Претрага
559 items
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Low-temperature phase transition and magnetic properties of K3YbSi2O7
Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica... (7) O1v—Si1—O3 109.4 (2) �2 Symmetry codes: (i) x + 1 2, y + 1 2, z; (ii) x, �y, �z + 1; (iii) �x, �y, z � 1 2; (iv) � x � 1 2, � y � 1 2, z � 1 2; (v) x � 1 2, �y � 1 2, �z + 1; (vi) �x + 1 2, �y � 1 2, �z + 1; (vii) �x, y, �z + 3 2. Table 6 Bond valences ij (v. u.) for polymorph �0-K3YbSi2O7 ...
... 5.7274 Å, b = 9.9201 Å, c = 13.9339 Å). Atom Wyckoff site x y z Yb1 4a (0,0,0) 0 0 0.5 K1 8f (0,y,z) 0.5 0.83333 0.5918 Si1 8f (0,y,z) 0.5 0.16667 0.6322 K2 4c (0,y,14) 0 0 0.75 O1 16h (x,y,z) 0.7318 0.0894 0.5959 O1_2 8f (0,y,z) 0.5 0.3212 0.5959 O2 4c (0,y,14) 0.5 0.16667 0.75 Table 8 The di ...
... Si1—O2 1.6411 (17) O1—Si1—O1iii 110.65 (11) �3 Si1iv—O2—Si1 180.0 O1—Si1—O2 108.27 (11) �3 Symmetry code: (i) x � y, x, �z; (ii) �y, x � y, z; (iii) �x + y + 1, �x + 1, z; (iv) x, y, �z + 1 2. Table 4 Bond valence sums ij (v.u.) for the cations and anions in �-polymorph. K1a K2a Yba Sib � ij (v.u.) ...Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović. "Low-temperature phase transition and magnetic properties of K3YbSi2O7" in Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, International Union of Crystallography (IUCr) (2021). https://doi.org/10.1107/S2052520621006077
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New evidence for the use of cinnabar as a colouring pigment in the Vinca culture
Gajić Kvascev Maja, Marić Stojanović Milica, Smit Z., Kantarelou V., Karydas Andreas G., Šljivar D., Milovanović Dragan, Andrić Velibor (2012)Gajić Kvascev Maja, Marić Stojanović Milica, Smit Z., Kantarelou V., Karydas Andreas G., Šljivar D., Milovanović Dragan, Andrić Velibor. "New evidence for the use of cinnabar as a colouring pigment in the Vinca culture" in Journal of Archaeological Science 39 no. 4, London, England:Academic Press Ltd- Elsevier Science Ltd, 24-28 Oval RD, London NW1 7DX, England (2012): 1025-1033. https://doi.org/10.1016/j.jas.2011.11.023
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Attenuation of Bacteriological Contaminants in Karstic Siphons and Relative Barrier Purifiers: Case Examples from Carpathian Karst in Serbia
L. Vasić, Z. Stevanović, S. Milanović, B. Petrović. "Attenuation of Bacteriological Contaminants in Karstic Siphons and Relative Barrier Purifiers: Case Examples from Carpathian Karst in Serbia" in Hydrogeological and Environmental Investigations in Karst Systems, Springer Berlin Heidelberg (2015). https://doi.org/10.1007/978-3-642-17435-3_51
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Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells
Mirković M. Miljana, Došen, M. Anja, Erić P. Suzana, Stojmenović D. Marija, Matović Z. Branko, Rosić A. Aleksandra (2018)Mirković M. Miljana, Došen, M. Anja, Erić P. Suzana, Stojmenović D. Marija, Matović Z. Branko, Rosić A. Aleksandra. "Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells" in Science of Sintering 50 no. 1, Beograd:International Institute for the Science of Sintering, Belgrade, Serbia (IISS) (2018): 95-109. https://doi.org/10.2298/SOS1801095M
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Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells
Mirković Miljana M., Došen Anja M., Erić Suzana P., Stojmenović, Marija D., Matović Branko Z., Rosić Aleksandra A. (2018)Mirković Miljana M., Došen Anja M., Erić Suzana P., Stojmenović, Marija D., Matović Branko Z., Rosić Aleksandra A.. "Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells" in Science of Sintering 1 no. 50, Beograd:Međunarodni Institut za nauku o sinterovanju (2018): 95-109. https://doi.org/https://doi.org/10.2298/SOS180
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Centar za hidrogeologiju karsta - 15 godina nauke i struke
... Stevanović, Z., Polomčić, D., Milanović, S., Dokmanović, P. (2012): Water supplay management measures, CCWatersS - Climate Change and Impact on Water Suppbly., Edt. Stevanović Z., Ristić Vakanjac V., Milanović S.Univerzitet u Beogradu, RGF – DHG, Beograd pp. 341 – 390. Stevanović, Z., Ristić Vakanjac ...
... Milanović, S., Stevanović, Z. (2018): IIntroductory editorial Environmental Farth Science. 77: 724. https://doi.org/10.1007/s12665-018-7905-5 Chen, Z., Auler, A.S., Bakalowicz, M., Drew, D., Griger, F., Hartmamn, )., Jiang, G., Moosdorf, N., Richts, A., Stevanović, Z., Veni, G., Goldscheider, N. ...
... Nikolov), Vol. 69 (9), pp 1183-1194. Stevanović, Z. (2016): Damming underground flow to enhance recharge of karst aquifers in the arid and semi-arid worlds. Environmental Farth Science. 75:35, https://doi.org/10.1007/s12665-015-5086-z Fiorillo, F., Stevanović, Z. (2015): Introductory editorial thematic issue: ...urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović. Centar za hidrogeologiju karsta - 15 godina nauke i struke, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, Centar za hidrogeologiju karsta, 2023
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Triassic rift-type basalts and related deep-water sediments in the western ophiolite belt of the Hellenides-Dinarides (from Othrys Mts., Greece to Darno Hill, NE Hungary)
Palinkaš L., Kovacs S., Molnar F., Haas J., Jozsa S., Dosztaly L., Gulacsi Z., Kiss G., Kover S., Ozsvart P., Mikes T., Halamić J., Hravtovič H., Sudar Milan, Jovanović D., Đerić Nevenka, Migiros G, Papanikolau D., Tselepidis V. (2010)Palinkaš L., Kovacs S., Molnar F., Haas J., Jozsa S., Dosztaly L., Gulacsi Z., Kiss G., Kover S., Ozsvart P., Mikes T., Halamić J., Hravtovič H., Sudar Milan, Jovanović D., Đerić Nevenka, Migiros G, Papanikolau D., Tselepidis V.. "Triassic rift-type basalts and related deep-water sediments in the western ophiolite belt of the Hellenides-Dinarides (from Othrys Mts., Greece to Darno Hill, NE Hungary)" in Proceedings of the 19th Congress of the Carpathian Balkan Geological Association, Thessaloniki, Greece, 23-26 September 2010, (Abstract Volume), Geologica Balcanica, Sofia:Carpathian-Balkan Geological Association (2010): 285-286
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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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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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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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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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Neogena i kvartarna herpetofauna (Anura i Squamata) Srbije : doktorska disertacija
Dragana D. Đurić (2019)U radu je prvi put opisan deo herpetofaune (Anura i Squamata) iz neogenih i kvartarnih lokaliteta Srbije. Obrađeni su lokaliteti Sibnica, Prebreza, Lazarevc, Vračević i Riđake, neogene starosti. Lokaliteti kvartarne starosti su pećine Mala i Velika Balanica, Pešturina, Hadži Prodanova, Baranica, Vrelska pećina i sedimentne ispune fisura u kamenolomima Venčac i Beočin. U radu je prikazana je taksonomska analiza herpetoloških ostataka. Pored taksonomske analize fosilnog materijala dat je kratak geografsko-geološki opis proučavanih lokaliteta, osnovne osteološke karakteristike anura i skvamata ...... (RDJ), trupni pršljen dorzalno (a), ventralno (b). OPIS: Trupni pršljenovi Z. paralongissimus imaju veliki broj zajedničkih karaktera sa pršljenovima Z. longissimus (vidi Z. longissimus). Prema Szyndlar–u (1984), od Z. longissimus jasno se razlikuje po izrazito spljoštenom hemalnom grebenu, kod ...
... Szyndlar, Z. 1984. Fossil snakes from Poland. Acta Zoologica Cracoviensia, 28(1): 3– 156. Szyndlar, Z. 1988. Two new extinct species of the genera Malpolon and Vipera (Reptilia, Serpentes) from the Pliocene of Layna (Spain). Acta Zoologica Cracoviensia, 31: 687-706. Szyndlar, Z. 1991a. A review ...
... Central Balkans (pp. 21–38). Belgrade: Serbian Archaeological Society. Boev, Z. 2009. First finds of giant land tortoises discovered in Bulgaria. In: Popov, Al. S. Slavova (eds.) 2009. Новости – News 2008, BAS, 90–96. Boev, Z. 2017. Fossil and subfossil record of Reptiles (Reptilia Laurenti, 1768) in ...Dragana D. Đurić. Neogena i kvartarna herpetofauna (Anura i Squamata) Srbije : doktorska disertacija, Beograd : Rudarsko-geološki fakultet, 2019
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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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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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Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
... M., Z., Ć., G., D., R.: Routes of synthesis of nepheline-type polymorphs: An influence of Na-LTA bulk composition on its thermal transformations, Journal of Physics and Chemistry of Solids, 2013. 241. Borojević-Šoštarić S., Palinkaš L., Neubauer F., Hurai V., Cvetković V., Roller-Lutz Z., Mandić ...
... В. Драгишић В. Цветковић, О. Крунић, П. Папић, З. Никић 203. Живановић Ј. Владимир 27.06.2011. Оцена рањивости подземних вода од загађења на примерима карста Србије Хидрогеологија В. Драгишић С. Вујасиновић, З. Стевановић, З. Никић 204. Загорац Б. Јелена 26.12.2011. Синтеза ...
... примјерима из слива Скадарског језера ДАХГ/ДАХГ З. Стевановић В. Драгишић, И. Јемцов, В. Ристић, З. Никић, 2. Врањеш Ана 12.12.2012. Хидрогеотермални ресурси територије града Београда ДАХГ/ДАХГ Д. Миленић М. Јовановић Поповић, М. Коматина, З. Стевановић, Д. Шумарац, В Драгишић, 3 ...главни и одговорни уредник Душан Поломчић. Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
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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