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Упит dcterms_subject_txt:Utilization and Storage

2426 items

  • Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders

    Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić (2023)
    ... Serbia “Department of Mineralogy, Crystallography, Petrology and Geochemistry, Faculty of Mining and Geology, University of Belgrade, Đušina 7, 11000 Belgrade, Serbia We studied the influence of Ag doping on the crystal structure and magnetic properties of CuO nanopowders. For the synthesis of ...
    ... morphological and magnetic properties in CuO nanopowders Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Influence of Ag doping on the morphological and magnetic ...
    ... Serbia For Publisher Dr Dragica Stanković Printing layout Dr. Jelena Maletaškić, Vladimir V. Srdić Press Faculty of Technology and Metalurgy, Research and Development Centre of Printing Technology, Karnegieva 4, Belgrade, Serbia Published: 2023 Circulation: 120 copies CIP – Karanorusanuuja ...

  • Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions

    Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)
    A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...
    Ceria, Yttrium, Solid solution, Mechanosynthesis, Oxygen vacancy, Nanocrystalline material

  • Clockwise rotation in the Serbian segment of the Vardar zone and in the Danubicum of Eastern Serbia - tetonic implication

    Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Tomić (2015)
    ... as a consequence of subduction-collision process. In the zone we studied the area which is 120 km long and maximum 45 km wide. From here 20 sites of Oligocene and Early Miocene igneous rocks and 6 localities of Late Cretaceous sediments were sampled. From the Carpatho-Balkanides, in the Danubic unit ...
    ... Late Jurassic and Early Cretaceous limestones were collected. The aim of our study was to find out if the studied areas were involved in large scale displacement during or after the time covered by the samples. The cores were oriented in situ using both geological and sun compass and subjected to ...
    ... the Vardar zone and in the Danubicum of Eastern Serbia - tetonic implication Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Tomić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Clockwise rotation in the Serbian segment of the Vardar zone and in the Danubicum ...

  • AR, CR and ARCR modeling for simulations and analyses of karst groundwater quality parameters

    Vesna Ristić-Vakanjac, Marina Ćokorilo-Ilić, Petar Papić, Dušan Polomčić, Radisav Golubović (2018)
    Although an invisible component of the hydrologic cycle, groundwater generally takes precedence over other water resources in the area of drinking water supply. Among groundwater resources, karst aquifers tend to be rich in sufficiently-accessible amounts of high-quality water. During most of the year, this water requires only disinfection prior to delivery to the end user. However, in many cases extreme rainfall and/or sudden snow melt results in transient turbidity, increase in bacterial count and temporary contamination (e.g. increase in ...
    autocorrelation, cross-correlation, autoregressive model, cross-regressive model, autocross regressive model, nitrates, Banja Spring, Serbia.

  • Mafic alkaline metasomatism in the lithosphere underneath East Serbia: Evidence from the study of xenoliths and the host alkali basalts

    Cvetković Vladica, Downes Hilary, Höck Volker, Prelević Dejan, Lazarov Marina (2010)
    Effects of mafic alkaline metasomatism have been investigated by a combined study of the East Serbian mantle xenoliths and their host alkaline rocks. Fertile xenoliths and tiny mineral assemblages found in depleted xenoliths have been investigated. Fertile lithologies are represented by clinopyroxene (cpx)-rich lherzolite and spinel (sp)-rich olivine websterite containing Ti–Al-rich Cr-augite, Fe-rich olivine, Fe–Al-rich orthopyroxene and Al-rich spinel. Depleted xenoliths, which are the predominant lithology in the suite of East Serbian xenoliths, are harzburgite, cpx-poor lherzolite and rare ...

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје
    ... knowledge of the critical parameters and exponents crucial for its further theoretical studies and possibly to practical investigations of the related phenomena. So far, both the equilibrium and nonequilibrium versions of the RFIM were intensively theoretically and numerically studied. Although the RFIM ...
    ... All neighbours of the flipped spins are checked for stability and those that are unstable are flipped in the next moment of discrete time t = 2. After that their neighbours are checked for stability and unstable ones are flipped at t = 3 and so on until all the spins are stable. Then the new avalanche ...
    ... size of both spanning and empty interfaces decreases the effective critical field down to H (i) c (R, L) for Rc < R < Reff c (L) and has no this effect at lower disorders. This, together with all foregoing findings, suggests the following recipe for singling out the Rc and Reff c (L) values: Reff ...

  • The Many Faces of SrpKor

    Duško Vitas, Ranka Stanković, Cvetana Krstev (2024.)
    Акроним СрпКор означава фамилију електронских корпуса савременог српског језика чија је изградња почела крајем седамдесетих година прошлога века, а која је постала шире видљива заинтересованој истраживачкој заједници објављивањем његове прве верзије на вебу 2002. године. У овом дугом периоду, посебно пре појаве корисних текстуелних ресурса на вебу, развој корпуса се састојао у прикупљању и обради грађе као и у развоју метода обраде корпуса. Наиме, електронски корпус није само колекција текстова у дигиталном облику (како се то, на пример, наводи ...
    СрпКор, корпуси, српски, лематизација, Лексимирка

  • Adsorption and Polymerization of Aniline on Cu(II)-Montmorillonite:  Vibrational Spectroscopy and ab Initio Calculation

    M. Ilić, E. Koglin, A. Pohlmeier, H. D. Narres, M. J. Schwuger (2000)
    Batch adsorption experiments in the presence of oxygen were performed to study the interlayer reactions of aniline on Cu(II)-montmorillonite in aqueous solutions. At concentrations below a critical value of CC ) 2.6 mmol dm-3 only a colored Cu(II)-aniline complex is formed, characterized by a stability constant of log(Kassoc/dm3 mol-1) ) 1.5. At concentrations beyond Cc aniline polymerizes yielding a dark brown product, which is identified by two vibrational spectroscopy techniques, attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and ...
    Анилин, адсорпција, полимеризација, Cu(II)-Монтморилонит, ФТИР, аб инитио прорачун

  • Assessment of spa mineral water quality from Vrnjačka Banja, Serbia: geochemical, bacteriological, and health risk aspects

    Nebojša Đ. Pantelić, Simona Jaćimović, Jana Štrbački, Danijela B. Milovanović, Biljana P. Dojčinović, Aleksandar Ž. Kostić (2019)
    The goal of this study is to evaluate the quality of seven natural mineral water sources in the Vrnjačka Banja area used in the treatment of various diseases. The 24 macro- and microelements were determined by inductively coupled plasma optical emission spectrometry (ICP-OES). The results show that element content was within allowed limits of concentration, except for B, As, and Se. The evaluated content of these elements can be associated with geological and anthropogenic factors. The sample S6 contains ...
    Management, Monitoring, Policy and Law, Pollution, General Environmental Science, General Medicine

  • Reconstruction of the Tethys' waning in the Balkans: New insights from Upper Cretaceous igneous formations and zircon provenance data

    Dejan Prelević, Kristijan Sokol, Ana Mladenović, Violeta Gajić, Vladica Cvetković (2024)
    geochronology, zircon, provenance
    ... Gondwana-related blocks and Europe, characterized by a system of pull-apart basins and transtensional tectonics. CRETACEOUS IGNEOUS FORMATIONS Upper Cretaceous igncous formations are found on both sides of the Sava-Vardar suture zone, in the Dinarides (Gondwana) and thc Serbian- Macedonian ...
    ... from both the Dinarides and Europe contain ubiquitous Neoproterozoic (Cadomian) and well-defined Silurian-Ordovician (+Devonian) populations. Carboniferous (Hercynian) zircons (>300 Ma) are predominant on the Europcan side, whereas they are considerably less intense and somewhat younger (+~300 ...
    ... differences in the provenance and age distributions. between the Dinarides . and European basement units, highlighting the distinct geological histories of these regions. The presence of Permotriassic zircons in thc Upper Cretaceous sediments of the Sava-Vardar Zone and thcir absence further cast ...

  • Human Hemoglobin and Antipsychotics Clozapine, Ziprasidone and Sertindole: Friends or Foes?

    Lena Platanić Arizanović, Nikola Gligorijević, Ilija Cvijetić, Aleksandar Mijatović, Maja Krstić Ristivojević, Simeon Minić, Aleksandra Nikolić Kokić, Čedo Miljević, Milan Nikolić (2023)
    Packed with hemoglobin, an essential protein for oxygen transport, human erythrocytes are a suitable model system for testing the pleiotropic effects of lipophilic drugs. Our study investi gated the interaction between antipsychotic drugs clozapine, ziprasidone, sertindole, and human hemoglobin under simulated physiological conditions. Analysis of protein fluorescence quenching at different temperatures and data obtained from the van’t Hoff diagram and molecular docking indicate that the interactions are static and that the tetrameric human hemoglobin has one binding site for ...
    Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Computer Science Applications, Spectroscopy, Molecular Biology, General Medicine, Catalysis

  • The number of unimodular roots of some reciprocal polynomials

    Dragan Stankov (2020)
    We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials
    ... the start and the end point of I j are not elements of its domain, has exactly one intersection point with Γ2. Thus the number U j of intersection points of Γ1 and Γ2 differs to the number V j of intersection points of Γ1 and the t-axis, t ∈ I j , by 0,1 or 2, because in the beginning and at the end ...
    ... < δ and δ> 0 was arbitrary, (7), (8) and (9) then show that ∫ g2(x, xm)dµK → ∫ g2(x1, x2)dµK 2 . Recalling (5), (6) and using the substitutions t = 2πθ, t1 = 2πθ1, t2 = 2πθ2 it follows that ∫ g2(x, xm)dµK = ∫1 0 g2(e2πiθ ,e2mπiθ)dθ = 1 2π ∫2π 0 g2(e i t ,emi t )dt = LC (W (x, xm)) and ∫ g2(x1 ...
    ... Qodutx2 — f Podux2 <6 and 6 > 0 was arbitrary, (7), (8) and (9) then show that [eux duc — | Boa wIee. Recalling (5), (6) and using the substitutions t = 276, t; = 270), t2 = 2702 it follows that 1 . . 1 20 . . / go(x,x™)dux = [ go(er™9 e2mmi9) dp — a go(el’ edt = LC(W(x, x”) and 2m 2a _— l fl . . ...

  • Punctuated, episodic magmatism and mineralization of the Rogozna skarn-hosted Au-Zn-Pb-Cu deposits revealed through high-precision U-Pb zircon geochronology

    Sean P. Gaynor, Milorad D. Antić, Vladica Cvetković, Kristina Šarić, Urs Schaltegger (2023)
    The subvolcanic regions of magmatic centers are commonly associated with alteration, mineralization, and economic ore deposits, however the duration and frequency of mineralizing pulses within the overall lifespan of these centers can be poorly defined. Therefore, models for the formation of mineral systems require more highprecision geochronology data to refine their evolutionary models. Rogozna Mountain and its eponymous magmatic complex, located in SW Serbia, hosts multiple base metal deposits associated with variable rock types and structural expressions and serves as a natural laboratory to ...
    Skarnovska mineralizacija, Magmatsko-hidrothermalni sistemi, Subvulcanske intruzije, geohronologija na cirkonima, CA-ID-TIMS

  • Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?

    Nikola Stanković, Taras Gerya, Vladica Cvetković, Vesna Cvetkov (2024)

  • Equilibrium and kinetic studies of the reactions between [Ru(terpy)(bipy)Cl]Cl complex and biologically important N-donor ligands

    Aleksandar Mijatović, Biljana Petrović, Ratomir Jelić, Živadin Bugarčić (2011)
    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, ...
    ... image1.png Equilibrium and kinetic studies of the reactions between [Ru(terpy)(bipy)Cl]* complex and biologically important N-donor ligands Aleksandar Mijatovié,** Biljana Petrovi¢,* Ratomir Jeli¢,® and Zivadin Bugar¢cic* “Faculty of Science, University of Kragujevac ...
    ... de, | guanosine-S’-monophosphate, thiourea and L-histidine. All reactions were studied by UV-VIS spectrophotometry in 0.1 M NaClO, with 10 mM NaCl. The excess of ligand concentration was used to observed pseudo-first order conditions. The rate constants and activation parameters are calculated using ...
    ... using computational program Origin 6.1. Also we investigated the hydrolysis and complexation reactions of Ru(II) complex with guanosine-5’-monophosphate and L- histidine. Potentiometric titrations were carried out at 298 K in inert atmosphere using a glass electrode. For the calculations is used computation ...

  • Waste rocks and medieval slag as sources of environmental pollution in the area of the Pb-Zn Mine Rudnik (Serbia)

    Alena Zdravković, Vladica Cvetković, Kristina Šarić, Aleksandar Pačevski, Aleksandra Rosić, Suzana Erić (2020)
    The new geochemical and mineralogical data of soil and water from the Pb-Zn Rudnik Mine area (central Serbia) reveal that the areas close to the mining sites and those located remotely from them are both affected by significant pollution by toxic elements, especially As, Pb, Ni and Cr. We, therefore, propose that two main sources are generally responsible for the current state of pollution in this area. The first is the material from waste rock dumps (WRDs) in which ...
    распадање сулфида, микроелементи, пиротин, загађење земљишта, Рударска активност, распадање шљаке

  • Long-term rockslope monitoring and rockfall prediction

    Miloš Marjanović, Biljana Abolmasov, Marko Pejić, Jelka Krušić (2021)
    ... traffic interruption; property damage; river damming and secondary floods and landslides. Dealing with rockfalls is a major topic for decision-makers and engineers, targeted at answering where and when will rockfalls occur and what preventive and remediation measures should be undertaken to neutralize ...
    ... monitoring and proved to be one of the most efficient and most robust approaches. It is based on change detection of point clouds, collected in sequences, annually or more frequently, depending on the slope’s dynamics. Each new point cloud can be compared against any of the previous, and all detectable ...
    ... 2024-12-25 10:42:36 Long-term rockslope monitoring and rockfall prediction Miloš Marjanović, Biljana Abolmasov, Marko Pejić, Jelka Krušić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Long-term rockslope monitoring and rockfall prediction | Miloš Marjanović, Biljana ...

  • Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta

    Aleksandar Pačevski (2022)
    ... enabled a further shift in the study of minerals and their textures to nanometer and even atomic levels, which certainly offers great opportunities, but at the mean time makes a research very complex. Scanning and Transmission Electron Microscopy (SEM and TEM) methods in combination with Electron Microprobe ...
    ... Mining and Geology, Belgrade, Serbia, E-mail: aleksandar.pacevski(ergf.bg.ac.rs Key words: texture, ore, microanalysis, pyrite The complete determination of a mineral composition and textural characteristics of the ores is crucial for correct interpretation of the ore-forming processes and genesis ...
    ... on a micrometer scale, and thus provide significantly more data important for investigating not only deposit genesis, but also possibilities and efficiency of their exploitation. With the development of polarized light microscopy as the basic methods of minerals, ores and rocks study, numerous textural ...

  • Projected changes in air temperature, precipitation and aridity in Serbia in the 21st century

    Boško Milovanović, Sebastian Schubert, Milan Radovanović, Vesna Ristić Vakanjac, Christoph Schneider (2021)
    У овој студији се испитују пројектоване промене средњих месечних и годишњих температура ваздуха, количине падавина и Де Мартоновог индекса аридности у Србији у 21. веку. У ту сврху статистички је моделована просторна дистрибуција температуре ваздуха и количине падавина на основу података 64 климатолошке станице и 421 падавинске станице за период 1976–2005 применом вишеструке линеарне регресије. Де Мартонов индекс аридности се израчунава из просторно распоређених података. Да бисмо добили регионалне просеке и варијабилност, Србију делимо на три поддомена: западну зону ...
    21 век, температуре ваздуха, климатске промене, Де Мартонеов индекс аридности, падавине, Србија

  • Synthesis, characterization, biomolecular interactions, molecular docking, and in vitro and in vivo anticancer activities of novel ruthenium(III) Schiff base complexes

    Milica Međedović, Aleksandar Mijatović, Rada Baošić, Dejan Lazić, Žiko Milanović, Zoran Marković, Jelena Milovanović, Dragana Arsenijević, Bojana Stojanović, Miloš Arsenijević, Marija Milovanović, Biljana Petrović, Ana Rilak Simović (2023)
    In order to discover new anticancer drugs, novel ruthenium(III) complexes [Ru(L)Cl(H2O)], where L is tetradentate Schiff base bis(acetylacetone)ethylendiimine (acacen, 1), bis(benzoylacetone)ethylendiimine (bzacen, 2), (acetylacetone)(benzoylaceton)ethylendiimine (acacbzacen, 3), bis(acetylacetone)propylendiimine (acacpn, 4), bis(benzoylacetone)propylendiimine (bzacpn, 5) or (acetylacetone)(benzoylaceton)propylendiimine (acacbzacpn, 6), were synthesized. The complexes 1 – 6 were characterized by elemental analysis, molar conductometry, and by various spectroscopic techniques, such as UV–Vis, IR, EPR, and ESI-MS. Based on in vitro DNA/BSA experiments, complexes 2 (bzacen) and 5 (bzacpn) with two aromatic rings showed ...
    Inorganic Chemistry, Biochemistry