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Упит dcterms_creator_txt:Saša Krstić

224 items

  • Size–strain line-broadening analysis of anatase/brookite (TiO<sub>2</sub>)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis

    Aleksandar Kremenović, Mirjana Grujić-Brojčin, Nataša Tomić, Vladimir Lazović, Danica Bajuk-Bogdanović, Jugoslav Krstić, Maja Šćepanović (2022)
    A size-strain line-broadening analysis of the XRPD patterns and Raman spectra for two anatase/brookite (TiO2)-based nanocomposites with carbon (C) was carried out and the results compared with those of a similar sample free of carbon. The crystal structures and microstructures of anatase and brookite, as well as their relative abundance ratio, have been refined from XRPD data by the Rietveld method (the low amount of carbon is neglected). The XRPD size-strain analysis resulted in reliable structure and microstructure results ...
    Materials Chemistry, Metals and Alloys, Atomic and Molecular Physics, Optics, Electronic, Optical and Magnetic Materials

  • 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)
    ... 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 properties in CuO nanopowders | Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir ...

  • Uniaxial compressive strength test before and after standard fire test on rock mass

    Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)
    ... before and after standard fire test on rock mass Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду ...
    ... before and after standard fire test on rock mass | Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović | Fifth symposium of the Macedonian Association for Geotechnics, Ohrid, North ...

  • Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić (2019)
    Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...
    мио-плиоценска геодинамика, јужни Панонски басен, Авалски и Торлак хорст, Белопоточки трог, Србија
    ... Cyprideis kollmanni KRSTIĆ, C. cf. heterostigma (REUSS), Hemicytheria cf. folliculosa (REUSS), H. ampullata (MEHES), Candona (Propontoniella) candeo KRSTIĆ, Amplocypris cf. firmus KRSTIĆ, A. cf. recta (REUSS), A. perphoratus KRSTIĆ, Herpetocyprella auriculata (REUSS), Cypria siboviki KRSTIĆ, Loxoconcha ...
    ... porosa (MEHES), L. cf. rhombovalis POKORNY, Candona (Thaminocypris) improbus KRSTIĆ, Candona (Typhlocypris) lunata (MEHES), C. (T.) trigonella HEJJAS, Leptocythere(Amnicythere) miscere KRSTIĆ, L. (A) cf. servica KRSTIĆ, Loxocorniculina hodonica POKORNY, Xestolebris sp. 4.1.5. Late Miocene, Upper ...
    ... G eo lo g ia C ro a ti ca Geologia Croatica 72/2118 Camptocypria zalanyi KRSTIĆ, Camptocypria flectimarginata SOKAČ, Amplocypris bacevicae KRSTIĆ, Cypria tocorjescui HANGANU, Loxoconcha cumsacui KRSTIĆ, L. schweyeri SUZIN, Thaminocypris sp., Camptocypria sp., Serbiella sp., Pontoniella ...

  • Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel (2016)
    General Earth and Planetary Sciences
    ... west-vergent thrust juxtaposing the Vlasina Unit over the Lower Complex (Vukanović et al. 1973; Krstić and Kara- mata 1992), or, alternatively, as a post-Late Cretaceous dextral shear zone (Kržutner and Krstić 2002). Addition- ally, several reports suggest that these units originally had a stratigraphic ...
    ... strike-slip fault (Malešević et al. 1980; Vukanović et al. 1982), an east-vergent thrust (Krstić and Karamata 1992), or a westward thrust reacti- vated as dextral strike slip in the Neogene (Kršutner and Krstić 2002). It has been recently interpreted as a ductile shear zone (Stefan M. Schmid, personal ...
    ... al. 1973), along which the Vlasina Unit has been thrust onto the Lower Complex (Dimitrijević 1963; Vukanović et al. 1973; Krstić and Karamata 1992: Kriutner and Krstić 2002). Our studies in the area suggest the existence of a major ductile east-dipping shear zone with top-to-the-east to south-east ...

  • Tektono-termalna evolucija kontakta Dinarida i Karpato-Balkanida u području Jastrepca

    Dalibor Erak (2019)
    Predmet istraživanja doktorske disertacije je tektonska evolucija područja planine Jastrebac u centralnoj Srbiji, gde višefazna tektonska aktivnost od mezozoika do danas komplikuje rekonstrukciju strukturnih odnosa i geološke evolucije ovog prostora. Kompleksna višefazna evolucija planine Jastrebac u Srbiji je demonstrirana kombinovanjem kinematskih podataka prikupljenih na terenu i mikrostrukturnih opservacija sa dodatnim termohronološkim podacima “fission track” i podacima odredbe starosti metodom U-Pb na cirkonima. Gornjokredna ekshumacija bila je praćena gornjokredno-eocenskim navlačenjem i magmatizmom vezanim za kontinentalnu koliziju, pri čemu je akreciona ...
    kinematika, termohronologija, ekstenzioni detačmenti, Dinaridi, Karpato-Balkanidi
    ... korišćeno za detaljniju podelu jedinica, iako je njihov prelaz postepen (Rakić et al., 1976; Krstić et al., 1980). Metamorfisani krečnjaci sadrže mezozojsku ili rano tercijarnu deformisanu faunu (Krstić et al., 1980). Tektonski afiniteti i starost protolita stena Boljevačko-vukanjske subjedinice ...
    ... 479-486. Karamata, S., Krstić, B., Dimitrijević, M. D., Knežević, V., Dimitrijević, M. N., Filipović, I., 1994. Terranes between the Adriatic and the Carpatho Balkan arc. Bull. T. CVIII Serb. Acad. Sci. Arts, CI. Sci. math. Nat., Belgrade, Sci. nat., 47-68. Karamata, S., Krstić, B., 1996. Terranes ...
    ... softveru ArcGis. Na osnovu podataka iz tumača i karata OGK Jugoslavije za listove Kruševac (Rakić et al., 1976), Niš (Rakić et al., 1973), Aleksinac (Krstić et al., 1980) i Kuršumlija (Malešević et al., 1980) konstruisana je Kompilaciona digitalizovana D. Erak: Tektono-termalna evolucija kontakta ...

  • Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)
    General Earth and Planetary Sciences

  • Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage

    Maja Milošević, Biljana Đorđević, Alena Zdravković (2021)
    ... of microcrystalline carbonate which is intimately mixed with clay of the illite type with a very smaller amount of detrital quartz and feldspar (Krstić et al., 1980). In the analysis of the thin sections made of the sample, the basic mass is observed, which represents a sintered fine-grained aggregate ...
    ... investigated. References Djordjević, B. 2021. Ražanjsko crepuljarstvo. Izrada crepulja u Rujištu kod Ražnja. Ražanj 2021, Beograd. (in print) Krstić, B., M. Veselinović, M. Divljan, M. Rakić. 1980. Osnovna geološka karta 1:100000. Tumač za list Aleksinac K 34-20. Savezni geološki zavod, Beograd ...

  • Konceptualni model hidrogeotermalnog sistema šire okoline Brusa - geološki, geofizički i hidrogeološki uslovi / Conceptual model of hydrothermal system of Brus area - geological, geophysical and hydrogeological condition

    Dejan Milenić, Ana Vranješ, Marinko Toljić, Ivana Vasiljević, Natalija Radosavljević, Matija Ognjanović (2024)
    Na širem području Brusa izvedena su naučna multidisciplinarna istraživanja za potrebe ocene geotermalnog potencijala sa zadatkom de9inisanja uslova formiranja geotermalnih i termomineralnih resursa. Interpretacijom podataka zaključeno je da je na predmetnom terenu formiran "hibridni" hidrogeotermalni sistem, koji sadrži elemente sistema u rov-strukturi i elemente konvektivnog hidrogeotermalnog sistema sa rezervoarom u pokrivaču granitoidne intruzije. Sistem čine dva nezavisna hidrogeotermalna rezervoara. Prvi rezervoar formiran je u gornjokrednim krečnjacima na dubini od oko 1550 m. Maksimalne prognozne temperature hidrogeotermalnih resursa u krečnjačkom ...
    hidrogeotermalni sistem, gornjokredni krečnjaci, trijaski mermeri, Brus

  • Hydrogeochemistry of Uranium in the Groundwaters of Serbia

    Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić (2015)

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... 513–531. Kräutner H.G. & Krstić B. 2002: Alpine and Pre-Alpine structural units within Southern Carpathians and the Eastern Balkanides. In: Proceedings of XVII Congress of Carpathian–Balkan Geo- logical Association. Geologica Carpathica 53 (Special Issue). Kräutner H.G. & Krstić B. 2003: Geological Map ...
    ... 1970). The metamorphic core of the mountains belongs to the Ser- bo-Macedonian and Supragetic Unit of the Dacia tectonic Mega-Unit (Kräutner & Krstić 2002, 2003) and thus repre- sents a key area where the contact between these two units can be studied at the surface in their northern segments. However ...
    ... upper- most nappe of the Dacia Mega-Unit nappe system, predomi- nantly comprised of low-grade greenschist facies metamorphic rocks (Fig. 1b, Kräutner & Krstić 2002; Iancu et al. 2005a; Schmid et al. 2008). According to the existing studies, both the Serbo-Macedo- nian and Supragetic Unit originate from ...

  • Badenske školjke jugoistočnog oboda Panonskkog basena (Centralni Paratetis)

    Gordana M. Jovanović (2014-12-05)
    Rad obuhvata detaljnu studiju badenskih školjaka koje potiču sa terenajugoistočnog oboda Panonskog basena (Centralni Paratetis). Proučavani su lokaliteti naprostorima Srbije (Fruška gora, Golubac, okolina Beograda, Aranđelovca, Koceljeva,Loznica) i severoistočne Bosne (Ugljevik). Pored taksonomske analize i paleontološkihopisa bivalvija, u radu je dat i spisak revidovanih vrsta koje su do sada pronađene usedimentima badenskog kata istraživanog terena. Do sada je ukupno poznato 41familija, 108 rodova i 174 taksona. Identifikovano je 170 bivalvijskih vrsta, međukojima su neke prvi put konstatovane na ovim ...
    školjke, baden, Panonski basen (Centralni Paratetis), stratigrafija,paleoekologija, paleogeografija, paleobiogeografija
    ... 79. Krstić, N. 1978. Ostrakodi u miocenu Beogradskog dunavskog ključa. Zbornik radova 9. kongresa geologa Jugoslavije, 117-125, Sarajevo. Krstić, N., Savić, Lj., Jovanović ,G., Boldor, E. 2003. Lower Miocene lakes of the Balkan Land. Acta Geologica Hungarica, 46, 3, 291-299. Krstić, N., Savić ...
    ... Sarajevo, str. 46. 6. Krstić, N., Krstić, B., Savić, Lj. Jovanović, G.: Ostracodes and palaeolimnology on examples of Balkan Penisnula. - 15th International Symposium of ostracoda, 12-15 septembre, pp. 17, 2005, Berlin. 7. Jovanović, G., Krstić, N., Kovalenko V., Prysjazhnjuk V.: ...
    ... najjužniji deo Panonske nizije (Krstić i dr., 2003, 2012). Morski baden u Srbiji počinje donjim delom, a konstatovan je bušenjem severno od Dunava, u južnom Banatu, gde su nađeni brojni planktonski foraminiferi zone Praeorbulina-Orbulina suturalis Brőnnimann, prema Krstić i dr., (2012). U Ostrovu, ...

  • The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>

    Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić (2008)
    The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...
    Пепсин, алуминијум, кинетика, активација, електрофоретска мобилност
    ... Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The influence of Al3+ion on porcine pepsin activityin vitro | Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić | Journal of Enzyme ...

  • Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom

    Saša D. Bošković (2016-09-09)
    Otkopavanje materijala rotornim bagerom je veoma sloţen fiziĉko-mehaniĉki proces. Pokazatelji efektivnosti tog procesa zavise od velikog broja raznovrsnih ĉinilaca od kojih se posebno mogu istaći: fiziĉko-mehaniĉke karakteristike materijala koji se otkopava, reţim rada bagera i izbor tehnoloških parametara bloka, odreska i reza, geometrije vedrica i zuba itd. Poseban problem se javlja kod otkopavanja materijala povećane ĉvrstoće, što je ĉest sluĉaj na našim površinskim kopovima. Dimenzionisanje specifiĉne sile kopanja bagera prema manjim masama izuzetno ĉvrstog materijala je neracionalno i rešenje ...
    rotorni bager, parametri reza, otpor na kopanje, dinamika bagera, kapacitet, optimizacija, specifična potrošnja energije
    ... Vuković B., Krstić V. (2001), Primjena modela simulacije pri izboru optimalnih tehnoloških rešenja selektivnog otkopavanja na primjeru površinskog kopa Gračanica - Gacko, Savetovanje Raĉunarski integrisane tehnologije u industriji minerala, Prijedor [10] Bošković S., Vuković B., Krstić V. (2005) ...
    ... otkopavanju materijala sa povećanom čvrstoćom;Optimization of bucket wheel excavator cutting parameters at mining of materials with increased strength Saša D. Bošković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Optimizacija parametara reza rotornog bagera ...
    ... otkopavanju materijala sa povećanom čvrstoćom;Optimization of bucket wheel excavator cutting parameters at mining of materials with increased strength | Saša D. Bošković | Универзитет у Београду | 2016-09-09 | | http://dr.rgf.bg.ac.rs/s/repo/item/0004054 Дигитални репозиторијум Рударско-геолошког факултета ...

  • Smanjenje sleganja plitkih temelja primenom mikrošipova

    Slobodan Ćorić, Dragoslav Rakić (2021)
    Mikrošipovi su šipovi malog prečnika koji se grade tako što se u tlu specijalni postupkom formira bušotina koja se zatim armira i injektira. Njihov prečnik je najčešće 150 – 300 mm, a dužina može da bude i više desetina metara. Mikrošipovi mogu da se grade u svim vrstama tla i mogu da budu vertikalni i kosi. Oni se, stoga, koriste kao zamena za konvencionalne šipove i ankere. Primena mikrošipova u fundiranju predstavlja jedan savremeni način izgradnje i sanacije temelja/objekata. ...
    mikrošipovi, sleganje plitkih temelja i mikrošipova, krutost tla i mikrošipova

  • 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 drugs

  • Synthesis and characterization of nanostructured Ca0.9Er0.1MnO3

    Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)
    ... Radetić Branka Petković Ljiljana Pojinović Ješić Igor Opsenica Milan PFraneš Biljana Šmit Sanja Panić Jovana Francuz Jvan Ristić Milena Krstić Pesna Despotović Dragana Tomašević Pilipović Marija Nikolić Branislav Šojić Tamara Premović Zorica Stojanović Bojana Srećo Zelenović Ksenija ...

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... ean Region. Geological Society, London, Special Publications, vol. 260, pp 155178 Karamata S, Krstić B (1996) Terranes of the Eastern Serbia Carpatho- Balkanides. In: Knežević-Djordjević V, Krstić B (eds) Terranes of Serbia. Univerzitet u Beogradu, Beograd, Rudarsko-geološki fakultet, pp 2540 ...
    ... Valjevo (Fig. 1). The area is part of the northern rim of the Maljen ophiolitic massif, located in the Western Belt of the Vardar Zone (Karamata and Krstić 1996; Karamata 2006). The wide territory is characterized by a complex morphology and is distinguished by two areas: the plain of the tertiary ...
    ... tektoniku terena izmedju Priboja i Senice. XII Kongres Geologa Jugoslavije (in Serbian) Antonijević I, Veselinović M, Djordjević M, Kalenić M, Krstić B, Karajičić LJ (1970) Tumač za list Žagubica (OGK SFRJ 1:100 000). Savezni Geološki Zavod SFRJ, Beograd (in Serbian) 11 Bilbija N, Matović ...

  • Geologija severnog dela Resavsko-Moravskog ugljenog basena

    Saša Ranković (1990)
    Ugljeni basen, Resavsko-Moravska oblast

  • Biostratigrafija i paleogeografske karakteristike neogena istočnog dela Kolubarskog basena

    Saša Mitrović (1992)
    Biostratigrafija, paleogeografske karakteristike, neogen, Kolubara