Претрага
457 items
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The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments
Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...... additional 25 min. Detailed analyses of the target compounds were conducted using the following ion chromatograms: m/z = 71 (n-alka- nes and isoprenoids), m/z = 191 (terpanes) and m/z = 217 (steranes). The individual peaks were identified by comparison with literature data12 and based on the total mass ...
... distribution of n-alkanes C16–C35 (mass chromatogram m/z 71), CPI (C16–C35) = 1/2 [Σodd(n-C17–n-C35) / Σeven(n-C16–n-C34) + Σodd(n-C17–n-C35) / Σeven(n-C18–n- –C36)]; bCPI determined for the distribution of n-alkanes C16–C22 (mass chromatogram m/z 71), CPI (C16– –C22) = 1/2 [Σodd(n-C17–n-C21) / Σeve ...
... TISZA RIVER SEDIMENTS 609 Fig. 6. GC–MS chromatograms of terpanes m/z 191 of the saturated fraction isolated from Elemir crude oils. For peak assignments, see the legend to Fig. 3. Fig. 7. GC–MS chromatograms of steranes, m/z 217 of the saturated fraction isolated from Rusanda crude oils. For ...Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević. "The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments" in Journal of Serbian Chemical Society, Beograd : Srpsko hemijsko društvo (2013). https://doi.org/10.2298/JSC130614087S
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Structure, interaction with biomolecules, and cytotoxicity of copper (II) complexes chelating some Schiff base ligands
Aleksandar Mijatović, Angelina Z. Caković, Aleksandar Lolić, Olivera Klisurić, Marko N. Živanović, Dragana S. Šeklić, Snežana Sretenović, Marija Ilić, Jovana Bogojeski (2023)Cancer remains one of the world's deadliest diseases, claiming many lives each day. Transition metal complexes are leading candidates in developing anticancer agens with cisplatin used in chemotherapy worldwide. Copper, an endogenous metal in the human body, is especially attractive because of its typical redox biological activities and a relatively strong affinity to nucleobases. A series of Cu(II) complexes with ethane-1,2-diamine as the amine part and pentane-2,4-dione and/or 1-phenylbutane-1,3-dione, pentane-2,4-dione and/or 1,1,1- trifluoropentane-2,4-dione, or 1,1,1-trifluoropentane-2,4-dione and/or 1-phenylbutane-1,3-dione as the ...Aleksandar Mijatović, Angelina Z. Caković, Aleksandar Lolić, Olivera Klisurić, Marko N. Živanović, Dragana S. Šeklić, Snežana Sretenović, Marija Ilić, Jovana Bogojeski. "Structure, interaction with biomolecules, and cytotoxicity of copper (II) complexes chelating some Schiff base ligands" in Applied Organometallic Chemistry, Wiley (2023). https://doi.org/10.1002/aoc.7253
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The challenges for Z-generation geologists
Dejan Radivojević (2022)Nastupajuća generacija geologa suočava se sa nekim problemima koji su poznati i njihovim prethodnicima, ali takođe i sa do sada novim i nepoznatim izazovima. Činjenica da mnogi geologiju povezuju sa „prljavim“ industrijama u kojima će biti sve manje prilika za zaposlenje u vreme kada se teži čistoj vodi, zemljištu i vazduhu kao i to da je smatraju zastarelom u sadašnje vreme brzog tehnološkog razvoja dovela je do velikog pada interesovanja za studije geologije svuda u svetu. Neophodno je još ...Dejan Radivojević. "The challenges for Z-generation geologists" in Tehnika, Beograd : Savez inženjera i tehničara Srbije (2022). https://doi.org/10.5937/tehnika2201037R
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Water in the Alluaudite Type-Compounds: Synthesis, Crystal Structure and Magnetic Properties of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H,□)0.5(H2O,H3O)0.5]2x+
In this study, a new cobalt arsenate belonging to the alluaudite supergroup compounds with the general formula of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H, )0.5(H2O,H3O)0.5]2x+ (denoted as CoAsAllu) was synthesized under hydrothermal conditions. Its crystal structure was determined by a room-temperature single-crystal X-ray diffraction analysis: space group C2/c, a = 11.6978(8), b = 12.5713(7), c = 6.7705(5) Å, b = 113.255(5)◦, V = 914.76(11) Å3, Z = 2 for As6H8Co6O25. It represents a new member of alluaudite-like protonated arsenates and the first alluaudite-like phase ...супергрупа алуаудита, арсенати прелазних метала, хидротермална синтеза, кристална структура, хидратисани хидрокси-арсенати, стехиометрија, магнетна својстваTamara Đorđević, Ljiljana Karanović, Marko Jagodič, Zvonko Jagličić. "Water in the Alluaudite Type-Compounds: Synthesis, Crystal Structure and Magnetic Properties of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H,□)0.5(H2O,H3O)0.5]2x+" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11121372
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Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation
Franković Maja, Novaković Nevenka, Matović Vesna. "Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation" in Environmental Earth Sciences no. december, Berlin, Heidelberg:Springer-Verlag (2014). https://doi.org/10.1007/s12665-014-3843-z
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Mineralogy and characterization of deposited particles of the aero sediments collected in the vicinity of power plants and the open pit coal mine: Kolubara (Serbia)
Cvetkovic Željko, Logar Mihovil, Rosić Aleksandra. "Mineralogy and characterization of deposited particles of the aero sediments collected in the vicinity of power plants and the open pit coal mine: Kolubara (Serbia)" in Environmental Science and Pollution Research 20 no. 5, Berlin : Heidelberg:Springer (2013): 3034-3049. https://doi.org/10.1007/s1356-012-1154-z
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Timok Scientific Tornado- TNT - a model for science popularization and the development of competencies through cooperation with the stakeholders
Ranđelović Dragan, Randjelović Nataša, Ranđelović Dragana. "Timok Scientific Tornado- TNT - a model for science popularization and the development of competencies through cooperation with the stakeholders" in Proceedings of XXV International Conference on Ecological Truth, :Univerzitet u Beogradu, Tehnički fakultet u Boru Univerzitet u Beogradu, Tehnički fakultet u Boru (2017): 478-484
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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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Potencijalnost tercijarnih magmatskih kompleksa Vardarske zone Srbije sa aspekta arhitektonskog građevinskog kamena
Lidija M. Kurešević (2014-01-22)U sastavu Vardarske zone, jedne od tektonski najsloženijih oblasti Balkanskogpoluostrva, u čijem domenu se odvijalo otvaranje i zatvaranje okeanskih prostora isubdukcija koja je dovela do intenzivne magmatske aktivnosti pretežno tokom tercijara,danas se nalazi veći broj magmatskih kompleksa.U ovoj disertaciji su obrađene geološke karakteristike trinaest izabranih magmatskihkompleksa Vardarske zone tercijarne starosti, i laboratorijski određena mineraloškopetrografskasvojstva stena u njihovom sastavu i fizičko-mehanička svojstva kamenaznačajna za utvrđivanje mogućnosti njihove primene za dobijanje blokovaarhitektonskog građevinskog kamena iz kojih se dobijaju ploče za oblaganjegrađevinskih ...... karakteristike šireg područja Kopaonika.- Radovi Geoinstituta, knj. 25, str. 53-61. Koroneos A., Poli G., Cvetković V., Christofides G., Krstić D. and Pécskay Z., 2011: Petrogenetic and tectonic inferences from the study of the Mt Cer pluton (West Serbia).- Geological magazine, vol. 148, no. 1, p ...
... mathématiques et naturelles, Sciences naturelles, No. 20, p. 99-108, Beograd. Karamata S. and Krstić B., 1996: Terranes of Serbia and neighbouring areas.- In: Terranes of Serbia. Eds. V. Knežević and B. Krstić, p. 25-40, Beograd. Karamata S., Dimitrijević N. M. and Dimitrijević D. M., 1999: Oceanic ...
... basen). U oblasti Dinarida, subdukcija dela tetiskog Vardarskog okeana ka istoku se odvijala tokom kasnog mezozoika i ranog paleogena (Karamata and Krstić, 1996). Zatvaranje ogranaka Tetisa (Vardarskog okeana) se u dinaridskom regionu odvijalo tokom gornje krede i donjeg paleocena. Subdukcija i procesi ...Lidija M. Kurešević. "Potencijalnost tercijarnih magmatskih kompleksa Vardarske zone Srbije sa aspekta arhitektonskog građevinskog kamena" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-01-22)
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Potencijalnost tercijarnih magmatskih kompleksa Vardarske zone Srbije sa aspekta arhitektonskog građevinskog kamena
Lidija M. Kurešević (2014-01-22)U sastavu Vardarske zone, jedne od tektonski najsloženijih oblasti Balkanskogpoluostrva, u čijem domenu se odvijalo otvaranje i zatvaranje okeanskih prostora isubdukcija koja je dovela do intenzivne magmatske aktivnosti pretežno tokom tercijara,danas se nalazi veći broj magmatskih kompleksa.U ovoj disertaciji su obrađene geološke karakteristike trinaest izabranih magmatskihkompleksa Vardarske zone tercijarne starosti, i laboratorijski određena mineraloškopetrografskasvojstva stena u njihovom sastavu i fizičko-mehanička svojstva kamenaznačajna za utvrđivanje mogućnosti njihove primene za dobijanje blokovaarhitektonskog građevinskog kamena iz kojih se dobijaju ploče za oblaganjegrađevinskih ...... karakteristike šireg područja Kopaonika.- Radovi Geoinstituta, knj. 25, str. 53-61. Koroneos A., Poli G., Cvetković V., Christofides G., Krstić D. and Pécskay Z., 2011: Petrogenetic and tectonic inferences from the study of the Mt Cer pluton (West Serbia).- Geological magazine, vol. 148, no. 1, p ...
... mathématiques et naturelles, Sciences naturelles, No. 20, p. 99-108, Beograd. Karamata S. and Krstić B., 1996: Terranes of Serbia and neighbouring areas.- In: Terranes of Serbia. Eds. V. Knežević and B. Krstić, p. 25-40, Beograd. Karamata S., Dimitrijević N. M. and Dimitrijević D. M., 1999: Oceanic ...
... basen). U oblasti Dinarida, subdukcija dela tetiskog Vardarskog okeana ka istoku se odvijala tokom kasnog mezozoika i ranog paleogena (Karamata and Krstić, 1996). Zatvaranje ogranaka Tetisa (Vardarskog okeana) se u dinaridskom regionu odvijalo tokom gornje krede i donjeg paleocena. Subdukcija i procesi ...Lidija M. Kurešević. "Potencijalnost tercijarnih magmatskih kompleksa Vardarske zone Srbije sa aspekta arhitektonskog građevinskog kamena" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-01-22)
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Sinteza i strukturna karakterizacija novih cezijumskih i kalijumskih silikata sa elementima retkih zemalja
Predrag Z. Dabić (2022)Predmet i ciljevi naučnog istraživanja ove doktorske disertacije su sinteza i strukturna karakterizacija novih cezijumskih i kalijumskih silikata sa elementima retkih zemalja. Istraživanja su izvedena u okviru sistema SiO2–REE2O3–XF, gde REE predstavlja trovalentni katjon elementa retkih zemalja (Sc, Y, Sm, Eu, Gd, Ho, Er, Tm, Yb, Lu), dok X predstavlja jednovalentni katjon alkalnih metala (K, Cs). Rad na disertaciji bio je fokusiran na sintezu monokristala, određivanje kristalnih struktura, kao i na kristalografsko i kristalohemijsko ispitivanje sintetisanih monokristala. Monokristali su sintetisani ...alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu, elementi retkih zemaljaPredrag Z. Dabić. Sinteza i strukturna karakterizacija novih cezijumskih i kalijumskih silikata sa elementima retkih zemalja, Beograd : P. Dabić, 2022
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Fizičko-hemijsko raspadanje krečnjaka ugrađenih u objekte Beogradske tvrđave i mogućnost konsolidacije
Maja Z. Franković (2022)Beogradska tvrđava, spomenik kulture od izuzetnog značaja za Republiku Srbiju, izgrađena je od krečnjaka badenske starosti. Njihova litološka heterogenost, u sadejstvu sa uticajima okruženja, rezultira visokim intenzitetima raspadanja. Korelacijom intrinzičnih sa ekstrinzičnim faktorima, definisani su fizičko-hemijski procesi raspadanja ugrađenih mikrofacija krečnjaka. Aplikacijom neorganskih konsolidanata na karbonatnoj bazi (nano-kreča i Ca-acetoacetata) i alkoksisilana, te korelacijom fizičko-mehaničkih svojstava pre i nakon tretmana, ispitana je efektivnost u pogledu zaustavljanja dekohezije krečnjaka. Određivanjem petroloških, tehničkih svojstava i mapiranjem formi raspadanja Mračne kapije kao ...krečnjaci, forme i intenziteti degradacije, fizičko-hemijsko raspadanje, konsolidacija, nano-kreč, Ca-acetoacetat, alkoksisilani, Mračna kapijaMaja Z. Franković. Fizičko-hemijsko raspadanje krečnjaka ugrađenih u objekte Beogradske tvrđave i mogućnost konsolidacije, Beograd : M. Franković, 2022
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On the distribution modulo 1 of the sum of powers of a Salem number
Dragan Stankov (2016)It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "On the distribution modulo 1 of the sum of powers of a Salem number" in Comptes rendus Mathematique (2016). https://doi.org/10.1016/j.crma.2016.03.012
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Funkcionisanje i uticaj epikarsta na režim, bilans i kvalitet podzemnih voda istočnog dela karstnog sistema Suve planine
Branislav Z. Petrović (2020)Epikarst je deo karstne izdani koji se nalazi u okviru nadizdanske zone i predstavlja kompleksnu tačku dodira i mešanja nekonsolidovanog materijala sa površine terena, ostataka karbonatnih stena izmenjenih korozivnim delovanjem vode, živog sveta i njihovih ostataka, koja je delimično zasićena podzemnom vodom. Kompletan sud o stepenu razvoja i prisustva epikarsta na nekom krečnjačkom terenu moguće je doneti uz multidisciplinarna i obavezna detaljna hidrogeološka istraživanja. Poligon za sprovedena istraživanja je bio karstni masiv Suve planine, koja u geološkom i geografskom smislu ...epikarst, karstni sistem, podzemne vode, procesi samoprečišćavanja, hidrohemijski i mikrobiološki procesi u podzemnoj vodiBranislav Z. Petrović. Funkcionisanje i uticaj epikarsta na režim, bilans i kvalitet podzemnih voda istočnog dela karstnog sistema Suve planine, Beograd : [B. Petrović], 2020
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Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems
Dejan Ćebić, Nebojša M. Ralević (2021)Dejan Ćebić, Nebojša M. Ralević. "Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems" in Journal of Mathematical Chemistry, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10910-021-01253-3
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A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor
Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić. "A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor" in Transportation Planning and Technology, Informa UK Limited (2023). https://doi.org/10.1080/03081060.2023.2245389
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3D modeling and monitoring of karst system as a base for its evaluation and utilization: a case study from eastern Serbia
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeSaša Milanović, Zoran Stevanović, Ljiljana Vasić, Vesna Ristić-Vakanjac. "3D modeling and monitoring of karst system as a base for its evaluation and utilization: a case study from eastern Serbia" in Environmental Earth Sciences, Springer Science and Business Media LLC (2013). https://doi.org/10.1007/s12665-013-2591-9
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Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling
Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeBranislav Petrović, Veljko Marinović, Zoran Stevanović. "Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling" in Environmental Earth Sciences, Springer Science and Business Media LLC (2023). https://doi.org/10.1007/s12665-023-10911-5
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An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction
Dejan Ćebić, Nebojša Ralević, Marina Marčeta. "An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction" in Mathematical Communications (2020)
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Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides
Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis... of the metamorphic sole from the Mirdita nappe, northern Albania. Ofioliti, 27(1), 21-40. Chiari, M., Djerić, N., Garfagnoli, F., Hrvatović, H., Krstić, M., Levi, N., et al. (2011). The geology of the Zlatibor-Maljen area Western Serbia: A geotraverse across the ophiolites of the Dinaric-Hellenic ...
... units: Tectomic Development of the Eastern Mediterranean Region. Geological Society, London, Special Publication, 260, 155—178. Karamata, S., and Krstić, B., 1996, Terranes of Serbia and neighbouring areas: terranes of Serbia, 25-40. Karamata, S., Korikovsky, S., and Kurdyukov, E., Prograde contact ...
... Tectonic evolution of the Drina-Ivanjica thrust sheet 0.36 180 @ 088A 0.35 -___036D + 0.34 d +006E „ 170 || 0.33 „“ __O12A _ M 0,32 ,// Z 0.31 „“ = 160 2„/ w T 0.30 }____,•'&' ., 008D __-15%, o d 0.29 đ š 150 006E i 130 135 140 145 150 155 160 165 170 088A T K/Ar ages [Ma] 29D ...Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor. "Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides" in Swiss Journal of Geosciences (2019)