Претрага
4505 items
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Clayed wastewater treatment
Анионски (A120), нејонски (N100), катјонски (C460; C581) флокуланти и коагулант Al₂(SO₄)₃ коришћени су за пречишћавање отпадних вода са садржајем глине. pH дисперзије је износио 7,8, са концентрацијом чврстих материја од 25,93 kg/m³ (глина и кварц). 54% чврстих честица имало је пречник мањи од 10 μm. Брзина таложења без примене флокуланата износила је 0,4 m/h. Ефикасност коришћених флокуланата је следећа: A120 >> N100 >> C460. У присуству A120 (100 g/t) брзина таложења достигла је око 25 m/h, а добијен ...Dušica Vučinić, Đurica Nikšić, Predrag Lazić. "Clayed wastewater treatment" in Mining and environmental protection, Vrdnik, 25 - 28. September 2019, University of Belgrade, Faculty of Mining and geology (2019) М33
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Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia
У циљу оцене стања животне средине и разумевања потенцијалних узрока још раније евидентираног лошег хемијског статуса водног тела подземних вода „Крш–север“, извршенa je хидрогеолошка проспекција шире околине лежишта бакра Мајданпек, која је укључилаистраживање површинског копа, флотационог језера и главних карстних врела и пећина. Имајући у виду да се експлоатационо поље рудника бакра Мајданпек директно граничи са карстном издани и водним телом подземних вода „Крш–север“, параметри квалитета подземне воде су анализирани (in situ и лабораторијски) на два главна карстна врела ...Zoran Stevanović, Veljko Marinović, Branislav Petrović. "Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia" in Geoloski anali Balkanskoga poluostrva (Annales geologiques de la Peninsule balkanique), University of Belgrade, Faculty of Mining and Geology (2020). https://doi.org/10.2298/GABP201107010S М24
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Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin
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.Angelina Petrović, Aleksandar Mijatović, Rada Baošić, Jovana Bogojeski. "Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin" in 6. Konferencija mladih hemičara Srbije, Srpsko hemijsko društvo (2018) М64
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Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?
Ana Mladenović, Jelena Ćalić (2021)Methods to determine seismic hazard in any region vary depending on the regional seismicity, but can be roughly grouped into two main groups: one based on probabilistic methods that use data about known seismicity in the region, and another, which is based on data related to the faulting processes and determination of seismically active faults. Both groups of methods are relatively good for seismically active regions. However, in regions of low seismic activity and slow deformations, there is neither ...Ana Mladenović, Jelena Ćalić. "Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?" in EGU General Assembly 2021, European Geosciences Union (2021). https://doi.org/10.5194/egusphere-egu21-8723 М34
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Investigation of accessory elements of representative petrologic radioactivity carriers at Stara Planina, Serbia
Boris Vakanjac, Ivana Jelic, Milena Rikalovic, Vesna Ristic-Vakanjac, Dusan Nikezic, Zorana Naunovic, Slavko Dimovic (2019)Ова студија се бави обиљем најчешћих акцесорних елемената носилаца радиоактивности на Старој планини на четири дефинисане локације. Све истраживане локације имају повећану радиоактивност, већу од 200 цпс, до 1250 цпс. У свим испитиваним узорцима детектовани су следећи елементи и одређене њихове концентрације: Зр, Рб, В, Мо, Сн, Зн, Цу, Ас, Сб, Ба, Ни, Цр, В и Ти. Анализа је показала да су у зависности од узорка утврђене повишене концентрације свих детектованих елемената осим титана. Како се сви локалитети који ...Boris Vakanjac, Ivana Jelic, Milena Rikalovic, Vesna Ristic-Vakanjac, Dusan Nikezic, Zorana Naunovic, Slavko Dimovic. "Investigation of accessory elements of representative petrologic radioactivity carriers at Stara Planina, Serbia" in Nuclear Technology and Radiation Protection (2019). https://doi.org/10.2298/NTRP190709039V М23
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The Inner Aggregation Newton’s Method for Solving Nonlinear Equations
Nebojša M. Ralević, Dejan Ćebić, Bratislav Iričanin. "The Inner Aggregation Newton’s Method for Solving Nonlinear Equations" in Scientific Publications of the State University of Novi Pazar, Ser. A: Appl. Math. Inform. and Mech (2022) М52
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Geodynamic history unveiled from rock archives: The case of central Balkan Peninsula
Vladica Cvetković (2023)Vladica Cvetković. "Geodynamic history unveiled from rock archives: The case of central Balkan Peninsula" in International Conference Natural Resources and Environmental Risks: Towards a Sustainable Future, Novi Sad, October 13–15, 2023, Beograd (2023) М34
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The new Serbian Energy Sector Development Strategy until 2025 and projections until 2030
Ramić Biljana, Ivezić Dejan (2016)Ramić Biljana, Ivezić Dejan. "The new Serbian Energy Sector Development Strategy until 2025 and projections until 2030" in Energy Scenarios for SE Europe: A close look into the Western Balkans, Luxembourg:Publications Office of the European Union (2016): 24-26. https://doi.org/10.2790/337882 M32
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Influence of rock mass blastability on explosive energy distribution
Mitrović Stojan, Kričak Lazar, Negovanović Milanka, Janković Ivan, Zeković Dario. "Influence of rock mass blastability on explosive energy distribution" in Proceedings of the 9th International Symposium on Rock Fragmentation by Blasting, :Taylor & Francis/CRC Press (2009): 249-255 M33
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Environmental and Safety Accidents Related to Blasting Operation
Kričak Lazar, Kecojević Vladislav, Negovanović Milanka, Janković Ivan, Zeković Dario. "Environmental and Safety Accidents Related to Blasting Operation" in American Journal of Environmental Science 8 no. 4, New York, USA:Science Publication (2012): 360-365. https://doi.org/10.3844/ajessp.2012.360.365 M24
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Modflow na raskrscu
Polomčić Dušan, Bajić Dragoljub, Ristić-Vakanjac Vesna, Čokorilo Ilić Marina. "Modflow na raskrscu" in Zapisnici Srpskog geološkog društva, Beograd, Srbija:Srpsko geološko društvo (2014): 173-186 M53
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Experimental investigation on emission and stability of dual feed biogas swirl combustor
Živković Marija, Milivojević Aleksandar, Adžić Miroljub. "Experimental investigation on emission and stability of dual feed biogas swirl combustor" in Journal of Renewable and Sustainable Energy 2 no. 6, Melville, NY 11747-4300, USA:AIP Publishing (2016): 55-66. https://doi.org/http://doi.org/10.1063/1.49455 M23
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Хидрогеолошки услови формирања угљокиселих минералних вода Србије
Goran H. Marinković (2014-06-17)Докторском дисертацијом разматране су хидрогеолошке структуре угљокиселихминералних вода литосфере Србије. При истраживањима узети су у обзир:резултати испитивања старости, порекла и физичко – хемијских карактеристикаугљокиселих вода, геотемпературни услови и геотектонска грађа литосфере,резултати изотопских испитивања на δ13С у карбонатима хидротермалнихлежишта, резултати истраживања минималних температура трансформацијекарбоната и структурно - хидрогеолошки услови у областима дренирањаугљокиселих вода.Резултати показују да је угљеник угљокиселих вода пореклом из карбонатахидротермалне фазе младих магматских процеса, а да су матични супстратиовог елемента карбонати мезозојских и палеозојских седиментних иметаморфних стена. Угљендиоксид ...литосфера Србије, угљокиселе воде, генеза, супстрати, рејони,хидрогеолошке структуре, дубина залегања, геолошки услови, типови,потенцијал.Goran H. Marinković. "Хидрогеолошки услови формирања угљокиселих минералних вода Србије" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-06-17)
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Sedimentologija gornje krede centralnog dela vardarske zone
Violeta M. Gajić (2014-09-04)Područje istraţivanja obuhvaćeno doktorskom disertacijom nalazi se ucentralnim delovima Vardarske zone. Karakteriše se sloţenom geološkomgrađom koju grade mezozojske tvorevine trijaske, jurske i kredne starosti, kao ikvartarni sedimenti. U trijasu je istraţivano područje pokrivalo more, sve dogranice sa Šumadijom. Tokom jure sloţenim geotektonskim procesima stvarajuse ofiolitske stene rasprostranjene u juţnim i delom u centralnim delovimaistraţivanog područja. U donjoj kredi se pokretima dinarske faze izdiglo kopno,koje je egzistiralo skoro u celoj donjoj kredi područja istraţivanja.U alb-cenomanu pojedini delovi istraţivanog područja se ...Violeta M. Gajić. Sedimentologija gornje krede centralnog dela vardarske zone, Универзитет у Београду, Рударско-геолошки факултет, 2014-09-04
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Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
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 ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017 M24
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Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia
Dragoljub Bajić, Dušan Polomčić (2014)A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variablesDragoljub Bajić, Dušan Polomčić. "Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia" in Geološki anali Balkanskoga poluostrva, Belgrade : University of Belgrade - Faculty of mining and geology (2014). https://doi.org/10.2298/GABP1475103B M24
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Combining Heterogeneous Lexical Resources
Cvetana Krstev, Duško Vitas, Ranka Stanković, Ivan Obradović, Gordana Pavlović-Lažetić. "Combining Heterogeneous Lexical Resources" in Proceedings of the Fourth Interantional Conference on Language Resources and Evaluation, Lisabon, Portugal , May 2004, vol. 4, ELRA - European Language Resources Association (2004) М33
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Testing the energy value of different types of coal by the method of active thermography
In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020) М33
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Productivity improvement with use of beam gas compressor: pilot test in Southeastern Europe mature field
Most of the wells in the oilfield Turija are operating with sucker rod pumps, where casing pressure at around 15 bar, and with marginal production rates. The high value of casing pressure indicates high pressure on the face of the formation and depends directly on well productivity. In addition, with increasing value of the casing pressure gas column in the annulus is moving the dynamic fluid level near pump intake and more gas is entering the pump, it results ...beam gas compressor, BGC, increase productivity, sucker rod pump, SRP, mature field, artificial lift, production optimisationBojan Martinović, Dušan Danilović, Branko Grubač, Robert Fadiga. "Productivity improvement with use of beam gas compressor: pilot test in Southeastern Europe mature field" in International Journal of Oil Gas and Coal Technology (2022) М23
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New Pliensbachian rhynchonellide (Brachiopoda) from Livari, (Rumija Mountain, Montenegro): taxonomy and shell microstructure implications
Barbara V. Radulović (2022)An interesting case of close external similarity (homoeomorphy) is revealed by the study of an Early Jurassic rhynchonellide brachiopod from Livari, Rumija Mountain, southern Montenegro. Shell microstructure was used as the primary diagnostic tool, applied before serial sectioning to study internal characters. Sepkoskirhynchia sphaerica gen. et sp. nov. is erected based on the presence of coarse fibrous shell microstructure and subfalciform crura. Because of these primary diagnostic characters, the new genus is placed in the rhynchonellide family Basiliolidae. The ...Brachiopods, Jurassic, Sepkoskirhynchia, Soaresirhynchia, shell microstructure, Dinaric Carbonate PlatformBarbara V. Radulović. "New Pliensbachian rhynchonellide (Brachiopoda) from Livari, (Rumija Mountain, Montenegro): taxonomy and shell microstructure implications" in Historical Biology (2022) М21