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Упит dcterms_subject_txt:Well Performance Optimization

297 items

  • Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia

    Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)
    Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... Geothermal potential, Serbia 1. INTRODUCTION The research community and the mining industry are making efforts to improve the environmental performance of mining operations by shifting to renewable energy. Previous studies showed that mineral exploration data and the expertise from the mining industry ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 9 International Conference MINING AND ENVIRONMENTAL PROTECTION ...
    ... data collected on exploring the "Valjevo" deposit. The emphasis was made on understanding the structural style and depth of the Miocene cover, as well as the spatial distribution of the estimated temperatures in the Triassic reservoir. Still, uncertainty remains about the hydraulic properties and ...

  • 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

  • The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje

    Boban Pavlović, Milica Pešić-Georgiadis (2019)
    In order to determine the solar energy potential for a specified location, it is crucial to consider the latitude, altitude, slope, terrain morphology, atmospheric conditions, etc. Such a complex calculation and mapping of solar energy can be done using the ArcGIS geoprocessing tool, named Area Solar Radiation (ASR). By using the ASR tool, supported with the adequate input data, it is possible to calculate the maximum solar radiation energy (irradiation) for a defined area and for a specified time ...
    Obnovljivi izvori energije, potencijal solarne energije, GIS, mapiranje solarnog potencijala
    ... (left) and July (right). r = Solar panel efficiency (%); H = Annual average solar radiation on tilted panels (shadings not included); PR = Performance ratio, coefficient for losses (range between 0.5 and 0.9). The factors for this equation Wwere determined in consultation with experts at the ...
    ... 2019). Based on these resources, NREL recommends these factors (US EPA, 2019): r = 15% solar panel efficiency of PV module, and PR = 86% performance ratio. [1 Tr Accepting the recommended values for and “PR”, and assuming that the solar panel area is 1 m”, the energy output from PV cells ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 12% International Conference on Energy and Climate Change, ...

  • 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

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)
    ... ), pp. 97-104. Krstev C., Stanković R., Vitas D., Obradović I., (2008) "The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines", in Proceedings of the Sixth Interantional Conference on Language Resources and Evaluation (LREC'08), Marrakech, Morocco ...
    ... with definitions for each entry, synonyms and bibliographical references, as well as equivalent terms and definition in other languages. GeolISSTerm supports semantic and multilingual expansions of the query, as well as multilingual map annotation. In the initial phase around 3,500 Serbian ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs GIS Application Improvement with Multilingual Lexical and ...

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)
    ... content and provides the infrastructure for successful search engine optimization of education resources published within BAEKTREL project. With variety of content and the expected growth of the number of resources, as well as different profiles of potential users, indexing of resources that ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs The Sixth International Conference on e-Learning (eLea ...
    ... valuable and beneficial institutional and pedagogical implications. When a large amount of OER is reached, it is even more important that they are well described and tagged in a standard way in machine readable form. In that case, results returned by search engines are more relevant, and both ...

  • Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara

    Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković (2020)
    Revitalizacija je proces ili skup tehničkih zahvata na mašini kojim se vrši zamena svih dotrajalih ili oštećenih delova metalne konstrukcije. Sastavni deo procesa revitalizacije je i modernizacija zastarele elektro-mašinske opreme. Principi revitalizacije sasvim sigurno nisu sadržani u okviru redovnog godišnjeg ili dnevnog održavanja. Oni predstavljaju održavanje onih veličina koje su značajne za mašinu kao celinu (u ovom slučaju rotorni bager). U ovom radu su analizirani rotorni bageri oznake SRs 1200. Na površinskim kopovima rudarskog basena Kolubara takvih bagera ima ...
    Rotorni bageri, revitalizacija, SRs1200

  • 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
    ... TR34013. Conflicts of Interest: The authors declare no conflict of interest. References 1. Vukojević Medvidović, N.; Perić, J.; Trgo, M. Column performance in lead removal from aqueous solutions by fixed bed of natural zeolite-clinoptilolite. Sep. Purif. Technol. 2006, 49, 237–244. [CrossRef] 2. Fu ...
    ... use as a catalyst support in methanol electro-oxidation. Catal. Commun. 2008, 10, 267–271. [CrossRef] 37. Isao, M.; Cha-Hun, K.; Yozo, K. Anodic Performance and Insertion Mechanism of Hard Carbons Prepared from Synthetic Isotropic Pitches. Carbon 2001, 39, 399–410. 38. Pathania, D.; Sharma, S.; Singh ...
    ... Davies, T.E.; Dimitratos, N.; Villa, A. Controlling the incorporation of phosphorus functionalities on carbon nanofibers: Effects on the catalytic performance of fructose dehydration. J. Carbon Res. C 2018, 4, 9. [CrossRef] 55. Wang, G.; Zhang, M.; Liu, S.; Xie, X.; Ding, G.; Wang, Y.; Chu, P.; Gao, H ...

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • 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
    ... cs Reviews 50(7), 413‐429. (на енглеском)  16. Barelli, L., Bidini, G., Pinchi, E.M. 2006. Implementation of a cogenerative district  heating: optimization of a simulation model for the thermal power demand. Energy &  Buildings 38(12), 1434–1442. (на енглеском)    Л ит ер ат ур а  ‐ 185 ‐    ...
    ... perturbation method. Applied Mathematical Modelling 20(4), 290–297. (на енглеском)  24. Benonysson, A., Bohm, B., Ravn, H.F. 1995. Operational optimization in a district heating  system. Energy Conversion & Management 36(5), 297–314. (на енглеском)  25. Bhave, P.R., Gupta, R. 2004. Optimal design  ...
    ... 48. Brkić, D. 2008b. Nonlinear‐programming offers way to optimize looped pipeline network  analysis – one improved method. Nonlinear Systems and Optimization Techniques,  научни скуп у организацији ЦАНУ, Будва, /in press/ (на енглеском)  49. Brkić, D. 2008c. Transportation: Serbian, Russian pipeline ...

  • 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
    ... cs Reviews 50(7), 413‐429. (на енглеском)  16. Barelli, L., Bidini, G., Pinchi, E.M. 2006. Implementation of a cogenerative district  heating: optimization of a simulation model for the thermal power demand. Energy &  Buildings 38(12), 1434–1442. (на енглеском)    Л ит ер ат ур а  ‐ 185 ‐    ...
    ... perturbation method. Applied Mathematical Modelling 20(4), 290–297. (на енглеском)  24. Benonysson, A., Bohm, B., Ravn, H.F. 1995. Operational optimization in a district heating  system. Energy Conversion & Management 36(5), 297–314. (на енглеском)  25. Bhave, P.R., Gupta, R. 2004. Optimal design  ...
    ... 48. Brkić, D. 2008b. Nonlinear‐programming offers way to optimize looped pipeline network  analysis – one improved method. Nonlinear Systems and Optimization Techniques,  научни скуп у организацији ЦАНУ, Будва, /in press/ (на енглеском)  49. Brkić, D. 2008c. Transportation: Serbian, Russian pipeline ...

  • Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series

    Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)
    Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...
    deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija
    ... 2007; pp. 857–862. 10. Merlini, D.; Falanesca, M. Ceneri Base Tunnel advancement in difficult rock conditions: Tunnel design and construction optimization through back-analysis of the geomechanical parameters. In Proceedings of the World Tunnel Congress 2013 Geneva Underground—The Way to the Future ...
    ... as a function of time and the face advance. A procedure based on analytical functions has been developed to support the prediction of the tunnel performance and surface movements. Merlini and Falanesca [10] illustrated the comparison between the prognosis and the crosscheck of the support methods and ...
    ... different fields, such as medicine, biology, genetics, finance, engineering and many others [15]. The basic concept of the singular spectrum analysis is well presented in the paper by Hassani et al. [16]. Energies 2021, 14, 3710 5 of 20 According to Equation (2), x and z coordinates of the marker m over ...

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... problem- solving process. It also offers suggestions and recommendations to the user which could contribute to the improvement of the overall performance of the mine ventilation system. 5. CONCLUSION In this paper first a hierarchical decomposition of the ventilation state evaluation analysis ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs VENTEX - EKSPERTNI SISTEM ZA ANALIZU RUDNIČKIH VENTILACIONIH ...
    ... mine ventilation system analysis used in the VENTEX system and it formalization using a modification of the object- oriented analysis model as well as the basic architecture of the system and outlines the main features of the implemented system. 1. INTRODUCTION One of the most important ...

  • Sistem poslovne inteligencije za upravljanje zaštitom na radu u rudarskoj industriji

    Ljiljana R. Kolonja (2016-09-23)
    Postojeća organizacija zaštite na radu na površinskim kopovima uglja često nije umogućnosti da blagovremeno i tačno ukaže na nedostatke, koji mogu u bližoj ilidaljoj budućnosti da budu uzrok narušavanja bezbednosti radnika, ali i uzrokoštećenja materijalnih dobara rudnika. Nemogućnost donošenja pravovremenihodluka je moguće izbeći uvođenjem softverski podržanih sistema za praćenje ianalizu bezbednosti i zaštite na radu.Osnovni cilj ove doktorske disertacije je definisanje metodologije i razvoj modelasistema upravljanja zaštitom na radu, koji će omogućiti savremen, adekvatan isveobuhvatan način praćenja i analize ...
    rudarstvo, bezbednost i zdravlje na radu, poslovna inteligencija,tehnička zaštita, ontologije
    ... n of modern information technologies, a complex and comprehensive analysis of collected data, the assessment of the performance of applied protection measures, as well as the advancement of the decision‐making process related to the improvement of applied and selection of new measures ...
    ... organizacija rada IMS ‐ Integrated management system ‐ Integrisani sistem upravljanja IT – Information technology ‐ Informacione tehnologije KPI ‐Key Performance Indicators ‐ Ključni indikatori poslovanja LMF ‐ Lexical Markup Framework ‐ Okvir za leksičko označavanje podataka MOLAP ‐ Multidimensional online ...
    ... omogući kreiranje fleksibilnih OLAP modela sa višenivoiskom hijerarhijom. Softversko rešenje sadrži alate za kalkulacije, KPI (Key Performance Indicators, ključne indikatore poslovanja), akcije, particionisanje, agregacije, itd. Opcija prelistavanja (browse) služi za pregled ...

  • Available technological procedures for capturing CO2 in the industrial and power generation sectors

    Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac (2021)
    Climate change is a major environmental issue caused by anthropogenic emissions of greenhouse gases. Capturing CO2 and storing it in suitable geological formations is one of the main technological solutions that can provide mitigation of CO2 emission into the atmosphere. Capturing CO2 represents the first phase in process of carbon capture and storage, and includes the application of various technologies for the separation of CO2 produced in the energy and industrial sectors. There are four main systems for capturing ...
    capturing CO2, power plants, CO2 capture systems, CO2 technologies
    ... gases are more soluble and pass through the membrane more rapidly 254 than others [29-30]. The parameters that influence gas separation performance are: membrane material, the share of CO2 in the mixture and the process conditions [21,29]. Increased concentration of CO2 in the mixture increases ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 249 8th International Conference MINING AND E ...

  • Permanent GNSS monitoring of landslide Umka

    Mileva Samardžić Petrović, Jovan Popović, Uroš Đurić, Biljana Abolmasov, Marko Pejić, Miloš Marjanović (2020)
    Клизиште Умка је једно од највећих насељених активних клизишта у Србији. Активност клизишта Умка се прати већ више од 85 година, различитим геотехничким и геодетским техникама. Од 2010. године, активност kлизишта се континуирано прати у реалном времену аутоматизованим перманентним системом за праћење базираним на Глобалним навигационим сателитским системима (ГНСС). Поред тога, од 2018. године активност клизишта се додатно прати кинематичким ГНСС одређивањем положаја скупа карактеристичних тачака као и применом UAV фотограметрије. Главни циљ овог рада је приказ резултата опажања три ...
    клизиште, перманентно праћење, ГНСС
    ... Research: Proceedings of the 3rd Regional Symposium on Landslides in the Adriatic Balkan Region, 2017, pp. 65-71. [2] A. Cina and M. Piras, M., “Performance of low-cost GNSS receiver for landslides monitoring: test and results”, Geomatics, Natural Hazards and Risk, vol. 6(5-7), pp. 497- 514, 2015. ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 91 PROCEEDINGS OF INTERNATIONAL CONFERENCE ON CONTEMPORARY ...
    ... system in real time. Furthermore, since 2018 landslide activity has been monitored by GNSS kinematic positioning of a set of characteristic points as well as by UAV (Unmanned Aerial Vehicle) photogrammetry. The main issue of this paper is the presentation of the results gained with GNSS kinematic positioning ...

  • Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje

    Stevan Đenadić, Aleksandar Mirković, Veljko Rupar (2024)
    Proces donošenja odluka u oblasti rudarstva i geologije uslovljen je blagovremenim posedovanjem kvalitetnih podataka i informacija. Kompleksnost rudarskih procesa nalaže prikupljanje podataka na dnevnom odnosno na smenskom nivou. Podaci kao takvi bez analitičkog pristupa nisu dovoljni. Kako bi pristup podacima bio brz i efikasan neophodno je posedovanje adekvatnog digitalnog rešenja uz adekvatne centralizovane baze podataka. U ovom radu je dat pregled trenutne pozicije rudarstva sa aspekta digitalne transformacije kao i predlog jednostavnog prototipa u obliku digitalnog sistema za poslovno ...
    rudarstvo, digitalna transformacija, baze podataka
    ... ovih rešenja je da, na osnovu raspoloživih podataka i primenom analitičkih procesa, pruže informacije o ključnim pokazateljima učinka (engl. Key Performance Indicators) definisane za poslovnc procese od interesa, kao i da omogući nesmetan pristup operativnim podacima. Ovakvi sistemi obično su propraćeni ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 160 INTERNATIONAL CONFERENCE OMC 2024 XVI MEĐUNARODNA ...
    ... appropriate centralized databases. This paper provides an overview of the current position of mining from the perspective of digital transformation, as well as a proposal for a simple prototype in the form of a digital system for business reporting and analytics. Keywords: mining, digital transformation ...

  • Parametri zbijanja komunalnog otpada određeni različitim laboratorijskim metodama

    Jovana M Janković Pantić, Dragoslav R Rakić, Irena G Basarić Ikodinović, Tina D Đurić, Snežana Bogdanović (2021)
    Zbijanje komunalnog otpada predstavlja jednu od osnovnih faza korišćenja komunalne deponije. Zbog toga je kao i kod drugih nasutih građevina, veoma korisno odrediti parametre zbijanja: maksimalnu suvu zapreminsku težinu (dmax) i optimalnu vlažnost (wopt). Dobijeni rezultati mogu da posluže prilikom projektovanja kapaciteta deponije kao i prilikom definisanja obradivosti otpada. U dosadašnjoj praksi najčešći način određivanja parametra zbijanja je standardna metoda (Proktorov opit) koja se koristi u mehanici tla, uz eventualnu redukciju energije zbijanja. Međutim, različiti tretmani komunalnog otpada na ...
    deponija komunalnog otpada, zbijanje, Proktorov opit, malj sa šiljcima
    ... Properties of Fresh Municipal Solid Waste Landfill in India, 7Ћ lInternational Conference on "Experiments/Process/System/Modeling/Simulation /Optimization, Афепз, Greece Vol. 2017. Pulat H.F., Yukselen-Aksoy Y.: Сотраспоп behavior of synthetic and nmatural MSW хатрјек in difjeremt compositions ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs БАУЕ7, GRAĐEVINSKIH INŽENJERA SRBIJE UDK: 624(059) ISSN 0352-2733 ...
    ... maximum dry unit weight (ydmax) and optimal moisture content (Wopt). The obtained results can be изед in designing the capacity ог the landfill as well as when defining the workability of waste. In current practice, ће most common method ог determination compaction parameters is by standard method ...

  • OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian

    Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević (2024)
    Ovaj rad predstavlja novi jezički resurs za pretraživanje i istraživanje verbalnih aspektnih parova u BCS (bosanskom, hrvatskom i srpskom), kreiran korišćenjem principa Lingvističkih Povezanih Otvorenih Podataka (LLOD). Pošto ne postoji resurs koji bi pomogao učenicima bosanskog, hrvatskog i srpskog kao stranih jezika da prepoznaju aspekt glagola ili njegove parove, kreirali smo novi resurs koji će korisnicima pružiti informacije o aspektu, kao i link ka aspektnim parovima glagola. Ovaj resurs takođe sadrži spoljne linkove ka monolingvalnim rečnicima, Wordnetu i BabelNetu. ...
    aspekt glagola, lingvistički otvoreni podaci, BCS

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology