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Упит dcterms_subject_txt:Physical and Theoretical Chemistry

2367 items

  • Flotability of chalcopyrite from the Rudnik deposit

    Đurica Nikšić, Predrag Lazić, Milena Kostović (2021)
    Директно селективно флотирање олова, бакра и цинка у флотацији рудника „Рудник” датира од 1984. године. Технолошка шема омогућава директно издвајање селективних концентрата у три циклуса. У првом циклусу се издваја минерал олова (галенит), док су минерал бакра (халкопирит) и минерал цинка (марматит) депримирани. У другом циклусу се оток концентрације минерала олова кондиционира и припрема за издвајање минерала бакра. Након кондиционирања, у овом циклусу се издваја минерал бакра. У трећем циклусу се оток концентрације минерала бакра кондиционира и припрема за ...
    Директно селективно флотирање, халкопирит, KAX, NaCN

  • Еоценска фауна југозападног дела Сирт басена (Либија)

    Љупко Рундић, Мери Ганић (2020)
    Еоцен, крупни мекушци, нумулити, ЈЗ Сирт басен, Либија

  • 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
    ... General and Physical Chemistry, Studenski Trg 12/V, 11000 Belgrade, Serbia; latopezo@yahoo.co.uk 3 BioSense Institute, University of Novi Sad, Dr Zorana Ðind̄ića 1, 21000 Novi Sad, Serbia; jovana.stanojev@biosense.rs (J.S.); branimir.bajac@biosense.rs (B.B.) 4 Department of Crystallography and Mineralogy ...
    ... General and Physical Chemistry, Studenski Trg 12/V, 11000 Belgrade, Serbia; latopezo@yahoo.co.uk 3 BioSense Institute, University of Novi Sad, Dr Zorana Dindiéa 1, 21000 Novi Sad, Serbia; jovana.stanojev@biosense.rs (J.S.); branimir.bajac@biosense.rs (B.B.) Department of Crystallography and Mineralogy ...
    ... alkaline environments and with the capability to do the MICP effectively [30]. The bacterial strains II8 and II10 are identified as B. muralis and B. lentus (identification scores were 2.76 and 2.28, respectively), while isolates III11, III15, and IV5 are B. simplex, B. firmus, and B. licheniformis, with ...

  • 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)
    ... the focus is on the theoretical basis of low-temperature systems. Conditions that favor arsenic migration are associated with a reducing medium in which desorption and dissolution take place. Low Eh levels (<50 mV), the absence of dissolved oxygen, high concentrations of Fe, Mn, and NH4 +, elevated alkalinity ...
    ... 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 ...
    ... existence of toxic risk. Futhermore, in the study area 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 persons, and this should indicate the importance of developing a regional water sup- ply system ...

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)

  • 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

  • Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling

    Branislav Petrović, Veljko Marinović, Zoran Stevanović (2023)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations

    Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina (2023)
    Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...

  • 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
    ... Lindsley, D.H., & Prewitt, C.T., (1984): Crystal stucture and cation distribution in titanomagnetites (Fe3-xTixO4). American Mineralogist, 69, 754-770. Whalen, J.B., & Chappell, B .W., (1988): Opaque mineralogy and mafic mineral chemistry of I- and S-type granites of the Lachlan Fold belt, southeast Australia ...
    ... (1980): The ore minerals and their intergrowths. Pergamon press (2nd ed.), 1205 str, u dva toma. (Prvo izdanje, 1969). 95 Ramdohr, P., (1975): Die Erzmineralien und ihre Verwachsungen. Akademie-Verlag, Berlin. Ray, G.E., Webster, I.C.L., (2007): Geology and chemistry of the low Ti magnetite-bearing ...
    ... C., (1951): Neutron Scattering and Polarization by Ferromagnetic Materials. Physical Review, 84(5), 912–921. Sievwright, R. H., Wilkinson, J. J., O’Neill, H. S. C., & Berry, A. J., (2017): Thermodynamic controls on element partitioning between titanomagnetite and andesitic–dacitic silicate melts ...

  • Regulacija nivoa tečne faze u vertikalnim separatorima

    Katarina Šoštarić (2024)
    Ovaj diplomski rad bavi se regulacijom nivoa tečne faze u vertikalnim separatorima u industriji nafte i gasa. U radu su istraženi različiti metodi merenja nivoa, uključujući plovke, ultrazvučne i radarske senzore. Radarski senzori su se pokazali kao najefikasniji u teškim radnim uslovima, zahvaljujući njihovoj visokoj preciznosti i pouzdanosti. Rad uključuje teoretski pregled metoda merenja nivoa, detaljno poređenje prednosti i nedostataka različitih senzora, kao i studiju slučaja implementacije radarskog senzora u vertikalnom separatoru. Analiza rezultata i preporuke za buduća istraživanja ...
    Merenje nivoa, Vertikalni separator, Radarski senzori, Ultrazvučni senzori, Industrija nafte i gasa
    ... paper includes a theoretical overview of level measurement methods, a detailed comparison of the advantages and disadvantages of different sensors, as well as a case study of the implementation of a radar sensor in a vertical separator. An analysis of the results and recommendations for future research ...
    ... separators in the oil and gas industry. Different methods of level measurement were investigated in the paper, including floats, ultrasonic and radar sensors. Radar sensors have proven to be the most effective in difficult working conditions, thanks to their high precision and reliability. The paper ...
    ... research and improvement are also presented. Keywords: Level measurement, Vertical separator, Radar sensors, Ultrasonic sensors, Oil and gas industry 1. UVOD Diplomski rad rađen na temu “Regulacija nivoa tečne faze u vertikalnim separatorima” sastoji se iz opšteg i specijalnog dela. Merenje ...

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Минерагенија зеолитских туфова Србије

    Vladan Kašić (2018-02-05)
    Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...
    минерагенија, зеолитски туф, Србија, клиноптилолит, хојландит
    ... Montero L. A., (1998): Theoretical study of the physical adsorption of aspirin on natural clinoptilolite. Microporous and Mesoporous Materials 23(5-6), 247-252. Langella, A., Cappelletti, P., de’ Gennaro R., (2001): Zeolites in Closed Hydrologic Systems. Reviews in Mineralogy and Geochemistry, 45, 1 ...
    ... П-838/00. Tomašević-Čanović M., Stanić T., Živanović A., Lemić J., (2004), 7th Intern. Conf. on Fundam. and Appl. Aspects of Physical Chemistry, Beograd, Removal of arsenate by cationic surfactant and iron hydroxide-loaded natural clinoptilolite, Vol. II, 2004, 751-753. Farkaš A., Cerjan-StefanovićŠ ...
    ... MatijasevićS., BrankovićA., TodorovićM., (2007): Mineralogical, Chemical, Physical, and Crystallographic Characterization of Analcime Tuff from Megare Deposit, Bosnia and Herzegovina“,39 th International October Conferenceon Mining and Metallurgy, SokoBanja, 422-426. 164 Stojić V., Gvozdić D ...

  • Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

    Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar (2019)
    keramika, glina, Dobrodo, mineralogija, sirovina, Srbija

  • 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
    ... natural stone slabs for architectural cladding and paving for exterior and interior use. With the actual national standards for natural stone products, designers and investors have lost the usability reference in evaluating stone quality. The theoretical contribution of previous studies delivers ...
    ... as the titrant. To determine the quality of the selected carbonate rocks, the physical and mechanical properties (bulk and apparent density, porosity, water absorption, frost resistance, com- pressive strength, and abrasive resistance) were examined for 52 collected samples. The laboratory tests ...
    ... 120 16 100 14 80 ı_ d 60 12 KI TS sT SK KI TS sT SK Fig. 4 Boxplot diagrams of physical and mechanical properties of limestones: a bulk density (ZSP) and real density (ZBP); b porosity (P) and water absorption (Uv); c compressive strength-dry, water rudstone). They also have a low porosity ...

  • Old or New, We Repair, Adjust and Alter (Texts)

    Cvetana Krstev, Ranka Stanković (2020)
    U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.
    ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja
    ... entities in texts”. Theoretical Computer Science Vol. 313, no. 1 (2004): 93–104 Henton, Caroline G. “Automated transformation from American English to British English”, 2004, uS Patent 6,738,738 Jaćimović, Jelena. “Textometric methods and the TXM platform for cor- pus analysis and visual presentation” ...
    ... confused, for instance letters ‘п’, ‘и’, ‘н’, letters ‘с’ and ‘е’, letters ‘с’ and ‘о’ (but not ‘е’ and ‘о’); – A group of letters can be confused for one letter or another group of letters, e.g. two letters ‘га’ and one letter ‘ш’; two letters ‘шп’ and two letters ‘иш’; – Letters can be confused for digits ...
    ... Latin alphabet that can be accommo- dated by ASCII character set, and affects five letters: š, d, č, ć and ž. As a result, some letters or letter groups become ambiguous: – c – can stand for č and ć (and c); – z – can stand for ž (and z ); 5 The example text is from the novel by Lazar Komarčić ...

  • Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia

    Filip Arnaut, Dragana Đurić, Uroš Đurić, Mileva Samardžić-Petrović, Igor Peshevski (2024)
    General Earth and Planetary Sciences
    ... algorithms RF and KNN with various data. In this study, both RF and KNN were used to combine satellite multispectral data with geo- physical airborne and terrestrial data, as well as the distance to fault map, as features. Incorporating these data, particu- larly geophysical data (airborne and terrestrial) ...
    ... geological and geo- physical data, and this was the primary reason for using this algorithm to predict ophiolite. Tuning and validation are essential components of all ML -based models, including the RF algorithm. According to previous research (Breiman 2001; Catani et al. 2013; Harris and Grunsky ...
    ... A Brief Synthesis Of Geology And Geochemical Data. Contrib Sec Nat Math Biotech Sci, Mac- edonian Academy of Sciences and Arts 39:51—68. https://doi. org/10.20903/csnmbs.masa.2018.39.1.119 Bolt GH, Bruggenwert MGM (1976) Composition of the Soil. Soil Chemistry: A Basic Elements 1—12. https://doi ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... Lutovac S,. (2005): Technique of Blasting and Eartquakes, Faculty of Mining and Geology, Belgrade, pp. 199. [3] Simeunović D,.(1985): Mathematics, Faculty of Mining and Geology – Mining Department, Belgrade pp. 102- 103. [4] Ivanović B., (1973): Theoretical Statistics, Naučna knjiga, Belgrade, ...
    ... influence the process of exploration and exploitation, were noted in the deposit. Only after blasting, blocks of rocks 0.50 m3 occur, which could be attributed to the effect of small faults and carstified cracks in the de- posit. By examination the physical and me- chanical properties of the working ...
    ... 80 m, the direction of propagation is NE-SW and a slope of about 42º towards the southwest. These rocks, in engineering and geological terms, belong to a group of associated rocks, which are cracked and carstified [7]. During previous exploitation and exploitation works, no significant burst d ...

  • Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels

    Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)
    drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel

  • Sinteza i strukturna karakterizacija mikroporoznih arsenata i fosfata

    Sabina Z. Kovač (2015-09-28)
    Predmet rada i istraživanja ove doktorske disertacije su sinteza i strukturnekarakteristike novih kristalnih arsenata i fosfata koji sadrže Mg, K, Ca, Mn, Fe, Co, Ni,Cu, Zn, Sr, Ba i druge katjone. U strukturama arsenata i fosfata, AsO4- i PO4-tetraedrinajčešće se vezuju sa tetraedarski ili oktaedarski koordinisanim katjonima prelaznihmetala formirajući otvorene strukture (slojeve ili 3D mreže) sa širokim opsegomrazličitih topologija. U šupljinama ili porama u obliku povezanih ili nepovezanihkanala, tunela, kaveza i međuslojnog prostora mogu se ugraditi različiti vanmrežni joni(obično ...
    hidrotermalna sinteza, mikroporozna jedinjenja, arsenati, fosfati,rendgenska strukturna analiza
    ... 18. Baur, W. H. and Fischer, R. X. (2002) ”Zeolite-Type Crystal Structures and their Chemistry”, Zeolite Structure Codes DAC to LOV. Subvolume C in Landolt- Börnstein, Numerical Data and Functional Relationships in Science and Technology, New Series, Group IV: Physical Chemistry, Volume 14, M ...
    ... J. and Parshley J. (2001) ”Arsenic cycling in the mining environment. Characterization of waste, chemistry, and treatment and disposal”, proceedings and summary report on U.S. EPA workshop on managing arsenic risks to the environment, May 1–3, Denver, Colorado, USA. 28. Brese, N. E. and O’Keeffe ...
    ... (2009) ”Arsenic: Environmental Chemistry, Health Threats and Waste Treatment”, John Wiley and Sons, The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ, United Kingdom. 75. Hennig, T. J. and Jacobs, H. (1992) Z. Anorg. Allg. Chem. 616, 71–78. 76. Hughes, J. M. and Rakovan, J. (2002) The crystal ...

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... Majdanpek open pit we performed experimental investigations on copper ore [17]. The basic physical and mechanical properties of the rock mass were determined on samples in the laboratory. By examining the physical and mechanical properties of the work environment, the following values were obtained: • ...
    ... Serbia, and belongs to Kolubara District. The limestone deposit Nepričava consists of rock masses of sedimentary origin, not entirely homogeneous in composition. Limestones are the most important lithological members from both economic aspect and aspect of mining exploitation technology. Physical and ...
    ... Engineering 24; Elsevier: Amsterdam, The Netherlands, 2004; pp. 887–892. 3. Sambuelli, L. Theoretical Derivation of a Peak Particle Velocity–Distance Law for the Prediction of Vibrations from Blasting, Rock Mechanics and Rock Engineering; Springer: New York, NY, USA; London, UK, 2009; Volume 42, pp. 547–556 ...