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Упит dcterms_subject_txt:Standards for LRs

1390 items

  • 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)
    ... of S-metolachlor was highest for HDTMA-montmorillonite with 1CEC saturation.  High sorption of examined herbicides on some organically modified montmorillonites creates an opportunity for application of these substrates as potentially useful material for removal of S-metolachlor ...
    ... faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Call for contributions Clean water and sanitation & Life on land Linking soil mineralogy to soil properties and functions EUROSOIL2020CONT-1798 CHARACTERIZATION ...
    ... AND POSSIBLE UTILIZATION IN SORPTION OF THE HERBICIDES Lazar M. Kaluđerović* 1, Zorica P. Tomić1, Rada Đurović-Pejčev2, Maja Milošević3 1Department for Soil Management, Faculty of Agriculture/ University of Belgrade, 2Laboratory of Chemistry, Institute of pesticides and environmental protection, 3Department ...

  • Analysis and visualization of geophysical well-logging data from closely spaced boreholes

    Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov (2024)
    Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...
    well-logging in karst, water loss, data correlation, data fusion
    ... hazard assessment for large objects such as dams (Sretković and Vučković, 2020). 'The use of geophysical characterization of karst systems can provide an economical and non-invasive alternative _ for · extracting information about #cavities, · sinkholes, pathways for water “ infiltration ...
    ... survey was carrled out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis and visualization that differs from the standard logging ...
    ... OLIIIITHHA HOBALIH Hristina Petrova, Pera Stojkovska, Dimitar Petrov 114 117 125 133 139 148 156 10. HYDROGEOLOGICAL RESEARCH FOR THE WATER SUPPLY NEEDS OF THE CITY OF SREBRENIK, BOSNIA AND HERZEGOVINA Meris Hajdarević, Dinka Pašić-Škripić, Izet Žigić O GG 160 MEPKH H AKTHBHOCTH ...

  • Geodynamics of basins above subducted slabs: An integrated modelling study of tectonics, sedimentation, and magmatism in the Timok Magmatic Complex

    Uros Stojadinovic, Marinko Toljic, Branislav Trivic, Radoje Pantovic, Danica Sreckovic-Batocanin, Nemanja Krstekanic, Bojan Kostic, Milos Velojic, Jelena Stefanovic, Nikola Randjelovic, Maja Males (2024)
    Timok Magmatic Complex, Neotethys subduction, basin geodynamics, analogue modelling

  • Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)

    Dušan Polomčić, Dragoljub Bajić, Jelena Zarić (2015)
    A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...
    Water supply, Aquifer, Flow, Groundwater regime, Numerical modeling, Particle tracking
    ... mean monthly precipitation levels for the period from 1996 to 2006. Figure 8. Mean monthly precipitation levels for the period 1996-2006 Model calibration The model was calibrated under the conditions of transient flow, with a time step of seven days for the study period (January 1 to December ...
    ... protection zone [13]. Particle tracking can be used for various purposes. The backward particle tracking method with an uncertainty analysis of porosity, applying a Monte Carlo approach, with Geographic Information System (GIS) support, is a useful tool for delineating groundwater protection zones [14] ...
    ... geometry, hydraulic interactions and physico chemical characteristics of the water. The reason for this is the evolution of the terrain, or, more precisely, there are lacustrine, bog and riverine sediments for which there are no reliable data about horizontal and vertical distributions and interbeds ...

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... (no rotation), 5◦ and 10◦ respectively. d) Setup cross-sections for brittle-only and brittle-viscous experiments in Fig. 2a and b. e) Strength profile for brittle-only experiments. f) Strength profile for brittle-viscous experiments. (For interpretation of the references to colour in this figure legend ...
    ... threshold filter, followed by a visual inspection for remaining outliers and their manual removal and interpolation of displacements in basin areas for time frames when sedimentation is applied (i.e., only for few time frames in a model). Displacements for these time frames are interpolated taking di ...
    ... and to allow for sectioning of the experiments to obtain information on the internal structures. We monitor surface deformation by taking top-view photographs (by using Panasonic Lumix DC-G9 with 20.3 megapixels for models 1–6 and 10–12 and Canon EOS 700D with 18.0 Megapixels for models 7–9) at ...

  • Wells calculation for the protection of opencast mine Radljevo North from groundwater

    Dušan Polomčić, Vladimir Petković, Miloš Jeremić (2018)
    Za projektovanje kvalitetnog sistema zaštite jednog površinskog kopa od podzemnih voda bitno je da ulazni podaci budu verodostojni, kako bi se na osnovu njih izvršili potrebni proračuni objekata odvodnjavanja podzemnih voda. Proračunima za površinski kop Radljevo Sever je omogućeno da se dobije potreban broj bunara kako bi oni pravilno funkcionisali i obezbedili potrebno obaranje podzenih voda.
    Radljevo, ugalj, odvodnjavanje, bunari

  • Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)

    Ljiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Development and Application of Methodology for Quantification of Overbreaks in Hard Rock Tunnel Construction

    Zoran Berisavljević, Dragoljub Bajić, Vojkan Jovičić (2023)
    A methodology for determining overbreaks in hard rock tunnel construction using the drill-and-blast technique is presented in this paper. The methodology was developed for and applied to crystalline medium- to thick-bedded limestone, but it can be used in any jointed hard rock mass. Overbreaks are inevitable in hard rock tunnelling in a low-confinement environment (shallow tunnels up to several hundred meters deep) as a result of wedge failures along unfavourably oriented discontinuities caused by blasting. It is widely accepted ...
    hard rock, drill-and-blast, geological overbreak, technological overbreak, stability criterion, discontinuity orientation, tunnel construction

  • Примена ауторегресионих модела за потребе краткорочних прогноза истицања карстних врела

    Вељко Мариновић, Весна Ристић Вакањац, Саша Милановић, Љиљана Васић, Бранислав Петровић, Душан Поломчић, Радисав Голубовић (2023)
    Модел вишеструке линеарне регресије је најчешће примењивани модел за симулације, односно прогнозе одговарајућих случајно променљивих величина. Као најједноставнији модели примењују се ауторегресиони (АР) модели који симулирају истицање карстних врела на основу издашности врела регистрованих претходних дана. АР модели примењени су на примерима Великог врела за шестогодишње периоде осматрања, односно врела Бање и Гостиљског врела за десетогодишње периоде осматрања. Укључивањем више независних величина, коефицијенти корелације безначајно расту, те је препорука да се максимално 3 независне променљиве укључе у симулациони модел. ...

  • 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

  • Application of Membrane Technology for Separation CO2 from Natural Gas

    Lola Tomić, Dušan Danilović, Vesna Karović Maričić, Branko Leković, Miroslav Crnogorac (2020)
    Natural gas consists of a mixture of hydrocarbons with the largest share of methane, and non-hydrocarbon impure components such as N2, CO2 and H2S. In order to fulfill the gas market requirements, it is necessary to separate these unwanted components from the natural gas stream. There are several available technologies for the separation of CO2 from natural gas, such as: polymeric membranes, cryogenic distillation, absorption and adsorption. In this paper is presented the mechanism of CO2 separation using membrane technology, ...
    separacija CO2, polimerne membrane, membranski moduli

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... at the University of Belgrade, Faculty of Mining and Geology. Conditions for microanalysis were spot size 2 µm, an accele- rating voltage of 30 kV and a beam current of 10 nA, using natural and synthetic mineral standards including albite (Al, Si), wollastonite (Ca), titanium monoxide (Ti), chromium ...
    ... 02668 Wiedenbeck M.P., Corfu A.F., Griffin W.L., Meier M., Oberli F., von Quadt A., Roddick J.C. & Spiegel W. 1995: Three natural zircon standards for U–Th–Pb, Lu–Hf, trace element and REE analyses. Geostandards and Geoanalytical Research 19, 1–23. https://doi.org/10.1111/j.1751-908X.1995 ...
    ... responsible for andradite rim. The magmatic origin of sulphur was already previously confirmed by the uniform values of isotope analyses obtained for various sulphide minerals in the Rudnik skarn deposit: δS34 = +3.1 ± 0.3 ‰ for sphalerite, +3.0 ‰ for pyrrhotite, and +3.3 ± 0.6 ‰ for chalcopyrite ...

  • FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... the range of 4000-450 cm'!, at a resolution of 4 cm"! with corrections for the effect of the radiation wavelength on the penetration depth. Fora better interpretation of the absorption bands, second derivatives were obtained for all samples. RESULTS AND DISCUSSION FTIR spectroscopy of samples without ...
    ... remove organic matter from the sample. 330 SERBIAN SOCIETY OF SOIL SCIENCE Soils for Future under Global Challenges After air drying, montmorillonite was saturated with 1 M NaCI, and lefton a mechanical shaker for 24 h, centrifuged and rinsed with distilled water until the negative reaction on ...
    ... Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević | Book of Proceedings / 3rd International and 15th National Congress Soils for Future Under Global Challenges, 21-24 September 2021 Sokobanja, Serbia | 2021 | | http://dr.rgf.bg.ac.rs/s/repo/item/0008140 Дигитални репозиторијум ...

  • Crystal structure of K3EuSi2O7

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu
    ... from 0.983 Å for VINd3+ to 0.868 Å for VIYb3+ (VIEu3+ = 0.947 Å).26 The structure of these compounds contains the rare-earth cation in both a slightly distorted octahedral and an ideal trigonal prismatic coordination environment. SUPPLEMENTARY MATERIAL The crystallographic data for this paper ...
    ... was from 3 to 60° 2θ, with a step size of 0.02° and time per step of 1.25 s. PDXL 2 software18 was used for the powder diffraction data analysis. Scanning electron microscopy (SEM) was used for the morphological characteriza- tion. The analyses were carried out on a single crystal using a JEOL JSM-6610LV ...
    ... O2‒ in structure. Only the bond-valence sum for Eu1 is oversaturated (3.42 v.u.) which can be attributed to the environment of the Eu1O6 octahedron. All oxygen atoms from Eu1O6 octahedron are common to all adjacent polyhedra around the K1 and K2 atoms for which BVS shows slightly undersaturated values ...

  • Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization

    Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić (2016)

  • AR, CR and ARCR modeling for simulations and analyses of karst groundwater quality parameters

    Vesna Ristić-Vakanjac, Marina Ćokorilo-Ilić, Petar Papić, Dušan Polomčić, Radisav Golubović (2018)
    Although an invisible component of the hydrologic cycle, groundwater generally takes precedence over other water resources in the area of drinking water supply. Among groundwater resources, karst aquifers tend to be rich in sufficiently-accessible amounts of high-quality water. During most of the year, this water requires only disinfection prior to delivery to the end user. However, in many cases extreme rainfall and/or sudden snow melt results in transient turbidity, increase in bacterial count and temporary contamination (e.g. increase in ...
    autocorrelation, cross-correlation, autoregressive model, cross-regressive model, autocross regressive model, nitrates, Banja Spring, Serbia.

  • Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin

    Angelina Petrović, Aleksandar Mijatović, Rada Baošić, Jovana Bogojeski (2018)
    Joni prelaznih metala u kombinaciji sa različitim ligandima nude veliki broj mogućnosti za ispitivanje potencijalnih bioaktivnosti. Među jonima prelaznih metala, bakar je poznat kao endogeni metal za ljude, sa karakterističnim biološkim redoks aktivnostima i relativno jakim afinitetom za nukleobaze. Kompleksi bakra ispoljavaju svoju antitumornu aktivnost na nekoliko različitih načina, generišu veliku količinu ROS, što uzrokuje oksidativno oštećenje mitohondrija i biomakromolekula. Nađeno je da kompleksi bakra(II) imaju umeren do dobar afinitet vezivanja sa DNK, uglavnom putem interkalacije.

  • KINDRA project – knowledge inventory for hydrogeology research

    Vesna Ristić Vakanjac, Zoran Stevanović, Bojan Hajdin, Marina Čokorilo Ilić, Veljko Marinović (2017)
    baza podataka, inventar, hidrogeologija

  • Developing Students’ Mining and Geology Vocabulary Through Flashcards and L1 in the CLIL Classroom

    Lidija Beko, Ivan Obradović, Ranka Stanković (2015)
    ... of L1 is necessary for further elaborations Questions related to L1 usage 1 2 3 4 5 Concerning why the use of Serbian was necessary, students answered as follows (see Figure 3): for explaining new words (Q1), majority think that L1 plays a facilitating role (51.61%), for explaining the d ...
    ... that L1 has a more supportive role (45.16%), for giving feedback to errors (Q3), students generally prefer greater use of L1 (44.09%), for checking comprehension (Q4), students believe that the native language outweighs the foreign language (52.69%), for additional elaborations (Q5), students find ...
    ... also select the answers which are to be included into a central terminology database provided that they satisfy previously established quality standards. This allows the database to be continually enriched, always adhering to certain quality criteria. Our programming solution has been developed ...

  • Ground surface subsidence monitoring using sentinel-1 in the “Kostolac” open pit coal mine

    Zoran Gojković, Milan Kilibarda, Ljiljana Brajović, Miloš Marjanović, Aleksandar Milutinović, Aleksandar Ganić (2023)
    Open pit coal mining affects surrounding populated areas, resulting in terrain surface deformation. Surface deformation should be monitored as often as possible to control deformations and prevent potential incidents. This paper analyzes time series deformation estimated from the Sentinel-1 satellite images using the Persistent Scatterer Interferometry method to monitor subsidence rates caused by open pit mining activities. It is possible to measure deformations using classical geodetic methods, but those are rarely used in practice because they are time-consuming and ...
    Sentinel-1 InSAR, слегање, рударствo, интерферометрија, даљинска детекција, Костолац