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Упит dcterms_subject_txt:Optical and Magnetic Materials

2366 items

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

  • Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu

    Nikoleta Aleksić (2021)
    ... isomers and their mutagenic activities, Chemosphere, 104 228-23. [6] Takamura-Enya, T., Suzuki, H, Hisamatu, Y. (2006) Mutagenic activities and physicochemical properties of selected nitrobenzanthrones, Mutagenesis, 21(6), 399-404. [7] Onchoke, KK. (2011) DFT/TD-DFT Investigation of Optical Absorption ...
    ... Milićević, T. 2018. Doctoral dissertation: An integrated approach to the investigation of potentially toxic elements and magnetic particles in the soil−plant−air system: bioavailability and biomonitoring, Major scientific field: Chemistry; Specific scientific field: Environmental chemistry, UDC number: ...
    ... toxic elements and magnetic particles in vineyard through the entire grapevine season. Ecotoxicol. Environ. Saf. 163, 245–254. [5] Milićević, T., Aničić Urošević, M., Vuković, G., Škrivanj, S., Relić, D., Frontasyeva, M.V., Popović, A. (2017b). Assessment of species-specific and temporal variations ...

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... suitable size) and market demand (Luodes et al. 2000). Despite the fact that concrete and glass were the prin- cipal materials in architectural design during the 1970s and 1980s, in the last three decades, the demand for dimension stone has continuously increased (Siegesmund and Sneth- lage ...
    ... area of approximately 0.12 km? (Živković and Paunović 2000). Materials and methods Carbonate rocks collected from four different locations in Serbia (quarries: Klisura, Skrzut, Struganik, and Tisnica) have been used to characterize the petrographic and tech- nical properties of dimension stone ...
    ... of these countries also import considerable quantities of raw materials and semi- finished products and are positioned as leading importers on the world stone market. The high production and processing capacities, along with low labour costs, in countries such as China, India, Brazil, or South ...

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... brittle and brittle-viscous composi- tion, respectively. 3.3. Model materials and scaling In our models, the brittle layer consists of dry quartz sand with a bulk density of ρ = 1500 kg/m3, a cohesion of 10–40 Pa and coefficients of friction of 0.63, 0.48 and 0.52, representing peak, dynamic and reac- ...
    ... Kapitan-Dimitrievo pluton and the Maritsa shear zone (Central Bulgaria): magnetic and visible fabrics analysis. Int. J. Earth Sci. 101, 747–759. Hirth, G., Teyssier, C., Dunlap, W.J., 2001. An evaluation of quartzite flow laws based on comparisons between experimentally and naturally deformed rocks ...
    ... scaling, materials and quantification, with an application to subduction experiments. J. Geodyn. 100, 7–32. Schmid, S.M., Bernoulli, D., Fügenschuh, B., Matenco, L., Schefer, S., Schuster, R., Tischler, M., Ustaszewski, K., 2008. The Alpine–Carpathian–Dinaridic orogenic system: correlation and evolution ...

  • Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu

    Marija D. Prekajski (2014-04-04)
    Nanoprahovi kristalnih faza iz serije čvrstih rastvora u pseudo-binarnom sistemuCeO2-Bi2O3 sintetisani su primenom jednostavne i ekonomične samopropagirajućemetode na sobnoj temperaturi korišćenjem nitrata metala i natrijum-hidroksida kaopolaznih supstanci. Osim krajnjih članova niza, CeO2 i niskotemperaturne polimorfnemodifikacije α-Bi2O3, sintetisani su i čvrsti rastvori nominalnog sastava Ce1-xBixO2-δ,gde je x = 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7; 0,8; 0,9. Rezultati proučavanja metodomrendgenske difraktometrije na polikristalnom materijalu i ramanske spektroskopskeanalize pokazali su da su sintetisani prahovi sa nižim sadržajem bizmuta (x = 0,1 ...
    nanostrukturni materijali, čvrsti rastvori, CeO2, Bi2O3, rendgenskadifraktometrija praha, Ritveldova metoda, mikrostrukrurna analiza

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions

    Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)
    A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...
    Ceria, Yttrium, Solid solution, Mechanosynthesis, Oxygen vacancy, Nanocrystalline material

  • Kristalne strukture Cs2HoSi4O10F i Cs2TmSi4O10F

    Predrag Dabić, Sabina Kovač, Aleksandar Kremenović (2021)
    ... compounds were synthesized by the method of crystal growth from a high-temperature solution (Tmax = 1373 K) using REE2O3 (REE = Ho, Tm), SiO2 and CsF as starting materials. The crystal structures of both compounds were determined by single-crystal X-ray diffraction analysis. They represent mutually isostructural ...
    ... OF Cs2HoSi4O10F AND Cs2TmSi4O10F P. Dabi a, S. a, A. Kr a a bia e-mail: predrag.dabic@rgf.bg.ac.rs During investigation focused on the synthesis of new potassium rare-earth elements silicates two compounds with a previously unknown chemical composition - Cs2HoSi4O10F and Cs2TmSi4O10F ...
    ... Cs2YSi4O10F [1] and Cs2ErSi4O10F [2]. The crystal structure of these compounds consists of multiple chains of SiO4-tetrahedra connected by infinite one-dimensional chains of REEO4F2-octahedra. Cesium cations are located in tunnels formed by condensation of the tetrahedral network and octahedral chains ...

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... deposits exploited in Poland, Slovenia and Serbia, which represent various lithotypes, ages and burial histories. GHG production was studied along with a range of physical and chemical parameters that are crucial for microbial growth and activity. 2. Materials and methods 2.1. Sampling sites Lignites ...
    ... suggested that detroxylytic and xylodetritic lig- nites have a higher CO2-binding capacity than xylitic ones (Bielowicz and Baran, 2019). The reason may be that the xylite-rich materials have massive structure (Widera, 2016b) with remarkably lower poros- ity (Bielowicz and Baran, 2019) thus providing ...
    ... 3). TheNMDS ordination plot, based on the physical and chemical prop- erties of lignites, shows that there was significant separation among the samples (Fig. 4). This confirms that the studied materials created dis- tinct environmental niches and points to the fact that the indigenous microbial communities ...

  • Substitution reactions of some novel sterically hindered monofunctional Pd(II) complexes

    Aleksandar Mijatović, Jovana Bogojeski, Biljana Petrović, Živadin D. Bugarčić (2011)
    Reakcije supstitucije monofunkcionalnih kompleksa [(TLtBu)PdCl]+ i [Pd(tpdm)Cl]+, gde je TLtBu = 2,6-bis[(1,3-di-terc-butilimidazolin-2-imino)metil]piridin i tpdm = terpiridindimetan, sa nukleofilima kao što su: tiourea, I−, Br−, NO2−, piridin i dimetil-sulfoksid (DMSO) proučavani su u 0,1 M vodenom rastvoru NaClO4 u prisustvu 10 mM NaCl. Reakcije su sprovedene na tri različite temperature (288, 298 i 308 K) korišćenjem tehnike zaustavljenog protoka na različitim temperaturama. Reakcije supstitucije su praćene pod uslovima pseudo prvog reda sa velikim viškom nukleofila. Dobijeni rezultati pokazuju da kompleks ...
    Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
    ... [Pd(tpdm)Cl]+ [23,24]. We studied and report here complex formation of [(TLtBu)PdCl]+ and [Pd(tpdm)Cl]+ with different nucleophiles (Fig. 1) in 0.1 M NaClO4 aqueous solution and in the presence of 10 mM NaCl to prevent spontaneously hydrolysis. 2. Experimental 2.1. Materials and methods The ligands thiourea ...
    ... [Pd(tpdm)Cl]* [23,24]. We studied and report here complex formation of [(TL")PdCl]* and [Pd(tpdm)Cl]* with different nucleophiles (Fig. 1) in 0.1 M NaClO,4 aqueous solution and in the presence of 10 mM NaCl to prevent spontaneously hydrolysis. 2. Experimental 2.1. Materials and methods The ligands thiourea ...
    ... 21,22] and with the aim to contribute towards our previously publishedwork, we synthesized novel tridentate nitrogen-donor li- gands TLtBu = 2,6-bis[(1,3-di-tert-butylimidazolin-2-imino)methyl] pyridine and tpdm = terpyridinedimethane and the corresponding Pd(II) complexes, [(TLtBu)PdCl]+ and [Pd(tpdm)Cl]+ ...

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... rudstone microfacies are characterized by loss of stone materials in forms of surface recession and outburst, while grainstone microfacies is marked by relief loss of stone materials and detachment of crust following by granular disintegration and flaking. If we compare lithological maps with damage ...
    ... prolonged periods, repeating of cycles of dissolve, wetting-drying and freeze-thaw caused continual increas- ing intensities of decay and very heavy damage in different forms of loss of stone materials (surface recession, relief, and outburst). The present state of the gate is result of the complex ...
    ... brethane — a report of an 18-year review of brethane-treated sites. In: Fidler J (ed) Stone: stone building materials, construction, and associated component systems: their decay and treatment, english heritage research transactions. 2. James & James, London, pp 3-18 6193 Massa S, Naldini ...

  • Geotehnički efekti razaranja komunalnog otpada različitim postupcima zbijanja

    Jovana M. Janković Pantić (2022)
    Odlaganje otpada na komunalne deponije predstavlja osnovni način zbrinjavanja otpada u Srbiji. Kako bi se prostor za deponovanje materijala racionalno koristio potrebno ga je svakodnevno zbijati sa unapred definisanom količinom vode koja se dodaje. Dobro zbijeni komunalni otpad zauzima manju zapreminu i omogućuje sigurnije skladištenje, pa je korisno prethodno laboratorijski odrediti parametre zbijanja: maksimalnu suvu zapreminsku težinu (dmax) i optimalnu vlažnost (wopt). U Srbiji do sada nisu određivani parametri zbijanja, dok je u svetu primenjivana standardna metoda (Proktorov opit) ...
    komunalna deponija, zbijanje, Proktorov opit, malj sa šiljcima, koeficijent razaranja

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... adhesives, and cellulose film coatings (Cadogan and Howick 2012). Sources of phthalates in the environment are direct (production of plastic materials) and indirect emission (leaching and volatilization from plastic products after their usage, disposal, and incineration). Because of that, urban and industrial ...
    ... raw materials of Serbia are clasified as: 1) Mineralraw materials of primary economic significance: copper, gold, lead-zinc and silver, magnesite, minerals for cement industry, ceramic and refractory clays, aggregate rocks, bentonite, limestone and dolomite as chemical rocks, marble and other ...
    ... preservation and sustainable management of environmental capacities, particularly by reduced utilization of raw materials and energy and prevention or reduction of environmental pollution via economic instruments and other measures, by the best available techniques, facilities and equipment which ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... differential thermal and thermogravimetric analysis (DTA/TGA), and scanning electron microscopy (SEM). 2. Materials and Methods A total number of 43 bacterial isolates (I1-I3; II1-II10; III1-III20; IV1-IV10) from soil samples were analyzed and characterized as alkaline-adapted and sporogenic bacteria ...
    ... matrix, etc. Supplementary Materials: The supplementary materials are available online at https://www.mdpi. com/article/10.3390/microorganisms9081691/s1. Table S1: Standard Score Analyses Database, Table S2: The “goodness of fit” tests for Urea concentration, pH value and cell concentration prediction ...
    ... bacteria can modify soil characteristics resulting in stabilization from the action of wind and water erosion [3], removing heavy metals from wastewaters [4], or promoting the self-healing effect of calcareous materials [5]. The water absorption of the monumental limestone was reduced by 60% after the MICP ...

  • Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia

    Maja Milošević, Mihovil Logar, Biljana Đorđević (2021)
    ... discovery of new techniques and production processes, the old ways, already adopted and mastered continued to live and actively coexist until today. This also brings a rise in imitations of pottery manufacture. The village of Zlakusa lacks proper materials, thus the raw clay originates ...
    ... electric drive) marked as -4- and by moulding (application of a mould) marked as -5-. Close examination of surface features and morphology was conducted to determine the characteristic attributes for a specific technique. Phase and mineral composition, texture, and structure of the samples ...
    ... surface colour, the appearance of bumps and bulges, horizontal lines or their absence, smooth surface and the presence of irregularities are the main indicators for assessing differences in the production of vessels. The maximum temperature, heating mode and oxidation atmosphere in the ovens were ...

  • Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics

    Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić (2024)
    Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...
    Lecki vulkanski kompleks, andeyit, kalcedon, kvarc, opal-CT, mikrostruktura, organska materija

  • Geopolymer materials based on the electric arc furnace slag

    Nikolić Irena, Častvan Janković Ivona, Radmilović Vuk, Karanović Ljiljana, Marković Smilja, Mentus Slavko, Radmilović Velimir (2013)

  • Titanium oxyde-Materials for greener environment - Оксиди титана-Материјали за здравију животну средину

    Veljković Ivana, Poleti Dejan, Karanović Ljiljana, Simičić Miloš, Zdujić Miodrag, Jovalekić Čedomir (2010)

  • BST Ceramics Obtained by Hydrothermally Assisted Complex Polymerization Method

    Ćirković Jovana, Vojisavljević Katarina, Vulić Predrag, Dojčinović Biljana, Branković Zorica, Srećković Tatjana, Branković Goran (2015)