Претрага
752 items
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Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia
У циљу оцене стања животне средине и разумевања потенцијалних узрока још раније евидентираног лошег хемијског статуса водног тела подземних вода „Крш–север“, извршенa je хидрогеолошка проспекција шире околине лежишта бакра Мајданпек, која је укључилаистраживање површинског копа, флотационог језера и главних карстних врела и пећина. Имајући у виду да се експлоатационо поље рудника бакра Мајданпек директно граничи са карстном издани и водним телом подземних вода „Крш–север“, параметри квалитета подземне воде су анализирани (in situ и лабораторијски) на два главна карстна врела ...Zoran Stevanović, Veljko Marinović, Branislav Petrović. "Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia" in Geoloski anali Balkanskoga poluostrva (Annales geologiques de la Peninsule balkanique), University of Belgrade, Faculty of Mining and Geology (2020). https://doi.org/10.2298/GABP201107010S
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Tracking of the temporal dependency of fading of the human footprint temperature contrast
In certain situations, it is extremely important to determine the exact time “someone” entered or crossed the forbidden zone of a military or strategic installation, a red zone of radioactive, chemical, or biological contamination, a bank or similar structure. Standard security measures include ordinary video surveillance using cameras that operate in the visible range of the electromagnetic spectrum, as well commercial thermal imaging cameras [1, 2]. The paper presents the results of experiments that suggest another possible use of ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Darko Vasiljević, Danica Pavlović. "Tracking of the temporal dependency of fading of the human footprint temperature contrast" in VIII International School and Conference on Photonics, Belgrade, Serbia, 23-27 August 2021, Institute of Physics Belgrade (2021)
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Analysis and Calculation of MMRS and Primary Gas Distribution Network in Urban Environment – Case Study Kučevo
Aleksandar Madžarević, Pavle Janković (2022)Oblast primene prirodnog gasa je veoma široka. Kao energent može se koristiti za proizvodnju energije u elektranama, toplanama i postrojenjima za kombinovanu proizvodnju energije ili za zadovoljavanje različitih toplotnih potreba u industriji i širokoj potrošnji. Gas se može upotrebiti i kao sirovina u hemijskoj i petrohemijskoj industriji, a tokom poslednjih decenija nalazi primenu i u saobraćaju kao pogonsko gorivo u SUS motorima. Sa ekološkog stanovišta, prirodni gas predstavlja najprihvatljiviji izvor energije u poređenju sa drugim fosilnim gorivima. Pri sagorevanju ...Aleksandar Madžarević, Pavle Janković. "Analysis and Calculation of MMRS and Primary Gas Distribution Network in Urban Environment – Case Study Kučevo" in Međunarodni Kongres o procesnoj industriji - PROCESING '22, Beograd : SMEITS, Društvo za procesnu tehniku (2022)
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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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Polyhedral characteristics of the cosalite-type crystal structures
Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus. "Polyhedral characteristics of the cosalite-type crystal structures" in The Canadian Mineralogist, Mineralogical Association of Canada (2019). https://doi.org/10.3749/canmin.1900017
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Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog
Maja D. Milošević (2016-12-09)Adsorpciona efikasnost različitih uzoraka glina sa lokaliteta Srbije određenaje njihovim tretiranjem različitim koncentracijama rastvora metilen plavog (MP).Detaljna mineraloška karakterizacija ispitivanih glina i rezultati njihove interakcijesa rastvorima MP dobijeni su primenom optičkih, rendgenskih, hemijskih, DTA ispektroskopskih metoda.Na osnovu formiranja MP agregata u izmenljivim pozicijama i površiničestica gline, razlikuju se dva tipa glinovitih minerala: visoko naelektrisani(smektiti) i nisko naelektrisani (kaoliniti). Dimeri se stvaraju na naelektrisanimpovršinama, a granica njihovog razvoja omogućuje determinaciju mineralne vrste.Molekuli MP stoje pod uglom od 21.5o kada se ...minerali glina, metilen plavo, kristali metilen plavog, difuznarefleksija, adsorpcija, flokulacija, naelektrisanje slojeva... e phases of methylene blue. Journal of chemical and engineering data 12: 4 Borkovec M., Wu Q., Degovics G., Laggner P. and Sticher H. 1993. Surface area and size distributions of soil particles. Colloids and Surfaces A: Physicochemical and Engineering Aspects 73: 65 - 76 Bradley D.F. and Wolf ...
... 12: 592 - 595 Li Z., Chang P.H., Jiang W.T., Jean J.S. and Hong H. 2011. Mechanism of methylene blue removal from water by swelling clays. Chemical Engineering Journal 168: 1193 - 1200 Logar M. 1996. Sistematika silikata. Autorizovana skripta, Univerzitet u Beogradu - Rudarsko-geološki fakultet ...
... Zhaohui L., Po-Hisang Ch., Wei-Teh J., Jiin-Shun J. and Hanlie H. 2011. Mechanism of methylene blue removal from water by swelling clays. Chemical Engineering Journal 168: 1193 - 1200 Zollinger H. 1987. Color Chemistry, VCH-Verlag, Weinheim, pp. 60 - 65 http://ramaseshan.com/Images/phillosilicates ...Maja D. Milošević. "Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-12-09)
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Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery
... determined according to the Casagrande method (LCPC, 1987) and calculated according to Atterberg (1911). Results and discussion Chemical composition 'The chemical composition of the CIMx indicates that the raw clay material used for the ceramic production consists mainly of AL,}O, (~16 wt.%) ...
... deposited in freshwater basins (Fig. 1, top right) (Mojsilović et al, 1971). The clay in the Dobrodo deposit does not have a uniform appear- ance and chemical composition. It is layered with clays of various colours and shades, from yellow to dark grey, due to differences in mineralogy (Milošević et al ...
... (H). The mineral phases were identified using the Rigaku PDXL software and the PDF-2 database (International Centre for Diffraction Data). The chemical com- position was determined by X-ray fluorescence (XRF) spectros- copy using a PANalytical MiniPal 4 XREF spectrometer equipped with a high- ...Maja Milošević, Biljana Đorđević, Mihovil Logar. "Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery" in Clay Minerals (2020). https://doi.org/10.1180/clm.2020.20
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Actual contamination of the Danube and Sava rivers at Belgrade (2013)
Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening... on organic compounds are presented and discussed in detail. General characterisation of the water quality The water samples investigated in this study were first characterized by some general parameters in order to reflect the general state of the water quality. As a relevant parameter, the TOC ...
... different chemical analyses can result in different assessments of the river quality. A * Corresponding author. E-mail: jan.schwarzbauer@emr.rwth-aachen.de # Serbian Chemical Society ...
... Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer | Journal of the Serbian Chemical Society | 2014 | | 10.2298/JSC131105014A http://dr.rgf.bg.ac.rs/s/repo/item/0005039 Дигитални репозиторијум Рударско-геолошког факултета Универзитета ...Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer. "Actual contamination of the Danube and Sava rivers at Belgrade (2013)" in Journal of the Serbian Chemical Society, National Library of Serbia (2014). https://doi.org/10.2298/JSC131105014A
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Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry
Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalizationSteven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti. "Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945979
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Replica of the “Great Triangle Gold Nugget” Belonging to Belgrade University Collection, Gilded or Not?
... the gold colour and shine remained the same, did not darken by the time it was assumed that the model is gilded. Material and method Chemical composition of the gypsum model surface was carried out in the Laboratory for SEM, Faculty of Mining and Geology, University of Belgrade, using ...
... r (Oxford Instruments). The small amount of the skim was gently removed from the surface and glued onto a graphite strip, without covering. Chemical analysis was performed on unpolished pieces, using the EDS detector and the internal standards. Historic background The gold nugget was ...Alena Zdravković, Maja Milošević, Ivana Jelić. "Replica of the “Great Triangle Gold Nugget” Belonging to Belgrade University Collection, Gilded or Not?" in 8th Mineral Sciences in the Carpathians Conference, Acta Mineralogica-Petrographica, Miskolc, Hungary, Department of Mineralogy, Geochemistry and Petrology, University of Szeged, Szeged, Hungary (2021)
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Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines
This paper presents the model for the identification of reference points on the lifetime curve of engineering systems. This curve commonly represents the increase and decline of failure in relation to time. A direct correlation between failure rate and costs is assumed in this paper, therefore, statistical and empirical analysis of costs provided reference points. This approach is used for positioning stages of the engineering system’s lifetime with a minimal number of failures and costs, regardless of whether these ...Electrical and Electronic Engineering,Industrial and Manufacturing Engineering, Control and Optimization, Mechanical Engineering, Computer Science (miscellaneous), Control and Systems EngineeringUgljesa Bugarić, Milos Tanasijević, Stevan Djenadić, Dragan Ignjatović, Ivan Janković. "Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines" in Machines, MDPI AG (2022). https://doi.org/10.3390/machines10110995
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Kimberlite, carbonatite, and potassic magmatism as part of the geochemical cycle
Tappe Sebastian, Pearson Graham, Prelević Dejan. "Kimberlite, carbonatite, and potassic magmatism as part of the geochemical cycle" in Chemical Geology 353, Amsterdam, Netherlands :Elsevier BV (2013): 1-3. https://doi.org/10.1016/j.chemgeo.2013.04.004
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Investigation of Bi2O3-rich part of Bi2O3–PbO phase diagram
Dapčević Aleksandra, Poleti Dejan, Karanović Ljiljana, Miladinović Jelena. "Investigation of Bi2O3-rich part of Bi2O3–PbO phase diagram" in Journal of the Serbian Chemical Society 28 no. 12, Karnegijeva 4/3, 11000 Beograd:Srpsko hemijsko društvo (2017): 1433-1444. https://doi.org/10.2298/JSC170711111D
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Constraints on the sources of post-collisional K-rich magmatism: The roles of continental clastic sediments and terrigenous blueschists
Wang Yu, Prelević Dejan, Buhre Stephan, Foley Stephen. "Constraints on the sources of post-collisional K-rich magmatism: The roles of continental clastic sediments and terrigenous blueschists" in Chemical Geology, :Elsevier BV (2016). https://doi.org/DOI:10.1016/j.chemgeo.2016.10.
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Phase composition of Bi2O3 specimens doped with Ti, Zr and Hf (Note)
Poleti Dejan, Karanović Ljiljana, Zdujić Miodrag, Jovalekić Čedomir. "Phase composition of Bi2O3 specimens doped with Ti, Zr and Hf (Note)" in Journal of the Serbian Chemical Society 77 no. 8, Karnegijeva 4/3, 11000 Beograd:Srpsko hemijsko društvo (2012): 1091-1096. https://doi.org/10.2298/JSC110914215P
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DFT study of free radical scavenging activity of erodiol
Marković Zoran, Dorović Jelena, Dekić Milan, Radulović Milanka, Marković Svetlana, Ilić Marija (2013)Marković Zoran, Dorović Jelena, Dekić Milan, Radulović Milanka, Marković Svetlana, Ilić Marija. "DFT study of free radical scavenging activity of erodiol" in Chemical Papers 67 no. 11, Slovakia:Slovak Academic Press Ltd. (2013): 1453-1461. https://doi.org/10.2478/s11696-013-0402-0
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Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija
Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić (2015)Biougalj se dobija pirolizom iz organskog otpada. Smatra se ,,modifikatorom'' zemljišta i koristi se kao đubrivo i kao rezervoar za skladištenje ugljenika. Kvantifikacija funkcionalih grupa je važna zbog hemijske reaktivnosti biougljeva koji imaju uticaj na svojstva zemljišta. U istraživanju su korišćena 3 uzorka biouglja različitog porekla i jedan referentni, aktivni ugalj. Sadržaj kiselih funkcionalnih grupa je određivan titracijom po Boehm-u na dva načina: uvođenje N2 tokom titracije i tretman sa BaCl2. Optimizovan je način pripreme tri Boehm ova rastvora ...... is a soil modifier due to its fertilizing effect and its potential for carbon storage. Quantification of functional groups is interesting because chemical reactivity of biochar can have effect on soil properties. In this researh different samples of biochar are used and one as referent sample. Oxygen ...
... of Belgrade, Studentski trg 12-16, Belgrade, Serbia *Faculty of Mining and Geology, University of Belgrade, Djusina 7, Belgrade; **Institute of general and physical chemistry, Studentski trg 12-16, Belgrade; ***Faculty of Physical chemistry, University of Belgrade, Studentski trg 12-16, Belgrade ...Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić. "Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija" in 52. savetovanja Srpskog hemijskog društva, Srpsko hemijsko društvo (2015)
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Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)
In this paper, grandite core with Grs64±1Adr36±1Sps2composition was crystallographically studied. This core represents zone A of the macroscopically visiblefive A–E zones of the optically anisotropic Grs58–64 Adr36–42Sps2 grandite. The applied procedure includes the detailed analysis of the powder diffraction patterns, and the Rietveld refinements of the crystal structures in a series of 18 space groups and two mixtures, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. Synthesis of all ...Pavle Tančić, Aleksandar Kremenović, Predrag Vulić. "Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)" in Powder Diffraction, Cambridge University Press (CUP) (2019). https://doi.org/10.1017/S0885715619000897
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Preparation, characterization and photocatalytic activity of lanthanum and vanadium co-doped mesoporous TiO2 for azo-dye degradation
Nešić Jelena, Manojlović Dragan D., Anđelković Ivan, Dojčinović Biljana, Vulić Predrag, Krstić Jugoslav, Roglić Goran (2013)Nešić Jelena, Manojlović Dragan D., Anđelković Ivan, Dojčinović Biljana, Vulić Predrag, Krstić Jugoslav, Roglić Goran. "Preparation, characterization and photocatalytic activity of lanthanum and vanadium co-doped mesoporous TiO2 for azo-dye degradation" in Journal of Molecular Catalysis A: Chemical 378, Amsterdam:Elsevier (2013): 67-75. https://doi.org/10.1016/j.molcata.2013.05.018
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Compressive strength and hydrolytic stability of fly ash based geopolymers
Nikolić Irena, Đurović Dijana, Zejak Radomir, Karanović Ljiljana, Tadić Milena, Blečić Dragoljub, Radmilović Velimir. (2013)Nikolić Irena, Đurović Dijana, Zejak Radomir, Karanović Ljiljana, Tadić Milena, Blečić Dragoljub, Radmilović Velimir.. "Compressive strength and hydrolytic stability of fly ash based geopolymers" in Journal of the Serbian Chemical Society 78 no. 6, Karnegijeva 4/3, 11000 Beograd:Srpsko hemijsko društvo (2013): 851-863. https://doi.org/10.2298/JSC121024001N