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936 items
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Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study
Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2023)Recently, nanocrystal dispersions have been considered as a promising formulation strategy to improve the bioavailability of the deuterated pyrazoloquinolinone ligand DK-I-56-1 (7‑methoxy-2-(4‑methoxy-d3-phenyl)-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one). In the current study, the freeze-drying process (formulation and process parameters) was investigated to improve the storage stability of the previously developed formulation. Different combinations of lyoprotectant (sucrose or trehalose) and bulking agent (mannitol) were varied while formulations were freeze-dried under two conditions (primary drying at -10 or -45 °C). The obtained lyophilizates were characterized in terms ...... tion-1, samples were frozen at -80 "C for 3 h and then freeze- dried in a Beta 1–8 K freeze dryer (Martin Christ, Osterode am Harz, Germany) for 24 h, with primary drying at -10 "C and 0.340 mbar and secondary drying at 25 "C. Samples were stored in sealed vials at 25 "C, and physicochemical ...
... stability during storage was impaired for samples dried at -10 "C. Samples dried at lower temperature were more homogeneous and remained stable for three months. It was found that the optimal ratio of sucrose or trehalose to mannitol was 3:2 at a total concentration of 10% to achieve the best stability ...
... freeze-drying and after one month of storage. For lyophilization-2, samples were frozen at -50 "C for 3 h and then primary dried at -45 "C and 0.2 mbar for 21 h, which was followed by secondary drying at 20 *C for 30 h in a Telstar LyoBeta Mini freeze dryer (Spain). Vials were vacuum sealed ...Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić. "Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study" in European Journal of Pharmaceutical Sciences, Elsevier BV (2023). https://doi.org/10.1016/j.ejps.2023.106557
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Equilibrium and kinetic studies of the reactions between [Ru(terpy)(bipy)Cl]Cl complex and biologically important N-donor ligands
Studije u oblasti antikancerogenih karakteristika jedinjenja rutenijuma(III/II) izazivaju veliku pažnju već nekoliko godina otkako su neka od njih kao što su KP1019 (indazolijum-tetrahloridobis(H-indazol)rutenat(III)) i NAMI-A (imidazolijum) -trans-tetrahlorido(dimetilsulfoksid)indazolerutenat(III)) dostigao nivo kliničkog ispitivanja. Kompleksi rutenijuma u reakciji sa molekulom DNK formiraju prvenstveno gvanin- i adenin-adukt, kao komplekse platine. Takođe, nekoliko studija ukazuje na veoma jake interakcije sa proteinima. Međutim, kompleksi Ru(III/II) pokazuju generalno manje toksične efekte od lekova platine(II).1 Proučavali smo kinetiku reakcija supstitucije kompleksa [Ru(terpi)(bipi)Cl]Cl sa biološki važnim ligandima: dimetilsulfoksidom, gvanozin-5’-monofosfatom, ...Aleksandar Mijatović, Biljana Petrović, Ratomir Jelić, Živadin Bugarčić. "Equilibrium and kinetic studies of the reactions between [Ru(terpy)(bipy)Cl]Cl complex and biologically important N-donor ligands" in EuroAnalysis 16 - Challenges in Modern Analytical Chemistry, Belgrade : Division of Analytical Chemistry of the Serbian Chemical Society (2011)
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Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit
... oscillation velocity at the Kovilovača open pit Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open ...
... employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 9 International Conference MINING AND ENVIRONMENTAL PROTECTION May 2023, Serbia ANALYSIS OF A SIMPLIFIKD MODEL FOR DETERMINING ROCK MASS OSCILLATION VELOCITY AT THE KOVILOVAČA OPEN PIT Suzana Lutovac, Miloš Gligorić ...
... mechanical work. In the near of the blasting point, that energy destroys and crushes the rock mass. At a slightly greater distance that energy creates cracks and permanent deformations in the rock mass while at an even greater distance that energy transformes into elastic deformations. Seismic waves, that ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac. "Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia, Belgrade : University of Belgrade-Faculty of mining and geology (2023)
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Coal homogenization stockyard sizing “Tamnava – Zapad” case study
... towards homogenization of heating value, as the primary parameter. At the pits operated by Mibrag (Germany) the leading parameters for coal stockyard homogenization are heating value, at the Profen pit, and iron content at the Schleenhain pit [Ignjatović et al., 2007]. Thus different coals, even ...
... a reclaiming method which slices though several or all of the stacked layers. Thus the reclaiming direction should be at a 90o angle to the stacking direction. Therefore, at the stockyard of the "Tamnava - Zapad" pit the selected reclaimer is a scraper which can best slice crosswise through the ...
... enable greater comfort in organizing operations, increasing the number of piles and ensuring larger reserves at the stockyard. The relationship between the number of rows and reserves at the stockyard is shown in Figure 4 and Table 1 on the example of the "Tamnava - Zapad" pit. The example shows ...Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer. "Coal homogenization stockyard sizing “Tamnava – Zapad” case study" in Proceedings of 13th International Symposium Continuous Surface Mining, ISCSM 2016, / (2016)
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Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”
... E420-10 level of the point projected at the bench drift exit at level +420m is HE420-10=420.07m. The design speci�es to construct the adit from the GIP point upwards at the length of 151.63m, with inclination of 6.4% up to the point 2, which should be at the level H 2 =470.00m. Through the ...
... the seventies within the underground production system at that time, as well as by spatial position and geometry of the bauxite deposit (Qiang et. alli. 2005) (Figure 1). Figure 1 (1) Spatial position of mining and geological structures at the location "Podbracan" existing and (2) newly designed ...
... method, mining starts at the end of bench drift (EH) and generally pro- gresses toward the opening location of the level, i.e. the haulage drift (TH). Excavation dimensions of the bench drift (EH) are 3.5m×3.5m. The stope is made of the over pit part with overall height at 6.5m and the pillar next ...Aleksandar Milutinović, Aleksandar Ganić, Thamer Rayes Diyab, Rade Tokalić, Meri Ganić. "Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”" in Revista Escola de Minas, School of Mines Magazine, Sao paulo, Brasil : SciELO (2015)
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Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental ChemistryLjiljana Vasić, Laszlo Palcsu, Huang Fen. "Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8294-0
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Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support
Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović. "Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support" in Journal of Vibroengineering (2017). https://doi.org/10.21595/jve.2016.17321
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An oilfield in Libya: A new model to enhance waste water disposal
Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković. "An oilfield in Libya: A new model to enhance waste water disposal" in Energy & Environment (2016)
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Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu
Marija D. Prekajski (2014-04-04)Nanoprahovi kristalnih faza iz serije čvrstih rastvora u pseudo-binarnom sistemuCeO2-Bi2O3 sintetisani su primenom jednostavne i ekonomične samopropagirajućemetode na sobnoj temperaturi korišćenjem nitrata metala i natrijum-hidroksida kaopolaznih supstanci. Osim krajnjih članova niza, CeO2 i niskotemperaturne polimorfnemodifikacije α-Bi2O3, sintetisani su i čvrsti rastvori nominalnog sastava Ce1-xBixO2-δ,gde je x = 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7; 0,8; 0,9. Rezultati proučavanja metodomrendgenske difraktometrije na polikristalnom materijalu i ramanske spektroskopskeanalize pokazali su da su sintetisani prahovi sa nižim sadržajem bizmuta (x = 0,1 ...nanostrukturni materijali, čvrsti rastvori, CeO2, Bi2O3, rendgenskadifraktometrija praha, Ritveldova metoda, mikrostrukrurna analizaMarija D. Prekajski. "Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-04-04)
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Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content
Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugsNina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović. "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content" in Journal of Sol-Gel Science and Technology, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s10971-019-04925-4
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History of meteorite donations to the Collection of Minerals and Rocks of the University of Belgrade, Faculty of Mining and Geology (Serbia)
... collections such as the Collection of Minerals and Rocks at UBFMG is huge both from historical and scientific point of view. The preserved specimens remind us of the good interconnectedness within scientific and professional circles at the end of the 19th Century across the Europe. Although most ...
... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 9th International Conference Mineralogy and Museums 24-26 August 2021, Sofia, Bulgaria Extended ...
... Collection of Minerals and Rocks and 16 pieces are kept in the Paleontological Collection. In this paper we describe the collection of meteorites at the Collection of Minerals and Rocks, followed by a short history of meteorite collectibles in Serbia. Unfortunately, descriptions of the meteorite ...Alena Zdravković, Maja Milošević, Kristina Šarić, Ivana Jelić, Ana Černok. "History of meteorite donations to the Collection of Minerals and Rocks of the University of Belgrade, Faculty of Mining and Geology (Serbia)" in 9th International Conference Mineralogy and Museums, Sofia, Bulgaria, Earth and Man National Museum and Bulgarian Mineralogical Society (2021)
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Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2
Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...... preparation. However, additional peaks in the mass spectra were detect- able at a higher concentration of the metal complex (10�3 M, Fig. 5C). There are two new low intense, but rather broad peaks centred at m/z = 14 381 and at m/z = 14 546. Considering the fact that [RuCl2(bipy)2]Cl rearranges in aqueous ...
... er 2 0 1 1 . D o w n lo ad ed b y N at io n al L ib ra ry o f S er b ia o n 1 9 /1 2 /2 0 1 7 1 5 :3 2 :0 7 . View Article Online This journal is c The Royal Society of Chemistry 2011 Metallomics, 2011, 3, 1056–1063 1059 at m/z = 496.3 and m/z = 518.3 corresponding to ...
... to the proton and sodium adducts of LPC 16 : 0, respectively. A given amount of the lysophospholipid LPC 14 : 0 (peaks at m/z = 468.3 for the proton adduct and at m/z = 490.3 for the sodium adduct) has been added to all samples as internal standard, and the concentration of the product (LPC 16 : ...Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković. "Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2" in Metallomics, Oxford University Press (OUP) (2011). https://doi.org/10.1039/c1mt00088h
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Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete
Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija... Transform (FTIR) The infrared spectrum of the hardened mortar is given at Figure 8. In the spectrum of the hardened mortar, spectral bands at 3337, 1464, 1434, 1124, 990, 874, 850, 692, 615, 520, and 466 cm−1 are visible. The spectral band at 3337 cm−1 may be assigned to the H–H stretching vibrations due to ...
... second temperature interval (200–600 ◦C) endothermic peaks are observed at 373, 460, and 573 ◦C. The peaks at 373 ◦C and 460 ◦C originate due to the decomposition of the calcium-hydroxide [34], while the existence of the endothermic peak at 573 ◦C confirms the presence of quartz (river sand) and or silicate ...
... accuracy class 0.5%. Water absorption (determination of water absorption at atmospheric pressure) was determined according to EN 13755 and was conducted on the prisms with dimensions 40 mm × 40 mm × 160 mm. Prisms were firstly dried at the temperature of 70 ± 5 ◦C to the constant mass, and then were saturated ...Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović . "Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete" in Minerals, MDPI (2021). https://doi.org/10.3390/min11090925
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Open Educational Resources in Serbia
... As for the tertiary education, 27,801 students were enrolled in the first year of study at 7 accredited public universities, 6,728 at accredited private universities, 10,239 at public high schools and 1,582 at private high schools. # - will be assigend by editors. OPEN EDUCATIONAL RESOURCES ...
... Danijela Milošević is full professor and dean at the Faculty of Technical Sciences in Čačak. She belongs to the Department of Information Technologies. She graduated at Military Technical Faculty in Zagreb, Croatia, and received MSc and PhD degrees at the University of Belgrade. Her expertise includes ...
... institutions were until recently predominantly public, that is, state-owned, but the number of private educational institutions at all levels is rapidly growing, especially at the pre-school and tertiary level. Primary education in Serbia is mandatory and available for free of charge in public elementary ...Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević. "Open Educational Resources in Serbia" in Current State of Open Educational Resources in the “Belt and Road” Countries, Springer Singapore (2020). https://doi.org/10.1007/978-981-15-3040-1_10
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The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system
Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми... mikroemulzionog sistema voda/foluol/lutenso! ON 50 (tehnički oksoalkohol, i-CyE5) u funkciji temperature i sastava sistema. Za odredivanje faznog ponašanja u mikroemulziji korišćeni su vertikalni preseci Gibbs-ovih faznih prizmi (dija- grami oblika tela ribe). Jednofazni region sistema voda/foluol//Lutenso ...
... aktivnog šećera. Dodatak malih količina hidrofilnog alcoho! etoksilata (CisEtoo) sistemu voda/toluol/Lutenso/ ON 90, povecava kapacifet rastvaranja površinski aktivne supstance i pomera jednofazni region sistema ka višim temperaturama. Ključne reči: mikroemulzija, toluol, alki! poliglukozid, ...
... water (technical information sheet of Cognis, Monheim, Germany). The alcohol ethoxyl- ate CigEioo was synthesized under argon using a high vacuum line by Frank ef a/ [28] in the laboratory of JCNS-1 at Forschungszentrum, Julich. Water was deionized and twice distilled. Phase diagram determination ...Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic. "The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system" in Chemical Industry and Chemical Engineering Quarterly, National Library of Serbia (2016). https://doi.org/ 10.2298/CICEQ141105015I
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The effect of finite driving rate on avalanche distributions
Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear PhysicsSonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević. "The effect of finite driving rate on avalanche distributions" in Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing (2021). https://doi.org/10.1088/1742-5468/ac1f12
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Analysis of Blasting Impacts at the Open Pit Manastiriste near Topola on the Monastery Complex
Lutovac Suzana, Bajić Sanja, Gaćina Radmila, Urošević Katarina. "Analysis of Blasting Impacts at the Open Pit Manastiriste near Topola on the Monastery Complex" in Mining and Metallurgy Engineering Bor no. 2, Bor:Mining and Metallurgy Institute Bor (2016): 9-19. https://doi.org/10.5937/MMEB1602009B
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Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes
Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre. "Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes" in Geomorphology, Elsevier BV (2022). https://doi.org/10.1016/j.geomorph.2022.108488
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Compaction of Municipal Solid Waste
Jovana Janković Pantic, Dragoslav Rakić, Tina Đurić, Irena Basarić Ikodinović, Snežana Bogdanović (2022)Regardless of the numerous activities undertaken to reduce municipal solid waste, its annual volumes continue to grow. In Serbia, the most common and the only one form of waste disposal is at municipal landfills with daily compaction and soil covering. Municipal waste compacting is one of the basic components of the disposal process. Well compacted waste takes up less volume and allows much safer storage. In order to better predict the behavior of municipal waste at landfills, it is ...Jovana Janković Pantic, Dragoslav Rakić, Tina Đurić, Irena Basarić Ikodinović, Snežana Bogdanović. "Compaction of Municipal Solid Waste" in ICEG 2022: International Conference on Environmental Geotechnics, World Academy of Science, Engineering and Technology (2022)
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Effect of blasting on the adjacent building and mining structures at the open pit Kijevo
Lutovac Suzana, Tokalić Rade, Gluščević Branko, Vidanović Nebojša, Beljić Čedomir,. "Effect of blasting on the adjacent building and mining structures at the open pit Kijevo" in XXIV International Conference „ECOLOGICAL TRUTH“ ECO-IST16, Vrnjačka Banja, Serbia, :University of Belgrade – Technical Faculty in Bor (2016): 148-156