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Упит dcterms_subject_txt:Otoliti in situ

1960 items

  • P-T analiza RMU Bitola – krupne klase

    Nemanja Dobrosavljević (2024)
    Cilj ovog diplomskog rada je bio ispitivanje mogućnosti i tehnologije čišćenjauglja, kao i predstaviti rezultate pliva – tone analize koja ima za cilj ocenu mogućnosti čišćenja uglja - krupnih klasa posmatranog uzorka. Da bi se ispitivanje i analiza mogućnosti čišćenja rovnog uglja u REK Bitola uspešno priveli kraju, moralo se uraditi uzorkovanje reprezentativnog uzorka iz koga se potom izdvaja prvi deo koji služi za određivanje sadržaja vlage. Pored tog dela iz uzorka se izdvaja i drugi njegov deo koji će ...
    ugalj, lignit, Bitola, PT analiza, pliva-tone analiza, čišćenje uglja, suvi ugalj, vlažan ugalj, pepeo, donja toplotna moć, čist ugalj, jalovina, bilans
    ... lučna sita sa otvorima od 0,5 mm. Odsev lučnih sita ide na dalje otkapavanje na vibro sitima a prosev se vraća nazad u bubanj kao suspenzija. ROVNI UGALJ -100+0 mm BUBANJ SA AUTOGENOM SUSPENZIJOM NAT) ČUJAL) | VIBRO SITO VIBRO SITO {a = 10 mm) {a = 5mm}) == = (-) - (* J VIBRO SITO HIDROCIKLON ...
    ... obavlja čišćenje uglja u autogenoj suspenziji. Potom na vibro sita (otvor prečnika 5 mm) iz bubnja izlaze lake frakcije (zajedno sa suspenzijom). Sito (poz. 7) za prosejavanje može biti projektovano i kao ”tromel” varijanta sita i to sito se može integrisati kao sastavni deo bubnja. Sa druge strane ...
    ... koja je otkapana na vibro situ (poz. 17). 38 Drugi deo vibro sita (poz. 7 i 12) poseduje “Rima” prosevnu površinu sa otvorima prečnika 0,5 mm. Na tim sitima se vrši pranje kako krupnog tako i sitnog uglja gde se dobija oprani krupni ugalj klase krupnoće -60+5 mm (sito poz. 7) i oprani sitan ...

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... radius of the charge r0 and the distance from the blast site to monitoring point r increase in the same or approximately the same ratio, the soil oscillation velocity v remains the same. Sadovskii equation, given in Equation (1) may be expressed in the form [7]: v = Kv· ( r0 r )n (3) which denotes: ...
    ... radius of the charge rg and the distance from the blast site to monitoring point r increase in the same or approximately the same ratio, the soil oscillation velocity v remains the same. Sadovskii equation, given in Equation (1) may be expressed in the form [7]: T\n 2=K-(") 9 which denotes: v—the velocity ...
    ... blast site, characteristics of the rock material and the type of blasting, the equation of M.A. Sadovskii, where the oscillation velocity v is given in the form of the function, is most frequently used: v = K·R−n, (1) here R represents reduced distance, meaning the distance from the blast site to the ...

  • Nonequilibrium athermal random-field Ising model on hexagonal lattices

    Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević (2021)
    Изингов модел, хексагонална решетка

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... from the blast site, characteristics of the rock mass and the type of blasting, is the equation of M. A. Sadovskii that is used most commonly. In the paper, the law of Sadovskii is also derived in another way by using the quotient of the relationship between the relative increase in oscillation velocities ...
    ... blast site, characteristics of the rock material, and the type of blasting, the equation of M.A. Sadovskii, where the oscillation velocity v is given in the form of the function, is most frequently used: v “ K ¨ R´n (1) where R represents reduced distance, meaning the distance from the blast site to the ...
    ... Energies 2016, 9, 617 2 of 15 in addition to the seismic ones, those of air blast waves, fly rock, etc. Thus, production efficiency is increased and, at the same time, construction and mining facilities, as well as the environment in the vicinity of the blast site, are protected. 2. Soil Oscillation ...

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • In-vitro ispitivanje interakcija dva strukturno slična Rh(III) kompleksa Šifovih baza sa HSA/DNK i molekulski doking

    Aleksandar Mijatović, Ljubica Bacetić, Nikola Pavlović, Dušan Ćoćić, Milan Nikolić, Aleksandar Lolić, Rada Baošić (2021)
    Kompleksi metala sa tetradentatnim Šifovim bazama ispoljavaju različitu biološku aktivnost, što omogućava ciljne sinteze novih biološki aktivnih jedinjenja. Proučavane su interakcije H[Rh(acac2en)Cl2] (1) i H[Rh(phacac2en)Cl2] (2) sa humanim serum albuminom (HSA) i sa DNK, primenom fluorescentne i UV-Vis spektroskopije (298 K, pH 7,4). Dobijene su relativno visoke vrednost dinamičke konstante vezivanja (Ksv) i to 3,88·104 M-1 za (1), 7,02·104 M-1 za (2), što ukazuje na značajno vezivanje za HSA. Izračunate konstante unutrašnjeg vezivanja (Kb) su: 2,87·105 M-1 ...

  • 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
    ... clcar geochemical differences betwecn the lavas in the Dinarides (depleted) and those in Europe (enriched due to metasomatism). NEW INSIGHTS ” FROM ZIRCON PROVENANCE DATA In situ U-Pb dating of zircon grains has proven to be a powerful tool in provenance studies, providing information about ...
    ... the origin of lithologies in a source area, which has often been destroyed and recycled during preceding plate tectonic processes. Our research was conducted in two phases. In the first phase, we analyzed zircons from the main lithological units of the basement, while in the second phase, we analyzed ...
    ... less intense and somewhat younger (+~300 Ma) in the Dinarides. Permotriassic zircons constitute the strongest geochronological signal in all examined Dinarides samples (Africa), likely representing a ubiquitous signal in all Gondwana-affinity units in the Balkans, but are absent on the Europcan ...

  • Praktikum iz kvaliteta podzemnih voda

    Jana Štrbački (2022)
    kvalitet podzemnih voda, praktikum

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... for identifying inherited cores, cracks and inclusions inside zircon grain. U–Pb in-situ zircon dating and trace elements analyses of garnet were performed at the LA-ICP-MS laboratory of Geological Institute in Sofia, using New Wave UP193FX LA coupled to Perkin Elmer ICP-MS. Laser parameters were ...
    ... observational data. In: Gee D.G. & Stephenson R.A. (Eds.): European Lithosphere Dynamics. Geological Society, London, Memoirs 32, 191–206. Jackson S.E., Pearson N.J., Griffin W.L. & Belousova E.A. 2004: The application of laser ablation-inductively coupled plasma-mass spectrometry to in situ U-Pb zircon ...
    ... J., Zhang H., Wang J., Su L., Yang X. & Wu S. 2014: Origin of oscillatory zoned garnets from the Xieertala Fe–Zn skarn deposit, northern China: In situ LA–ICP-MS evidence. Lithos 190–191, 279–291. https://doi.org/10.1016/j.lithos.2013.12.017 ...

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... controlled succession as in the one at the Kostadinovica site (see KUTTEROLF et al., 2008). Based on the discovery of Dictyodora liebeana (GEINITZ) the age of the studied section is established as Early Carbonifer- ous instead of Devonian (KRSTIĆ, 1984) which is in accordance with the characteristics ...
    ... sedimentary characteristics corresponding to the model of extrabasinal tur- bidites (ZAVALA & PAN, 2018) and the concurrent fossil asso- ciation of in situ deep-marine ichnofossils and debris of vascular plants transported by hyperpycnal currents (ZAVALA et al., 2012). The identification of hyperpycnites ...
    ... Kostadinovica quarry in which 31.75 m of the siliciclastic succession is exposed. Analyzed sedimentary features were used for the determination of lithofacies and their internal relation- ships. Observed sedimentary characteristics along with palaeon- tological material from the site were further compared ...

  • Дефинисање геотехничких параметара еолских седимената земуснког платоа на основу лабораторијских и теренских SPT испитивања

    Ђорђе Крзман (2024)
    Циљ овог рада је био да се одреде геотехничке караткеристике предметног терена што представља полазну основу за рационално пројектовање и градњу. Истражним бушењем утврђено је да предметни терен изграђују четри лесна хоризонта и три слоја погребене земље до дубине од 22-23 m. Лабораторијским испитивањем добијени су ефективни параметри смичуће чврстоће, где се кохезија најчешће креће између c’=14 и 18 kPa, а угао унутрашњег трења f'= 25 - 30 °. Теренска SPT испитивањем уз коришћење прихваћених корелација у геотехничкој пракси ...
    лес, лабораторија, SPT, корелације, параметри
    ... SEDIMENTS: Sit and silty-sandy clays within which stand out: two horizons of buried |soil 1-2m thick (between elevation 71-73-dark red color and 75-77-dark yellow color), silly and silty clay |composition, with Mn and Fe staining in the form of scrum and carbonate concretions and veins; and one |sit horizon ...
    ... SEDIMENTS: Sit and silty-sandy clays within which stand out: hvo horizons of buried |soil 1-2m thick (between elevation 71-73-dark red color and 75-77-dark yellow color), silly and silty clay |composition, with Mn and Fe staining in the form of scrum and carbonate concretions and veins; and one- |sit horizon ...
    ... MeMĐba CBOJy IHpBOOMTHy CTpyKTypHy upBpcrohy. JIaOoparopHjcka HcnMTHBamba Ha y3Op1iHMa H3 OBE Cpe)IHHe HHCy BPIHICHa. AHaJIH3OM Ppe3yarrarTa „,in situ”” OnHTa JIOIIJIO 25 ce o noMaTaka O (DbH3HUKO — MeXaHHUKHM, OJIHOCHO OTHODpHO — JIe(bOpMaOHJIHHM KapakTepHcTHKaMa OBec cpejuiHe. V raGemu 6-1 ...

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... Economic Viability of in Situ Coal Gasification with Downtstream CO», Gluck- auf-Mining-Reporter: International Journal for Mining, Tunnelling, Equipment and Technology, Potsdam, Germany, 2009, 1, pp. 43-50 2] Petrović, D., Calculation of Underground Coal Gasification in Non-Balance Coal Reserves ...
    ... terrain surface. Such risks can be mitigated by the quality selection of the site for gasification. Regarding climate change and other environmental concerns, significant investments in clean coal technologies are evident in the world, with the alm of making rational use of this significant and ...
    ... coal utilization is no more than 20-25%, while in UCG it is about 72-96%, taking into account the useful volume of coal. Proper location selection for the UCG site, as well as the application of the necessary protective measures does not result in any significant pollution of the environment. There ...

  • Geostatički proračuni

    Gordana Hadži-Niković (2020)
    geostatika

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • Pregled hidrogeoloških istraživanja novootkrivenih ležišta metaličnih mineralnih sirovina na prostoru Srbije

    Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Sava Magazinović, Jakov Andrijašević (2022)
    Rastuća potražnja za mineralnim sirovinama, zavisnost evropske industrije od njihovog uvoza, kao i otvaranje tržišta u zadnjih 20-ak godina bili su pokretač intenzivnih istraživanja ležišta mineralnih sirovina na području Srbije. Ova istraživanja za rezultat su imala otkriće važnih ležišta bora i litijuma „Jadar“ i „Valjevo“, sedimentnih ležišta zlata „Bigar i Korkan“ i bakra i zlata „Čukaru Peki“. Sastavni deo ovih aktivnosti, posebno u okviru značajnijih novootkrivenih metaličnih ležišta, bila je hidrogeološka karakterizacija ležišta i okolorudnih terena. U razmatranom periodu ...
    rudnička hidrogeologija, rudničke vode, metalična ležišta, podzemne vode, Srbija

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... measurements as well, r - distance from the blast site to the monitoring point m, Q - amount of explosive kg. 2.1. Derivation of equation of rock mass oscillation law If, by blasting in the specific environment, the relative increase in the oscillation velocity of the rock mass and the ...
    ... Sadovski is commonly shown in the form: n redv K Q  (6) where is Qred reduced amount of explosive: 3 red Q Q r  (7) where is: r - the distance from the blast site to the monitoring point m, Q - overall amount of explosive in a mine series kg. ...
    ... affecting its magnitude, being: the amount of explosive, a distance from the blast site, characteristics of the rock material and a type of blasting, the equation of M.A. Sadovski, where the oscillation velocity v is given in the form of the function, is most frequently used: nv K R  where R is ...

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... and sintering temperature on the functional properties of BaTiOys /Ni„Zni _ „Fe>Ou (x = 0, 0.5, 1), NiFe)Oa, ZnFe>Oxu, and Nip,5Zno sFe>»Oa were in situ prepared by thermal decomposition onto BaTiOy surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 "C ...
    ... chloride (ZnCl>, 98%), toluene (99.8%)) were obtained from Sigma-Aldrich. All investigated ferrites (NiFe)»Oa, ZnFe>»Oa, Niop,5Zno,5Fe»Ou) were in situ prepared on BaTiOy particles by thermal decomposition method from appropriate acetylacetonate complexes ({Fe(acac),3], [Ni(acac).], and [Zn(acac)»] ...
    ... and ferroelectric properties of BaTiOx/Ni„Zni _xFe>Oa (x = 0, 0.5, 1) ceramic composites. Powders, NiFe>»Oa, ZnFe»Ou, and Nip sZno,sFe2Ou, were in situ synthesized by thermal decomposition of acetylacetonate precursors onto BaTiOa surface and additionally sintered at two chosen temperatures (1150 ...

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • Kvartarni klastiti iz bušotine kod Aranđelovca (rasadnik Mladost)

    Miroslav Radeta (2024)
    U ovom radu analizirani su kvartarni klastiti iz bušotine kod Aranđelovca IB 18-3, sa ciljem boljeg razumevanja njihovih sedimentoloških i litoloških karakteristika. Kvartarni sedimenti su prilično homogenog/uniformisanog sastava i čine ih finozrni klastiti (dominantno alevroliti) sa određenim procentom peskovite i glinovite frakcije. Oni su iskartirani u samoj povlati i debljina im je 27 m. U podini su gornjokredne karbonatne stene (krečnjaci, laporci, rekristalisali/mermerisani karbonati) i miocenski sediment predstavljeni raznovrsnim varijetetima klastično karbonatnih stena. Ispitivani kvartarni sedimenti odlikuju se odsustvom ...
    kvartarni klastiti, alevriti, Aranđelovac, granulometrija, mineraloško petrografski sastav
    ... na sitima, merimo i preračunavamo. Na osnovu poznate prvobitne mase proba izračunavamo procente masa, a njihovim sabiranjem ı kumulativni procenat. Na frakciji većoj manjoj od 0.063 mm rađena je pipet metoda. Kako je nakon mokrog prosejavanja težina materijala koji je prošao kroz sito, sito veličine ...
    ... pripreme, na situ od 0.003 mm, mokrim postupkom prosejavanja izdvojene su dve frakcije: frakcija veća od 0.063 mm i frakcija manja od 0.063 mm. Slika 3. Priprema uzoraka za granulometrijsku analizu. Frakcija krupnija od od 0.063 mm je osušena i proseJavana na standardnom slogu sita veličine 0 ...
    ... jednostavnost, ekonomičnost i visoku tačnost (Matović ı dr., 2019). Za izvođenje metode potrebna je Jednostavna oprema (instrumenti): sušnica, slog sita (Slika 3) i vaga za merenje mase izdvojenih frakcija. Za granulometrijska ispitivanja uzorci su na isti način pripremani. Iz homogenizovanih uzoraka ...

  • Mikroplastika u peloidima iz Srbije i Slovenije

    A. Šajnović, G. Gajica, F. Prosenc, S. Stojadinović, G. Veselinović, P. Trebše, P. Dabić, B. Jovančićević (2023)
    ... mikroplastike podrazumevao je određivanje sadržaja vlage u uzorcima peloida sušenjem do konstantne mase. Potom je rađeno mokro prosejJavanje kroz seriju sita veličine otvora ! mm, 500 um, 250 um ı 100 nm od nerđajućeg čelika (Retsch, Nemačka). Svakafrakcija je sakupljanana GF/C 45 mm filterusaveličinompora ...
    ... Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs ENVIROCHEM2023 Poster prezentacije Mikroplastika u peloidima iz Srbije i Slovenije Microplastics in peloids from Serbia and Slovenia 4. Šajnović ...
    ... Измењено: 2023-10-16 10:50:50 Mikroplastika u peloidima iz Srbije i Slovenije;Microplastics in peloids from Serbia and Slovenia A. Šajnović, G. Gajica, F. Prosenc, S. Stojadinović, G. Veselinović, P. Trebše, P. Dabić, B. Jovančićević Дигитални репозиторијум Рударск ...