Претрага

Упит dcterms_subject_txt:Inorganic Chemistry,General Chemistry

553 items

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica
    ... Belgrade, 11000, Serbia, bInstitute of Mineralogy and Petrography, University of Innsbruck, Innrain 52, Innsbruck, A-6020, Austria, cDepartment of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 3, Novi Sad, 21000, Serbia, dUniversity ...
    ... Cryst. A51, 887–897. Dabić, P., Nikolić, M. G., Kovač, S. & Kremenović, A. (2019). Acta Cryst. C75, 1417–1423. Felsche, J. (1973). The Crystal Chemistry of the Rare-Earth Silicates. In Rare Earths. Structure and Bonding, Vol. 13. Berlin, Heidelberg: Springer. Figueiredo, B. R., Valente, A. A., Lin ...
    ... State Chem. 235, 100–106. Lazic, B., Kahlenberg, V., Kaindl, R. & Kremenović, A. (2009). Solid State Sci. 11, 77–84. Liebau, F. (1985). Structural Chemistry of Silicates: Structure Bonding and Classification, p. 347 Berlin, Heidelberg: Springer-Verlag. Meagher, E. P., Tossell, J. A. & Gibbs, G. V. (1979) ...

  • Contrastive Analysis of Syntax Patterns in Comparable Football Corpora in Spanish and Serbian Languages

    Jelena Lazarević, Olivera Kitanović (2024.)
    Cilj rada je istraživanje kolokabilnosti kao načina na koji se leksičke jedinice povezuju sa rečima iz različitih kategorija, formirajući veće jedinice. Istraživanje semantičkih i sintaksičkih principa ovih kombinacija u španskom i srpskom jeziku fudbala izvedeno je na komparabilnim fudbalskim korpusima SrFudKo i EsFudko, razvijenim u okviru doktorske disertacije Jelene Lazarević pod nazivom: Jezičke odlike diskursa novih medija o fudbalu: kontrastivna analiza na korpusu srpskog i španskog jezika. Korpus fudbala SrFudKo, kreiran na osnovu tekstova o fudbalu sa pet srpskih veb-portala: ...
    fudbal, korpusi, terminologija, kolokacije, srpski, španski

  • 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

  • Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?

    Nikola Stanković, Taras Gerya, Vladica Cvetković, Vesna Cvetkov (2024)

  • Multi-elemental analysis of real water samples from the Požega area, Serbia

    Nebojša Pantelić, Jana Štrbački, Ivana Maloparac, Nikola Tomašević, Biljana Dojčinović, Aleksandar Kostić (2022)
    Cilj ovog rada bio je ispitivanje kvaliteta realnih uzoraka vode za piće, prikupljenih sa teritorije grada Požege i okolnih seoskih naselja. Za određivanje koncentracije makro i mikroelemenata u uzorcima vode korišćena je analitička tehnika induktivno kuplovana plazma sa optičkom emisionom spektrometrijom, ICP-OES. Dobijeni rezultati upoređivani su sa maksimalno dozvoljenim kocentracijama elemenata propisanim nacionalnim Pravilnikom o higijenskoj ispravnosti vode za piće, kao i preporukama Svetske zdravstvene organizacije (WHO) i Američke agencije za zaštitu životne sredine (EPA). Analizirane vode su malomineralizovane ...
    General Materials Science

  • Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world

    Bogoljub Vučković, Bojan Dimitrijević (2023)
    The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...
    lignite, heavy metals, concentrations
    ... the concentrations in our lignite. In the following chapters we will deal with this issue. Key Words: lignite, heavy metals, concentrations 1. GENERAL INFORMATIONS The coal basin is located in castern Serbia, between the Velika Morava and Mlava rivers, which flow into the Danube in that area (figure ...
    ... -| 4952000 -| 4950000 -| 4948000 -| 4946000 -| 75);000750600075030007513000751&0007513000751š00075'š0007526000152ž0007524000 Figure 2. General overview of exploration wells (black dots) for the period 1941-2022. years in the Kostolac-Kovin coal-bearing basin, blue thick line — river Danube ...
    ... 12000751400075160007518000752000075220007524000 75040007500000750800075100007512000751400075100007518000752000075220007523000 b) d) Figure 3. General view of the spatial distribution of 5 separate coal seams in the Kostolac-Kovin coal bearing basin – a) I (red dots) and I (pink dots) coal seams; ...

  • Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2017)
    Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...
    ... search retrieves only 169 of them, some of which refer to a municipality council, others to salt. Faceted search in general improves ranking within the initial system. Namely, if a “general search” is performed instead of a faceted search for the query “Tamnava or Ub and coal or lignite” the document “Coal ...
    ... retrieval results of indexed documents for a specific query and the results were compared with the initial retrieval system that was already in place. In general, a significant improvement has been achieved according to the standard information retrieval performance measures, where the InQuery method performed ...
    ... retrieval results of indexed documents for a specific query and the results were compared with the initial retrieval system that was already in place. In general, a significant improvement has been achieved according to the standard information retrieval performance measures, where the InQuery method performed ...

  • 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 ...

  • 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
    ... : evidence from fission-track thermochronology. Tectonophysics, 297, 229-249. 89 Bosi, F., Halenius, U., & Skogby, H., (2009): Crystal chemistry of the magnetite-ulvospinel series. American Mineralogist, 94(1), 181–189. Boutroy, E., Dare, S.A.S., Beaudoin, G., Barnes, S.J., Lightfoot, P ...
    ... project of Nikoličevo: drill hole NRNK17003. Report to the Tilva doo Company, 60 str. Czamanske, G. K., Ishihara, S., & Atkin, S. A., (1981): Chemistry of rock-forming minerals of the Cretaceous-Paleocene batholith in southwestern Japan and implications for magma genesis. Journal of Geophysical ...
    ... Petrologic andMagnetic Significance. Mineralogical Society of America, Reviews in Mineralogy, 25, 69-106. Lindsley, D.H., (1976). The crystal chemistry and structure of oxide minerals as exemplified by the Fe–Ti oxides. In: Rumble III, D. (Ed.), Oxide Minerals. Rev. Mineral. Mineral. Soc. Am., pp ...

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... the resource content, date when the resource was made available to the public, contributor and type of resource are general data, originating from the DC standard. Within general data, a unique code is defined to provide unambiguous identification and access to the resource. Title is the resource ...
    ... can thus conclude that academic and entrepreneurial knowledge are complementary and intertwine in various ways (Gaul & Schader, 2012). In general, knowledge acquisition from these two sources of knowledge is separated, as academic knowledge offered by higher education institutions precedes ...
    ... students to make their choice of the university that best suits their needs. Besides enhancing cooperation between academia and enterprises in general, BAKTEL network will serve as a valuable tool for facilitating and enhancing cooperation between different universities, on issues such as development ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... Kounov, A., Ovtcharova, M., Schaltegger, U., et al. (2011). Cenozoic granitoids in the Dinarides of Southern Serbia: Age of intrusion, isotope geo- chemistry, exhumation history and the significance for the geodinamic evolution of the Balkan Peninsula. International. Journal of Earth Science, 100, 1181–1206 ...
    ... remanence was hematite (Table 1, items marked with stars). The white parts of the cylindrical features at locality 6 and the whitish-greyish samples in general exhibited practically single component magnetization, departing in a clockwise (CW) sense from the present north (Fig. 5, specimens 3968B, 3965A ...
    ... andesite came from the area south of the same area (Cvetkov et al. 2012). They exhibited about 30� CW vertical-axis rotation, after correcting for the general northward tilting of the Fruška Gora during the Miocene. The 30� CW was followed by about 40� CCW vertical-axis rotation just before the Latest ...

  • Automatic construction of a morphological dictionary of multi-word units

    Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić (2010)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multiwordn units, noun phrases, query expansion
    ... and maintain, conditions for some 6 Authors Suppressed Due to Excessive Length rules were grouped into general and specific conditions, where specific conditions are simply additions to general conditions. One rule will illustrate this: Fig. 1. The XML Schema for a strategy document
    ... conditions. Table 3. Overview of rules for nouns and adjectives with 2 to 7 components Components Rules for nouns Rules for adjectives (general) (special) (general) (special) 2 26 59 5 9 3 25 85 8 8 4 14 50 5 5 5 6 54 2 2 6 4 29 7 1 9 Total 76 286 20 24 The rules are applied in the sequence in which ...
    ... nxn2m Kneževina Monako Principality of Monaco The second component does not neces- sarily inflect On the basis of this information we got the general idea which combinations of atomic data can we expect to be extracted from dictionaries of simple words and how they combine with inflectional classes ...

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • Paleomagnetic evidence for post-collisional Miocene clockwise rotation in the Serbian segment of the Vardar Zone and the Danubicum

    Vesna Lesić, Emő Márton, Vesna Cvetkov, Dragana Tomić (2015)

  • ‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions

    Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban (2020)
    Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...
    Firing, Glaze, Traditional ceramics, Provenance studies, Augite

  • Quantitative analysis of syllable properties in Croatian, Serbian, Russian, and Ukrainian

    Biljana Rujević, Marija Kaplar, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Jan Mačutek (2021)
    slogovi, distribucija rang-preciznost, slovenski jezici

  • 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
    ... twins of olivine. Primary rocks from both localities were of same mineral composition: olivine + enstatite. The action of solutions of different chemistry and temperature resulted in their quite different transformations. Harzburgites from Brdjani are intensively serpentinized by low-temperature aqueous ...

  • Development of A Business Intelligence Tool For Accident Analysis in Mines

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić (2015)
    ... 1. INTRODUCTION Mine safety is one of the key issues in mining industry, and it is safe to say that research in industrial safety in general originates from mine safety (Danihelka, 2012). Mining is one of those high-risk industries where errors carry such potentially disastrous consequences ...
    ... is still scarce in Serbian mining practice. However, various other applications of ICT in the field of mining have emerged in the past decade. In general, ICT is introduced in various mining engineering systems most often in the form of information systems, with the basic goal to secure reliable i ...
    ... unambiguous definition, accompanied by lexical and semantic relations with other terms. The example of lexical relations is established between general and more specific terms, such as "coal mine", and "open pit", which is a specific type of coal mine, also with synonyms such as "opencast", "surface ...

  • Geodiversity assessment in urban areas

    Ilić Marina, Stojković Sanja, Rundić Ljupko, Ćalić Jelena & Sandić Dejan (2017)

  • Ефикасност дистрибуције и коришћења природног гаса у домаћинствима

    Dejan Brkić (2010-03-30)
    Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...
    prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm
    ... pipe. Industrial and  Engineering Chemistry Fundamentals 18(3), 296–297. (на енглеском)  ‐ 188 ‐ Дејан Бркић, Докторска дисертација      68. Chen, N.H. 1980. Comments on “An explicit equation for friction factor in pipes”.  Industrial and Engineering Chemistry Fundamentals 19(2), 229–230. (на е ...
    ... nt flow friction factor calculation. Industrial and Engineering Chemistry  Research 46(8), 2593‐2600. (на енглеском)  262. Spriggs, H.D. 1973. Comments on transition from laminar to turbulent flow. Industrial  and Engineering Chemistry 12(3), 286‐290. (на енглеском)  263. Spriggs, H.D. 1973. Errat ...
    ...  Erratum: Comments on transition from laminar to turbulent flow  (Industrial Engineering Chemistry Fundamentals (1973) 12 (286)). Industrial Eng  Chemistry Fundamentals 12(4), 493. (на енглеском)  264. Stanislaw, S. 1985. The measurement of demand for natural gas. Energy 10(2), 165–180.  (на енглеском)  ...