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Упит dcterms_subject_txt:moisture content

472 items

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... the initial institutions involved, it is expected that this network will also attract a wider range of universities and enterprises to offer OER content within additional network nodes, which they would develop within their own institutions. In view of such a development, the BAEKTEL network features ...
    ... attract students and staff from other parts of the world. In this context, transparency will be increased by offering an insight in the academic content published by different academic institutions, helping prospective students to make their choice of the university that best suits their needs. ...
    ... features a web application for management, browse and search of metadata, but also web services for terminological and linguistic support. Since OER content within the network can be published in different languages, the web application and web services support network multilinguality. Other various ...

  • Surface functional groups and degree of carbonization of selected chars from different processes and feedstock

    Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)
    The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...
    Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS
    ... Hamburg, Ger- many, in an ablative reactor at 500 "C with a contact time of < 2 s from chopped spruce (Picea spec.) wood chips after drying to a moisture content of less than 10% [67]. HW500f was pro- duced by fast pyrolysis of hard wood in a fluidized bed reactor at 500 "C with a contact time of < ...
    ... for the characterization of biochars made by pyrolysis and hydrochars, but requires elaborate protocols and the adjustment of reproducible moisture content, because OH bands are strongly affected by the presence of water. Like XPS, FT-IR cannot discriminate alcohols from phenols and therefore cannot ...
    ... found for HW500f, which has also high ash content, with 104.9 + 1.4% for the sum of all deter- mined elements. The nitrogen content was below the detection limit for most of the chars and generally more than one order of magnitude lower than the oxygen content. Therefore, it does not play an important ...

  • Microemulsion with aromatic oil as cleaner media for electropolymerisation

    M. Ilić, F.-H. Haegel, S. Zlatanovic, N. Potkonjak, B. Simonovic (2005)
    Abstract Microemulsion polymerization is widely used as a cleaner alternative way to prepare intrinsically conductive polymers. We studied isothermal phase diagrams for microemulsions of the electropolymerizable heterocyclic aromatic oil 3,4-ethylenedioxythiophene (EDOT), aqueous LiClO4 solution and alkyl polyethoxylate. Our specific goal was to assess the effect of LiClO4 salt on the phase behaviour. The phase behaviour was characterized by stepwise titration and microscopic analyses. Here we found that the increase of the concentration of LiClO4 salt shifts the microemulsion region ...
    Микроемулзија, понашање фаза, EDOT, LiClO4

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography

  • Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides

    Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević (2021)
    ... coefficients showed an increment in S-metolachlor sorption with increasing the content of the organic complex used in the montmorillonite modification. Positive relationship between the parameter Kf and the content of the organic complex was found. A general trend of sorption can ...
    ... Serbia Presentation Preference: Poster only Would you like to receive more information about applying for a grant once this becomes available?: Yes Content: The mineralogical composition of the soil clay fraction, along with soil organic matter, plays an important role in the sorption process of the soil ...

  • Maceralni sastav i rang uglja Ibarskog basena

    Željana Novković, Nevena Andrić -Tomašević, Vladimir Simić, Dragana Životić (2022)
    Donjemiocenski ugljonosni Ibarski basen se nalazi u južnoj Srbiji. Intramontanski ektenzivni basen, izdužen u pravcu severozapad-jugoistok ispunjen je slatkovodnim sedimentima koji su formirani kao deo Dinarskog neogenog jezerskog sistema. Paleoreljef basena izgrađen je od paleozojskih amfibolskih škriljaca, sericit-hloritskih škriljaca, krečnjaka, mermera i metabazičnih stena, mezozojskih peščara, laporca, laporovitih krečnjaka, krečnjaka, dolomita, ofiolita i oligo-/miocenskih magmatskih stena. Tercijarne magmatske stene izgrađene su od oligocenskih dacito-andezita i neogenih kvarctlatita/riodacita i piroklastičnih stena. Miocenski sedimenti izgrađeni su od aluvijalnih breča, konglomerata, peščara, ...
    ugalj, macerali, refleksija vitrinita, Ibarski basen

  • Geotehnički efekti razaranja komunalnog otpada različitim postupcima zbijanja

    Jovana M. Janković Pantić (2022)
    Odlaganje otpada na komunalne deponije predstavlja osnovni način zbrinjavanja otpada u Srbiji. Kako bi se prostor za deponovanje materijala racionalno koristio potrebno ga je svakodnevno zbijati sa unapred definisanom količinom vode koja se dodaje. Dobro zbijeni komunalni otpad zauzima manju zapreminu i omogućuje sigurnije skladištenje, pa je korisno prethodno laboratorijski odrediti parametre zbijanja: maksimalnu suvu zapreminsku težinu (dmax) i optimalnu vlažnost (wopt). U Srbiji do sada nisu određivani parametri zbijanja, dok je u svetu primenjivana standardna metoda (Proktorov opit) ...
    komunalna deponija, zbijanje, Proktorov opit, malj sa šiljcima, koeficijent razaranja

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... The content of e-dictionaries for Serbian is given in more details. 4. The simple methods of pattern matching are presented. They are based on queries in the form of regular expressions whose basic elements are either word forms (strings) or lexical masks that refer to the content of e- ...
    ... three basic didactic criteria [15]:  adjusting the content to the target group,  systematization and gradualism in the teaching process,  connecting the theory and the practice. To satisfy the first criterion of adjusting the content to the target group, we provided a description of the ...
    ... The main features of Unitex, an open access and open source corpus processing system, are presented in Section 4. Section 5 presents course content with didactic criteria and specific formats used in the OER course. Concluding remarks and plans for further research are given in section 6 ...

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... peak at about 90 ◦C corresponds to the loss of moisture from lignite. In the presence of lignite, HDPE begins to melt at about a 5 ◦C lower temperature than during thermal decomposition of HDPE alone (Figure 1b,c). The result implies that release of moisture from the lignite that occurs before the melting ...
    ... reaches 35%. The low degree of lignite degradation is in accordance with the low content of OM (total organic carbon of 29.77% and hydrogen of 2.79%; Section 3.3), as well as a high content of mineral matter (ash content of 47.12%), which is relatively stable and not subjected to significant decomposition ...
    ... Figure 1a shows the TGA curve and derivative weight loss (DTG) curve of pre- extracted lignite. The first peak at 90.8 ◦C corresponds to loss of moisture. Degradation of OM starts at about 300 ◦C and the greatest weight loss is observed in the temperature interval between 400 and 500 ◦C, with the maximum ...

  • Korelacija magnetnog susceptibiliteta i sadržaja metala u flotacijskom jalovištu

    Filip Abramović, Vesna Cvetkov, Aco Ilić, Dragana Životić (2022)
    Procena metala u rudama, jalovištu i zemljištu se tradicionalno određuje hemijskim metodama kao što su Rengen fluorescentna analiza (XRF), Instrumentalna neutronska aktivaciona analiza (INAA) i Masena spektrometrija induktivno spregnute plazme (ICP-MS). Neke od pomenutih metoda su veoma zahtevne i skupe, te se nametnula potreba ka traženju jeftinijeg alata za brzu procenu prisustva pojedinih metala. Tokom poslednjih nekoliko decenija, mnoge studije su pokazale da su magnetna merenja dovoljno osetljiva da detektuju magnetni signal feromagnetnih materijala, a samim tim i metala ...
    flotacijsko jalovište, makroelementi, magnetna merenja

  • Human Hemoglobin and Antipsychotics Clozapine, Ziprasidone and Sertindole: Friends or Foes?

    Lena Platanić Arizanović, Nikola Gligorijević, Ilija Cvijetić, Aleksandar Mijatović, Maja Krstić Ristivojević, Simeon Minić, Aleksandra Nikolić Kokić, Čedo Miljević, Milan Nikolić (2023)
    Packed with hemoglobin, an essential protein for oxygen transport, human erythrocytes are a suitable model system for testing the pleiotropic effects of lipophilic drugs. Our study investi gated the interaction between antipsychotic drugs clozapine, ziprasidone, sertindole, and human hemoglobin under simulated physiological conditions. Analysis of protein fluorescence quenching at different temperatures and data obtained from the van’t Hoff diagram and molecular docking indicate that the interactions are static and that the tetrameric human hemoglobin has one binding site for ...
    Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Computer Science Applications, Spectroscopy, Molecular Biology, General Medicine, Catalysis

  • 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 ...

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... pile. The quality of lignite extracted in Serbia is characterized by large variations in moisture and ash content, resulting in variations in lower heating value. The sulphur content is low, as is iron content, while mercury is monitored only sporadically. [Stevanović et al., 2015]. Thus the ho ...
    ... the parameter of interest. Most often the parameters of interest are the lower heating value and sulphur content, but other parameters are also an option (iron or mercury content, ash content...) [Ignjatović et al. 2007]. When the anticipated quality range of the observed parameter is small, the ...
    ... quality attributes variability using properly designed blending piles. These models allow assessing the uncertainty associated with the attributes content in the ore. A software tool for the prediction of the coal blending efficiency in longitudinal stockpiles takes as input the standard deviation ...

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... significantly with increasing concentration of HDTMA+ cation. All these changes are related to the decreasing of the water content in the interlayer space by increasing the content of HDTMA. The occurrence of the stretching CH2 vibrations is generally the main difference in the spectrum of HDTMA modified ...
    ... infrared spectroscopy. IR bands observed in the inorganic modified montmorillonite (Na-montmorillonite) are typical for smectites with a high Al content in the octahedron position. The intercalation of HDTMA+ cations into the interlayer space produces redshift of the IR bands that originate from ...

  • Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

    Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)
    sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija
    ... calorific value, high-combustion waste content, the release of polluting gases (SOx, COx, PxOy, etc.) which may cause serious environmental problems (the greenhouse effect, soil or water contamination, etc.) [3]. The non-combustible part of lignite mainly consists of moisture and ash, of which about 85–95% is ...
    ... calorific value, high-combustion waste content, the release of polluting gases (SOx, CO,x, P,Oy, etc.) which may cause serious environmental problems (the greenhouse effect, soil or water contamination, etc.) [3]. The non-combustible part of lignite mainly consists of moisture and ash, of which about 85-95% ...
    ... of adhesion in mortars with a higher content of waste material is the lower quantity of free water necessary for the hydration of cement materials in the hardening period. Based on the results of concrete consistency testing, it can be concluded that as the content of waste material increased, the size ...

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема

  • Legal framework for recultivation of degraded areas caused by mining exploitation

    Radmila Gaćina (2023)
    Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...
    rekultivacija, melioracija, otkopavanje uglja, zakonska regulativa
    ... damage larger or smaller areas of land. Experiences show that land damage is significantly greater with the surface exploitation system, where the content of the space is degraded not only in the contour of the mine and the surrounding area, but changes are made in the natural flows and conditions ...
    ... of land reclamation. For agricultural land reclamation, especially after restoration of the original use of arable land, acceptance of the main content should include: reclaimed land area, surface cover thickness, ground slope and drainage function, the physical and chemical properties of the soil ...
    ... chnical and project documentation, and the scope of recultivation and rehabilitation works is also determined by the valid regulations on the content of project documentation. The set of laws in the field of environmental protection also includes the protection of land from physical degradation ...

  • Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species

    Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)
    Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...
    microstructure, microwave-hydrothermal synthesis, adsorption, magnetic nanoparticles, arsenic

  • Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis

    Dalibor Vorkapić, Aleksandra Tomašević, Miljana Mladenović, Ranka Stanković, Nikola Vulović (2017)
    U ovom radu predstavljen je model koji omogućava prikupljanje, pripremu, opis metapodataka, upravljanje i eksploataciju, uključujući pretragu punog teksta dokumenata iz domena kriminalistike napisanih na srpskom jeziku. Predloženi pristup primenjuje se na veb portalu koji sakuplja različite tekstove nastale iz časopisa Akademije za kriminalistiku i policijske studije, Krivičnog zakona Srbije, konferencija „Tara“ i „Reiss“, kao i iz nekih doktorskih disertacija vezanih za ovu oblast istraživanje. Nakon obrade teksta, korpus koji sadrži preko 5500 stranica običnog teksta, kreiran je i ...
    Omeka, Wordnet, pretraga punog teksta, morfološka i semantička pretraga teksta, proširenje upita
    ... digital objects management Omeka2, as a web publishing platform and a content management system (CMS) was selected. It is developed by the Centre for History and New Media (CHNM) at George Mason University specially for scholarly content, with an emphasis on digital collections and exhibits. While Omeka ...
    ... For each category or subcategory, it is possible to define a specific collection that will display the entire content of the collection. Apart from navigation and browsing of content, simple and advanced search are available. The administrator panel enables installing and customizing the appearance ...
    ... over 5500 pages of plain text is created and prepared for publication as an online resource for full text search using Omeka, an open source content management system for on line digital library development. Search capabilities, both full text and metadata search are customized and improved by ...