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446 items

  • Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2

    Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)
    Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... of different ruthenium isotopes ranging from 96Ru to 104Ru. The original [RuCl2(bipy)2]Cl (mass 519.8) is apparently converted in the aqueous environment into a new species (mass 569.3), replacing all chloride anions with one more bipy ligand.27 The presence of this peak groups does not disturb ...
    ... abundance of different ruthenium isotopes ranging from °°Ru to '!“Ru. The original [RuCl(bipy)sJCl (mass 519.8) is apparently converted in the aqueous environment into a new species (mass 569.3), replacing all chloride anions with one more bipy ligand.*’ The presence of this peak groups does not \s A 490.3 ...
    ... is mainly due to the presence of a single tryptophan residue (Trp3) which is located on the surface of the enzyme molecule and exposed to the environment.39 All fluorescent spectra of PLA2 solution were recorded in the presence of increasing concentrations of metal complexes. The resulting fluorescent ...

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... ACT_ part1_ v14. pdf. Accessed 2 Aug 2019 European Heat Pump Association (2017) Large scale heat pumps in Europe. Industrial & Commercial Heat Pump Working Group (ICHP). https:// www. ehpa. org/ filea dmin/ red/ 03._ Media/ 03. 02_ Studi es_ and_ repor ts/ Large_ heat_ pumps_ in_ Europe_ MDN_ II_ final4_ ...
    ... essential for ensuring reliable and affordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import depend- ency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a ...
    ... should be directed toward ensuring reliable and affordable energy services, provided with reduced consumption of energy sources, impact on the environment and import dependency (United Nations 2019). Transition to more sustainable systems can be achieved by acting on the demand and supply sides. In ...

  • Age and microfacies of oceanic Upper Triassic radiolarite components from the Middle Jurassic ophiolitic mélange in the Zlatibor Mountains (Inner Dinarides, Serbia) and their provenance

    Hans-Juergen Gawlick, Nevenka Đerić, Sigrid Missoni, Nikita Bragin, Milan Sudar, Divna Jovanović (2017)
    Neo-Tethys, trench-like basins, synorogenic deposition, evolving thrust belt, Triassic palaeogeography
    ... analysis of both radiolarites and limestones provides information about their depositional setting (e.g., relative water depth, transport regime, environment — e.g., bioturbating biota, oxygen con- tent) and diagenetic overprint. Whereas microfacies analysis of limestones is a common tool to describe ...
    ... remain rare (e.g., Gawlick et al. 2009a, 2016a,b; Krische et al. 2014; Gawlick & Missoni 2015), but the recon- struction of the depositional environment of radiolarites pro- vides a number of answers for the open questions. The investigations of the resedimented Late Triassic oceanic ribbon ...
    ... (Triassic open lagoon, reef belt and transitional facies) is not possible due to the missing facies transitions from the lagoon to the open marinc environment. b — Middle Jurassic westward directed ophiolite obduction, imbrication of the former passive margin and mćlange for- mation. For the position ...

  • 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

  • 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
    ... РГФ] Mesozoic carbonate rocks in Serbia used as dimension stone | Vesna Matović, Tijana Vojnović Ćalić | Bulletin of Engineering Geology and the Environment | 2016 | | 10.1007/s10064-015-0722-0 http://dr.rgf.bg.ac.rs/s/repo/item/0008250 Дигитални репозиторијум Рударско-геолошког факултета Универзитета ...
    ... Geoinstitut, Beograd, Posebna izdanja 18: 25—26 (in Serbian) Sudar MN, Gawlick HJ, Lein R, Missoni S, Kovacs S, Jovanović D (2013) Depositional environment, age and facies of the Middle Triassic Bulog and Rid formations in the Inner Dinarides (Zlatibor Mountain, SW Serbia): evidence for the Anisian ...

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... efficiency and economics of adsorption processes such as pressure/temperature swing adsorption. [32] Metrics for adsorption capture include high working capacity and selectivity, low cost, low regeneration requirements, long-term stability, and fast kinetics. Although adsorption- based separation ...
    ... () where w' input indicates the required power into the system per unit mass. This power input is supplied at the pumps to boost the CO2, the working fluid, and the heating medium: W'input= Žiw'pumpcoz, IL+ zl·W-pumpworking fluid. | + zl·W-pumphcaling medium»(sw) i (4) The thermal efficiency ...
    ... and storage has advanced over the years on a small and large scale purposely to remove CO» emissions from the atmosphere to have a sustainable environment and to mitigate global climate crises. Research in this work will provide a comprehensive and detailed information regarding the analysis of ...

  • E-Connecting Balkan Languages

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Svetla Koeva (2009)
    In this paper we present a versatile language processing tool that can be successfully used for many Balkan languages. This tool relies for its work on several sophisticated textual and lexical resources that were developed for most of Balkan languages. These resources are based on several de facto standards in natural language processing.
    Query expansion, e-dictionary, wordnet, proper name, aligned text
    ... also to another language. If the first language is Serbian, the second language can be English, Bulgarian, or any other. A user can choose two working languages by adjusting parameters in the “Preferences” manu of WS4LR. Besides, WS4LR provides further possibilities for a user to control the ...
    ... forms of plural: putevi and puti. The second one is restricted to poetical usage and a user can choose to delete it from the expended query if the working text is not of that kind. Figure 2. The original query keyword glava is shown in the upper left corner. The chosen query expansions are shown ...
    ... entries. 4. Additional Possibilities We have illustrated in the previous section by the Serbian and Bulgarian pair the functions of WS4LR for working with aligned texts. It can be successfully used for other Balkan languages as well. Wordnets were being developed through Balkanet project ...

  • Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”

    Aleksandar Milutinović, Aleksandar Ganić, Thamer Rayes Diyab, Rade Tokalić, Meri Ganić (2015)
    ... Department Belgrade – Serbia aleksandar.ganic@rgf.bg.ac.rs Thamer Rayes Diyab Dr.Lecturer University of Babylon College of Engineering Faculty of Environment Engineering Babylon - Iraq tdiyab@ymail.com Rade Tokalic Associate professor University of Belgrade Faculty of Mining and Geology Mining Department ...
    ... during setting out of traverse points in form of errors in setting out direction angles and error in setting out lengths of traverse legs. The environment enables the use of total station when setting out the designed mine chambers, i.e. of the mine traverse. When carrying out the a priori accuracy ...

  • Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research

    Mirko Petković, Vesna Cvetkov, Branislav Sretenović (2014)
    магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија
    ... sulphide groups, either organic or inorganic in origin, which cause a diff erence in the magnetic susceptibility of archaeological objects and the environment that surrounds them. The best responses to magnetic data are pro- vided by materials that have been exposed to high temperatures, i.e. those that ...
    ... navigation systems do not satisfy the accuracy required by archaeolog- ical research. In addition, their accuracy is directly aff ected by the environment and the weather. 109 Archaeology and Science 10 (2014)Petković et al - Advantages and Disadvantages of a Parallel...(93-110) BIBLIOGRAPHY ...

  • Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software

    Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić (2024)
    The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...
    optimizacija, 3D model, bušenje, miniranje, O-Pitblast, softver

  • Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine

    Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)
    Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer
    ... ty engineering are focused on minimizing the cost of ownership [15]. It contains a logistic component of maintainability and impact of the working environment in technical, functional, legal, administrative, financial, and any other ways [16]. These partial availability indicators are of hybrid nature ...
    ... and service environment) coordinates. Partial indicators are reliability, convenience of maintenance from the construction point of view, convenience of maintaining from the logistical point of view, functionality and adaptability, safety (the level of risk to the work and environment). Regardless ...
    ... mathematical model for the assessment of availability based on expert judgment. The model will be shown in the case study (on the example) of bulldozers working in the open-pit lignite mine. Keywords: availability; fuzzy theory; AHP multi-criteria analysis; expert judgment; bulldozer 1. Introduction Various ...

  • A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...
    Proizvodnja električne energije, Obnovljivi izvori energije, Višekriterijumsko odlučivanje, Srbija
    ... can bring more sig- nificant reductions in greenhouse gasses (GHG) emissions, there is still a negative impact on the environment. When assessing this negative impact on the environment, it is important to evaluate RESs from a lifecycle perspective and to consider emissions in the fuel chain and the m ...
    ... Taiwan’s energy sector. The results showed that hydropower, solar energy, and wind energy will contribute to meeting the 3E policy goals (energy, environment, economy). The new fuzzy integrated Delphi-FAHP-PROMETHEE method- ology has been applied (Seddiki and Bennadji, 2019) with the objective to select ...
    ... delivered’’ (IPC, 2014), measured in kg of carbon dioxide (CO2) - equivalents (CO2eq/MWh), is introduced as a measure of RESs’ negative impact on the environment. As a literature source for values of lifecycle emissions indica- tor, data from the Fifth Assessment Report of the Intergovern- mental Panel on ...

  • Electronic Dictionaries - from File System to lemon Based Lexical Database

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Mihailo Škorić (2018)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    ... synchronized with other users in real time. Thus, we decided to develop a web ap- plication for dictionary management, and enhance the de- velopment environment from singe-user to multi-user. In addition to that, LeXimir did not offer support for complex constraints that the development of large dictionaries ...
    ... dictionary management LeXimir, in order to sup- port parallel development for a certain period of time, and to enable smooth transition of development environment. The database contains all currently used markers, but these markers have not a “flat” structure anymore, but rather a hierarchical structure ...
    ... lemon model, as well as its application for mi- grating electronic morphological dictionaries from a single- user file system to a multi-user environment based on a re- lational database management system. The new lexical data model implemented as a lexical database has various advan- tages over ...

  • Површинско распадање керсантита из Тешића мајдана у корелацији са начином обраде на примеру малог степеништа (Београдска тврђава)

    Невенка Новаковић (2024)
    Архитектуру Београда на прелазу 19. у 20. век обележила је употреба керсантита из каменолома Тешића мајдана. Kao камен високих декоративних својстава, керсантит је коришћен за јавне споменике, делове или потпуну изградњу објеката (Народна скупштина Србије, Мало степениште, Народни музеј и др.). Како очување споменика културе изискује познавање својстава уграђеног камена, истраживања су обухватила детаљно проучавање петролошких, хемијских и физичких карактеристика керсантита из Тешића мајданa и узорака камена из споменика Мало степениште (студија случаја). Након детаљног мапирања стања керсантита, лабораторијских ...
    керсантит, Мало степениште, споменик културе, архитектонски камен, физичко-хемијско распадање, мапирање, форме распадања, површинска обрада

  • English for Geology Students. 1

    Lidija Beko (2023)
    Engleski jezik
    ... -crystals https://en.wikipedia.org/wiki/\ Cave_of_the_Crystals https://www.britannica.com/'science/: gypsum https://www.bbc.com/news/science–environment·39013829 == __A _– — ——— The Naica Caves, Chihuahua, Mexico 17 ...

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • Uniaxial compressive strength test before and after standard fire test on rock mass

    Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)
    ... number and arrangement of cracks and fissures. For the same rock, strength may be different, depending on physical characteristics. Heat of environment can affect structure of rock mass, which results in a change in uniaxial compressive strength of rock after fire. Uniaxial compressive strength ...