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Упит dcterms_subject_txt:Fluid Flow and Transfer Processes

2357 items

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... general formula MpHqLr, where p, q, and r are the stoichiometric indices of the components in the complex. A negative value for q refers to proton removal or hydroxide ion addition during formation of the complex. Thermodynamically, these two processes are equivalent and cannot be distinguished by pot ...
    ... a.). The pH of the solutions was adjusted using HClO4 and NaOH. The sodium hydroxide solution was prepared from concentrated volumetric solution (Merck, p.a.) by diluting with freshly boiled double-distilled water, cooled under constant flow of purified nitrogen. The alkali concentration was checked ...
    ... the nucleophile makes access and bond formation difficult. As mentioned above, Ru(II) complexes have a huge potential for antitumor activity. The investigation of their interactions with biomolecules could help a lot toward better understanding of some cell processes. On the basis of the chemical ...

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... deformation or fluid flow-induced crystallization of some very-fine- grained white micas during the predominantly brittle D> deformation phase. 5.5 Origin of the Southern and Northern Triassic units Based on our data the Late Jurassic-Early Cretaceous metamorphism and associated D, deformation ...
    ... Paleogene-Neogene strike-slip tectonics (e.g. Csontos et al. 2004; Ilic and Neubauer 2005) and the for- mation of a Neogene extensional basin system due to slab- rollback processes (e.g. Ustaszewski et al. 2010; Matenco and Radivojevic 2012; Toljic et al. 2013; Andric et al. 2017). 2.1 Geology ...
    ... (Matenco and Radivo- jJevic 2012; Toljic et al. 2013; Handy et al. 2015; Le Breton et al. 2017). 6 Concluding remarks We applied multi-scale structural analysis, IIlite Crys- tallinity measurements, and K/Ar dating in order to trace the record of obduction and collision processes in part ...

  • Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović (2022)
    This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...
    системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композиција

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • Determining the Impact of Cutting Elements State on the Bucket–Wheel Excavator Vibration and Energy Consumption

    Filip Miletić, Predrag Jovančić, Miloš Milovančević, Miloš Tanasijević, Stevan Đenadić (2022)
    Background There are two types of specifc sizes’ measurements. The frst is the measurement of energy consumption in a working technological process, and the second is the measurement of vibration, which is displayed over amplitudes of speed. There is an interplay between these two processes. Increasing the power consumption, the value of the vibration speed amplitudes increases. Purpose The process of the determination of machining parameters was based on minimizing the power consumption and vibration of the cutting tool, ...
    merenje, potrošnja energije, vibracije, radni vek reznog elementa

  • Classifying large strains from digital imagery: application to analogue models of lithosphere deformation

    Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer (2021)
    ... interested in reconstructing the time evolution of 2D plane deformation of analoguemodels of tectonic processes. Under relevant forcings, these models develop internaldeformation, such as faults, and broader zones of deformation. We use Particle Image Velocimetry(PIV) to derive incremental displacements ...
    ... Kasbergen3, and Ernst Willingshofer1 1Utrecht University, Faculty of Geosciences, Department of Earth Sciences, Utrecht, Netherlands (d.b.t.broerse@uu.nl) 2Department of Regional Geology, Faculty of Mining and Geology, University of Belgrade, Belgrade, Serbia 3Faculty of Civil Engineering and Geosciences ...
    ... a spatial reference, and material moves through the area in view, displacementsat any given time refer to fixed locations in space, and not to specific material points. Byreconstructing the path of material, we can follow small regions of material while they translate,rotate and change shape. To aid ...

  • Filling of dolines with aeolian sediments in the high-mountain karst of the Dinarides (Mt. Durmitor, Montenegro)

    Mirela Djurović, Violeta Gajić, Predrag Djurović (2022)
    Filling of dolines with aeolian sediments, one of the less frequently described ways in which they are filled, is analysed in the present study on an example of a doline in the high-mountain karst of the Dinarides. There is a series of deep dolines on a broad ridge (about 2450 m a.s.l.) on Mt. Durmitor (Montenegro) in the southeastern part of the Dinarides. The accumulation of very fine-grained sand that almost completely fills one of the dolines was analysed. ...
    Doline, Zapuna, Eolski sedimenti, Karst, Dinaridi, Crna Gora

  • Serbian Society of Geomorphologists

    Dragana Đurić, Jelena Ćalić (2019)

  • Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach

    Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2021)
    Poor water solubility of new chemical entities is considered as one of the main obstacles in drug development, as it usually leads to low bioavailability after administration. To overcome these problems, the selection of the appropriate formulation technology needs to be based on the physicochemical properties of the drug and introduced in the early stages of drug research. One example of the new potential drug substance with poor solubility is DK-I-60-3, deuterated pyrazoloquinolinone, designed for the treatment of various neuropsychiatric ...
    pyrazoloquinolinones, nanocrystals, wet media milling, fasted/fed bioavailability
    ... phase containing acetonitrile and 0.1% formic acid (50:50, v/v) was eluated at the flow rate of 0.3 mL/min. The column tempera- ture was set to 35 ◦C. Detection and quantification of DK-I-60-3 and internal standard were performed in positive HESI mode (m/z = 328.10–282.05 and m/z = 349.00–303.85, respec- ...
    ... ◦C with a heating rate of 10 ◦C/min. The measurements were conducted under nitrogen flow (50 mL/min) by DSC 1 (Mettler-Toledo AG, Analytical, Greifensee, Switzerland). The onset and peak temperature, and enthalpy were evaluated by STAR® SW 12.10 software. 2.2.2. Nanocrystal Dispersions Preparation ...
    ... nitrogen flow during the measurements was set to 50 mL/min. X-ray Powder Diffraction Analysis (XRPD) Nanocrystal dispersions with different particle sizes, corresponding suspension, and unprocessed DK-I-60-3 were investigated by X-ray powder diffraction (XRPD). Dispersions were centrifuged, and the analysis ...

  • Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?

    Ana Mladenović, Jelena Ćalić (2021)
    Methods to determine seismic hazard in any region vary depending on the regional seismicity, but can be roughly grouped into two main groups: one based on probabilistic methods that use data about known seismicity in the region, and another, which is based on data related to the faulting processes and determination of seismically active faults. Both groups of methods are relatively good for seismically active regions. However, in regions of low seismic activity and slow deformations, there is neither ...

  • Pokazatelji recentne tektonske aktivnosti u speleološkim objektima Dževrinske grede (istočna Srbija)

    Ana Mladenović, Jelena Ćalić (2022)
    Sistem Timočkog raseda predstavljen je sistemom desnih transkurentnih raseda generalnog pružanja sever – jug, koji su bili aktivni u periodu oligocena i miocena u okviru Karpato-balkanskog orogena. Početak njihove aktivnosti vezuje se za rotaciju tektonskih jedinica Karpato-balkanida (Dacia Mega Unit) oko rigidne Mezijske jedinice. Aktivnost ovih transkurentnih raseda je akomodirala ovu rotaciju, pa se smatra da je kumulativno kretanje duž Timočkog raseda tokom perioda njegove aktivnosti bilo do 100 km. Usled kompleksnih tektonskih rotacija, rasedi ovog sistema doveli su ...
    Тимочки расед, Џеврински расед, Балта расед, спелеолошки објекат

  • Joint interpretation of paleomagnetic, structural and AMS results from the Vardar Zone of Serbia

    Emo Marton, Marinko Toljić, Vesna Lesić, Vesna Cvetkov (2021)

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    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 ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... significant erosion in an area with such a low geothermal gradient (due to the uplift of the orogen and high thermal conductivity), but could also indicate a higher heat flow in the past, ice., processes related to the evolution of the oceanic crust of the Tethys. Considering the results of the methods ...
    ... the end of the Late Cretaceous, which was due to the collisional processes and upli� of the Dinarides (Van Unen et al., 2019). �is led to the deposition of tectonically controlled turbidites near Nevesinje (Eocene carbonates and siliciclastics similar to the Promina Beds; Vlahović et al., 2012; ...
    ... at the end of the Late Cretaceous, which was due to the collisional processes and uplift of the Dinarides (Van Unen et al., 2019). This led to the deposition of tectonically controlled turbidites near Nevesinje (Eocene carbonates and siliciclastics similar to the Promina Beds; Vlahovic¢ et al., 2012; ...

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... enhanced knowledge transfer between academia and enterprises. In the envisaged network of institutions OER materials from both sources will be available on the web for everyone, anytime, which will broaden knowledge acquired within higher education institutions, on the one hand, and foster life-long ...
    ... described and tagged in a standard way, and in machine readable form. This makes resources more easily located by search engines, and results returned by are more relevant. Both educators and learners can find and compare described and tagged learning materials more efficiently, and select the ...
    ... mathematics and informatics at the University of Belgrade Faculty of Mining and Geology and director of the University of Belgrade Center for e-learning and distance education. He has published four books and more than 130 scientific papers related to artificial intelligence methods and tools, language ...

  • Uticaj karakteristika ispirnih fluida na pribušotinsku zonu naftnih i gasnih bušotina

    Tatjana A. Malbašić (2016)
    bušotine, nafta, gas, ispirni fluidi, bušenje

  • Fizičko-hemijsko raspadanje krečnjaka ugrađenih u objekte Beogradske tvrđave i mogućnost konsolidacije

    Maja Z. Franković (2022)
    Beogradska tvrđava, spomenik kulture od izuzetnog značaja za Republiku Srbiju, izgrađena je od krečnjaka badenske starosti. Njihova litološka heterogenost, u sadejstvu sa uticajima okruženja, rezultira visokim intenzitetima raspadanja. Korelacijom intrinzičnih sa ekstrinzičnim faktorima, definisani su fizičko-hemijski procesi raspadanja ugrađenih mikrofacija krečnjaka. Aplikacijom neorganskih konsolidanata na karbonatnoj bazi (nano-kreča i Ca-acetoacetata) i alkoksisilana, te korelacijom fizičko-mehaničkih svojstava pre i nakon tretmana, ispitana je efektivnost u pogledu zaustavljanja dekohezije krečnjaka. Određivanjem petroloških, tehničkih svojstava i mapiranjem formi raspadanja Mračne kapije kao ...
    krečnjaci, forme i intenziteti degradacije, fizičko-hemijsko raspadanje, konsolidacija, nano-kreč, Ca-acetoacetat, alkoksisilani, Mračna kapija

  • Primena modela transporta idealne čestice na primeru razvoja Površinskog kopa Jakovačka Kumša

    Dušan Polomčić, Dragoljub Bajić, Vesna Ristić Vakanjac, Marina Čokorilo Ilić (2019)
    Hidrodinamičkim proračunima transporta „idealne“ čestice prikazan je uticaj eksploatacije peskova sa površinskog kopa „Jakovačka Kumša“ na beogradsko izvorište podzemnih voda. Potencijalnu opasnost od zagađenja podzemnih voda izvorišta za vodosnabdevanje čini skup različitih procesa koji se odvijaju na površinskom kopu. U radu je prikazano poređenje dva modela transporta idealne čestice. Prvi model se odnosi na analizu putanje i vremena putovanja idealne čestice od površinskog kopa do izvorišta za stanje pre otvaranja kopa, dok se drugi model odnosi na stanje kada ...
    upravljnje podzemnim vodama, zaštita podzemnih voda, hidrodinamički model, metoda praćenja „idealne“ čestice, modflow, modpath

  • Numerical simulation of the Late Jurassic closure of the Vardar Tethys

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2021)
    ... phase where spreading regime is dominant. Effect of duration and magnitude ofthe second phase on model evolution is also explored. Our so far obtained simulations were able to reproduce the westward obduction and certainextension processes along the active (European) margin, which match the existing ...
    ... 4.0 License. Numerical simulation of the Late Jurassic closure of the VardarTethys Nikola Stanković, Vesna Cvetkov, and Vladica Cvetković University of Belgrade, Faculty of Mining and Geology, Serbia (nikola.stankovic@rgf.rs) We report updated results of our ongoing research on constraining geodynamic ...
    ... zone and presumably subduction related Timok MagmaticComplex, both Late Cretaceous in age as well as Jurassic ophiolites obducted onto the Adriaticmargin. In our simulations we initiate an intraoceanic subduction in the Early/Middle Jurassic,which eventually transitions into an oceanic closure and subsequent ...

  • 2D Numerical Simulation of Intraoceanic Subduction during the Upper Jurassic Closure of the Vardar Tethys

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2020)
    ... phase where spreading regime is dominant. Effect of duration and magnitude ofthe second phase on model evolution is also explored. Our so far obtained simulations were able to reproduce the westward obduction and certainextension processes along the active (European) margin, which match the existing ...
    ... 4.0 License. Numerical simulation of the Late Jurassic closure of the VardarTethys Nikola Stanković, Vesna Cvetkov, and Vladica Cvetković University of Belgrade, Faculty of Mining and Geology, Serbia (nikola.stankovic@rgf.rs) We report updated results of our ongoing research on constraining geodynamic ...
    ... zone and presumably subduction related Timok MagmaticComplex, both Late Cretaceous in age as well as Jurassic ophiolites obducted onto the Adriaticmargin. In our simulations we initiate an intraoceanic subduction in the Early/Middle Jurassic,which eventually transitions into an oceanic closure and subsequent ...