Претрага
757 items
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Cenozoic igneous tectonomagmatic events in the Serbian part of the Balkan peninsula: inferences from K/Ar geochronology
Cvetković Vladica, Pécskay Zoltan, Šarić Kristina. "Cenozoic igneous tectonomagmatic events in the Serbian part of the Balkan peninsula: inferences from K/Ar geochronology" in Acta Volcanologica 01-Feb no. 25, Fabrizio Serra editore - Pisa-Roma :Italian Association of Volcanology (2013): 111-120. https://doi.org/http://dx.doi.org/10.1016/j.jv
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Variation of olivine composition in the volcanic rocks in the Songliao basin, NE China: lithosphere control on the origin of the K-rich intraplate mafic lavas
Zhang, L.-Y., Prelević Dejan, Li, N., Mertz-Kraus, R., Buhre, S.. "Variation of olivine composition in the volcanic rocks in the Songliao basin, NE China: lithosphere control on the origin of the K-rich intraplate mafic lavas" in Lithos 262 (2016): 153-168. https://doi.org/https://doi.org/10.1016/j.lith
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Comparative structural and optical properties of different ceria nanoparticles
Nikolić Aleksandar S., Bošković Marko, Fabian Martin, Božanić Dušan K., Vučinić-Vasić Milica, Kremenović Aleksandar, Antić Bratislav (2013)Nikolić Aleksandar S., Bošković Marko, Fabian Martin, Božanić Dušan K., Vučinić-Vasić Milica, Kremenović Aleksandar, Antić Bratislav. "Comparative structural and optical properties of different ceria nanoparticles" in Journal of Nanoscience and Nanotechnology 10 no. 13, 26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA:American Scientific Publishers (2013): 6787-6792. https://doi.org/10.1166/jnn.2013.7774
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Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles
Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...... material (Table 4S). Calculated values for the rate constants at 288 and 298 K are k1 288 = 0.31 ± 0.02 M-1s-1 and k1 298 = 0.92 ± 0.04 M-1 s-1. Finally, a negative value for the entropy of activation, DS= = -105 ± 5 K-1M-1, confirms the fact that the substitution reaction between [Ru(trpy)(bpy)Cl] ...
... ?. The formation of complex with oxyl radical (O-) has already been published [29, 48]. The equilibrium constant (K) for the dimerization reaction (Eq. 4) was determined to be log K = 3.45 (=log- b20-1 - log b10-1). A distribution diagram for [Ru(trpy)(bpy)H2O] 2? hydrolytic species is shown in ...
... Supplementary material (Table 4S). Calculated values for the rate constants at 288 and 298 K are kK = 0.31 + 0.02 M's! and k7?* = 0.92 + 0.04 M7! s_'. Finally, a negative value for the entropy of activation, AS* = -105 +5 K~'M7~!, confirms the fact that the substitution reaction between [Ru(trpy)(bpy)Cl]* and ...Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović. "Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles" in Monatshefte für Chemie - Chemical Monthly, Springer Science and Business Media LLC (2013). https://doi.org/10.1007/s00706-013-1044-1
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Stabilization And Monitoring Of The Slope Deformation Appearance On Marl Open-Pit Filijala In Order To Minimize The Risk Of Exploitation
Gojković Nebojša, Čebašek Vladimir, Ganić Aleksandar, Milutinović Aleksandar. "Stabilization And Monitoring Of The Slope Deformation Appearance On Marl Open-Pit Filijala In Order To Minimize The Risk Of Exploitation" in Proceedings of the 5th International Geomechanics Conference, Varna:Scientific and Technical Union of Mining, Geology and Metalurgy (2012): 220-227
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Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes
Antić Bratislav, Rogan Jelena, Kremenović Aleksandar, Nikolić Aleksandar S., Vučinić-Vasić Milica, Božanić Dušan K., Goya Gerardo F., Colomban Philippe (2010)Antić Bratislav, Rogan Jelena, Kremenović Aleksandar, Nikolić Aleksandar S., Vučinić-Vasić Milica, Božanić Dušan K., Goya Gerardo F., Colomban Philippe. "Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes" in Nanotechnology 24 no. 21, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND:IOP Publishing LTD (2010). https://doi.org/10.1088/0957-4484/21/24/245702
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МОДЕЛЬНЫЕ ПОДХОДЫ К ОЦЕНКЕ ЖИЗНЕННОГО ЦИКЛА ВСПОМОГАТЕЛЬНЫХ МАШИН НА ПРИМЕРЕ УГОЛЬНОГО КАРЬЕРА В СЕРБИИ, Физико - технические проблемы разработки полезных ископаемых
Д.Я. Крунич, Вујић Слободан, Танасијевић Милош, Димитријевић Бојан, Шубарановић Томислав, С. Илич, С. Максимович (2018)Д.Я. Крунич, Вујић Слободан, Танасијевић Милош, Димитријевић Бојан, Шубарановић Томислав, С. Илич, С. Максимович. "МОДЕЛЬНЫЕ ПОДХОДЫ К ОЦЕНКЕ ЖИЗНЕННОГО ЦИКЛА ВСПОМОГАТЕЛЬНЫХ МАШИН НА ПРИМЕРЕ УГОЛЬНОГО КАРЬЕРА В СЕРБИИ, Физико - технические проблемы разработки полезных ископаемых" in Институт горного дела Сибирского отделения Российской Академии Наук 3, Новосибирск, Россия:Институт горного дела Сибирского отделения Российской Академии Наук (2018): 51-61. https://doi.org/10.15372/FTPRPI20180306
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Gas-lift wells optimization at the oil field "K"
Dušan Danilović, Marija Ilić, Miroslav Crnogorac, Lola Tomić. "Gas-lift wells optimization at the oil field "K"" in Podzemni radovi, University of Belgrade - Faculty of Mining and Geology (2022). https://doi.org/10.5937/podrad2241031D
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Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings
... given in the form: v = K·R−n = K· ( r 3 √ Q )−n (2) where there are: v—the velocity of rock mass oscillation (cm/s) K—the coefficient conditioned by soil characteristics as well as blasting conditions where the explosive amount is given by way of the volume. K is being determined by terrain surveying ...
... Sadovskii [7] is given in the form: v= KR" =K( r )- (2) where there are: v—the velocity of rock mass oscillation (cm/s) K—the coefficient conditioned by soil characteristics as well as blasting conditions where the explosive amount is given by way of the volume. K is being determined by terrain surveying ...
... expressed in the form [7]: T\n 2=K-(") 9 which denotes: v—the velocity of rock mass oscillation (cm/s) K,—the coefficient conditioned by rock mass characteristics as well as blasting conditions where the explosive amount is given through radius of the explosive charge. K is being determined by terrain ...Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić. "Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings" in Minerals, Basel : MDPI AG, Basel, Switzerland (2018). https://doi.org/10.3390/min8020070
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The analysis of the geothermal energy capacity for power generation in Serbia
Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk (2013)... reactions or the solubility of some minerals. Re- searchers mostly use silicon-based (quartz, chalcedony, amorphous silica) and cation-based (Na-K, Na-K-Ca, Na-K-Mg, and so forth) geothermometers. Temper- atures of some prospectively abundant geothermal water resources in Serbia are estimated using the ...
... this dependence (van't Hoff equation). Conventional geothermometers are based on silicon (quartz, chalcedony, and amorphous silica), cations (Na-K, Na-K-Ca, Na-K-Mg, etc.) and isotopes. Temperature equation for each geothermometer includes a specific equilibrium constant for the given mineral-water reaction ...
... this dependence (van't Hoff equation). Conventional geothermometers are based on silicon (quartz, chalcedony, and amorphous silica), cations (Na-K, Na-K-Ca, Na-K-Mg, etc.) and isotopes. Temperature equation for each geothermometer includes a specific equilibrium constant for the given mineral-water reaction ...Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk. "The analysis of the geothermal energy capacity for power generation in Serbia" in Thermal Science, National Library of Serbia (2013). https://doi.org/10.2298/TSCI120215033S
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Cretaceous ultrapotassic magmatism from the Sava-Vardar Zone of the Balkans
Kristijan Sokol, Dejan Prelević, Rolf Romer, Milica Božović, Paul van den Bogaard, Elitsa Stefanova, Bojan Kostić, Nenad Čokulov (2020)Late Cretaceous global plate reorganization associated with the inception of counterclockwise rotation of Africa relative to Europe initiated in the Balkan region small-volume magmatism of diverse geochemical signature along the enigmatic Sava-Vardar Zone. We study a Late Cretaceous lamprophyric sill in Ripanj village near Belgrade to constrain this magmatic episode. The lamprophyre is characterized by high contents of Na, P, Fe and Al, and low contents of K, Ca and Mg. Its original nature (Na, K, Ca and Mg) is ...Kristijan Sokol, Dejan Prelević, Rolf Romer, Milica Božović, Paul van den Bogaard, Elitsa Stefanova, Bojan Kostić, Nenad Čokulov. "Cretaceous ultrapotassic magmatism from the Sava-Vardar Zone of the Balkans" in Lithos (2020)
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NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands
Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić (2012)Reakcije supstitucije monofunkcionalnog [Ru(terpi)(bipi)(H2O)]2+ kompleksa, gde je terpi = 2,2′:6′,2″-terpiridin i bipi = 2,2′-bipiridin, sa biološki relevantnim sumporo donorskim ligandima, kao što su tiourea, l-metionin, l-cistein i glutation, proučavane su u vodenim rastvorima tehnikom 1H i 13C NMR spektroskopije. Sve reakcije su proučavajne na pH 7,4, u prisustvu fosfatnog pufera, da bi se oponašalo fiziološko okruženje tokom procesa supstitucije. Reakcije se izvode na 295 K pod uslovima reakcija drugog reda. Uočeni rezultati pokazuju da brzina supstitucije snažno zavisi ...Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić. "NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands" in Inorganica Chimica Acta, Elsevier BV (2012). https://doi.org/10.1016/j.ica.2012.09.016
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Effects of Eu3+ concentration on structural, optical and vibrational properties of multifunctional Ce1-xEuxO 2-delta nanoparticles synthesized by thermolysis of 2,4-pentanedione complexes
Kremenović Aleksandar, Božanić Dušan K., Welsch Ana-Maria, Jancar Bostjan, Nikolić Aleksandar S., Bošković Marko, Colomban Philippe, Fabian Martin, Antić Bratislav (2012)Kremenović Aleksandar, Božanić Dušan K., Welsch Ana-Maria, Jancar Bostjan, Nikolić Aleksandar S., Bošković Marko, Colomban Philippe, Fabian Martin, Antić Bratislav. "Effects of Eu3+ concentration on structural, optical and vibrational properties of multifunctional Ce1-xEuxO 2-delta nanoparticles synthesized by thermolysis of 2,4-pentanedione complexes" in Journal of Nanoscience and Nanotechnology 12 no. 12, 26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA:MER SCIENTIFIC PUBLISHERS (2012): 8893-8899. https://doi.org/10.1166/jnn.2012.6797
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Trace elements and Sr-Nd-Pb isotopes of K-rich, shoshonitic, and calc-alkaline magmatism of the Western Mediterranean Region: Genesis of ultrapotassic to calc-alkaline magmatic associations in a post-collisional geodynamic setting
Conticelli Sandro, Guarnieri Luisa, Farinelli Alice, Mattei Massimo, Avanzinelli Riccardo, Bianchini Gianluca, Boari Elena, Tommasini Simone, Tiepolo Massimo, Prelević Dejan, Venturelli Giampiero (2009)Conticelli Sandro, Guarnieri Luisa, Farinelli Alice, Mattei Massimo, Avanzinelli Riccardo, Bianchini Gianluca, Boari Elena, Tommasini Simone, Tiepolo Massimo, Prelević Dejan, Venturelli Giampiero. "Trace elements and Sr-Nd-Pb isotopes of K-rich, shoshonitic, and calc-alkaline magmatism of the Western Mediterranean Region: Genesis of ultrapotassic to calc-alkaline magmatic associations in a post-collisional geodynamic setting" in Lithos 107, Amsterdam, Netherlands Београд :Elsevier BV Elsevier BV (2009): 68-92. https://doi.org/10.1016/j.lithos.2008.07.016
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Proračun kapaciteta bagera u selektivnom radu na Pk ,,Drmno
Dušan Stanisavljević (2024)U ovom Završnom radu obrađena je problematika proračuna kapaciteta bagera u površinskoj eksploataciji ležišta mineralnih sirovina. Dat je prikaz opštih karakteristika i načina rada rotornih bagera, kao i proracun kapaciteta bagera u selektivnom radu na PK ,,Drmno,,. Urađena je analiza dobijenih rezultata I izveden krajinji zaključak iz istih.... podetaže: V. 5757 k = = T” TW :q:n 88,7·1,24·89 = 0,588 Tehnički kapacitet rotornog bagera: 6600 I =— k · k = —— · 0,588 · 0,95 = 2836 mžčm/h k 1,3 55 > II podetaža – jalovina: Granični ugao regulacije: q:n i 1,24 · 89 ii r Vbojmax32-0,7.1,3 30 coS r = hrisuy k Osnovna brzina ...
... podetaže: Veu 3070 k = JJ –––—:100.1 ——— = 0,561 Te :q:n 49,6·1,24·89 Tehnički kapacitet rotornog bagera: Qt 6600 i Qunu = k kg ko = KE 0,561 · 0,95 = 2706 mŠčm/h r , 56 > III podetaža – ugalj: Granični ugao regulacije: q:n 1,24 · 89 ii r Ubo,max m coS r = h Sm k TII Osnovna brzina ...
... bagera: Q: 6600 i Qumu = k k ko = KE 0,362 · 0,95 = 1745 mŠčm/h r , 57 > IV podetaža – jalovina: Granični ugao regulacije: q:n cos črIV i pj 1'24 · 89 o h * Sıv * y * Ubo,max WTIV Osnovna brzina okretanja nosača radnog točka: _ q:n _ 1,24:89 PboW= — y-s -k 1,0.0,7.1,3 = 121,3 m/min ...Dušan Stanisavljević. Proračun kapaciteta bagera u selektivnom radu na Pk ,,Drmno, 2024
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Приказ коморно-стубне методе откопавања са подетажним откопавањем стубова и накнадним засипавањем откопа
Милош Вуковић (2024)Коморно-стубна метода откопавања са подетажним откопавањем стубова се користи за рудне жиле и сочива, стрмог пада.У овом раду су приказани основни елементи примењене методе откопавања као што су: димензионисање просторија припреме, бушачко-минерски радови,утовар и транспорт,вентилација и запуњавање откопаног простора паста засипом. Анализом трошкова прорачуната је цена израде припремних просторија, по дужном метру, на основу квалитета радне средине у којима се израђују. Такође, анализирани су трошкови при експлоатацији руде и приказани су јединичном вредношћу USD/t (долара по тони руде).На крају ...... OJIMHHHpaHa y OKBHpy nmojaca -260/-320 cnynrra Ha HHBO K-320 m, JIoK ce py)a o)MHHupaHa y mojacy -320/- 380 cnrymra Ha HHBoO K-380 m. Pyyna ce ca nOMeHyTHX HHBO4a yTOBapa rpaBHTaHNHJCKH crymra py}lHHM OKHOM JIO JpoOMnMuHOTr HOCTpOJePa Ha KOTH K-435 m, ojakJe cc TpaHCIOpTHOM TpaKOM H3BO3H Ha TIIOBpIHIHHy ...
... TpaHCHOPpT HajOOJbe OpraHH3OBaTH Ha cnenehuH HauHH: • OJMMHHHPpaHa pyha ce H3 OTKOHa yTOBapyje yroBapHBaueM HOCHBOCTH 14 t Ha HHBOHMa K-320 M K-380, KOJHM Ce JIy)K TpaHCHOpTHOTr XOMđHMKa (TX) TpaHcnopTyJe JIo HajOmMDker py}iHor oKHa (PO), • py},HHMM OKHOM, pyJta ce rpaBHranujcKH crymrra o OyHKepa ...
... rpejicraBJbajy KOPbyrOBaHe CeTOBe CMHuyhHX ITyKOTHHa JUy?K KOJHX je MH3BpHIČHO peBEpcHO KpeTaPe, H OHHM Cy HNojpeDeHo HpHcyTHH Ha je3rpMMa HcTpaxxHax OymroTuHa. Jipyra 2 cera IIr3 a IIr4 npencraBJbajy KOPbyrOBaHe CeTOBC cMHuyhux HyKOTHHa JIy)K KOJHX Je H3BpHIeHO TpaHCKypeHTHO KpeTabbe. Pacemu H ...Милош Вуковић. Приказ коморно-стубне методе откопавања са подетажним откопавањем стубова и накнадним засипавањем откопа, 2024
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Advancing Sentiment Analysis in Serbian Literature: A Zero and Few-Shot Learning Approach Using the Mistral Model
Ova studija predstavlja analizu sentimenta srpskih starih romana iz perioda 1840-1920, koristeći veliki jezički model (LLM) Mistral za tehniku učenja sa zasnovani na takozvanim "zero" i "few-shot" pokušajima. Glavni pristup uvodi inovacije osmišljavanjem istraživačkih upita (promptova) uključuju tekst sa uputstvom za klasifikaciju bez primera i na osnovu nekoliko primera, omogućavajući jezičkom modelu da klasifikuje osećanja u pozitivne, negativne ili objektivne kategorije. Ova metodologija ima za cilj da pojednostavi analizu osećanja ograničavanjem odgovora, čime se povećava preciznost ...Milica Ikonić Nešić, Saša Petalinkar, Mihailo Škorić, Ranka Stanković, Biljana Rujević. "Advancing Sentiment Analysis in Serbian Literature: A Zero and Few-Shot Learning Approach Using the Mistral Model" in In Proceedings of the Sixth International Conference on Computational Linguistics in Bulgaria (CLIB 2024), BAS (2024)
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Numerical modelling of the roughly simultaneous emplacement of two distinct ophiolite belts
Nikola Stanković, Vesna Cvetkov, Vladica Cvetković. "Numerical modelling of the roughly simultaneous emplacement of two distinct ophiolite belts" in 5th Congress Geologists of the Republic of North Macedonia, Ohrid, 28-29. 10. 2024, Македонско геолошко друштво (2024)
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Malathion-induced inhibition of human plasma cholinesterase studied by the fluorescence spectroscopy method
The in vitro effect of technical grade malathion was assessed via the kinetic parameters of human plasma butyrylcholinesterase (BChE) using N-methylindoxyl acetate as a substrate for BChE. An inhibitor kinetics study demonstrated the existence of a biphasic inhibition curve, indicating high- and low-affinity binding sites of malathion. The IC50 values as calculated from the experimental inhibition curves were 1.33 × 10–9 and 1.48 × 10–5 M for the high- and low-affinity binding sites, respectively; Hill’s analysis gave 1.29 × ...V. M. Pavelkić, K. S. Krinulović, J. Z. Savić, M. A. Ilić. "Malathion-induced inhibition of human plasma cholinesterase studied by the fluorescence spectroscopy method" in Russian Journal of Physical Chemistry A, Pleiades Publishing Ltd (2008). https://doi.org/10.1134/S0036024408050312
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Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)
Kostadin J. Jovanov (2016-06-24)Leţišta uglja „Suvodol“, „Brod-Gneotino“ su u eksploataciji, a leţište uglja „Ţivojno“je u fazi pripremi. Nalaze se u krajnjem jugoistočnom i juţnom delu Pelagonijskekotline. Sva tri leţišta stvorena su u neogenim sedimentima u jezerskim uslovimasedimentacije u zoni kontakta sa prekambrijumskim kristalastim stenama. Kod sva trileţišta ugalja se javljaju više slojeva različite debljine, u okviru kojih se nalaze klastičnisedimenti (gline, peskovi i dr.). U podini ugljenog basena nalaze se kristalaste steneprekambrijumske starosti.Teren u okolini leţišta uglja karakteriše se umereno kontinentalnom klimom, ...ugalj, podzemne vode, površinske vode, neogeni kompleks, izdani,transmisibilnost, nivo podzemne vode, sniţenje nivoa... ) pH -v re dn os t M a k r o k o m p o n e n t e M i k r o k o m p o n e n t e U ku pn a tv rd oć a (0 dH ) M in er al iz ac ij a M ( g/ l) T ip v od a po A le ki nu K a t j o n i (mg/l) A n j o n i (mg/l) Fe Mn Ni Cu F Sr Na+K Ca Mg Cl HCO3 SO4 (mg/l) ...
... Ca40 (Na+K)16 Bušotina s. Poeševo SO 4 59 HCO 3 27 Cl14 (Na+K)52 Mg29 Ca19 Bušotina s. Kremenica HCO 3 95 Ca47 Mg36 (Na+K)16 Bušotina s. Germijan HCO 3 78 Cl20 (Na+K)72 Mg22 Ca6 Bušotina s. Egri HCO 3 71 SO 4 27 Mg71 Ca18 (Na+K)11 Bunar s. Ribarci HCO 3 77 Cl16 SO 4 7 (Na+K)43 Ca36 ...
... Makovo HCO 3 74 SO 4 17 Cl9 Mg58 Ca24 (Na+K)17 s. Rapeţ HCO 3 73 Cl26 (Na+K)42 Mg36 Ca22 s. Suvodol HCO 3 65 Cl28 SO 4 7 Mg57 Ca26 (Na+K)17 Suvodolska reka HCO 3 83 Cl20 SO 4 7 Mg48 Ca26 (Na+K)26 s. Germijan HCO 3 77,7 SO 4 15,5 Cl6,8 Mg43,8 Ca43 (Na+K)13,2 Izuzetak predstavljaju vode sa ...Kostadin J. Jovanov. "Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-06-24)