Претрага
810 items
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Malathion-induced inhibition of human plasma cholinesterase studied by the fluorescence spectroscopy method
The in vitro effect of technical grade malathion was assessed via the kinetic parameters of human plasma butyrylcholinesterase (BChE) using N-methylindoxyl acetate as a substrate for BChE. An inhibitor kinetics study demonstrated the existence of a biphasic inhibition curve, indicating high- and low-affinity binding sites of malathion. The IC50 values as calculated from the experimental inhibition curves were 1.33 × 10–9 and 1.48 × 10–5 M for the high- and low-affinity binding sites, respectively; Hill’s analysis gave 1.29 × ...V. M. Pavelkić, K. S. Krinulović, J. Z. Savić, M. A. Ilić. "Malathion-induced inhibition of human plasma cholinesterase studied by the fluorescence spectroscopy method" in Russian Journal of Physical Chemistry A, Pleiades Publishing Ltd (2008). https://doi.org/10.1134/S0036024408050312
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Determination of oxygen surface groups on biochars using Boehm-titration method
Krstić D. Aleksandar, Lolić Đ. Aleksandar, Ilić Marija, Mijatović Aleksandar, Zlatanović J. Snežana, Nedić P. Zoran, Pavelkić M. Vesna (2015)Krstić D. Aleksandar, Lolić Đ. Aleksandar, Ilić Marija, Mijatović Aleksandar, Zlatanović J. Snežana, Nedić P. Zoran, Pavelkić M. Vesna. "Determination of oxygen surface groups on biochars using Boehm-titration method" in 52. savetovanje Srpskog hemijskog društva, Belgrade, Serbia (2015): 16
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Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija
Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić (2015)Biougalj se dobija pirolizom iz organskog otpada. Smatra se ,,modifikatorom'' zemljišta i koristi se kao đubrivo i kao rezervoar za skladištenje ugljenika. Kvantifikacija funkcionalih grupa je važna zbog hemijske reaktivnosti biougljeva koji imaju uticaj na svojstva zemljišta. U istraživanju su korišćena 3 uzorka biouglja različitog porekla i jedan referentni, aktivni ugalj. Sadržaj kiselih funkcionalnih grupa je određivan titracijom po Boehm-u na dva načina: uvođenje N2 tokom titracije i tretman sa BaCl2. Optimizovan je način pripreme tri Boehm ova rastvora ...... površini biougljeva primenom Boehm-ovih titracija Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Određivanje sadržaja kiselih ...
... površini biougljeva primenom Boehm-ovih titracija | Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić | 52. savetovanja Srpskog hemijskog društva | 2015 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005644 Дигитални репозиторијум ...
... povréini biougljeva primenom Boehm-ovih titracija Aleksandar D. Krstié, Aleksandar D. Lolié, Marija A. li, Aleksandar M. Mijatovi¢*, ‘Snezana J. Zlatanovi¢'*, Zoran P. Nedi¢***, Vesna M. Pavelki¢**** Hemijski fakultet, Univerzitet u Beogradu, Studentski trg 12-16, Beograd, Srbija; *Rudarsko-geoloski ...Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić. "Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija" in 52. savetovanja Srpskog hemijskog društva, Srpsko hemijsko društvo (2015)
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Prevencija toksikacije lanca ljudske ishrane polihlorovanim bifenilima (PCB) primenom hemijskih postupaka degradacije
Dragan Manojlović, Olgica Cvetković, Ilić Marija, Vesna Pavelkić, Tomislav Jovanović, Miodrag Pavlović (2010)Dragan Manojlović, Olgica Cvetković, Ilić Marija, Vesna Pavelkić, Tomislav Jovanović, Miodrag Pavlović. "Prevencija toksikacije lanca ljudske ishrane polihlorovanim bifenilima (PCB) primenom hemijskih postupaka degradacije" in Nacionalna konferencija sa menunarodnim učešćem, Septembar 21-23, Divčibare, Zbornik radova, Beograd:Fakultet za ekologiju i zaštitu sredine, Univerzitet Union (2010): 404-410
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Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija
Krstić Aleksandar, Lolić Aleksandar, Ilić Marija, Mijatović Aleksandar, Zlatanović Snežana, Nedić Zoran, Pavelkić Vesna (2015)Krstić Aleksandar, Lolić Aleksandar, Ilić Marija, Mijatović Aleksandar, Zlatanović Snežana, Nedić Zoran, Pavelkić Vesna. "Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija" in 52. savetovanje Srpskog hemijskog društva, мaj 2015, Novi Sad, Srbija, Abstract AH P 5: Srpsko hemijsko društvo (2015): 16
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Characterization of biochar surface functional groups
In this work, biochar originating from paper fibres was examined. Biochar was prepared via pyrolysis method at 550°C. Oxygen-containing functional groups on biochar surface were determined. The surface functional groups of biochar were analysed by Fourier transform infrared spectroscopy. The amount of oxygen-containing functional groups was performed with Boehm titration. The total acidity of biochar was mostly attributed to carboxylic and lactonic groups.Marija Ilić, Vesna Pavelkić, Aleksandar Lolić, Branko Leković. "Characterization of biochar surface functional groups" in Šesti Naučno-stručni skup Politehnika, Beograd, 10. decembar 2021., Beograd : Akademija tehničkih strukovnih studija (2021)
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The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>
The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...... pepsin activityin vitro Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The influence of Al3+ion on porcine pepsin activityin vitro | Vesna M. Pavelkić, Kristina R. Gopcević, Danijela ...
... 0.80 0.62 0.44 400 _ . . . . 2300 _ [H b] / V 10* (m in )" 0.0 5.0x10% 1.0x10% U{AP |(M)' [.5x10% Figure 4. Activation of pepsin by Al * ions; The intercepts on the abscissa of the primary plot of [Hb]/V against reciprocal of activator concentrations provide the values ...
... function and kinetic of 35000Da and it derives from its zymogene ~ behaviour[12,13]. Jo ur na l of En zy me In hi Correspondence: V. M. Pavelkic, Department of Physical Chemistry, Institute of Nuclear Sciences Vinca, POB 522, 11001 Belgrade, Serbia. Tel: 381 11 245 39 67. Fax: 381 ...Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić. "The influence of Al3+ion on porcine pepsin activityin vitro" in Journal of Enzyme Inhibition and Medicinal Chemistry, Informa UK Limited (2008). https://doi.org/10.1080/14756360701841095
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Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate
Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić (2015)Microemulsion systems with water, toluene and nonionic surfactants are interesting for application due to the excellent solvent properties of aromatic hydrocarbons. In this study, the pseudo-binary phase diagram (“fish-diagram”) of such a ternary system was investigated using a branched technical alkyl polyethoxylate. Lutensol ON 50 (i-C10E5) was considered a suitable surfactant. The system with technical branched i-C10E5 exhibits very long, and for compositions near optimum solubilization, i.e., the minimum content of surfactant needed for a bicontinuous microemulsion, extremely long ...микроемулзија, толуен, оксоалкохол етоксилат, термодинамичка стабилност, тернарни фазни дијаграми, дијаграми „fish“Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić. "Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate" in Chemical Industry and Chemical Engineering Quarterly (2015). https://doi.org/10.2298/CICEQ141012045I
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Application of Peleg model on mass transfer kinetics during osmotic dehydratation of pear cubes in sucrose solution
Vesna Pavelkić, Tanja Brdarić, Marija Petrović, Gavrilo Šekularac, Milica Košević, Lato Pezo, Marija Ilić (2015)The applicability of Peleg model was investigated for predicting mass transfer kinetics during the osmotic dehydration (OD) process of pears, at different concentrations (40, 60 and 70%, w/w) and temperatures (20, 35 and 50 °C) of sucrose solution. Increase in sucrose solution concentration resulted in higher water loss (WL) and solid gain (SG) values through the osmotic treatment period. After 360 min of osmotic treatment of pears, WL ranged from 23.71 to 31.68% at 20 °C, from 24.80 to ...Vesna Pavelkić, Tanja Brdarić, Marija Petrović, Gavrilo Šekularac, Milica Košević, Lato Pezo, Marija Ilić. "Application of Peleg model on mass transfer kinetics during osmotic dehydratation of pear cubes in sucrose solution" in Chemical Industry and Chemical Engineering Quarterly (2015). https://doi.org/10.2298/CICEQ141014004P
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Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa
Mirjana V. Banković (2018-07-13)Profitabilna eksploatacija sve složenijih ležišta je težak zadatak koji zavisi odtemeljnog procesa analize, planiranja i projektovanja rudnika. Izvodljiv strateškiplan mora da zadovoljava društvena, regulatorna, tehnološka, geometrijska iekonomska ograničenja. Kako bi se postigao osnovni cilj, odnosno profitabilnost iodrživost rudarskog projekta na duži period, neophodno je unapređenjematematičkih modela i informatičke podrške procesima planiranja i optimizacijekoji će omogućiti efikasnu realizaciju ovih ciljeva...tehnološki model, integralni model, planiranje, optimizacija,utovarno-transportni sistem, neto sadašnja vrednost projekta... 204 Stevanovic, D., Banković, M., Rupar V., Milisavljević, V., Cvetić, A., Kržanović, D., 2017, Waste dump design optimization, case study open pit Drmno. 6th International Symposium Mining and Environmental Protection. Srbija. Stevanović, D., Malbašić, V., Čebašek, M., 2012, Optimizacija sistema transporta ...
... Tehnika, 4, 545-552. Stevanović, D. R., Kolonja, B. M., Stanković, R. M., Knežević, D. N., Banković, M. V., 2014, Application of stochastic models for mine planning and coal quality control. Thermal Science, 18 (4), 1361-1372. Ta, C. H., Kresta, J. V., Forbes, J. F., Marquez, H. J., 2005, A stochastic ...
... Vr = wp » Vr! = Sa (5.3) i=a Vi j=c vj gde je: y, - izlazna svojstva odsecka s,s € {1,2,...,m} Ys, - izlazna svojstva odse¢ka s’, s’ € {k + 1,...,m} v; - zapreminsko u¢éeS¢e slojaiurezus, i € {1,2,...,n} v; - zapreminsko u¢eS¢e sloja j u rezu s',j € {1,2,...,n} x’; - ulazna svojstva sloja i presecen ...Mirjana V. Banković. "Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-07-13)
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Geonasleđe Golije i Peštera
Ljiljana V. Grujičić-Tešić (2017-09-01)Sprovedena istraživanja u ovoj studiji obuhvatila su izdvajanje, opis, evaluaciju i valorizaciju objekata geonasleđa u cilju razvoja istraživane oblasti sa stanovišta geonauka, geoturizma i geoekologije. Na izučavanom području objekti geonasleđa su evidentirani, interpretirani, vrednovani i kategorisani, dat je predlog promocije geoobjekata, i na kraju predložena dopuna inventara objekata geonasleđa Srbije.U protekle četiri godine, na kompleksu geotopa Golije i Peštera istražena su geološka svojstva stena (tip stene, starost, fosilni sadržaj, morfološke i hidrogeološke karakteristike itd.), na osnovu čega je bilo ...... ) D V = E K + K F + ( 2 × E F ) Pr ist up ač no st (P R) V id lj iv os t ( V D ) D ru gi o bj ek ti u ok tu že nj u (D R) Tu ris tič ka in fra str uk tu ra (T I) E ko no m sk i p ot en ci ja l (E P ) U V = P R + V D + ...
... N O S T I (M n) D O D A T N E V R E D N O S T I (A v) R et ko st R ep re ze nt at iv no st Z na nj e o ge ol . n au ka . N iv o in te rp re ta ci je V id ik ov ci Po vr šin a O ko ln i p ej za ž A m bi je nt al no u kl ap an je ...
... govori stil gradnje. Most dužine 14 m i visine 4 m ima samo jedan otvor polukružnog oblika veličine 6,72 m, (Katanić i Gojković, 1961). Sve partije mosta rađene su od lomljenog kamena (kersantina), samo svod od tesanih komada kamena (travertin). Ljiljana V. Grujičić - Tešić Doktorska disertacilja ...Ljiljana V. Grujičić-Tešić. "Geonasleđe Golije i Peštera" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2017-09-01)
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The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system
Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми... Repository is available at: www.dr.rgf.bg.ac.rs Chemical Industry & Chemical Engineering Quarterly MARIJA ILIĆ! FRANZ-HUBERT HAEGEL? VESNA PAVELKIĆ? DRAGAN ZLATANOVIĆ“ SNEŽANA NIKOLIĆ-MANDIĆ* ALEKSANDAR LOLIĆ ZORAN NEDIĆE !Faculty of Mining and Geology, University of Belgrade, Belgrade ...
... B. Jakobs, M. Monken- busch, D. Richter, T. Sottmann, R. Strey, Phys. Rev. Lett. 85 (2000) 102-105 B. Jakobs, T. Sottmann, R. Strey, Tenside, Surfactants, Deterg. 37 (2000) 357-364 G. Gompper, D. Richter, R. Strey, J. Phys.: Condens. Matter 13 (2001) 9055-9074 R. Strey, M. Brandt, B. Jakobs ...
... Surface Science and Catalysis, Vol. 132, Y. Iwasawa, N. Oyama, H. Kunieda (Eds.), Elsevier Science, Amsterdam, 2001, pp. 39-44 H. Endo, M. Mihailescu, M. Monkenbusch, J. Allgaier, G. Gompper, D. Richter, B. Jakobs, T. Sottmann, R. Strey, l. Grillo, J. Chem. Phys. 115 (2001) 580-600 B. Jakobs ...Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic. "The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system" in Chemical Industry and Chemical Engineering Quarterly, National Library of Serbia (2016). https://doi.org/ 10.2298/CICEQ141105015I
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Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)
Howard R. Feldman, Barbara V. Radulović, Fayez Ahmad. "Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)" in Historical Biology (2023). https://doi.org/10.1080/08912963.2022.2122823
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Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event
Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco. "Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event" in Historical Biology (2023). https://doi.org/10.1080/08912963.2023.2190757
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Prikaz primene Pravilnika za izradu OIGK 1:100000 na primeru lista Niš
Lazić M., Jevremović Dragutin, Damnjanović Dobrica, Nikolić V, Cupać Saša. "Prikaz primene Pravilnika za izradu OIGK 1:100000 na primeru lista Niš" in Зборник радова XIV симпозијума из инжењерске геологије и геотехнике са међународним учешћем, Београд, 27. и 28. септембар, 2012., Београд:Друштво геолошких инжењера и техничара Србије (2012): 603-614
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Primena backcasting metodologije pri dugoročnom planiranju korišćenja biomase
Vukašinović V., Gordić D., Živković Marija, Živković D., Josijević M., Jurišević N.. "Primena backcasting metodologije pri dugoročnom planiranju korišćenja biomase" in Energija 20 no. 01-Feb (2018): 563-571
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Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
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An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)
N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero. "An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)" in Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier BV (2020). https://doi.org/10.1016/j.palaeo.2020.110145
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Iron (III) Oxide Fabrication From Natural Clay With Reference to Phase Transformation γ- → α- Fe2O3
Šaponjić A., Šaponjić Đ., Nikolić V., Milošević M., Marinović-Cincović M., Gyoshev S., Vuković M., Kokunešoski M. (2017)Šaponjić A., Šaponjić Đ., Nikolić V., Milošević M., Marinović-Cincović M., Gyoshev S., Vuković M., Kokunešoski M.. "Iron (III) Oxide Fabrication From Natural Clay With Reference to Phase Transformation γ- → α- Fe2O3" in Science of Sintering 49 no. 2, Srbija:Serbian Academy of Sciences and Arts (2017): 197-205. https://doi.org/https://doi.org/10.2298/SOS170
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Classification of Neolithic Ceramics and Clays According to Their Morphological Characteristics
Gajić Kvaščev Maja, Svoboda V., Jančić-Heinemann R., Dimitrijević M., Milovanović Dragan, Polić Radovanović Suzana (2012)Gajić Kvaščev Maja, Svoboda V., Jančić-Heinemann R., Dimitrijević M., Milovanović Dragan, Polić Radovanović Suzana. "Classification of Neolithic Ceramics and Clays According to Their Morphological Characteristics" in Mediterraneum Meeting Use of Multivariate Analysis and Chemometrics in Cultural Heritage and Environment-CMA4CH 2012, Rome, Italy:Rome University, La Sapienza (2012)