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Упит dcterms_subject_txt:aktiviranje minerala

476 items

  • Испитивање магнетске сусцептибилности прашине антропогеног порекла

    Дубравка Новичић, Весна Цветков, Весна Дамњановић (2019)
    ... prirodni magnetični mineral na Zemlji a javlja se u kontinentalnoj i u okeanskoj kori kao primarni ili sekundarni mineral u magmatskim, sedimentnim i metamorfnim stenama. U zemljištima i sedimentima može rezultirati usled aktivnosti bakterija. Međutim, može nastati kao veštački mineral u atmosferi u procesu ...
    ... identifikaciju gvožđevitih minerala koji su prisutni u uzorku; računanje njihove koncentracije ili ukupne zapremine sa visokom tačnošću; klasifikaciju različitih vrsta materijala i identifikaciju procesa njihovog formiranja ili transporta. Veličine gvožđevitih minerala, takođe, zavise i od vrste ...
    ... 3Univerzitet u Beogradu, Rudarsko-geološki fakultet, Đušina 7, Beograd dubravka.novicic@rgf.bg.ac.rs Izvod Veštački nastali magnetični minerali, naročito magnetit, čiji izvori mogu biti različite grane industrije, saobraćaj, sezonsko grejanje i dr., značajno utiču na zagađenje životne sredine ...

  • Examination of mineral composition and color origin in natural pigments from France and Finland that are stored in the collection of rocks and minerals, University of Belgrade

    Alena Zdravković, Maja Milošević (2022)

  • Predictive modeling for U and Th concentrations in mineral and thermal waters, Serbia

    Marina Ćuk Đurović, Igor Jemcov, Maja Todorović, Ana Mladenović, Petar Papić, Jana Štrbački (2020)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Origin, diversity and geothermal potentiality of thermal and mineral waters in Vrnjačka Banja, Serbia

    Jana Štrbački, Vladimir Živanović, Marina Ćuk Đurović, Nebojša Atanacković, Veselin Dragišić (2020)
    Earth-Surface Processes, Geology, Pollution, Soil Science ,Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... tions are most commonly used in practice. 3.2 Test results of mineral composition of fly ash X-ray diffraction is determined by the mineral composition of the ash and slags samples. The characteristic peaks of the mineral composition are show in Tab. 8 and Fig. 2a, 3a, 5a, 6a. Table ...
    ... using the fly ash from PPNT A for making elements of road structures (top and bottom layers of the road). 2 Experimental 2.1 Mineral properties of fly ash Mineral properties of samples of fly ash from thermal plant PPNT A production were determined by X-ray studies at the Laboratory of Cry ...
    ... strongest mineral calcite. Although the amount of added lime is very small, and the strongest peaks of the dominant portlandite that largely obscured broad diffuse peaks corresponding to a significant share of the amorphous material, it can be confidently said that in the samples this mineral cannot ...

  • Cultural Heritage and Protection of Hand-Wheeled Pottery Manufacture in Western Serbia: Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy

    Milošević Maja, Zdravković Alena, Đordjević Biljana, Jelić Ivana (2021)
    ... Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy | Milošević Maja, Zdravković Alena, Đordjević Biljana, Jelić Ivana | 8th Mineral Sciences in the Carpathians Conference, Acta Mineralogica-Petrographica, Miskolc, Hungary | 2021 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005501 Дигитални ...
    ... publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Acta Mineralogica-Petrographica, Abstract Series, Szeged, Vol. 11, 2021 31 8th Mineral Sciences in the Carpathians Conference, May 13–14, 2021, Miskolc, Hungary CULTURAL HERITAGE AND PROTECTION OF HAND-WHEELED POTTERY MANUFACTURE ...
    ... while sample 2 was made with the application of a modern mould technique. A microscopic examination of the thin sections revealed a uniform mineral composition. No significant differences were observed regarding the inner sections of the pots and their outer rims. Observed pores in sample ...

  • Uticaj površinske obrade kamena na promenu primarne poroznosti

    Ana Radivojević (2024)
    Površinska obrada kamena je izuzetno bitna kod stena koje se koriste u izgradnji svih vrsta objekata. Površinskom obradom se direktno utiče, ne samo na estetska svojstva kamena nego i na njegove fizičko-mehaničke karakteristike. Cilj ovog završnog rada je analiza uticaja poliranja i rezanja kao tehnoloških procesa obrade na poroznost odabranih vrsta arhitektonsko-građevinskog kamena. Ispitivane stene su gabro „Nero Assoluto“, granit sa površinskog kopa „Ploče“, granit African Red, krečnjak sa lokaliteta „Skržut“ i krečnjak poznat pod nazivom „Sirogojno crveni“.
    polirana površinska obrada kamena, rezana površinska obrada, poroznost, kapilarno upijanje vode
    ... Assoluto“ Makroskopskim ispitivanjem stene primećuju se minerali plagioklasa (svetli minerali na slici 3.7) i piroksena (crni minerali na slici 3.7). Stena Je crne boje i zrnaste strukture — u pojedinim delovima uočljivo ukrštanje pritkastih minerala što navodi na prisustvo ofitske strukture. Tekstura ...
    ... površina, b.) polirana površina 26 Petrografskom analizom preparata uočeni su bitni minerali i akcesorni minerali stene. Bitni minerali su plagioklası i pirokseni, a akcesorni apatiti i metalični minerali. Plagioklasi imaju izrazito lamelarno bližnjenje po čemu se lako prepoznaju i nizak reljef ...
    ... Petrografskom analizom preparata uočeni su bitni i akcesorni minerali. Glavni minerali od kojih je stena sačinjena su: kvarc, plagioklas, ortoklas, mikroklin, biotit ı muskovit. Od akcesornih minerala prisutni su apatiti ı metalični minerali. Kvarc je najčešće alotriomorfnog oblika, dok je u manjoj ...

  • Stepen metamorfizma metaklastita rudnika

    Vanja Ćuk (2024)
    Zadatak ovog rada je bio, potvrda saznanja da se na planini Rudnik dogodio kontaktni metamorfizam gornjokrednih sedimentnih stena i da se ispita intenzitet kontakto-metamorfnih promena. Posle kraćeg opisa geografskog položaja, pregleda ranijih istraživanja i geologije šireg područja, usmerena je pažnja na petrološka ispitivanja metaklastita i na kontaktno-metamorfne facije. Usled stvaranja različitih vulkanogenih facija odnosno usled vulkanskih erupcija, delovanjem zagrejane magme (lave) ili zagrejanih fluida, došlo je do kontaktnog metamorfizma, na granici oligocen-miocen i do stvaranja različitih metamorfnih stena, a ...
    Kontaktni metamorfizam, Rudnik, metakonglomerati, metapeščari, metaalveroliti

  • Fluid inclusion study in quartz of the Rudnik Pb-Zn-Cu-Ag skarn deposit, Serbia

    Stefan Petrović, Ronald J. Bakker, Vladica Cvetković, Rade Jelenković (2023)
    Six types of fluid inclusions were identified in three growth zones of hydrothermal quartz from the Rudnik skarn deposit. In the core zone, primary two-phase fluid inclusions of high (type 1) and moderate salinity (type 2) homogenized to liquid between 350-430 °C and 340-420 °C, respectively. Raman analysis revealed that the vapour phases are a CO2-CH4 gas mixture, with a predominance of CO2. The core contains and dispersed vapour-rich fluid inclusions of low salinity (type 3) composed of CO2-CH4-H2S ...

  • WebGIS Cadastre of Abandoned Mines in Autonomous Province of Vojvodina

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2015)
    ... application within mineral resource management, ecology management, but also management within official bodies, responsible for legislative legal, control and monitoring activities in realization of the mineral strategy, mineral policy and the concept of sustainable development in the mineral industry of ...
    ... and exploitation permits and works in the mineral resources field. GeolIEP represents a basis for archiving and efficient handling of vector, raster and related thematic alphanumeric content in one place, as well as efficient management and usage of mineral resources. The use of GeolIEP results in ...
    ... accompanying database" was realized by University of Belgrade, Faculty of Mining and Geology for Vojvodina Provincial Secretariat for Energy and Mineral Resources. The aim was to secure safe and reliable data needed for recultivation of all abandoned mines in national parks and other protected areas ...

  • Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine

    Lazar M. Kaluđerović (2018-01-17)
    fikasnost prilikom sorpcije S-metolahlora i klomazona od strane neorganskih iorganski modifikovanih montmorionita sa lokaliteta Bogovina odreĎena je metodombach adsorpcije. Uzorci montmorionita su tretirani prvo rastvorom NaCl a zatim irazličitim koncentracijama organskih kompleksa. Adsorpcione izoterme su dobijenetretiranjem uzoraka različitim koncentracijama herbicida. Detaljna mineraloškakarakterizacija uzoraka uraĎena je metodom rendgenske difrakcije. Rezultati interakcijemontmorionita sa organskim kompleksima i herbicidima dobijeni su primenomrendgenskih, optičkih, termičkih i spektroskopskih metoda.Na osnovu rezultata rendgenskih ispitivanja uzoraka, utvrĎeno je prisustvoorganskih kompleksa i herbicida u meĎuslojnom prostoru montmorionita.Montmorioniti modifikovani ...
    adsorpcija, montmorionit, heksadeciltrimetilamonijum bromid,feniltrimetilamonijum hlorid, S-metolahlor, klomazon
    ... uključujući minerale filosilikata pomešane sa fino usitnjenim kvarcom, feldspatima, karbonatima, oksidima i hidroksidima Al i Fe i organskom materijom. Iz tog razloga hemijski sastav ne moţe direktno da ukaţe na vrstu prisutnih minerala. Prema "Clay Mineral Society", termin "minerali glina" se ...
    ... površine minerala i samog herbicida. Postoje brojna istraţivanja organske modifikacije montmorionita različitim katjonima. MeĎutim, većina ovih istraţivanja izvoĎena je na komercijalnim montmorionitima dobijenim od strane Društva za proučavanje minerala glina (eng. The Clay Mineral Society) ...
    ... odnosi na minerale podklase filosilikata koji glini daju plastičnost, a koji očvrsnu nakon sušenja ili pečenja (Guggenheim and Martin, 1995). Minerali koji se nalaze u mehaničkoj frakciji gline su minerali podklase filosilikata iz grupe smektita, kaolinit- serpentina, talk-pirofilita, vermikulita ...

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... Am. Mineral. 2012, 97, 1965–1976. [CrossRef] Trittschack, R.; Groberty, B. Dehydroxylation kinetics of lizardite. Eur. J. Mineral. 2012, 24, 47–57. [CrossRef| Trittschack, R.; Groberty, B. The dehydroxylation of crhrysotile: A combined in situ micro-Raman and micro-FTIR study. Am. Mineral. 2013 ...
    ... Biancavilla (Sicily, Italy). Am. Mineral. 2009, 94, 1333—1340. [CrossRef] Giacobbe, C.; Gualteri, A.E.; Quartieri, S.; Rinaudo, C.; Allegrina, M.; Andreozzi, G.B. Spectroscopic study of thermal transformation of chrysotile-asbestos containing, materials (ACM). Eur. J. Mineral. 2010, 22, 535–546. [CrossRef] ...
    ... chemistry and petrologic implications. Am. Mineral. 1996, 81, 1117–1125. [CrossRef] Gatta, D.G.; Merlini, M.; Valdrč, G.; Liermann, H.-P.; Nenert, G.; Rothkirch, A.; Kahlenberg, V.; Pavese, A. On the crystal structure and compressional behavior of talc: A mineral of interest in petrology and materia! ...

  • English for Geology Students. 2

    Lidija Beko (2023)
    Engleski jezik
    ... through heat and by forcing very hot liquids with high mineral contents into the rock. The crystallisation that occurs with cooling results in cracks in the rock being filled with mineral veins or – when the veins are grouped together, mineral lodes. Lodes of metals such as copper, lead, zinc, iron ...
    ... Mystery Files ... e Geology through Myths............. Part 1 Part 2 Part 3 Part 1 Part 2 Part 3 Table of contents • Unit 3 • MINERAL DEPOSITS (COATAS,AfPOSSTL EUET, .,..„/-EP. ..gv . OO.ON. . . ON Vocabulafay?. ... ... .. OMNA . JELMKyA.JNONOP IJI .E .N2 Reading Comprehension ...
    ... as a way in which they wish to teach the subject of English language and geology. Six thematic units: 1. Landslides 2. Metamorphic rocks 3. Mineral deposits 4. Hydrological cycle and groundwater 5. Surface water and glaciers 6. Geophysics, seismology and prospecting treat geology as a ...

  • Mineragenetske karakteristike i potencijalnostjuvelirskih mineralnih resursa leckog vulkanskog kompleksa

    Zoran Ž. Miladinović (2012-12-11)
    Jedan od najznačajnijih regiona u Srbiji, sa stanovišta potencijalnosti juvelirskih mneralnih resursa, predstavlja lecki vulkanski kompleks, tercijarne starosti i dominantno andezitskog sastava. Ovaj vulkanski kompleks površine preko 700km2 nalazi se u južnojSrbiji na prostoru imeđu Kuršumlije, Lebana i Medveđe.Prvi su pažnju na juvelirske mineralne sirovine ovog prostora obratili graditeljiJustinijane Prima-e (VI vek). Najintenzivnija istraživanja izvršena su u periodu 1980–1982. ali samo na malom prostoru krajnjeg jugoistočnog dela vulkanskog kompleksa.U Leckom vulkanskom kompleksu dominiraju andezitske stene i njihovi piroklastiti.Smatra se ...
    vulkanski kompleks, mineragenetske karakteristike, juvelirski mineralni resursi, nalazišta, potencijalnost, kvarc, ametist, ahat, kalcedon, jaspis, prognoza
    ... Svi silicijski minerali svrstani su u jednu grupu – silicijsku, prema Daninoj klasifikaciji, odnosno kvarcnu grupu prema Struncovoj klasifikaciji minerala. U narednoj tabeli dali smo prikaz silicijske odnosno kvarcne grupe minerala. Tabela 1. Silicijska (kvarcna) grupa minerala Kvarc-tridim ...
    ... fragmenata plemenitih silicijskih minerala, nesortiranih po krupnoći, i u manjoj meri, fragmenata vulkanita i piroklastita. Proluvijalni nanosi plemenitih silicijskih minerala formirani su u podnožjima brda, gravitacionim kliženjem i spiranjem fragmenata ovih minerala iz eluvijalnih i deluvijalnih ...
    ... fragmenata plemenitih silicijskih minerala, nesortiranih po krupnoći. Aluvijalni nanosi sa sadržajem pomenutih plemenitih silicijskih minerala formirani su u koritima reka i potoka. Njima pripadaju pojave Svinjarički i Kamenički potok. Plemeniti silicijski minerali koji potiču iz prethodno opisanih ...

  • Geološke karakteristike i praktični značaj nalazišta juvelirskih mineralnih sirovina Fruške gore

    Zoran Ž. Miladinović (2005)
    Geološke karakteristike, juvelirsi minerali, Fruška gora

  • Geološke karakteristike nalazišta juvelirskih mineralnih sirovina Šumadijskog mineragenetskog rejona

    Lidja Marčeta (2005)
    Geološke karakteristike, juvelirski minerali, Šumadija

  • Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog

    Maja Milošević D. (2016)
    minerali glina, metilen plavo, difuzna refleksija, adsorpcija, flokulacija

  • An update on the mineral-like Sr-containing transition metal arsenates

    Tamara Đorđević, Ljiljana Karanović (2021)
    We report on the crystal structures of three novel synthetic SrM-arsenates (M = Ni and Fe3+), isostructural or structurally related to the minerals from tsumcorite, carminite and brackebuschite groups. They were synthesised under mild hydrothermal conditions and further characterised using single-crystal X-ray diffraction (SXRD), scanning electron microscopy with energy dispersive spectroscopy (SEMEDS) and Raman spectroscopy. SXRD and SEM-EDS yielded formulae: (I) SrNi2(AsO4)2·2H2O, (II) Sr1.4Fe3+ 1.6(AsO4)2(OH)1.6 and (III) SrFe3+(AsO4)(AsO3OH). All three structures are built up of slightly distorted MO6 octahedra ...
    арсенати метала, кристална структура, дифракција рендгенских зрака на монокристалима, хидротермална синтеза, Раманова спектроскопија, релевантна једињења у животној средини, арсенeochemistry and Petrology

  • Mineralno-sirovinska baza SAP Kosovo kao faktor privrednog razvoja i njena kompleksna geološko-ekonomska ocena

    Petar Radičević (1975)
    Minerali, SAP Kosovo

  • Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)

    Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)
    The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...
    Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD
    ... Air. Mineral. Petrol. 1998, 62, 123-144. [CrossReft] Crystals 2023, 13, 278 l1of1l 24. 25. 26. 27. 28. Schaufuss, A.G.; Nesbitt, H.W.; Scaini, M.J.; Hoechst, H.; Bancroft, M.G.; Szargan, R. Reactivity of Surface Sites on Fractured Arsenopyrite (FeAsS) toward Oxygen. Am. Mineral. 2000 ...
    ... FeAsS; crystal structure; oxidation; XRPD; TEM 1. Introduction Arsenopyrite (FeAsS) is worldwide abundant natural sulphide, common in various mineral deposit types [1]. Arsenopyrite can incorporate significant amounts of metal ions, such as gold, cobalt, and nickel, either accommodated in the crystal ...
    ... so- lution or as micro-inclusions [2,3]. In particular, the ability of the Au incorporation renders arsenopyrite an economically relevant ore mineral and is the main reason for the extensive industry-driven research. Subjected to exploration and mining activities, arsenopyrite is also one of ...