Претрага
2354 items
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Threshold-induced correlations in the Random Field Ising Model
... Centre of Excellence, Department of Applied Physics, Aalto University, P.O. Box 11100, 00076, Aalto, Espoo, Finland. 3Helsinki Institute of Physics, Department of Applied Physics, Aalto University, P.O. Box 11100, 00076, Aalto, Espoo, Finland. Correspondence and requests for materials should be addressed ...
... Centre of Excellence, Department of Applied Physics, Aalto University, P.O. Box 11100, 00076, Aalto, Espoo, Finland. *Helsinki Institute of Physics, Department of Applied Physics, Aalto University, P.O. Box 11100, 00076, Aalto, Espoo, Finland. Correspondence and requests for materials should be addressed ...
... this obstacle is to impose some threshold, and subsequently analyze only the portion of signal above it. Compared to noise �ltering as its alternative, the thresholding could be a preferred choice when the response signal is random. 1Faculty of Physics, University of Belgrade, POB 368, 11001, Belgrade ...Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević. "Threshold-induced correlations in the Random Field Ising Model" in Scientific Reports, Springer Science and Business Media LLC (2018). https://doi.org/10.1038/s41598-018-20759-6
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Утицај обртног магнетног поља на дерацемизацију кристала натријум-хлората
... 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 ...М. Милојевић, А. Жекић, П. Дабић, Б. Вучетић, Б. Максимовић. "Утицај обртног магнетног поља на дерацемизацију кристала натријум-хлората" in XXVII конференција Српског кристалографског друштва, Чачак, 14-15. јун, 2023., Београд : Српско кристалографско друштво (2023)
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Comparative analysis of correlation coefficients in mineralogical and geophysical data from the mine tailing site “Rudnik” (Serbia)
Vesna Cvetkov, Filip Arnaut, Dragana Životić. "Comparative analysis of correlation coefficients in mineralogical and geophysical data from the mine tailing site “Rudnik” (Serbia)" in 5th Congress Geologists of the Republic of North Macedonia, Ohrid, 28-29. 10. 2024, Македонско геолошко друштво (2024)
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Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations
Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović. "Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations" in International Scientific Conference - Sinteza 2024, Belgrade, 16. maj 2024, Singidunum University (2024). https://doi.org/10.15308/Sinteza-2024-288-294
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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 ...Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov. "Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils" in Microorganisms, MDPI AG (2021). https://doi.org/10.3390/microorganisms9081691
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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)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. "Project REASONING: Characterization and technological procedures for recycling and reusing of the rudnik mine flotation tailings" in 5th Congress Geologists of the Republic of North Macedonia, Ohrid, 28-29. 10. 2024, Македонско геолошко друштво (2024)
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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 ...Maja D. Milošević. "Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-12-09)
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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 ...Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović. "Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae" in Organic Geochemistry, Elsevier BV (2019). https://doi.org/10.1016/j.orggeochem.2019.01.001
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Influence of Coupling Delay on Noise Induced Coherent Oscillations in Excitable Systems
Burić Nikola, Grozdanović Ines, Todorović Kristina, Vasović Nebojša. "Influence of Coupling Delay on Noise Induced Coherent Oscillations in Excitable Systems" in Journal of Statistical Physics 145 no. 1, Berlin:Springer (2011): 175-186
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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)Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević. "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" in Marine and Petroleum Geology, Elsevier BV (2020). https://doi.org/10.1016/j.marpetgeo.2020.104252
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Mogućnost infracrvene termografije pri detekciji štetnih gasova
Curenje pojedinih gasova je opasnost koja može da izazove velike nezgode. Često je praćeno požarima i eksplozijama koji za posledicu mogu da imaju kako ljudske povrede, tako i štetan uticaj na ekologiju i ekonomiju. Da bi se izbegle takve situacije, preventivna inspekcija je od presudne važnosti. Curenje većine gasova se ne može uočiti golim okom a za otkrivanje i procenu stepena curenja može se koristiti tehnologija toplotnog snimanja (infracrvena termografija). U datom radu predstavljene su mogućnosti i ograničenja primene ...Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Mogućnost infracrvene termografije pri detekciji štetnih gasova" in VIII Memorijalni naučni skup iz zaštite životne sredine "Docent dr Milena Dalmacija", Novi Sad, 01-02. april 2021., Prirodno-matematički fakultet (2021)
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Synchronization of the minimal models of bursting neurons coupled by delayed chemical or electrical synapses
Vasović Nebojša, Burić Nikola, Todorović Kristina, Grozdanović Ines. "Synchronization of the minimal models of bursting neurons coupled by delayed chemical or electrical synapses" in Chinese Physics B 21 no. 1, Bristol:IOP Publishing on behalf of the Chinese Physical Society (2012): 010203-1-010203-8
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Geochemical Determination of the Solar pp-Neutrino Flux with LOREX: A Progress Report.
Miodrag K. Pavićević, Walter F. Henning, Fritz Bosch, T. Uesaka, Yurij A. Litvinov, T. Kubo, Vladan Pejović, Georg Amthauer, Ivan Aničin, Blažo Boev, Vladica Cvetković (2017)Miodrag K. Pavićević, Walter F. Henning, Fritz Bosch, T. Uesaka, Yurij A. Litvinov, T. Kubo, Vladan Pejović, Georg Amthauer, Ivan Aničin, Blažo Boev, Vladica Cvetković. "Geochemical Determination of the Solar pp-Neutrino Flux with LOREX: A Progress Report." in IOP Conf. Series: Journal of Physics: Conf. Series 01-Apr no. 888 (2017). https://doi.org/10.1088/1742-6596/888/1/012192
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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. ...Aleksandra B. Kolarski. "Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-08-25)
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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 ...... 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 ...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
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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)... 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 ...Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović. "Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal" in Polymers, MDPI AG (2021). https://doi.org/10.3390/polym13050759
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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 зрелостPaul C. Hackley, Jolanta Kus, João Graciano Mendonça Filho, Andrew D. Czaja, Angeles G. Borrego, Dragana Životić, Brett J. Valentine, Javin J. Hatcheries. "Characterization of bituminite in Kimmeridge Clay by confocal laser scanning and atomic force microscopy" in International Journal of Coal Geology, Elsevier BV (2022). https://doi.org/10.1016/j.coal.2022.103927
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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 ...Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović. "Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)" in Physics and Chemistry of Minerals, Springer Science and Business Media LLC (2014). https://doi.org/10.1007/s00269-014-0693-x
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Polymorphism and photoluminescence properties of K3ErSi2O7
alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna strukturaPredrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović. "Polymorphism and photoluminescence properties of K3ErSi2O7" in Acta Crystallographica Section C Structural Chemistry, International Union of Crystallography (IUCr) (2019). https://doi.org/10.1107/S2053229619011926
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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.; ...Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik. "Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)" in Crystals, MDPI AG (2023). https://doi.org/10.3390/cryst13020278