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1492 items

  • Definisanje geotehničkih karakteristika terena za potrebe izgradnje stanice za snabdevanje gorivom “OMV” u Trsteniku

    Milica Dutina (2024)
    U ovom Završnom radu prikazana su istraživanja na osnovu kojih su urađeni grafički dio, proračun nosivosti i proračun analize slijeganja terena za potrebe izgradnje benzinske stanice sa pratećim objektima. Detaljno je analiziran prodajni objekat,čelični rezervoar za gorivo i znak. Za proračun graničnog opterećenja korišćena je metoda Mayerhofa, dok je analiza slijeganja urađena Konsolidacionom metodom slijeganja za prodajni objekat i čelični rezervoar za gorivo, a za temelj znaka po principu slijeganja i rotacije krutih temelja - Gorbun Posadov. Sve dobijene ...
    terenska istraživanja, laboratorijska ispitivanja, geotehnička istraživanja, geotehnički model terena, osnovne tehničke karakteristike, analiza slijeganja, proračn nosivosti
    ... proračun graničnog opterećenja tla a) Metoda Mayerhof-a Čelični rezervoar za gorivo - proračun graničnog opterećenja tla a) Metoda Mayerhof-a 10. Znak - proračun graničnog opterećenja tla a) Metoda Mayerhof-a 11. Proračun veličine slijeganja — a) Prodajni objekat b) Čelični rezervoar ...
    ... id=419) Izmjereni nivo vode se nalazi na većoj dubini u odnosu na dubinu iskopa. kota regulacije Terena n-1 or-d c a kotaterena „|167.6 4 40 L 4 a 4 .. dt dk a A a a A dK JA J {p,pr NPV Slika 8 — Prikaz modela terena sa čeličnim rezervoarom 5.1.2. Prodajni objekat Prodajni objekat ...
    ... aaaaaaaa da anataaaatek 10 3.3. _ Laboratorijska ispitivanja............ a aaaae a a aaaa a aeaaaaaaitet 10 4. REZULTATI ISTRAŽIVANJA ...G aaeeeeeekekkkakkkkka 13 4.1. Opšta saznanja o istraŽžnom prostoru ........aaaaaa a aa a aaaaaeaaaaaaaeaaaaNaaakev 13 4.1.l. . Geološki položaj i morfološke ...

  • Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world

    Bogoljub Vučković, Bojan Dimitrijević (2023)
    The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...
    lignite, heavy metals, concentrations
    ... burning the same samples. A total of 155 samples were taken from coal and 45 from 179 ash. A total of 22 chemical elements were analyzed. Here is an overview of three. It can be concluded that there is a certain lateral zonation of the distribution of Zn, Cu and Pb (ppm) in such a way that in the area ...
    ... Europe and World are mainly a consequence of the geological composition and geochemical background of that region, as well as anthropogenic/industrial influence. REFERENCES: 1. Aguilera A., Bautista F., Gutierez-Ruiz M., Ceniceros-Gomcz A., Cejudo R., Goguitchvill A., 2021 – Heavy metal pollution ...
    ... secams was registered, which continuously extend under the Danubce (Fig. 3 a, b, c). In the part of the unique deposit, on OP Drmno and OP Cirikovac, there is also a 5" coal layer (Fig. 3d) which is of small thickness, is at a great depth and is not balanced. These 4 coal layers (I, la, II and III): ...

  • Legal framework for recultivation of degraded areas caused by mining exploitation

    Radmila Gaćina (2023)
    Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...
    rekultivacija, melioracija, otkopavanje uglja, zakonska regulativa
    ... by a specific activity. The term devastated area is also usually used, which denotes a lifeless area after use, without a fertile soil layer suitable for future cultivation. Damaged land is brought to a new purpose through technical and biological reclamation, where land reclamation is a set of ...
    ... at all, 2023). Land recultivation seeks to make the land more productive and create a far better situation for environment after coal mining. Moreover, a good recultivation policy is a great way to introduce a restorative approach to the environment plus the sustainable management of reclaimed ...
    ... regulation 1 INTRODUCTION Recultivation can produce more value for the environment and create a better situation for post-mining land. Recultivation obligation policy is a great way to introduce a restorative approach to the environment, but main problem is the inconsistency of the mining companies ...

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • 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
    ... with Cu Kα 1,2 radiation source (a generator voltage of 40.0 kV and a generator current of 40.0 mA). All samples were recorded in the range of 10–90◦ 2θ, with a scanning step of 0.02◦ and at a scan rate of 2◦/min. Raman spectra of activated carbons were collected on a DXR Raman microscope (Thermo Scientific ...
    ... Olympus optical microscope and a CCD detector, with a diode pumped solid state high-brightness laser (532 nm) and a 10× objective. The powdered sample was placed on X–Y motorized sample stage. The analysis of the scattered light was carried out by the spectrograph with a grating 900 lines/mm. The laser ...
    ... is particularly significant in inorganic or organic pollutants removal, due to a large number of unique characteristics, such as a highly developed porous structure, large surface area, variability in surface chemistry, and a high level of surface activity [33–35]. The major drawback of the conventional ...

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... 11. Organization of graphs in cascades enables complex text transformation. Each graph in a cascade is a transducer that transforms a text. A graph that follows works on this transformed input. A full Named Entity Recognition System for Serbian is presented as an illustration. Didactic ...
    ... expression input. Picture 2 represents a simple example of question where the answer requires a click on the part of a picture. After submission, the student is able to see the explanation. Image 2: Question - image mapped input Specific formats It was a big challenge to embed different formats ...
    ... target group, we provided a description of the course, a list of required programs that will be used and the literature related to the topics included in the course. Whenever possible, hyperlinks to the materials are provided. If the material does not exist in e-format, a link to the list of libraries ...

  • New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)

    Nevenka Đerić, Nataša Gerzina (2014)
    Gornja kreda, radiolarije, Jadar blok, zapadni pojas Vardarske zone, zapadna Srbija
    ... in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs New data on the age ofan Upper [a(f:\č;{a{el_}:yx:bi{ew{ec|geloln}:(-}{M{aa{=}-{{0}}| in Brežđe (Western Serbia) ~ Nevenka Đerić and Nataša Gerzina y of Mining and Geology, Univ y e ...
    ... studied in a carbonate-clastic section from the Cretaceous sedi- mentary cover that unconformably overlies Triassic sediments of the Jadar Block. According to the identified radi- olarian associations, the studied limestone is of Santonian age. Considering the fact that these sediments belong to a broadly ...
    ... Turonian sediments, but are together marked as a single unit of Turonian-Senonian age. During the last few years, however, radiolarian investigations have becn focused on the Struganik locality in the vicinity of Brežđe village. These investigations enabled a more detailed biostratigraphic assignment ...

  • Hydrographic and hydrological characterization of the Vodenička and Rosomačka rivers

    Vesna Ristić Vakanjac, Marina Čokorilo Ilić, Dušan Polomčić, Dragoljub Bajić, Jelena Ratković (2017)
    The Visočica River rises in Bulgaria, on the Berovo Mountain. Its course in Bulgaria is 16.7 km long. It enters Serbia near the village of Donji Krivodol. Up to the village of Pakleštica, or the beginning of Lake Zavoj, its right-bank tributaries are the Krivodolštica, the Vodenička, the Rosomačka and the Dojkinačka. There are no left-bank tributaries. Among the tributaries, water levels and discharges are gauged only on the Dojkinačka River. The Vodenička had also been gauged but only ...
    hydrographic characteristics, river discharge, the Vodenička River, the Kamenička River
    ... Воденичке... Пиротски зборник 42 (2017) 1-24 11 0 2 4 6 8 10 12 14 16 18 1 2 3 4 5 6 7 8 9 10 11 12 M e a n a n n u a l d is c h a rg e Q ( m 3 /s ) The Visocica at Izatovac The Visocica at V. Ržana The Visocica at Braćevci The Visocica at Pakleštica The ...
    ... 63 19 65 19 67 19 69 19 71 19 73 19 75 19 77 19 79 19 81 19 83 19 85 19 87 19 89 19 91 19 93 19 95 19 97 19 99 M e a n a n n u a l d is c h a rg e Q ( m 3 /s ) Vodenicka River Rosomacka River Figure 7 Calculated mean annual discharges of the Vodenička and Rosomačka ...
    ... Срачунате средње годишње вредности протицаја Воденичке и Росомачке реке 0 0.5 1 1.5 2 2.5 1 2 3 4 5 6 7 8 9 10 11 12 M e a n a n n u a l d is c h a rg e s Q ( m 3 /s ) Vodenicka River Rosomacka River Figure 8 Monthly distributions of calculated discharges of the Rosomačka ...

  • Evidence for Ladinian (Middle Triassic) platform progradation in the Gyulakeszi area, Tapolca Basin, Western Hungary: Microfacies Analysis and Biostratigraphy

    Zsolt Robert Nagy, Nevenka Đerić, Sándor Kovács, Anna Oravecz-Scheffer, Felicitász Velledits, Olga Piros, Gabor Csillag (2014)
    anizik, ladin, karbonati, litostratigrafija, biostratigrafija, konodonti, radiolarije, dijageneza
    ... *đ""'”“"'žw.gc(wn_'o*)" i.„ + 00000 Š y o —— • ORRARIRERIRASI OI PRROOAERI TORAAAG BBR 1) s|? -|Š|Š FEEE alš|a o -- i s|5 a —— .. | a 0 —— ——— š|š š|a ••o o FI a Š aa Š BS8. s ašš — j, š NER not exposed TW inraclasts HO i Pal:Ki ŠŠ —— nodular cherty ON Snoustations s % ŠšŠŠ limestone ...
    ... Fzs-4 _ — = Go nd ol el la pr ae hu ng ar ic a • Go nd ol el la co ns tr ic ta po st co rn ut a O Go nd ol el la co ns tr ic ta ba lk an ic a ć Go nd ol el la al pi na sz ab ći G on do le ll a al pi na al pi na Fzs-3 JA vi si an um | O – — ...
    ... • Gl ad ig on do le ll a te th yd is Fzs-1 in tbe Tapolca Basin, westeym Hungary As tr oc en tr us pu lc he r 169 s a s |-4 .. i -i F š 3 3 xS50% Š š E Rasoč Š a -- NB - 839%55SSŠ S 3 š F s 88895ZS Š Š 9 3 38 Š„S88998S5S 2a — —— -— x"Q8—S5S_ a ŠB B E Š Š 8 —0 k s F1 Ss ...

  • Uticaj raspadanja na stabilnost kosina u mekoj stenskoj masi

    Anđela Despotov (2024)
    U radu je opisano ponašanje mekih stenskih masa koje su izložene porecesu raspadanja tokom određenog vremenskog perioda. Meke stenske predstavljaju kritične vrste stenskih masa pošto izazivaju različite probleme tokom izvođenja građevinskih radova. Meke stene mogu biti sedimentne stene, raspadnute metamorfne i magmatske stene. Odlikuju se niskim vrednostima čvrstoće, visokom deformabilnošću, visokom plastičnošću, podložne su dezintegraciji i fizičko-hemijskom raspadanju, odnosno ubrzanom dejstvu površinskog raspadanja usled atmosferskih uticaja.Za klasifikaciju mekih stenskih masa koriste se modifikovane verzije već postojećih klasifikacionih sistema. Jedan ...
    meke stenske mase, dezintegracija, klasifikacioni sistemi, Slake durability test
    ... e, ve om a iz me nj ne po vr ši ne hr ap av e, bla go iz me nj en e po vr ši ne , sa me ko m gl in cv it om is pu no m K V A L I T E T Z I D O V A P U K O T I N A (U gl av no m sl oj ev it os ti ) 'V RL O DO BA R sa gv ož đe vi ti m fl ek am a |U ME RE ...
    ... mekim stenskim masama........aaaaa a naaaaaaaeaaaaaaaaaeNott 1 2.1 Klasifikacioni sistemi ........aaaa a aaaaaeaaaaeeaaateeaaaagataovovı 5 2.2 Mehaničke karakteristike.........aa da aeaaanaaaaaaaaNovt 9 3. Koncept raspadanja stenskih masa..............c.aaaaaa a aaaaaaaaaaaaaataee 10 4. Uticaj ...
    ... aaaaannnnn.. 30 6. Zaključak ..........aaaaaaana a aaiaeaeapaaaeaateaegaeNavattaee 32 6. Literatura „l aaaaaaaaaa ag aaaaagaa a aaaaaaaaaatatioi 35 Popis slika, grafika i tabela Popis slika Slika 1. Osnovni GSI dijagram (Hoek i Brown, 1997) a aaaaaaanadanan, 7 Slika 2. GSI dijagram za flišne ...

  • Избор методе подземног откопавања на примеру лежишта бакра

    Mилош Глигорић (2024)
    Тема овог завршног рада је избор методе откопавања у подземном руднику бакра. Рад је подељен на четири поглавља. У првом поглављу дат је приказ општих података и геолошких карактеристика ширег подручја и лежишта. Детаљан опис отварања и припреме лежишта за откопавање представљен је у другом поглављу. У трећем поглављу дат је опис све три варијанте изабране методе за запуњавањем откопаног простора, са освртом на количину захваћене руде, трошковима експлоатације као и динамиком откопавања. Четврто поглавље представља нумерички пример где ...
    избор методе подземног откопавања, анализа ефективности, лежиште бакра, подземна експлоатација
    ... 3 VTOBAP H TPAHCIIOPT a a a aaanaaaae a aaaaaaaaaeaaaoaaaaaaaataattH 17 2.4 TIOJU PAĐMHBAĐME......aanaanaaa da ae da aiaatadata da da aaataaattı 17 2.5 BEHTIHJIALIHJA y TOKY H3PAJIE IIPOCTOPHJA IHPHIPEME...aaaınaaaa a eaaaaaaaaaanek 18 2.6 OJIBOJIĐABAMĐE Y TOKY H3PAJIE IIPOCTOPHJA IIPMIIPEME . ...
    ... OmkOHnHO2 XOOHUMKG a nininaeikaaaiNket 41 3.3.5 /luRaMuka omkonagatba III ekcnnoamauyuoHoe noOJdCd al nnı 42 4. AHAJIH3A EDEKTHBHOCTH H3BOPA METOJIE OTKOIIABAMbA . 4.1 KPATAK OTLIHC AJITEPHATHBA H KPHTEPHJYMA .. 4.2 MPSI METOJIA ...aaaaaaaaaana da aata a aaeaea a da aaad da eae da a da daaataadataı ...
    ... MARA METOJIA lttt aaaaaeaatae a e a eatadaeaaaeaeada da d a e ataadattaı 46 LA UBsNAVIpu7u- 140004 0I IL AANVANNAVANNANAANAVANAANANAAANAANAAANAAAAANAANAAAAAANNAAAANNAAANNAAAANAAAANAAAANAAAAAAAANAAANAAAAAAAAAAAAANNAN 50 4.4.1 Ynopeona ananu3a npuMe?beHuXx MeMOOd altya a anacnaneataeaaaaiNket 54 RNJEJ ...

  • Хидрогеолошке карактеристике изворишта за водоснабдевање Kањиже

    Vladimir Jović ( 2024)
    Rad se bavi hidrogeoloskim karakteristikama izvorista za vodosnabdevanje opstine Kanjiza. Istrazivanja su sprovedena na tri hidrogeoloska kompleksa, od kojih su drugi i treći kompleks kljućni za vodosnabdevanje. Ovi kompleksi se nalaze u sedimentima pleistoćenske i paludinske starosti, na dubinama od 60 do 260 metara, sa subarteskim nivoom vode. Ukupne rezerve podzemnih voda u okviru drugog i treć eg hidrogeoloskog kompleksa iznose 935 l/s, a klasifikovane su u dve kategorije: B i C1. Kvalitet podzemnih voda je stabilan i pripada ...
    hidrogeologija, podzemne vode, vodosnabdevanje, hidrogeološki kompleksi, Kanjiža
    ... zona zaštite- ZONA II .........a a a aaaaaaaaaaaaaaoaaaaaaaaaaaaaaaaaaatteot 46 8.3. Šira zona zaštite- ZONA III...............aaaaaaa a eanaeaeakakaeattaatakkate 48 9. ZAKLJUČAK..aa a aaa a aaaa a aaaeaaaaaaa a aa ii aaaaaaaaaaieaaaatattat 49 10 LITERATURA:.....a a aaaaaaaaaaaaaaaaaaaaeaoaaaaaa ...
    ... Selo 5.7. Izvorište naselja Doline ...............c..aa a aaaaaaaaaaaaaaoaaaoaaaaaaaaeaaaateeet 31 5.8. Izvorište naselja Orom...........a a aaaea a aaaaaaaaaaaaoaaaoaaaaaaaaaeoaaatteeı 31 5.9. Izvorište naselja Velebit................... a a aaaaaaaaaoaaaoaaaaoaaaaaaaateeet 31 5.10. Izvorište naselja ...
    ... Modifikovano: Danilo Rakić Datum: Septembar 2024. Prolog 1.6. 8 e - O K I A i s [ k-] “ l [ % w_ e . UOKRIKKIOON B KO E = r J A VW r KaHan - E -d a a 2 2 12 22 2 Z a m i a I I ) donop uikona k k k t-] – - — — _ Z u = _ u = ...

  • Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)

    Ana Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković (2019)
    In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...
    Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinica

  • Model of the Geomagnetic reference field of the Republic of Serbia

    Spomenko J. Mihajlović, Vesna Cvetkov (2024)

  • The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia

    Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić (2019)
    For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...
    landfill, geotechnical investigations, transfer station
    ... treatment is being improved, a certain number of workers of lower social status are employed and a positive economic effect is achieved. From a citizen's perspective, the introduction of a quality organization into the waste management system, with the exception of a stimulating effect (feeling ...
    ... investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the production of a new technological project. For these reasons, the importance of geotechnical investigations ...
    ... terrain often exceed the costs of establishing a recycling yard, i.e. transfer station, • increasing investment and exploitation costs for equipment and labor. 3. PRESENTATION OF TRANSFER STATION „PRELICI“ WITH SELECTION AND RECYCLING CENTER As a part of the transfer station “Prelici”, the following ...

  • Poboljšanje geotehničkih uslova izgradnje nasipa upotrebom geosintetika

    Anastasija Radovanović (2024)
    Za potrebe izrade rada na Master akademskim studijama ,,Rudarsko-geološkog fakulteta,,, studijskog programa Geotehnika, pod mentorstvom prof. dr Gordane Hadži-Niković , izvršena je detaljna analiza stabilnosti kosina nasipa na Vranjskoj petlji. Geotehnička istraţivanja i ispitivanja terena izveo je “Zavod za geotehniku iz Instituta za puteve a.d. Beograd”, a investitor je “Javno preduzeće, Putevi Srbije”.Metodološki pristup koji je korišćen za analizu stabilnosti kosina nasipa jeste kabinetsko istraživanje dostavljene dokumentacije i geostatički proračuni analize stabilnosti kosina nasipa, korišćenjem savremenih softverskih alata.Krajnji zaključak izvedenih istraţivanja je da ...
    tlo, nasip, analiza stabilnosti, faktor sigurnosti, geosintetici
    ... Prilozi: 51 Inženjerskogeološka karta Anastasija 1.1 1:2000 29.05.2023. Radovanović TE OJ IO UH IK A C T A P O C T PE LI EH TH A K B A P T A P J K B A P T A P T E H E T C K A PT IP VI IT AJ IH OC T bj r || bj = |} > = o e C _ r = L = m > = < ...
    ... ebe 5 2.1. Geotekstili....aaaaaaaaa a dtaaaaaaaaaaaabatet 5 2.2. GeOomreŽe...aaaaaaa a aaaaaaaaaaaa a aeaaaaaaaaaa a aaaaaaaabaoea 7 3. SVOJSTVA GEOSINTETIKA aaqnına a aaeaaaaaaaaeaaaaaaeaeaaaaaaaaaaaeaaaeeežee 9 3.1. Fizička svojstva........aaaaaaaaaa a eaaataaatataataaateoati 9 3.1.1. Dužina ...
    ... Dužina i širina........aaaaaaa ddv av a a aaadatttt 9 3.1.2. Površinska masa.......aaaaaaaaa a naaneoaaaaataaaaaaaka e 9 3.1.3. Debljina.......caaaaaaaaa a eaaaaaataaaaakatoa e 9 3.2. Mehanička svojstva........aaaaaaanaaaa da neaanaaatataataakataoati 9 3.2.1. Čvrstoća na zatezanje i izduŽenje ...

  • Ionothermal synthesis and crystal structure of a new organic–inorganic hybrid compound:catena-poly[bis(1-ethyl-3-methylimidazolium) [hepta-μ-bromido-pentacuprate(I)]]

    Ljiljana Karanović, Dejan Poleti, Tamara Đorđević (2014)
    A new organic-inorganic hybrid compound, catena-poly[bis(1-ethyl-3-methylimidazolium) [μ5-bromido-tri-μ3-bromido-tri-μ2-bromido-pentacuprate(I)]], {(C6H11N2)2[Cu5Br7]}n, has been obtained under ionothermal conditions from a reaction mixture containing Ba(OH)2•8H O, Cu(OH)2•2H2O, As2O5 , 1-ethyl-3-methylimidazolium bromide and distilled water. The crystal structure consists of complex [Cu5Br7]2- anions arranged in sinusoidal {[Cu5Br7]2-}n chains running along the a axis, which are surrounded by 1-ethyl-3-methylimidazolium cations. Three of the five unique Br atoms and one of the three Cu(I) atoms occupy special positions with half-occupancy (a mirror plane perpendicular to the b ...
    кристална структура, органско-неорганско хибридно једињење, бакар(I) бромид, јонотермна синтеза, 1-етил-3-метилимидазолијум бромид, Cu•••Cu интеракције

  • Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules

    Svetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón (2024)
    The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...
    Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analiza

  • Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia

    Maja Milošević, Mihovil Logar, Biljana Đorđević (2021)
    ... minerals. A total of three vessels were analysed, broken down by type of workmanship: coiling technique (traditional handmade clay pot made by coiling on a hand-turned wheel) marked -1-; wheel throwing (on a wheel with an electric drive) marked as -4- and by moulding (application of a mould) marked ...
    ... traditionally (wood-fired oven), stands out. A microscopic examination of the thin sections revealed a uniform mineral composition and porosity. For sample -5- a specific fluid-structure is consistent with the way it was introduced by the application of a mould. The measurements of moisture absorption ...
    ... territory of Serbia. What makes it a unique phenomenon, in technological terms, is the fact that with the discovery of new techniques and production processes, the old ways, already adopted and mastered continued to live and actively coexist until today. This also brings a rise in imitations of pottery ...

  • 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.