Претрага
1381 items
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A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)
Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenikaGordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević. "A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)" in Marine and Petroleum Geology, Elsevier BV (2021). https://doi.org/10.1016/j.marpetgeo.2021.105383 М21
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ОЦЕНКА ДОСТОВЕРНОСТИ ДАННЫХ ПО ЦИКЛИЧЕСКИМ УГЛЕВОДОРОДАМ - БИОМАРКЕРАМ, НАФТАЛИНАМ, ФЕНАНТРЕНАМ И АЛКИЛДИБЕНЗОТИОФЕНАМ, ПОЛУЧЕННЫХ ПРИ АНАЛИЗЕ МАСЕЛ МЕТОДОМ ХРОМАТОМАСС&СПЕКТРОМЕТРИИ.- НЕФТЕХИМИЯ Validation of data on polycyclic biomarkers, naphthalenes, phenanthrenes, and alkyldibenzothiophenes obtained by gas chromatographic-mass spectrometric analysis of hydrocarbon concentrates
Stojanović Ksenija, Kostić Aleksandar, Šajnović Aleksandra, Pevneva G.S., Golovko A.K., Jovančićević Branimir (2011)Stojanović Ksenija, Kostić Aleksandar, Šajnović Aleksandra, Pevneva G.S., Golovko A.K., Jovančićević Branimir. "ОЦЕНКА ДОСТОВЕРНОСТИ ДАННЫХ ПО ЦИКЛИЧЕСКИМ УГЛЕВОДОРОДАМ - БИОМАРКЕРАМ, НАФТАЛИНАМ, ФЕНАНТРЕНАМ И АЛКИЛДИБЕНЗОТИОФЕНАМ, ПОЛУЧЕННЫХ ПРИ АНАЛИЗЕ МАСЕЛ МЕТОДОМ ХРОМАТОМАСС&СПЕКТРОМЕТРИИ.- НЕФТЕХИМИЯ Validation of data on polycyclic biomarkers, naphthalenes, phenanthrenes, and alkyldibenzothiophenes obtained by gas chromatographic-mass spectrometric analysis of hydrocarbon concentrates" in Petroleum Chemistry (Neftekhimiya) Enginee no. 51, :Springer (2011): 243-251 M23
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Assessment of Landscape Sensitivity Based on Geochemical Characteristics of Sediments (Kremna Basin, Serbia)
Kašanin-Grubin Milica, Šajnović Aleksandra, Perunović Tamara, Stojanović Ksenija, Simić Vladimir, Gajica Gordana, Brčeski Ilija (2018)Kašanin-Grubin Milica, Šajnović Aleksandra, Perunović Tamara, Stojanović Ksenija, Simić Vladimir, Gajica Gordana, Brčeski Ilija. "Assessment of Landscape Sensitivity Based on Geochemical Characteristics of Sediments (Kremna Basin, Serbia)" in Natural Resources and Sustainable Development 2 no. 8, Oradea, Debrecen:University of Oradea, Faculty of Enviromental Protection Enviromental Engineering Department and University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management (2018): 148-165. https://doi.org/10.31924/nrsd.v8i2.016 M51
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Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils
Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteuriiOlja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov. "Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils" in Microorganisms, MDPI AG (2021). https://doi.org/10.3390/microorganisms9081691 М21
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Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash
летећи пепео угља, екстракција са једним агенсом, секвенцијална екстракција, микроталасне пећнице, ултраталасиAleksandra Tasić, Ivana Sredović-Ignjatović, Ljubiša Ignjatović, Marija Ilić, Mališa Antić. "Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash" in Journal of the Serbian Chemical Society (2016). https://doi.org/10.2298/JSC160307038T М23
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Antioxidant and antimicrobial activity of some tetradentate Schiff bases and their Cu (II) complexes
Aleksandar Mijatović, Milan Nikolić, Snežana Spasić, Aleksandra N. Žerađanin, Kristina Joksimović, Aleksandar Lolić, Rada Baošić (2020)Šifove baze i njihovi Cu(II) kompleksi su poznati po svojoj biološkoj aktivnosti. U ovom radu proučavana je antibakterijska aktivnost protiv gram-negativnih sojeva Escherichia coli, Pseudomonas aeruginosa i Staphilococcus piogenes, kao i Gram-pozitivnih Staphilococcus piogenes i Pseudomonas aeruginosa, zajedno sa antifungalnim dejstvom protiv Musperg strainilusa, A. Takođe, tehnički jednostavni i brzi testovi kao što su ABTS, HORAC i ORAC korišćeni su za ispitivanje antioksidativne aktivnosti kako bi se uporedili dobijeni rezultati sa različitim tipovima testova. Uprkos tome što je princip ...Aleksandar Mijatović, Milan Nikolić, Snežana Spasić, Aleksandra N. Žerađanin, Kristina Joksimović, Aleksandar Lolić, Rada Baošić. "Antioxidant and antimicrobial activity of some tetradentate Schiff bases and their Cu (II) complexes" in XIII Conference of Chemists, Technologists and Environmentalists of Republic of Srpska, University in Banjaluka, Faculty of Technology (2020) М34
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An alternative to Mahler Measure of polynomials
Dragan Stankov (2024)We introduce the ratio of the number of roots of a polynomial Pd, greater than one in modulus, to its degree d as an alternative to Mahler measure. We investigate some properties of the limit ratio. We generalise this definition for a two variable polynomial P(x,y) using the Cauchy’s argument principle. We present an algorithm for calculating the limit ratio and a numerical method for its approximation. We estimated the limit ratio for some families of polynomials. Some examples ...Dragan Stankov. "An alternative to Mahler Measure of polynomials" in The book of abstracts XV serbian mathematical congress, Belgrade, Serbia, june, 19–22, 2024, Univerzitet u Beogradu, Matematički fakultet (2024) М34
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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)Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević. "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" in Marine and Petroleum Geology, Elsevier BV (2020). https://doi.org/10.1016/j.marpetgeo.2020.104252 М21
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Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics
Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić. "Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics" in Minerals, MDPI AG (2024). https://doi.org/10.3390/min14050511 М22
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The alternative to Mahler measure of polynomials in several variables
Dragan Stankov (2024)We introduce the ratio of the number of roots of a polynomial Pd, greater than one in modulus, to its degree d as an alternative to Mahler measure. We investigate some properties of the alternative. We generalise this definition for a polynomial in several variables using Cauchy’s argument principle. If a polynomial in two variables do not vanish on the torus we prove the theorem for the alternative which is analogous to the Boyd-Lawton limit formula for Mahler measure. ...Dragan Stankov. "The alternative to Mahler measure of polynomials in several variables" in The book of abstracts XIV symposium "mathematics and applications” Belgrade, Serbia, December, 6–7, 2024 , Univerzitet u Beogradu, Matematički fakultet (2024) М64
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Approximation of the number of roots that do not lie on the unit circle of a self-reciprocal polynomial
Dragan Stankov (2024)We introduce the ratio of the number of roots not equal to 1 in modulus of a reciprocal polynomial Rd(x) to its degree d. For some sequences of reciprocal polynomials we show that the ratio has a limit L when d tends to infinity. Each of these sequences is defined using a two variable polynomial P(x,y) so that Rd(x) = P(x,xn). For P(x,y) we present the theorem for the limit ratio which is analogous to the Boyd-Lawton limit formula ...Dragan Stankov. "Approximation of the number of roots that do not lie on the unit circle of a self-reciprocal polynomial" in The book of abstracts XIV symposium "mathematics and applications” Belgrade, Serbia, December, 6–7, 2024 , Univerzitet u Beogradu, Matematički fakultet (2024) М64
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Геотехнички услови изградње хотела „Хилтон“ у Београду
Александра Комад Вучковић (2024)Завршни рад анализира геотехничке услове изградње хотела „Хилтон“ у Београду у урбаној средини где је ограничен простор и представља значајан изазов приликом пројектовања и изградње објеката са више подземних етажа.Истраживање је обухватило анализу постојеће документације и спровођење нових теренских и лабораторијских испитивања. Посебна пажња посвећена је карактеристикама тла и стена на локацији, укључујући њихову литологију, гранулометријски састав, физико-механичка својства и хидрогеолошке параметре. Анализа хидрогеолошких услова укључивала је тестирање пиезометра и оцену параметара као што су пропустљивост и ниво подземне ...Александра Комад Вучковић. Геотехнички услови изградње хотела „Хилтон“ у Београду, 2024
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Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process
Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blockerSanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković. "Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process" in Molecules, MDPI AG (2023). https://doi.org/10.3390/molecules28020655 М22
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Mineralogical Characterization of the Grot Lead and Zinc Mine Tailings from Aspects of Their Further Use as Raw Material
Jelena Gulicovski, Marija Stojmenović, Milena Rosić, Andrijana Vasić, Ivica Ristović, Ivona Janković-Častvan, Milan Kragović (2024)Ispitana je mogućnost korišćenja otpadne jalovine proizvedene flotacijom u rudniku olova i cinka Grot, Srbija kao potencijalnog izvora sekundarnih mineralnih sirovina. Cilj istraživanja je prvenstveno bio da se izvrši detaljna karakterizacija kako bi se utvrdili dominantni minerali, i po prvi put da se prate promene koje se dešavaju u jediničnim ćelijama minerala prisutnih u tom ležištu. Pojavila se i potreba utvrđivanja tačnih razmera postojećih mineralnih faza za njihovu dalju primenu i korišćenje kao prirodnih resursa u zaštiti životne sredine. ...jalovina, ekstrakcija minerala, mineralogija, geohemijske osobine, granulometrija, valorizacija nusproizvodaJelena Gulicovski, Marija Stojmenović, Milena Rosić, Andrijana Vasić, Ivica Ristović, Ivona Janković-Častvan, Milan Kragović. "Mineralogical Characterization of the Grot Lead and Zinc Mine Tailings from Aspects of Their Further Use as Raw Material" in Applied Sciences, MDPI AG (2024). https://doi.org/10.3390/app14031167 М22
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The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments
Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević. "The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments" in Journal of Serbian Chemical Society, Beograd : Srpsko hemijsko društvo (2013). https://doi.org/10.2298/JSC130614087S M23
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Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)
Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović. "Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)" in 30th International Meeting on Organic Geochemistry (IMOG 2021), European Association of Geoscientists & Engineers (2021). https://doi.org/10.3997/2214-4609.202134040 М33
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Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash
The aim of this paper is to simulate leaching of metals from fly ash in different environmental conditions using ultrasound and microwave-assisted extraction techniques. Single-agent extraction and sequential extraction pro¬cedures were used to determine the levels of different metals leaching. The concentration of metals (Al, Fe, Mn, Cd, Co, Cr, Ni, Pb, Cu, As and Be) in fly ash extracts were measured by inductively coupled plasma-atomic emission spectrometry. Single-agent extractions of metals were conducted at sonication times of 10, ...leteći pepeo uglja, ekstrakcija sa jednim agensom, sekvencijalna ekstrakcija, mikrotalasi, ultratalasiAleksandra Tasić, Ivana Sredović-Ignjatović, Ljubiša Ignjatović, Marija Ilić, Mališa Antić. "Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash" in Journal of the Serbian Chemical Society, National Library of Serbia (2016). https://doi.org/10.2298/JSC160307038T М23
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Дигитална библиотека паралелизованих чланака двојезичних часописа
Крстев Цветана, Станковић Ранка, Лазић Биљана. "Дигитална библиотека паралелизованих чланака двојезичних часописа" in Међународна научна конференција Дигиталне библиотеке и дигитални архиви, 7. и 8. април 2014 године, Београд, Нови Сад, Београд:Филолошки факултет (2014): 19-20 M64
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Lithosphere geodynamics inferred from study of mantle xenoliths
Vladica Cvetković (2023)Vladica Cvetković. "Lithosphere geodynamics inferred from study of mantle xenoliths" in International Conference on Recent Trends in Geoscience Research and Applications 2023, Belgrade, Serbia & Virtual, October 23–27, 2023, Beograd (2023) М34
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Sitni, ali bitni: uloga sitnih sisara, herpetofaune i mekušaca u rekonstrukciji pleistocenskih paleosredina
Fosilni ostaci životinja i biljaka imaju važnu ulogu u rekonstrukciji pleistocenskih paleosredina. U ovom radu opisan je značaj tri grupe životinja: sitnih sisara, herpetofaune I mekušaca. Mada je za rekonstrukciju važan sastav čitave asocijacije, nalasci pojedinih vrsta mogu biti dovoljno indikativni da otkriju tip staništa ili klimatske uslove. Posebnu teškoću pri rekonstrukciji paleosredina u Srbiji predstavlja činjenica da klimatske promene na Balkanskom poluostrvu nisu bile tako oštre kao u srednjoj i zapadnoj Evropi, pa ne postoji drastična razlika u ...Katarina Bogićević, Draženko Nenadić, Dragana Đurić, Mihajlo Jovanović, Aleksandra Savković. "Sitni, ali bitni: uloga sitnih sisara, herpetofaune i mekušaca u rekonstrukciji pleistocenskih paleosredina" in Zbornik sažetaka III Kongresa geologa Bosne i Hercegovine, Neum, 21.-23.09.2023., Ilidža : Udruženje geologa Bosne i Hercegovine (2023) М33