Претрага

Упит dcterms_subject_txt:Atomic and Molecular Physics and Optics

2347 items

  • Comparative analysis of correlation coefficients in mineralogical and geophysical data from the mine tailing site “Rudnik” (Serbia)

    Vesna Cvetkov, Filip Arnaut, Dragana Životić (2024)

  • Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations

    Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović (2024)
    Monitoring Network, data, hydrogeological environment, tunnel, simulation

  • Утицај обртног магнетног поља на дерацемизацију кристала натријум-хлората

    М. Милојевић, А. Жекић, П. Дабић, Б. Вучетић, Б. Максимовић (2023)
    ... of Belgrade, Faculty of Physics, Studentski trg 12, 11000 Belgrade; ? University of Belgrade, Faculty of Mining and Geology, Đušina 7, 11000 Belgrade e-mail: andrijana(q)ff.bg.ac.rs Viedma ripening [1], application of ultrasonic waves [2], addition of impurities [3] and temperature changes [4] ...
    ... rotational frequency of the field affects the fraction of the obtained crystals. At frequencies of 800, and 1200 rpm, the amount of both enantiomers is approximately the same; at frequencies of 200, 400, and 1000 rpm, |. – orientation of crystals is dominant, while at 600 rpm, D – orientation of crystals ...
    ... слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade 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 ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... Synergistic role of bacterial urease and carbonic anhydrase in carbonate mineralization. Appl. Biochem. Biotechnol. 2014, 172, 2552–2561. [CrossRef] 14. Hammes, F.; Boon, N.; Clement, G.; de Villiers, J.; Siciliano, S.D.; Verstraete, W. Molecular, biochemical and ecological characteri- zation of a ...
    ... 22 µm) of supernatant was performed and the concentration of free calcium ions was analyzed by atomic absorption spectrophotometry (Spectra 220FS, Varian, Palo Alto, USA) with direct suction. 2.6. The Sixth Step: Characterization of Precipitates To characterize and compare the precipitates obtained in ...
    ... Mineralogy, Faculty of Mining and Geology, University of Belgrade, Ðušina 7, 11000 Belgrade, Serbia; sabina.kovac@rgf.bg.ac.rs 5 Department of Physics, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia; elvira.djurdjic@df.uns.ac.rs * Correspondence: oljasovl ...

  • Project REASONING: Characterization and technological procedures for recycling and reusing of the rudnik mine flotation tailings

    Vesna Cvetkov, Vladimir Simić, Stefan Petrović, Filip Arnaut, Milena Kostović, Dragan Radulović, Jovica Stojanović, Vladimir Jovanović, Dejan Todorović, Nina Nikolić, Jelena Senćanski, Grozdanka Bogdanović, Dragana Marilović (2024)

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... between trivalent and tetravalent metallic cerium and other f-elements: stability study of various lanthanide-and actinide-halides and- oxides. Journal of Physics and Chemistry of Solids, 39(5), p.467-484. #1 [41] Zych, A.K., 2011. Luminescence properties of Ce3+, Pr3+ and Nd3+ activated ...
    ... & Sons. [29] Schulten, H.R. and Leinweber, P., 2000. New insights into organic-mineral particles: composition, properties and models of molecular structure. Biology and Fertility of Soils, 30, p.399-432. [30] Nash, K.L., 1993. A review of the basic chemistry and recent developments in trivalent ...
    ... at communication wavelengths for integrated optics applications. SN Applied Sciences, 5(1), p.39. [141] Ayoub, 1., Sehgal, R., Sharma, V., Sehgal, R., Swart, H.C. and Kumar, V., 2023. Rare-Earth-Doped Ternary Oxide Materials for Down-Conversion and Upconversion. In Advanced Materials for Solid ...

  • Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog

    Maja D. Milošević (2016-12-09)
    Adsorpciona efikasnost različitih uzoraka glina sa lokaliteta Srbije određenaje njihovim tretiranjem različitim koncentracijama rastvora metilen plavog (MP).Detaljna mineraloška karakterizacija ispitivanih glina i rezultati njihove interakcijesa rastvorima MP dobijeni su primenom optičkih, rendgenskih, hemijskih, DTA ispektroskopskih metoda.Na osnovu formiranja MP agregata u izmenljivim pozicijama i površiničestica gline, razlikuju se dva tipa glinovitih minerala: visoko naelektrisani(smektiti) i nisko naelektrisani (kaoliniti). Dimeri se stvaraju na naelektrisanimpovršinama, a granica njihovog razvoja omogućuje determinaciju mineralne vrste.Molekuli MP stoje pod uglom od 21.5o kada se ...
    minerali glina, metilen plavo, kristali metilen plavog, difuznarefleksija, adsorpcija, flokulacija, naelektrisanje slojeva
    ... Physicochemical and Engineering Aspects 73: 65 - 76 Bradley D.F. and Wolf M.K. 1959. Aggregation of dyes bound to polyanions. Proc. Natl. Acad. Sci., U.S.A. 45: 944 - 952 Brady P.V., Cygan R.T. and Nagy K.L. 1996. Molecular controls on kaolinite surface charge. Journal of Colloid and Interface Science ...
    ... 42 Nakato T., Iwata Y., Kuroda K. and Kato C. 1992. Preparation of an intercalation compound of layered titanic acid H2Ti4O9 with methylene blue. Journal of Inclusion Phenomena and Molecular Recognition in Chemistry 13: 249 - 256 Neumann M.G., Schmitt C.C. and Gessner F. 1996. Time-dependent ...
    ... spectroscopy study. Journal of Chemical Physics 104 (19): 7749 - 7757 119 Hang P.T. and Brindley G.W. 1970. Methylene blue absorption by clay minerals: determination of surface areas and cation exchange capacities (clay-organic studies XVIII). Clays and Clay Minerals. 18: 203 - 212 Higgins ...

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography

  • Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera

    Aleksandra B. Kolarski (2016-08-25)
    Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...
    prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave
    ... page 3465. Rakov, V. A., Uman, M. A. (2003). Lightning: physics and effects. Cambridge University Press., page 687. Rycroft, M. J. (2003). The Earth and its atmosphere. In Davies, M., editor, The standard handbook for aeronautical and astronautical engineers, pp. 16.1-16.12. McGraw-Hill. ...
    ... in the earth-ionosphere waveguide. IEEE Transactions on Antennas and Propagation, 48(9), pp. 1420–1429. Cummer, S. A. (2003). Current moment in sprite-producing lightning. Journal of Atmospheric and Solar-Terrestrial Physics, 65, pp. 499–508. Cummer S. A., Briggs M. S., Dwyer J. R., Xiong S ...
    ... Adams, C. D. D., Brundell, J. B., Dowden, P. E. (1994). Rapid onset, rapid decay (RORD), phase and amplitude perturbations of VLF subionospheric transmissions. Journal of Atmospheric and Terrestrial Physics, 56(11), pp. 1513-1527. Dwyer, J. R. (2004). Implications of X-ray emission from lightning. ...

  • 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
    ... Vitrinite re�ectance as maturity pa- rameter – petrographic and molecular characterization and its application to basin modeling. In: Mukhopadhyay, P. K. & Dow, W. G. (eds), Vitrinite Re�ectance as Maturity Parameter – Applications and Limitations. American Chemical Society, Washington, DC, pp. ...
    ... generation as a function of the molecular structure of kero- gen as revealed by pyrolysis-gas chromatography. Organic Geochemistry, 22: 543–574. Teichmüller, M. & Durand, B., 1983. Fluorescence microscopi- cal rank studies on liptinites and vitrinites in peat and coals, and comparison with results of ...
    ... Vitrinite reflectance as maturity pa- rameter — petrographic and molecular characterization and its application to basin modeling. In: Mukhopadhyay, P. K. & Dow, W. G. (eds), Vitrinite Reflectance as Maturity Parameter - Applications and Limitations. American Chemical Society, Washington, DC, pp. 1-24 ...

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... plastic waste material and biomass plastic fuel were proposed [40,41]. Less attention was given to detailed characterization of all three (solid, gas, and liquid) products obtained by co-pyrolysis of coal/plastic blends. This is particularly related to investigation of the molecular composition of liquid ...
    ... long-chain homo- logues and proportionally lower amount of mid n-alkanes. The mentioned data indicate that, at 450 ◦C, the interaction between lignite and HDPE resulted in more intense release of long-chain homologues. This is consistent with the observation that lower molecular weight units of the normal ...
    ... Org. Geochem. 1994, 21, 619–627. [CrossRef] 70. Huang, Y.; Lockheart, M.J.; Collister, J.W.; Eglinton, G. Molecular and isotopic biogeochemistry of the Miocene Clarkia For-mation: Hydrocarbons and alcohols. Org. Geochem. 1995, 23, 785–801. [CrossRef] 71. Rieley, G.; Collister, J.W.; Stern, B.; Eglinton ...

  • Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)

    Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović (2014)
    Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization and activation of precursors. During the highpressure and high-temperature synthesis (HPS) process at 4 GPa and 1,200 °C, sphene undergoes into phase transition, from room-temperature phase P21/a to high-temperature phase A2/a. Evidence of that structural phase transition is given in this paper using infrared, Raman spectroscopy and X-ray powder diffraction. Rietveld refinement was employed to get the ...
    Sphene, Phase transition, Raman spectroscopy, X-ray diffraction, SEM, IR

  • Characterization of bituminite in Kimmeridge Clay by confocal laser scanning and atomic force microscopy

    Paul C. Hackley, Jolanta Kus, João Graciano Mendonça Filho, Andrew D. Czaja, Angeles G. Borrego, Dragana Životić, Brett J. Valentine, Javin J. Hatcheries (2022)
    This work investigates bituminite (amorphous sedimentary organic matter) in Upper Jurassic Kimmeridge Clay source rock via confocal laser scanning microscopy (CLSM) and atomic force microscopy (AFM). These petrographic tools were used to provide better understanding of the nature of bituminite, which has been historically difficult to identify and differentiate from similar organic matter types in source rocks. As part of an International Committee for Coal and Organic Petrology (ICCP) working group, an immature (0.42% vitrinite reflectance), organic-rich (44.1 wt% ...
    Битуминит, Kонфокална ласерска скенирајућа микроскопија, Mикроскопија атомских сила, Органска петрологија, Термичка зрелост

  • Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu

    Nikoleta Aleksić (2021)
    ... bonding based on ETS- NOCV method, Chemical Physics Letters, 661(16), 136–142. [9] Ostojić, B., Stanković, B., Đorđević, D. (2014) Theoretical study of the molecular properties of dimethylanthracenes as properties for the prediction of theirs biodegradation and mutagenicity, Chemosphere, 111, 144-150. ...
    ... Thermography for Condition Monitoring - A Review. Infrared Physics and Technology. 60, pp. 35–55. [3] Doshvarpassanda, S., Wub, C., Wangb, C. (2019). An overview of corrosion defect characterization using active infrared thermography. Infrared Physics and Technology. 96, 366– 389. [4] Tomić, Lj., Damnjanović ...
    ... Gorb, L., Luzanov, A.V., Elstner, M., Suhai, S., Leszczynski, J. (2003) Structure and conformational flexibility of uracil: A comprehensive study of performance of the MP2, B3LYP and SCC-DFTB methods, Journal of Molecular Structure, 625(1-3), 295-303. [3] Stanković, B. Ostojić, B., Popović, A., Gruden ...

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura

  • Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)

    Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)
    The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...
    Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD
    ... are characterised by complex mineral intergrowths and textures (Rudnik). Due to their almost ideal stoichiom- etry, arsenopyrite samples from Drenjak were further analysed by transmission electron microscopy, Which allows atomic-scale imaging and electron diffraction obtained from the same location ...
    ... analyses, and Supplementary Information File S2: TEM-EDS analysis of the oxidised and reference arsenopyrite sample (Figuure S1). Author Contributions: Conceptualisation, LJ., A.P. and J.Z.; methodology, J.Z. and AŠ. (Andreja Šestan); software, A.Š. (Aleš Šoster); validation, LJ., A.P., A.K. and J.Z ...
    ... A.K., AŠ. (Andreja Šestan) and J.Z.; investigation, LJ.; resources, A.P.; data curation, LjJ. and J.Z.; writingz— original draft preparation, 1.J., A.P., A.K., AŠ. (Andreja Šestan), and A.Š. (Aleš Šoster); writing— review and editing, LJ., A.P., AŠ. (Aleš Šoster) and J.Z.; visualisation, J.Z.; ...

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... (Fig. 1) and enabled us to understand the mechanisms and causes of climate changes. This is definitely one of the most important scientific the- ories in the climate science. The influence of his work is not just related to climatology but also to applied mathematics, physics, astronomy, and geo - logy ...
    ... Milanković’s work was noticed by meteorologist and astronomist interested in geo- physics, Alfred Wegener, and climatologist vladimir Petrovič Köppen. Köppen impressed by calculation of secular thermal change, invited Milanković to con- sider the periods of 130 ky and 600 ky to his calcula- tions. During his ...
    ... n rates spatially and temporary varies and depend on palaeoecological and palaeogeographic conditions. Generally, well-rounded and fine-grained sediments reflect calm and slow sed- imentation, while angular coarse-grai ned sediments are mostly related to short palaeotransport and fast sedimentation ...

  • Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević (2019)
    Изингов модел, критично понашање, танки системи

  • 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