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Упит dcterms_subject_txt:Provenance studies

377 items

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... are upgraded methods in terms of their simplicity, recyclability and mode of waste recovery from the pollutants [18,20]. In recent years, a lot of studies have been performed with aim of the selection and/or production of low-cost adsorbents with good adsorption capacities for both organic and inorganic ...
    ... shell as a new low-cost adsorbent. Korean J. Chem. Eng. 2011, 28, 149–155. [CrossRef] 12. Mittal, A.; Malviya, A.; Kaur, D.; Mittal, J.; Kurup, L. Studies on the adsorption kinetics and isotherms for the removal and recovery of methyl orange from wastewaters using waste materials. J. Hazard. Mater. 2007 ...
    ... 49–55. [CrossRef] [PubMed] 15. Pezoti, O.J.; Cazetta, A.L.; Souza, I.P.A.F.; Bedin, K.C.; Martins, A.C.; Silva, T.L.; Almeida, V.C. Adsorption studies of Methylene Blue onto ZnCl2-activated carbon produced from Buriti shells (Mauritia flexuosa L.). J. Ind. Eng. Chem. 2014, 20, 4401–4407. [CrossRef] ...

  • 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

  • Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)

    M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić (2020)
    Self-heating of coal waste is a major problem in the leading coal-producing and consuming countries, independent of the recent or past coal exploitation history. The phenomenon of self-heating is dependent on many factors such as the properties of organic matter (maceral composition and rank), moisture and pyrite content, climate effects, and storage conditions (shape of the dump or compaction of the coal waste). Once deposited, coal waste undergoes oxidation, which can lead to self- heating with the overall temperatures ...
    Stratigraphy,Economic Geology,Geology,Fuel Technology

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... Gacko lignite) to 0.38% Rr for the Eocene coaly marl. Further study of organic matter in East Herzegovina should include more detailed microscopic studies and mi- crosolubility experiments, but also analyses of biomarkers and kerogen transformation kinetics. Acknowledgements The study was supported ...
    ... Gacko lignite) to 0.38% Rr for the Eocene coaly marl. Further study of organic matter in East Herzegovina should include more detailed microscopic studies and mi- crosolubility experiments, but also analyses of biomarkers and kerogen transformation kinetics. Acknowledgements The study was supported ...
    ... 12.] Lafargue, E., Marquis, F. & Pillot, D., 1998. Rock-Eval 6 applica- tions in hydrocarbon exploration, production, and soil con- tamination studies. Revue de l’Institut Français du Pétrole, EDP Sciences, 53: 421–437. Mandić, O., De Leeuw, A., Vuković, B., Krijgsman, W., Harzhauser, M. & Kuiper ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... recent studies have employed ML for this purpose. For example, in 1990, Dickinson and Jennings compared various pattern recognition methods. Over the years, different methods and algorithms, including neural networks and deep learning, have been used to analyze and classify cards.Recent studies have ...
    ... publications. - The Repository is available at: www.dr.rgf.bg.ac.rs University of Belgrade Faculty of Mining and Geology Master thesis Master Studies Application of machine learning for diagnosing the operation of a deep well pump in oil production Student: Mentor: Maja Trikić Prof.dr Predrag ...
    ... creates synthetic samples from the minority class rather than just making copies of existing examples. 6.3.3. Metrics for imbalanced datasets Many studies use accuracy, which measures the ratio between the number of correctly classified samples and the total number of samples. However, with imbalanced ...

  • 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
    ... wordnets. Types of relations between concepts originate from information-retrieval thesauri, but some explications are made on the basis of ontological studies. There exist several large Russian thesauri presented in the same format: • RuThes thesaurus comprising words and phrases of literary Russian together ...
    ... 148–154. Gruber, T. R. (1995). Toward principles for the design of ontologies used for knowledge sharing? International journal of human-computer studies, 43(5-6):907–928. Guarino, N. and Welty, C. A. (2009). An overview of ontoclean. In Handbook on ontologies, pages 201–220. Springer. Guarino, N. ...

  • The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)

    Marina Čokorilo Ilić, Ana Mladenović, Marina Ćuk, Igor Jemcov (2019)
    Geography, Planning and Development,Aquatic Science,Biochemistry,Water Science and Technology
    ... ic conditions require a comprehensive research approach to the interaction of groundwater and the water transported by a pressurized tunnel. Most studies dealing with this subject matter consider the problem of rapid groundwater inflow into a tunnel [4–9] and issues of structural stability [10,11]. ...
    ... ic conditions require a comprehensive research approach to the interaction of groundwater and the water transported by a pressurized tunnel. Most studies dealing with this subject matter consider the problem of rapid groundwater inflow into a tunnel [4-9] and issues of structural stability [10,11]. ...

  • Application of ERT in the study of debris-flow source area: Case study Selanac debris flow

    Dragana Đurić, Jelka Krušić, Biljana Abolmasov (2021)

  • Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP

    Igor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović (2024)
    Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odziv
    ... reduction around a tunnel-Part 1: Guideline for an estimate of groundwater inflow rate Tunn. Undergr. Space Technol. (2010) D.Li et al. Case studies of groundwater flow into tunnels and an innovative Water- gathering system for water drainage Tunn. Undergr. SpL. Tech. (2009) A. Mangin Pour ...

  • 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

  • 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
    ... [15], sand [16], active sludge from wastewater treatment [17], etc. However, most research studies are focused on MICP applications as well as the determination of mechanisms for process control. Very few studies are oriented to com- prehensive profiling of the MICP through the formation of the whole procedure ...
    ... muralis, B. lentus, B. simplex, B. firmus, and B. licheniformis by the MALDI-TOF mass spectrometry. Despite following the targeted activity, kinetic studies were included important aspects of ureolysis and the MICP such as cell concentration, pH profiling, and reduction in calcium ion concentration. At ...
    ... muralis, B. lentus, B. simplex, B. firmus, and B. licheniformis by the MALDI-TOF mass spectrometry. Despite following the targeted activity, kinetic studies were included important aspects of ureolysis and the MICP such as cell concentration, pH profiling, and reduction in calcium ion concentration. At ...

  • Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone

    Aleksandar Luković (2021)
    Proces obrazovanja minerala iz sistema FeO-Fe2O3-TiO2 u uzorcima vulkanskih stena i porfirskih orudnjenja borske zone prikazan kroz pojavu magnetita/hematita i njihovih alteracija. Minerali ove zone su ispitivani optičkim metodama (odbijena i propuštena svetlost), SEM-EDS/BSD, XRPD, LA-ICP-MS metodama. Rezultati ispitivanja su, pored glavnih Fe – Ti oksida, otkrili prisustvo ferijskog ilmenita u hornblenda andezitima I vulkanske faze kao i magnetita sa većim koncetracija Cr u zoni zlotske magnetne anomalije. Ispitivanje uzoraka iz bušotina porfirskih sistema borske zone otkriva postojanje nekoliko ...
    magnetit, hematit, hemoilmenit, Borska metalogenetska zona, porfirska ležišta
    ... R. L., (1980): Oriented magnetite inclusions in pyroxenes from the Grenville Province, Can. Mineral., 18, 89 – 99. Force, E. R., (1980): The Provenance of Rutile. SEPM Journal of Sedimentary Research, Vol. 50, 485-488. Frandsen, C., Stipp, S. L. S., McEnroe, S. A., Madsen, M. B., & Knudsen, J ...
    ... Razjigaeva, N. G., Naumova, V. V., (1992): Trace Element Composition of Detrital Magnetite from Coastal Sediments of Northwestern Japan Sea for Provenance Study. SEPM Journal of Sedimentary Research, Vol. 62. Robinson, P., Harrison, R.J., McEnroe, S.A., Hargraves, R.B., (2002): Lamellar magnetism ...
    ... (2012): Petrolographic, ore microscopic and SEM-EDS studies of the samples from the drill-hole FMTC1210. Report to the BEM doo Company, 59 str. Cvetković, V., Šarić, K., & Pačevski, A., (2013): Petrolographic, ore microscopic and SEM-EDS studies of 10 samples from drill-holes FMTC 1327, 1328, 1332 ...

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

  • Evaluation And Perspectives Of Underground Coal Mines In Serbia

    Vladimir Milisavljević, Milena Lekić, Ivica Ristović, Vojin Čokorilo, Aleksandar Cvjetić (2017)
    ... part of JP EPS, and [3], study financed by European Agency for Reconstruction whose beneficiary was Ministry of Mining and Energy, RoS. These studies identified the need for investment in some of the mines to improve their technical performance and also limiting potential of the other ...

  • Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta

    Aleksandar Pačevski (2022)
    ... s and conclusions are obtained which can be very harmful to the research itself. Proper use of the up-to-date microprobe methods in the mineral studies can be achieved only by their combining and upgrading on the basic investigations by polarized light microscope. A good model for this research approach ...

  • English for Geology Students. 1

    Lidija Beko (2023)
    Engleski jezik
    ... have visit- ed the Moon, bringing back rocks and dust for further study; samples have also been collected from Mars. Such explorations and studies allow scientists to construct a picture of the similarities and differenc- es between the Earth and other extraterrestrial bod- ies, much as ...

  • Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides

    Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)
    oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem
    ... . Glob. Planet. Chang. 103, 19–38. Stojadinovic, U., Matenco, L., Andriessen, P., Toljić, M., Rundić, Lj, Ducea, M.N., 2017. Structure and provenance of Late Cretaceous–Miocene sediments located near the NE Dinarides margin: inferences from kinematics of orogenic building and subsequent extensional ...
    ... with significant strain partitioning (e.g., Jolivet et al., 2018; van Hins- bergen et al., 2020; van Unen et al., 2019a). Similar to many other studies (e.g., Benesh et al., 2014; Cembrano et al., 2005; D'el-Rey Silva * Corresponding author at: Utrecht University, Faculty of Geosciences, Utrecht ...
    ... in the South Carpa- thians in the northeast to deformation in the Balkanides in the southeast. We correlate our results with previously published studies from the neighbouring East Carpathians, Rhodope, Dinarides, Pannonian Basin and Morava Valley Corridor (Fig. 1b, e.g., Brun and Sokoutis, 2007; ...

  • Aлтерације перидотита контролисане карактером флуида на примеру харцбургита Рудника - Серпентинизација или талкизација?

    Стефан Петровић, Наталија Батоћанин (2020)
    У раду су приказани резултати испитивања серпентинисаних харцбургита Брђана (43°58'45.1" СГШ, 20°25'12.6" ИГД) и талкизираних харцбургита откривених у интервалу 429-559.8 m у истражној бушотини 330А/18 (44°07'33.2" СГШ, 20°30'28.5" ИГД) на Руднику. Узорци оба локалитета показују карактеристике резидуалних харцбургита из омотача, односно тектонита; лепидобластичне, бластозрнасте, или порфирокластичне структуре и масивне текстуре. Серпентинисани харцбургити и серпентинити Брђана су изграђени од серпентина, ретких реликата оливина и ортопироксена, акцесорног спинела, и веома ретког секундарног магнезита и магнетита. Најдоминантнији састојак (местимично гради и преко ...
    Рудник, Брђани, харцбургити, серпентинити, талк
    ... INTRODUCTION Ultrabasic rocks in the exploited field of the mine Rudnik were accessed by exploration boreholes in 2018. Samples for further studies were taken from the borehole 330А/18 (Fig. 1) where three lithological units were distinguished: coarse-grained 23 weakly metamorphosed s ...
    ... in the serpentine multisystem. Schweiz. Mineral. Petrogr. Mitt., pp. 79-93. FAUST, T. G. & FAHEY, J. J. (1962): The Serpentine-Group Minerals - Studies of the natural phases in the system MgO-SiO2-H2O and the systems containing the congeners of magnesium. Geological Survey professional paper, 384-A ...

  • Frequency and Length of Syllables in Serbian

    Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)
    Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.
    frekvencije slogova, dužina slogova, srpski jezik
    ... translations to all standard Slavic languages (except for Lower Sorbian) is available (Kelih, 2009), which will make possible to conduct typological studies on the level of syllable when 14 The Cyrillic alphabet follows a different order of letters ...
    ... I.-I., Altmann, G., Grzybek, P., Jayaram, B.D., Köhler, R., Krupa, V., Mačutek, J., Pustet, R., Uhlířová, L., Vidya, M.N. (2009). Word Frequency Studies. Berlin, New York: de Gruyter. Popescu, I.-I., Naumann, S., Kelih, E., Rovenchak, A., Sanada, H., Overbeck, A., Smith, R., Čech, R., Mohanty, P ...

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... obtained are presented in Table 4. Similar phosphogypsum activity levels for the radionuclides *U, “Ra, ' Th and 'K have also been reported in other studies (Sahu et al, 2014; Jung et al., 2017). The activity concentration values for natural radionuclides before and after the sealing of the samples' ...
    ... (accessed 5 May 2018). Hammas l., Horchani-Naifer K. & Fćrid M. (2013) Characterization and optical study of phosphogypsum industrial waste. Studies im Chemical Process Technology, 1, 30-36. Hua S, Wang K. & Yao X. (2016) Developing high performance phosphogypsum- based cementitious materials ...