5-(tert-butyl)-1-methyl-1H-pyrazol-3-yl)pyridine, while for the entering nucleophiles were used thiourea (Tu), L-methionine (L-met), and guanosine-5’-monophosphate (5’-GMP). Kinetic measurements were carried out for all systems as pseudo-first ...Snežana Jovanović Stević, Snežana Radisavljević, Aleksandar Mijatović, Biljana Petrović, Ana Kesić. "The influence of structural modification of Pd(II) pincer-type complexes on the kinetics of substitution reactions" in 2nd International Conference on Chemo and BioInformatics ICCBIKG 2023, 28-29 September 2023, Institute for Information Technologies, University of Kragujevac, Serbia, Kragujevac : Institute for Information Technologies, University of Kragujevac (2023) М33
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Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material
Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, PyrophylliteBorislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić. "Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material" in Applied Surface Science, Elsevier BV (2022). https://doi.org/10.1016/j.apsusc.2022.155114 М21а
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‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions
Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban. "‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions" in Boletín de la Sociedad Española de Cerámica y Vidrio, Elsevier BV (2020). https://doi.org/10.1016/j.bsecv.2020.06.005 М21
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Prospects for wider utilization of subgeothermal water resources: eastern Serbia case study
Stevanović Zoran, Saljnikov Aleksandar, Milenić Dejan, Martinović Mića, Goričanec Darko, Komatina Mirko, Dokmanović Petar, Antonijević Dragi, Vranješ Ana, Magazinović Sava (2011)Stevanović Zoran, Saljnikov Aleksandar, Milenić Dejan, Martinović Mića, Goričanec Darko, Komatina Mirko, Dokmanović Petar, Antonijević Dragi, Vranješ Ana, Magazinović Sava. "Prospects for wider utilization of subgeothermal water resources: eastern Serbia case study" in Geološki anali Balkanskog poluostrva no. 72, Beograd:Rudarsko-geološki fakultet (2011): 131-141. https://doi.org/10.2298/GABP1172131S M24
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Assessment of the Geotouristic Values of Devil’s Town, Serbia
Danijela Vukoičić, Danica Srećković-Batoćanin, Aleksandar Valjarević, Dušan Ristić, Milena Nikolić, Dragana Valjarević (2021)Geotouriyam, Geonasledje, M-GAM, Komparativna analiya, Đavolja Varoš, Peščane piramide, Stob Piramide, Melnik piramide, SrbijaDanijela Vukoičić, Danica Srećković-Batoćanin, Aleksandar Valjarević, Dušan Ristić, Milena Nikolić, Dragana Valjarević. "Assessment of the Geotouristic Values of Devil’s Town, Serbia" in Geologia Croatica, Croatian Geological Survey (2021). https://doi.org/10.4154/gc.2021.11 М23
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Facies and Origin of Tufa Deposits from the Gostilje River Basin and the Sopotnica River Basin (SW Serbia)
Natalija Batoćanin, Wojciech Wróblewski, Ivana Carević, Uroš Durlević, Violeta Gajić, Aleksandar Valjarević (2023)Natalija Batoćanin, Wojciech Wróblewski, Ivana Carević, Uroš Durlević, Violeta Gajić, Aleksandar Valjarević. "Facies and Origin of Tufa Deposits from the Gostilje River Basin and the Sopotnica River Basin (SW Serbia)" in Applied Sciences, MDPI AG (2023). https://doi.org/10.3390/app13053190 М22
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Старост варисцијских гранитоида источне Србије одређена LA ICP-MS U-Pb методом на цирконима. (LA ICP-MS U-Pb zircon dating of Variscan granitoids in Eastern Serbia).
Шарић Кристина, Ерић Сузана, Цветковић Владица, Peytcheva Irena, Јовановић, Д., Пачевски Александар (2014)Шарић Кристина, Ерић Сузана, Цветковић Владица, Peytcheva Irena, Јовановић, Д., Пачевски Александар. "Старост варисцијских гранитоида источне Србије одређена LA ICP-MS U-Pb методом на цирконима. (LA ICP-MS U-Pb zircon dating of Variscan granitoids in Eastern Serbia)." in Оптимално истраживање и одрживо коришћење геолошких ресурса : зборник радова XVI конгреса геолога Србије, Donji Milanovac, 22-25.05.2014, Београд:Српско геолошко друштво (2014): 232-233 M64
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Matematička fizika
Dragoslav Kuzmanović, Aleksandar Sedmak, Dobrica Nikolić, Ivan Obradović, Mihailo Lazarević, Nikola Mladenović (2021)Dragoslav Kuzmanović, Aleksandar Sedmak, Dobrica Nikolić, Ivan Obradović, Mihailo Lazarević, Nikola Mladenović. Matematička fizika, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2021 Без категорије
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Kvantitativna ocena režima i bilansa podzemnih voda u aluvijonu Velike Morave od Bagrdana do ušća u Dunavu
Aleksandar Balubdžić (2024)Aluvijalni sedimenti velikih reka raspolažu značajnim količinama podzemnih voda, što je zajedno sa površinskim vodama dozvolilo razvoj naselja i ljudskih aktivnosti. Ovaj razvoj uslovljava veće potrebe za vodnim resursima i njihovim kvalitetom. Sa povećanjem eksploatacije podzemnih voda, uticaj iste je značajniji i može da dovede do opadanja nivoa podzemnih voda i pogoršanja kvaliteta. Aluvijon Velike Morave ima značajno rasprostranjenje, usled čega predstavlja važno ležište izdanskih voda sa velikim eksploatacionim mogućnostima. Izradom hidrodinamičkog modela aluvijona Velike Morave od Bagrdana do ...Aleksandar Balubdžić. Kvantitativna ocena režima i bilansa podzemnih voda u aluvijonu Velike Morave od Bagrdana do ušća u Dunavu, 2024
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Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP
Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odzivIgor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović. "Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP" in Journal of Hydrology, Pirot, 2024, Elsevier BV (2024). https://doi.org/10.1016/j.jhydrol.2024.132068 М21а
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The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector
Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković. "The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12060908 М22
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Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)
This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić. "Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)" in Annales Societatis Geologorum Poloniae (2021). https://doi.org/10.14241/asgp.2021.16 М23
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Cytotoxic activity of tetradentate Schiff Base Copper(II) complexes
Istraživanje kompleksa bakra kao potencijalnih antikancerogenih agenasa nudi ohrabrujuće perspektive u odnosu na komplekse platine (II) računajući na smanjenu toksičnost, novi mehanizam delovanja, različit spektar aktivnosti i perspektivu neunakrsne rezistencije. Kompleksi Šifovih baza bakra(II) koji sadrže tetradentatne ligande acac2en tipa (acac2en (1); tfacac2en (3), acactfacacen (4), acacphacacen (6)) pokazali su važnu antioksidativnu aktivnost, visok potencijal za interakciju sa HSA i DNK, u prethodnim studijama. Zbog toga je bilo interesantno ispitati i uporediti potencijal antikancerogene aktivnosti in vitro, u odnosu ...Nevenka Gligorijević, Aleksandar Mijatović, Sandra Aranđelović, Rada Baošić . "Cytotoxic activity of tetradentate Schiff Base Copper(II) complexes" in The European Association for Cancer Research 2021 , eacr2021.org/sponsorship (2021) М34
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Challenges in using wastewater heat pumps in district heating systems
Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović, Dimitrije Manić (2022)Decarbonization of district heating systems requires ensuring significant amounts of renewable energy available in the proximity of the district heating network. One of the promising solutions is the utilization of purified water from wastewater treatment plants by heat pumps. However, as a heat source, wastewater treatment plants are characterized by annual variability of the flow and temperature of purified water. The consequence is the variability of recoverable heat potential. In this paper, the effect of variability is analyzed for ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović, Dimitrije Manić. "Challenges in using wastewater heat pumps in district heating systems" in 20th International Conference on Thermal Science and Engineering of Serbia, Niš, Serbia, October 18 – 21, 2022, Faculty of Mechanical Engineering in Niš (2022) М33
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Strategic Environmental Assessment and the precautionary principle in the spatial planning of wind farms – European experience in Serbia
Spatial determination planning is at an initial and very sensitive step in the development of wind farms. On one hand, it is important to maximize the potential of wind in a particular area, and on the other hand, it is important to achieve environmental protection (including the human population and natural heritage) in the same space at the same time. With this in mind, it is important to balance all the requirements that are relevant for reaching the optimal ...Boško Josimović, Aleksandar Cvjetić, Danilo Furundžić. "Strategic Environmental Assessment and the precautionary principle in the spatial planning of wind farms – European experience in Serbia" in Renewable and Sustainable Energy Reviews, Elsevier BV (2021). https://doi.org/10.1016/j.rser.2020.110459 М21а
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Microstructural and magnetic properties of electrospun hematite/cuprospinel composites
Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic MaterialsMira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić. "Microstructural and magnetic properties of electrospun hematite/cuprospinel composites" in Journal of Materials Science: Materials in Electronics, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s10854-020-03526-0 М22
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Proizvodnja električne energije iz elektrana na ugalј i prateća emisija CO2: komparacija EU-27 i Srbije
Velike elektrane su i u trećoj deceniji 21. veka i dalјe odgovorne za više od polovine proizvodnje električne energije u Evropi. U svom radu pretežno koriste fosilna goriva, što rezultira emisijom zagađujućih materija u vazduh. Stoga, zahvalјujući direktivama EU, kao i poremećajima na tržištu, emisije uglјen-dioksida iz velikih postrojenja za sagorevanje u EU-27 intenzivno se smanjuju u poslednje dve decenije. Iako je upotreba uglјa, posebno u zemlјama Evropske unije, u stalnom padu, ima prostora za dodatno smanjenje. Autori su ...Aleksandar Madžarević, Predrag Jovančić, Stevan Đenadić, Filip Miletić, Miroslav Crnogorac. "Proizvodnja električne energije iz elektrana na ugalј i prateća emisija CO2: komparacija EU-27 i Srbije" in Energija, ekonomija, ekologija (2023). https://doi.org/10.46793/EEE23-2.44M М52
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Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate
Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić (2015)Microemulsion systems with water, toluene and nonionic surfactants are interesting for application due to the excellent solvent properties of aromatic hydrocarbons. In this study, the pseudo-binary phase diagram (“fish-diagram”) of such a ternary system was investigated using a branched technical alkyl polyethoxylate. Lutensol ON 50 (i-C10E5) was considered a suitable surfactant. The system with technical branched i-C10E5 exhibits very long, and for compositions near optimum solubilization, i.e., the minimum content of surfactant needed for a bicontinuous microemulsion, extremely long ...микроемулзија, толуен, оксоалкохол етоксилат, термодинамичка стабилност, тернарни фазни дијаграми, дијаграми „fish“Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić. "Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate" in Chemical Industry and Chemical Engineering Quarterly (2015). https://doi.org/10.2298/CICEQ141012045I М23
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From mixed brookite/anatase TiO2 nanopowder to sodium titanates: Insight into morphology, structure, and photocatalytic performance
Nataša Tomić, Mirjana Grujić-Brojčin, Aleksandar Kremenović, Mirjana Novaković, Vladimir Lazović, Maja Šćepanović (2024)A method to obtain sodium titanate nanoribbons starting from a mixture of brookite and anatase TiO₂ nanopowder is described. As-prepared TiO2 nanopowder with a major brookite phase was used as a precursor in an alkaline hydrothermal approach, where the temperature was kept at 200 °C. The influence of hydrothermal treatment and consequent annealing temperature (T = 500 ) on the crystal structure, phase composition, and morphology of samples were investigated by X-ray powder diffraction (XRPD), Raman and FTIR spectroscopy, ...nanostrukturirani materijali, hemijska sinteza, difrakcija rendgenskih zraka, skenirajuća elektronska mikroskopija, kristalna struktura, katalizaNataša Tomić, Mirjana Grujić-Brojčin, Aleksandar Kremenović, Mirjana Novaković, Vladimir Lazović, Maja Šćepanović. "From mixed brookite/anatase TiO2 nanopowder to sodium titanates: Insight into morphology, structure, and photocatalytic performance" in Ceramics International, Elsevier BV (2024). https://doi.org/10.1016/j.ceramint.2024.10.063 М21
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Mechanical activation and silver supplementation as determinants of the antibacterial activity of titanium dioxide nanoparticles
Ljubica Anđelković, Marija Šuljagić, Vladimir Pavlović, Miljana Mirković, Boško Vrbica, Irena Novaković, Dalibor Stanković, Aleksandar Kremenović, Vuk Uskoković (2024)This study employed a novel synthetic approach involving a modified reverse co-precipitation method utilizing glacial acetic acid to synthesize α-Bi2O3 . X-ray powder diffraction and scanning and transmission electron microscopy analyses revealed the formation of a rod-like α-Bi2O3 microstructure. The prepared material was utilized to modify a glassy carbon paste (GCP) electrode for the development of an electrochemical sensor for acetaminophen (APAP) detection using differential pulse voltammetry (DPV). Cyclic voltammetry studies revealed that the GCP@Bi2O3 electrode exhibited enhanced electrochemical properties compared to the bare ...štapićasta a-Bi2O3 mikrostruktura, reverzna sinteza ko-precipitacije, elektrohemijski senzor, detekcija acetaminofenaLjubica Anđelković, Marija Šuljagić, Vladimir Pavlović, Miljana Mirković, Boško Vrbica, Irena Novaković, Dalibor Stanković, Aleksandar Kremenović, Vuk Uskoković. "Mechanical activation and silver supplementation as determinants of the antibacterial activity of titanium dioxide nanoparticles" in Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier BV (2024). https://doi.org/10.1016/j.colsurfa.2024.133890 М22