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Упит dcterms_subject_txt:Fluid Flow and Transfer Processes

2351 items

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Karstification depth and storativity as main factors of karst aquifer regimes: some examples from southern Alpine branches (SE Europe and Middle East)

    Zoran Stevanović, Vesna Ristić-Vakanjac, Saša Milanović, Ljiljana Vasić, Branislav Petrović, Marina Čokorilo-Ilić (2015)
    Earth-Surface Processes,Geology,Pollution,Soil Science,Water Science and Technology,Environmental Chemistry,Global and Planetary Change

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    ... sys- tems, neurological impacts, and skin and other cancers [12]. First of all, toxic arsenic compounds act on the nervous sys- tem and blood vessels, causing paralysis of the capillaries. As a result of the interruption of blood flow and neural processes occurring, pathological changes in heart, liver, ...
    ... skin, and nails occur. Arsenic is a pro- toplasmic poison with a pronounced effect on oxidative processes in the cell. Inorganic As(III) and As(V) are the main forms of arsenic present in natural waters, followed by their methylated forms [13]. It is especially important to determine the source and mobility ...
    ... this study, and consequently with higher estimated toxic and carcinogenic risk should be con- nected to the new treatment for water supply. The minimum As water gave HQ and R values of 0.29 and 0.13 per 1,000 persons, respectively, and the maximum As water resulted in HQ and R of 5.72 and 2.6 per 1,000 ...

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... a rank order of alternatives. Multi-criteria ranking method PROMETHEE introduces qualities of positive, negative and net flow [29]. The results obtained from positive, negative and net flow are presented in Table 11. Table 11. PROMETHEE flows. Alternatives Ph+ Ph− Ph A1 0.4019 0.2155 0.1864 A2 0.3157 ...
    ... based on net flow Phi. The upper half of the given scale (colored in green) represents positive Phi value, and the lower half (red) represents negative Phi value. Alternative A3 (Žitkovac) is at the top of the analyzed alternatives, preceding A4 (Tvrd̄anski Do), while A2 (Gornje Polje) and A5 (Bostanište) ...
    ... corresponds to Phi net flow. A cone is drawn for every alternative. Cones A2 and A5 overlap, which indicates that these two alternatives are closely congruent, while the alternative A2 has the advantage in partial ranking PROMETHEE I. The highest priority alternative is A3 (Žitkovac), and the lowest is alternative ...

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... generation and the preview of the report. Reporting and reviews on maintenance enable insight into operative readiness and circumstances and condition of production and other equipment, performed maintenance works, maintenance costs and other reviews based on available data. These processes require ...
    ... delineation, development, production and waste management. Design and planning of these processes in the future needs to be closely integrated into more holistic mining systems, considering all controlling factors and impacts (technical, economic, environmental and social). It is crucial for the mining ...
    ... spare parts and intermediate goods management which provides necessary spare parts. This enables timely and reliable decisions to be made on: plan of preventive maintenance and parameters for defining the schedule of the planned maintenance; processes based on the course of work and in such a way ...

  • Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu (2020)
    Geochemistry and Petrology

  • Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes

    Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović (2016)
    menadžment, rudrastvo i energetski kompleksi, okruženje, održivi razvoj, mrežno planiranje
    ... pond leachate 3 2 0 + 0 + 1 + 1 + 0 + 1 18 12 Presence of dust and coal at loading sites 5 2 1 + 1 + 0 + 1 + 0 + 1 40 13 Irregular dust settling at transfer points 5 2 1 + 1 + 0 + 1 + 0 + 1 40 14 Exhaust and dust emission during loading and unloading of coal 5 2 1 + 1 + 0 + 1 + 0 + 1 40 15 Exhaust emission ...
    ... through the realization of management goals and management processes. The goal of implementation is to meet the requirements by standards and stakeholders, while providing conditions for continuous improvement of the environmental management system of mining and energy complexes. The utilization of the ...
    ... an effective and efficient model for the purposes of environmental management system improvement in mining and energy complexes. The results obtained in this research form a basis for the improvement of the following processes: identification of interdependence aspects in the mining and energy complexes ...

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)

  • 3D Terrestrail Laser scanning and GPS Technology for slope stability investigations-case studies

    Abolmasov Biljana, Pejić Marko (2012)

  • 3D Terrestrail Laser scanning and GPS Technology for slope stability investigations-case studies

    Abolmasov Biljana, Pejić Marko (2011)

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... membrane and its mass transfer related. Journa/ of alloys and compounds, 509(2), p.354-361. [207] Ambare, D.N., Ansari, S.A., Anitha, M., Kandwal, P., Singh, D.K., Singh, H. and Mohapatra, P.K., 2013. Non-dispersive solvent extraction of neodymium using a hollow fiber contactor: Mass transfer and modeling ...
    ... through sequential chemical roasting, water leaching, and acid leaching processes. Journa! of Cleaner Production, 284, p.124725. [179] Demol, J., Ho, E. and Senanayake, G., 2018. Sulfuric acid baking and leaching of rare earth elements, thorium and phosphate from a monazite concentrate: Effect of bake ...
    ... McLean, D.D.L. and Kates, M., 2003. Biodiesel production from waste cooking oil: 1. Process design and technological assessment. Bioresource technology, 89(1), p.1-16. [183] Sadri, F., Nazari, A.M. and Ghahreman, A., 2017. A review on the cracking, baking and leaching processes of rare earth element ...

  • Possibilities for Reduction of Energy-Related Air Pollution in Serbia - Exploring Energy Scenarios

    Marija Živković, Boban Pavlović, Dejan Ivezić, Aleksandar Mijatović (2023)
    Fossil fuels and biomass account for almost 93% of the total primary energy supply in Serbia. Meeting the energy needs of consumers implies a transformation of the chemical energy of fuels through combustion processes to obtain heat that can be utilized as such, or further transformed into mechanical or electrical energy. These processes have an undeniable impact on air pollution, even in cases of biofuels or hydrogen combustion. Possibilities for air pollution reduction are identified, both on the supply ...
    загађење ваздуха, сценарији енергетског развоја, Србија

  • Landslide Umka-the first automated monitoring project in Serbia

    Abolmasov Biljana, Milenković Svetozar, Jelisavac Branko, Vujanic Vladeta (2012)

  • Landslide Umka-the first automated monitoring project in Serbia

    Abolmasov Biljana, Milenković Svetozar, Jelisavac Branko, Vujanić Vladeta (2011)

  • Genesis and circulation of fresh and thermal groundwater flows in same karstic aquifer - Case examples from the Carpathian karst of eastern Serbia

    Vasić Ljiljana, Milanović Saša, Stevanović Zoran (2013)

  • 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
    ... measurements could be performed. Substitution reactions of [(TLtBu)PdCl]+ and [Pd(tpdm)Cl]+ complexes were initiated by mixing equal volumes of complex and ligand solutions directly in the stopped-flow instru- ment and the reaction was followed for at least eight half-lives. The substitution process was monitored ...
    ... s could be performed. Substitution reactions of [(TL®")Pdcl]* and [Pd(tpdm)Cl]* complexes were initiated by mixing equal volumes of complex and ligand solutions directly in the stopped-flow instru- ment and the reaction was followed for at least eight half-lives. The substitution process was monitored ...
    ... NaClO4 aqueous solution in the presence of 10 mM NaCl. The reactions were carried out at three different temperatures (288, 298 and 308 K) using a variable-temperature stopped-flow technique. The substitutions were followed under the pseudo-first-order conditions with a large excess of nucleophiles. Obtained ...

  • Knowledge and Rule-Based Diacritic Restoration in Serbian

    Cvetana Krstev, Ranka Stanković, Duško Vitas (2018)
    In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).
    diacritic restoration, morphological dictionary, corpus, word n-grams, local grammars
    ... ls, but also to ordinary people (Loukachevitch and Dobrov, 2015). Thus, this thesaurus contains im- portant knowledge for processing news flow, legal documents, and developing new domain-specific resources. The Sociopolitical thesaurus can exist and be used separately. At the same time it is included ...
    ... Automatic Document Processing for Text Analytics The main stages of thesaurus-based document processing include: • Tokenization and lemmatization, that is, the transfer of word forms to dictionary forms (lemmas); • Matching with the thesaurus based on the lemma representation of the document. Multiword ...
    ... because scientific and technological problems can be discussed together with political, economical, indus- trial, and other issues (Dobrov and Loukachevitch, 2006); • Security Thesaurus is an extension of the RuThes thesaurus and includes terminology related to social, national and religious conflicts ...

  • Hydrochemical impact of the hydraulic tunnel on groundwater in the complex aquifer system in Pirot, Serbia

    Marina Ćuk, Igor Jemcov, Ana Mladenović, Marina Čokorilo Ilić (2020)
    Hidrogeohemijski procesi, hidrohemijske promene, karstna izdan, tunel pod pritiskom, multivarijantne statističke analize

  • Cytotoxic activity of tetradentate Schiff Base Copper(II) complexes

    Nevenka Gligorijević, Aleksandar Mijatović, Sandra Aranđelović, Rada Baošić (2021)
    Istraživanje kompleksa bakra kao potencijalnih antikancerogenih agenasa nudi ohrabrujuće perspektive u odnosu na komplekse platine (II) računajući na smanjenu toksičnost, novi mehanizam delovanja, različit spektar aktivnosti i perspektivu neunakrsne rezistencije. Kompleksi Šifovih baza bakra(II) koji sadrže tetradentatne ligande acac2en tipa (acac2en (1); tfacac2en (3), acactfacacen (4), acacphacacen (6)) pokazali su važnu antioksidativnu aktivnost, visok potencijal za interakciju sa HSA i DNK, u prethodnim studijama. Zbog toga je bilo interesantno ispitati i uporediti potencijal antikancerogene aktivnosti in vitro, u odnosu ...
    Bakar(II) kompleksi, citotoksičnost, ćelijski ciklus

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... JD. 1992. The Chemical Thermodynamics of Actinide Elements and Compounds. The Actinide Aqueous Inorganic Complexes. IAEA, Wien. 49. Garven G. 1995. Continental-Scale Groundwater Flow and Geologic Processes. Annual Review of Earth And Planetary Sciences 23: 89 – 118. 50. Goldscheider N, Mádl-Szőnyi ...
    ... contamination in the Mid-Atlantic region. USGS, Baltimore. 52. Griffioen J, Kruseman JP. 2004. Determining hydrodynamic and contaminant transfer parameters of groundwater flow. In: Kovalevsky VS, Kruseman GP, Rushton KR (eds.). Groundwater Studies. An international guide for hydrogeological i ...
    ... Hem JD. 1992. Study and interpretation of the chemical characteristics of natural water. 3rd. USGS, Dallas. 62. Hermann J, Spandler C, Hack A, Korsakov AV. 2006. Aqueous fluids and hydrous melts in high-pressure and ultra-high pressure rocks: implications for element transfer in subduction zones ...