Претрага

Упит dcterms_subject_txt:organic matter

142 items

  • Petrographical and organic geochemical study of the subbituminous coal from the Dubrava field, Aleksinac basin (Serbia)

    Željana Sekulić, Ksenija Stojanović, Achim Bechtel, Reinhard Sachsenhofer, Miomir Petrović, Ivan Kojić, Dragana Životić (2019)
    ... oil shale package. Since vitrinite reflectance (%Rr, 0.44 + 0.03 - 0.46 + 0.02) and biomarker compositions indicate the same maturity stage of organic matter (OM), corresponding to late diagenesis and early catagenesis, petrographic data, biomarker proxies and stable carbon isotope ratios (6'3) of ...
    ... Измењено: 2023-10-14 04:34:26 Petrographical and organic geochemical study of the subbituminous coal from the Dubrava field, Aleksinac basin (Serbia) Željana Sekulić, Ksenija Stojanović, Achim Bechtel, Reinhard Sachsenhofer, Miomir Petrović, Ivan Kojić, Dragana Životić ...
    ... Životić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Petrographical and organic geochemical study of the subbituminous coal from the Dubrava field, Aleksinac basin (Serbia) | Željana Sekulić, Ksenija Stojanović, Achim Bechtel, Reinhard Sachsenhofer, Miomir Petrović ...

  • Ventex: an expert system for mine ventilation systems analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    roblems relating to mine ventilation systems analysis are usually of a very complex nature. They involve the estimation of numerous interdependent parameters pertaining to the network status, ventilation status, ventilation system stability, air current losses, climate conditions, gas state, fire risk and dangerous dust pollution risk. The solution to these problems relies, to a great extent, on numerical methods. With the development of computer technology these methods were incorporated as numerical routes in software packages, such as the mine ...
    expert system, mine ventilation

  • An integrated study of thermal treatment effects on the microstructure and magnetic properties of Zn-ferrite nanoparticles

    Antić Bratislav V., Perović Marija, Kremenović Aleksandar, Blanuša Jovan L., Spasojević Vojislav V., Vulić Predrag, Bessais Lotfi, Božin Emil S. (2013)

  • Upper Cretaceous scaglia type limestone from Klepa Mts. (North Macedonia) - sedimentology and biostratigraphy

    Violeta Gajić, Milena Dunčić, Ana Mladenović, Dejan Prelević (2024)
    The research area is located in the central part of North Macedonia, in the area of the Klepa Mts. Based on sedimentological, micropaleontological and biostratigraphical investigations of samples from both the east and west side of the Klepa Mts., sedimentary rocks of the Upper Creaceous age are determined. During the latest Cretaceous, this area was dominated by the sedimentation of dominantly carbonate rocks with variable amounts of clastic components. From the tectonic point of view, investigated area belongs to the ...

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography

  • The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia

    I. Kojic, J. Kus, D. Zivotic, K. Stojanovic (2021)
    ... l environment of organic matter (OM). Lignite samples were collected from the 2nd Miocene Seam Horizon or its equivalent of Piskowitz (Lower Miocene) and Welzow-Süd (Middle Miocene) open-cast mines (Kus et al., 2020). The contents of moisture, ash, sulphur, and total organic carbon (TOC) were ...
    ... and Middle Miocene Lignites from the Coal-Mining District of Lusatia | I. Kojic, J. Kus, D. Zivotic, K. Stojanovic | 30th International Meeting on Organic Geochemistry (IMOG 2021) | 2021 | | 10.3997/2214-4609.202134092 http://dr.rgf.bg.ac.rs/s/repo/item/0005696 Дигитални репозиторијум Рударско-геолошког ...
    ... open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 30th International Meeting on Organic Geochemistry (IMOG) 12–17 September 2021, Montpellier, France THE POTENTIAL OF BIOMARKERS TO DISTINGUISH LOWER AND MIDDLE MIOCENE LIGNITES FROM ...

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • Effect of natural gas composition on methane number: A case of gas reservoirs in Serbia

    Marija Živković, Milica Ivić, Dejan Ivezić, Aleksandar Madžarević (2017)
    Natural gas is considered as the most environmentally acceptable fossil fuel, thus it is an alternative to petroleum derivate, dominantly used in internal combustion engines. Physical properties of a fuel as well as behavior during combustion process are affected by its composition. This article presents analysis of effect of natural gas composition on methane number (MN), conducted for natural gas deposits in Serbia. For empirically determination of MN: California air resources board (CARB) method and Linear and Anstalt für ...
    Састав, метански број, природни гас

  • Age And Mode of the Middle Miocene Marine Flooding of the Pannonian Basin—Constraints from Central Serbia

    Oleg Mandic, Ljupko Rundić, Stjepan Ćorić, Ðurðica Pezelj, Dörte Theobalt, Karin Sant, Wout Krijgsman (2019)
    The timing and mode of the marine flooding of the southern margin of the Pannonian basin in SE Europe is still a matter of debate. In central Serbia, integrated bio-magnetostratigraphic data and quantified high-resolution records are completely missing. Here, we provide paleoenvironmental and paleoecological constraints from the Slanci section located near Belgrade that has an excellent preservation of micro-fauna and flora, i.e., planktonic and benthic foraminifera and calcareous nannoplankton. We integrate their quantified records with sedimentological, natural gamma radioactivity ...
    Srednji miocen, morska transgresija, Panonski basen, područje Beograda

  • Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)

    Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...
    ... selected samples showed high content of total organic carbon (TOC > 13 wt. %), high hydrocarbon generation potential (Hydrogen Index, HI > 615 mg hydrocarbons/g TOC), but also certain variations in sources and depositional environment of organic matter (sample D13 - type I kerogen, deposited in ...
    ... also depends on the kerogen precursor material. The prevalence of lower homologues in LPs is consistent with the predominantly algal origin of organic matter (OM) (Gajica et al., 2017). The n-alkane distributions in all LPs are characterized by uniform abundances of odd and even homologues, resulting ...
    ... Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović | 30th International Meeting on Organic Geochemistry (IMOG 2021) | 2021 | | 10.3997/2214-4609.202134040 http://dr.rgf.bg.ac.rs/s/repo/item/0005555 Дигитални репозиторијум Рударско-геолошког ...

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... kerogen type in humic coal [26]. In organic geochemical investigations, different pyrolytic methods are also widely used for estimation of the origin, type/quality, depositional environment, maturity, and hydrocarbon generation potential of sedimentary organic matter (OM) in the oil shale, coal, and source ...
    ... the Western Canada Basin: Relation of the aromatic dis-tribution pattern to maturity of organic matter. Geochim. Cosmochim. Acta 1982, 46, 1–10. [CrossRef] Polymers 2021, 13, 759 25 of 25 75. Radke, M. Organic geochemistry of aromatic hydrocarbons. In Advances in Petroleum Geochemistry; Radke, M. ...
    ... m from teabag waste with simultaneous production of valuable solid and gas products [24]. The hydrocarbon generation potential of sedimentary organic matter (OM) depends on its quantity, quality/type, and maturity. The most important factor controlling the potential of OM of sedimentary rocks to produce ...

  • Spatial distribution of major and trace elements in artificial lakes in Serbia: health risk indices and suitability of water for drinking and irrigation purposes

    Goran Marković, Aleksandar Ž. Kostić, Nebojša Đ. Pantelić, Radojka Maletić, Jana Štrbački, Jovan Cakić, Lazar Kaluđerović, Biljana P. Dojčinović, Angelo Maria Giuffrè, Jelena B. Popović-Djordjević (2023)
    Lakes and reservoirs are the main water resources for household, irrigation, and industrial use. Hence, it is necessary to control water pollution and have reliable information on water quality, which refers to its suitability for a particular purpose. The main objective of this study was to evaluate the suitability of water for drinking and irrigation purposes from ten artificial lakes on the territory of the Republic of Serbia. The physicochemical parameters were determined using standard analytical methods, whereas the ...
    Management, Monitoring, Policy and Law, Pollution, General Environmental Science, General Medicine

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia
    ... energy related nitrogen oxide emissions and is an important source of primary particulate matter. The buildings sector also receives attention since it is responsible for the highest shares of particulate matter and carbon dioxide at a global level (Figure 1) 4.Thus, cities could become pollution hotspots ...
    ... air pollutants and their sources, 2015 Q B, Export POF . © Bl Energy and Air Pollution: a QO) “pe sulfur Nitrogen _ Particulate Carbon _Volatile organic B creneror vy BA toenont dioxide oxides matters; monoxide compounds Ammonia ASS By ctonedgemens : 1 oe Lites >99% >99% 85% 92% 66% 3% Bi execute ...
    ... inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. It is estimated that 85% of particulate matter and almost all of the sulfur oxides and nitrogen oxides are consequences of combustion processes 4. These pollutants are responsible for the most of ...

  • 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
    ... , 2020). In the case of hard coals, which are resistant to biodegradation, these calcu- lations are justified. However, bioavailability of the organic matter for microbial processes increases with decreasing thermal maturity (Robbins et al., 2016) and in the case of brown coal, particularly lig- nite ...
    ... biological de novo formation of GHG. The coal seams were shaped by an anaerobic environment in which it was possible to conserve the deposited organic matter. In the course of exploitation, lignite deposits are drained and exposed to atmospheric conditions. Such a drastic change in the living conditions ...
    ... relationship, however, was not noted in the results presented here. Among the studied samples, the most mature were lignites from the Turów mine. Organic matter accumulated in this coal basin is subjected to considerable geothermal heating (Liber-Makowska, 2013) which results e.g., in higher (in comparison ...

  • Environmental Energy Security Indicators as Tools for Environmental Protection

    Aleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević (2019)
    Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...
    енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивост
    ... leads to the emission of particles. The particles further initiate the binding of other matter to the atmosphere, affecting the formation of smog in the lower atmosphere [20]. How much particulate matter will be emitted into the atmosphere depends primarily on the type of energy used and the sector ...
    ... required, so the amount of CO2eq emitted can be obtained. 3.2 Partial indicator Emission of pollutants Emission of pollutants (particulate matter, NOx, SOx, CO, VOC, etc.) is a partial indicator describing the type, intensity and mode of emission of the remaining pollutants (excluding the ...
    ... emissions, Environmental Science Technology 2010, Volume 4, pp. 450-456 21. Jovašević-Stojanović, M., Bartonova, A., Current State of Particulate Matter Research and Management in Serbia, CICEQ, Volume 16 , 2010, pp. 207-212 22. Djukić P., Djukanović S., (2015), Održivi razlozi: ekonomsko-ekološki ...

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove ...
    Grejanje, Analiza životnog ciklusa, Drvna biomasa, Individualni sistemi grejanja
    ... be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different ...
    ... common practice within European countries [3]. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter, i.e., three times more than road transport in the European Union (EU) [4]. 1 Junior Research ...

  • Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides

    Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević (2021)
    ... The mineralogical composition of the soil clay fraction, along with soil organic matter, plays an important role in the sorption process of the soil. However, natural clay minerals are much better sorbents of inorganic than organic contaminants, such as nonionic pesticides. On the other hand, due to the ...
    ... increment in S-metolachlor sorption with increasing the content of the organic complex used in the montmorillonite modification. Positive relationship between the parameter Kf and the content of the organic complex was found. A general trend of sorption can be presented ...
    ... procedures. In this paper, montmorillonite samples from Bogovina (Serbia) were pretreated with 1M NaCl, and then with different concentrations of two organic complexes (HDTMA, PTMA). Chemical analysis of the sample showed that natural montmorillonite from Bogovina (Serbia) was Ca montmorillonite.  The whole ...

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...
    Šifove baze, Lipofilnost, RP-TLC, Organski modifikatori