Претрага
511 items
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Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije
Jana S. Stojković (2013-09-25)Mineralne vode još od davnina privlače pažnju ljudi i to kako u pogledu istraživanja iproučavanja, tako i u pogledu njihovog iskorišćavanja. Naročito je važno poznavanjesadržaja mikroelemenata u njima, jer su to komponente njihovog hemijskog sastavakoje ih odvajaju od tzv. „običnih“ malomineralizovanih voda.U ovom radu proučavani su odabrani esencijalni mikroelementi (fluor, bor, litijum,kalijum, stroncijum i silicijum), u mineralnim vodama Srbije, pri čemu je analiziranopreko 130 uzoraka mineralnih voda iz različitih geoloških sredina, to jest hidrogeološkihrejona. Cilj ovog istraživanja bio je ...esencijalni mikroelementi, faktori migracije, zakonomernosti rasprostranjenja, hidrogeohemijski procesi, multivarijantna statistička analiza, mineralne vode Srbije... characterization of an alluvial aquifer influenced by human activities.” Water, Air and Soil Pollution 112, Pp. 365-387. 47. Helsel, D. R. and Hirsch, R. M. (2002) “Statistical Methods in Water Resources.” In: Techniques of Water-Resources Investigations of the United States Geological Survey, U.S ...
... separate mineral waters from regular low mineralized tap water. The chosen essential microelements (fluorine, boron, lithium, potassium, strontium and silicon) in mineral waters of Serbia have been studied in this work. Over 130 mineral water samples from different types of aquifers and from different ...
... comparing detected microelements concentrations to the limits recommended by domestic and foreign drinking water regulations and guidelines. Applying hydrochemical modeling on chosen mineral water samples the presence of the most probable ion species of the analyzed microelements has been calculated ...Jana S. Stojković. "Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-09-25)
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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 pasteurii... modify soil characteristics resulting in stabilization from the action of wind and water erosion [3], removing heavy metals from wastewaters [4], or promoting the self-healing effect of calcareous materials [5]. The water absorption of the monumental limestone was reduced by 60% after the MICP treatment ...
... modify soil characteristics resulting in stabilization from the action of wind and water erosion [3], removing heavy metals from wastewaters [4], or promoting the self-healing effect of calcareous materials [5]. The water absorption of the monumental limestone was reduced by 60% after the MICP treatment ...
... YE-CaCl2 broth. A total volume of inoculated media was centrifuged (10,000 rpm, 15 min) and the deposits were washed out three times by sterile distilled water, dried to constant mass. The precipitates were subjected to FTIR spectrophotometric analysis (Hartmann & Braun MB-series). The bacterial growth on Urea ...Olja 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
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Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals
Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić (2020)As the number of poorly soluble drugs is increasing, nanocrystals have become very interesting due to wide range of application possibilities. Curcumin was used as a model active ingredient in this work. Even though it has many proven positive effects, due to its physicochemical issues, its possibilities have not been fully exploited. The goal of this work was to select optimal conditions for a top-down method for curcumin nanosuspension production, and to perform their comprehensive characterization applying complementary methodologies: ...Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić. "Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals" in Review on advanced materials science, Walter de Gruyter GmbH (2020). https://doi.org/10.1515/rams-2020-0043
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Validation of vulnerability assessment by means of the Time Dependent, Model: case study from the Slovenian karst catchment
Groundwater vulnerability assessment methods are continuously being developed and existing methods are very often modified to provide better simulation of natural protection conditions and more objective results. Most frequently used methods are based on calculation of predefined parameters influencing water infiltration and underground flow, which can often lead to bias conclusions related to vulnerability evaluations. Some other methods, like the Time Dependent Model (TDM) are based on an approach, where parametrization is obtained at the final stage of the ...Ocena ranjivosti podzemnih voda, karstne podzemne vode, TDM metoda, delineacija sanitarnih zona, Slovenački karstVladimir Živanović, Nataša Ravbar, Igor Jemcov. "Validation of vulnerability assessment by means of the Time Dependent, Model: case study from the Slovenian karst catchment" in Proceedings of IAH2019, the 46th Annual Congress of the International Associaton of Hydrogeologists, Málaga (Spain), September 22-27, 2019, International Association of Hydrogeologists (IAH) (2019)
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Mikroelementi u kvartarnim sedimentima i lignitu Kostolačko-kovinskog ugljonosnog basena, istočna Srbija – odabrani primeri
Sadržaj, distribucija i način pojavljivanja elemenata u tragovima (mikroelemenata), posebno potencijalno toksičnih i radioaktivnih elemenata u uglju, su od velikog značaja, posebno ako se koriste kao gorivo u termoelektranama (TE). Na osnovu sistematski prikupljenih podataka o elementima u tragovima u uglju, zemljištu i sedimentima, moguće je utvrditi stepen zagađenosti vazduha, zemljišta, vode, kao i negativan uticaj na zdravlje ljudi. Eksploatacija i istraživanje lignita u Kostolcu i Kovinu traje više od jednog veka, dok se sagorevanje lignita sa površinskih kopa ...Bogoljub Vučković, Biljana Radovanović, Dragana Životić. "Mikroelementi u kvartarnim sedimentima i lignitu Kostolačko-kovinskog ugljonosnog basena, istočna Srbija – odabrani primeri" in 18. Kongres geologa Srbije "Geologija rešava probleme", Divčibare, 01-04 jun 2022., Srpsko geološko društvo (2022)
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Development Of The Serbian Geological Resources Portal
... Djerdap, DRAGIŠIĆ, Monitoring groundwater resources of Serbia: Drafting the map of the vulnerability of underground water resources of Serbia, 2007-2011. (together with the Institute for water management “Jaroslav Cerni”), STEVANOVIĆ, Z. 2009., Translation of the published cartographic content and the content ...
... for searching cata- logues: projects, archive documentation and bibliog- raphy, documentation of the funds and research- exploitation permits for water and solid mineral resources10. The above-mentioned searches were derived from the basic model which is based on mul- tiple entry of key words, phrases ...Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić. "Development Of The Serbian Geological Resources Portal" in Proceedings of the 17th Meeting of the Association of European Geological Societies, Belgrade, Serbia : The Serbian Geological Society (2011)
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Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia
Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...... including the basin margins, where Mesozoic and Paleozoic sediments outcrop on the surface. 7,410,000 7,412,000 7,414,000 „420, a w 7,424,000 7,426,000 7,428,000 7,430,000 » A NZ ELB drillhole 4, 91 0, 00 0 Water temperature *C 11 - 20 e 21-30 e 31-40 4, 90 8, 00 0 Cross section line ...
... significant karst aquifer is formed on the basin's southern margin, with groundwater from the middle Triassic limestone being utilized for the public water supply of Valjevo, Mionica and surrounding settlements. Karst groundwater under artesian pressure and elevated temperatures (17–37 "C) are taped with ...
... Existing data indicate that the limestones of the Middle Triassic are characterized by a significant degree of karstification and that they are more water-bearing than compared to the Lower Triassic. However, to consider the geothermal potential, the Triassic sediments are interpreted as a unique carbonate ...Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić. "Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia" in Proceedings 9th International Conference mining and environmental protection, MEP23, Sokobanja, 24-27th May 2023, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet (2023)
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Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)
Kostadin J. Jovanov (2016-06-24)Leţišta uglja „Suvodol“, „Brod-Gneotino“ su u eksploataciji, a leţište uglja „Ţivojno“je u fazi pripremi. Nalaze se u krajnjem jugoistočnom i juţnom delu Pelagonijskekotline. Sva tri leţišta stvorena su u neogenim sedimentima u jezerskim uslovimasedimentacije u zoni kontakta sa prekambrijumskim kristalastim stenama. Kod sva trileţišta ugalja se javljaju više slojeva različite debljine, u okviru kojih se nalaze klastičnisedimenti (gline, peskovi i dr.). U podini ugljenog basena nalaze se kristalaste steneprekambrijumske starosti.Teren u okolini leţišta uglja karakteriše se umereno kontinentalnom klimom, ...ugalj, podzemne vode, površinske vode, neogeni kompleks, izdani,transmisibilnost, nivo podzemne vode, sniţenje nivoa... Neogen sediments and precipitation water which is directly excreted fromopen areas of surface pits. Drainage of coal mines is combined, with circumferential channels for acquisition of surface water which flows from the slopes, the channels for acquisition of water in layer’s pits and drainage wells ...
... hydro geographic network, contaminated water, air and land, change of regimes and surface water as well as modifications in the flora and fauna. The analyses of the balance of water in coal deposit “Suvodol” established that the recharge of ground water in the upper interlayer aquifer (MI1) is ...
... mining activities, water quality and taking certain measures during the closing, conservation of mining works and re-cultivation of terrain (closing and forestation coal slope, management of space and the bay surrounding water areas). Key words: coal, ground water, surface water, Neogene complex ...Kostadin J. Jovanov. "Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-06-24)
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Mikrobiološki diverzitet kiselog jezera Robule i uticaj jezerske vode na oksidaciju sulfidnih minerala
Srđan B. Stanković (2016-09-11)Jezero Robule, formirano u podnožju rudničke raskrivke Oštreljski planir (Rudnik bakra Bor), je nastalo kao posledica rudarskih aktivnosti. Mikrobiološki diverzitet ekstremno kiselog jezera Robule ispitivan je primenom kako klasičnih mikrobioloških metoda (svetlosna mikroskopija i kultivacija na selektivnim podlogama) tako i primenom savremene metode molekularne biologije (analiza polimorfizama terminalnih restrikcionih fragmenata; T-RFLP). Takođe, ispitivan je i potencijal i efikasnost jezerske vode u biološkom luženju mineralnog koncentrata, kao i u bioluženju uzoraka stare flotacijske jalovine Rudnika bakra Bor.Na osnovu dobijenih rezultata ...... on selective solid media. Microbial diversity of thick, green colored mat, formed in shallow water, was also analyzed. Light microscopy revealed the presence of the green filamentous algae on the surface of the biomass, while T-RFLP analysis of the 16S rRNA genes amplified from metagenomic DNA ...
... DNA isolated from the mat revealed significantly higher bacterial diversity when compared to the diversity of the Lake’s surface water. The most abundant T-RFs originated from algae and heterotrophic acidophilic bacteria closely related to genera Acidocella, Acidiphilium and Sulfobacillus. Chemo ...
... Marković R., Jonović R., Avramović Lj., Bugarin M., Stevanović J. (2013) Mine waste water management in the Bor municipality in order to protect the Bor River water in Einschlag F.S.G. and Carlos L. (editors): Waste water - treatment technologies and tecent analytical developments, InTech, Rijeka, DOI: ...Srđan B. Stanković. "Mikrobiološki diverzitet kiselog jezera Robule i uticaj jezerske vode na oksidaciju sulfidnih minerala" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-09-11)
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Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles
Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...... reactions 1495 123 atmosphere during the titrations, was purified by passing it through 10 % NaOH, then 10 % H2SO4, and finally dis- tilled water. Ultrapure water was used for preparation of all solutions. Preparation of the complexes The complex [Ru(trpy)(bpy)Cl]Cl was prepared according to the published ...
... various acid-base models. The best model, selected according to the above-mentioned method of calculation, was consistent with the deprotonation of water molecules and formation of hydroxo and l-hydroxo complexes, as given in Eqs. (2–4). The calculated values of hydrolysis constants are given in Table ...
... various acid-base models. The best model, selected according to the above-mentioned method of calculation, was consistent with the deprotonation of water molecules and formation of hydroxo and p-hydroxo complexes, as given in Eqs. (2-4). The calculated values of hydrolysis constants are given in Table ...Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović. "Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles" in Monatshefte für Chemie - Chemical Monthly, Springer Science and Business Media LLC (2013). https://doi.org/10.1007/s00706-013-1044-1
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New data from the Lower Cretaceous carbonate platform deposits of Dimitrovgrad section (Southeastern Serbia)
... area of Getic unit defined Beriasian, Valanginian, Hauterivian and Urgonian like facies. These deposits result from the continuous trend of shallow- water sedimentation that started in the Middle Jurassic time. Recent studies on the Getic carbonate platform succession focused on outcrops in Romania and ...Jelena Stefanović, Bojana Džinić, Giovanna Della Porta, Dejan Radivojević. "New data from the Lower Cretaceous carbonate platform deposits of Dimitrovgrad section (Southeastern Serbia)" in 90° Congresso della Società Geologica Italiana, Trieste, 14-16 septembar, 2021, Società Geologica Italiana (2021)
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Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive
Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić (2011)... Groundwater Use for Belgrade’s Water Supply, Conference: Groundwaters as Sources of Water Supply, Association for Water Technology and Sanitary Engineering, 191-218, Belgrade 2. Dimkić, D., Je%ić, G., Dimkić, M., Soro, A., (2003): �e Krupac Spring hydraulic potential for water supply requirements of the ...
... Stevanovic, Z., Jemcov, I., Milanovic, S., Dokmanovic, P., Hajdin, B. (2005): Management of Karst Aquifers in Serbia for Water Supply – Achievements and Perspectives, In : Water resources and environmental problems in karst, Proceedings of the IAH Conf. KARST 2005, Stevanovic, Z. and Milanovic, P ...
... the city of Niš, XXX IAHR Congress, �eme B: Urban and Rural Water Systems for Sustainable Development, �essaloniki, Greece, pps. 653-660, August 2003 3. Dimkić M., Stevanović Z., Djurić D., (2011): Progress and improvement of the status of groundwater in Serbia, Proceedings of IWA Specialist Groundwater ...Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić. "Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive" in Naših 40 godina, Beograd : Rudarsko-geološki fakultet (2011): 49-77
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Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone
The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...Emő Márton, Marinko Toljić, Vesna Cvetkov. "Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone" in Journal of Geodynamics, Elsevier BV (2022). https://doi.org/10.1016/j.jog.2021.101880
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Distribution of major and trace elements in the Kovin lignite (Serbia)
Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...... Kovin lignite (Serbia) 65 literich layers indicating an unstable water table from higher to lower water level in the mire and less wet conditions. A predomi nance of detrohuminite with lower ash content confirms decline of water level in the mire. High amounts of inertinite in these samples can ...
... sediments; b) Pannonian (Late Miocene) marly sediments; c) Pontian (Late Miocene; RÖGL, 1996) shallow, caspibrackish to fresh water sediments; d) Lower Pliocene fresh water clastic sedi ments, as described in detail in MITROVIĆ et al. (2016). In the Upper Miocene (Pontian) clastic coalbearing series ...
... lanthanides and Y. 5. DISCUSSION The mineral matter in coal seams and deposits depends on the combination of specific plant constituents influenced by water level, regional depositional and paleoenvironmental factors, which control the enrichment or depletion of the different ele ments and mineral phases ...Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović. "Distribution of major and trace elements in the Kovin lignite (Serbia)" in Geologia Croatica, Croatian Geological Survey (2019). https://doi.org/10.4154/gc.2019.06
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First paleomagnetic and magnetic anisotropy results from Montenegrо - the coastal area
... bauxites, Middle Eocene nummulitic limestones, transitional marls, andUpper Eocene flysch. It is thrusted over by the Budva zone characterized by deep water sedimentsof Triassic through Paleogene ages with tuffitic layers in the Ladinian. The uppermost unit is theHigh Karst zone developed in a carbonate ...Emö Márton, Vesna Cvetkov, Martin Đaković, Vesna Lesić, Slobodan Radusinović. "First paleomagnetic and magnetic anisotropy results from Montenegrо - the coastal area" in General Assembly 2021, Europen Geosciences Union (2021)
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Postojeće stanje i budući trendovi u preventivnoj zaštiti podzemnih voda Srbije
Vladimir Živanović (2022)Podzemne vode predstavljaju osnovni, a u mnogim zemljama i jedini resurs za javno vodosnabdevanje stanovništva tako da zaštita podzemnih voda predstavlja bitan preduslov za njihovo dugotrajno i održivo korišćenje. Kako u svetu, tako i u Srbiji, zaštita podzemnih voda se najvećim delom svodi na primenu preventivnih mera zaštite. Kod planiranja zaštite većih prostora sve više se koriste metode za ocenu ranjivosti podzemnih voda. Njihova primena je posebno naglašena u karstnim područjima zato što se tu izdvajaju delovi terena sa ...Zaštita podzemnih voda, karte ranjivosti podzemnih voda, karta hazarda, karte rizika od kontaminacije, monitoring podzemnih voda, SrbijaVladimir Živanović. "Postojeće stanje i budući trendovi u preventivnoj zaštiti podzemnih voda Srbije" in Zbornik radova XVI srpskog Simpozijum o hidrogeologiji sa međunarodnim učešćem, Univerzitet u Beograd, Rudarsko-geološki fakultet (2022)
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The influence of rainfall factors on soil resistance to erosion
Nikola Živanović, Vukašin Rončević, Carla Ferreira, Milica Kašanin-Grubin, Stevan Ćorluka, Veljko Rupar, Vladimir Čebašek (2024)Nikola Živanović, Vukašin Rončević, Carla Ferreira, Milica Kašanin-Grubin, Stevan Ćorluka, Veljko Rupar, Vladimir Čebašek. "The influence of rainfall factors on soil resistance to erosion" in EGU General Assembly 2024, Vienna, Austria, Apr 14–19, 2024, Copernicus GmbH (2024). https://doi.org/10.5194/egusphere-egu24-1137
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Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite
Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...... well with asbestos. On the contrary, the broad O-H band peaking at ~3400 cm~! with a d shoulder at 3200 cm~! is assignable to water traces adsorbed at the pore surface, as observed for many ceramics. Materials 2020, 13, 3597 5of 18 Figure 2. SEM micrographs showing;, asbestos fiber clusters ...
... samples, and the lowest water content is also found for these samples (measured by the lower intensity of the 3200 cm—! broad band). The 3400 cm-! component may arise from the clay-based matrix [45] being, more or less transformed by the firing. We can expect that the lowest water content is related ...
... visible on the cross-section. Details for the spectrum of sample a are given on the bottom (B). Materials 2020, 13, 3597 11 of 18 3.4. OH Groups, Water and Clays Modes characteristic of O-H vibrations are only detected in grain cores (Figure 9), which is ascribed the de-hydroxylation induced by ...Philippe Colomban, Aleksandar Kremenović. "Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite" in Materials, MDPI AG (2020). https://doi.org/10.3390/ma13163597
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Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic
Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...... 95 bar completion simple recovery method secondary waterflood Produced Fluid Properties water cut 70 % fluid viscosity <0.1 Pas corrosive fluid no sand and abrasives <10 ppm GOR 650 m3/m3 VLR <0.1 Surface Infrastructure location offshore electrical power utility well service pulling unit Energies ...
... completion simple recovery method secondary waterflood Produced Fluid Properties water cut 70 % fluid viscosity <0.1 Pas corrosive fluid no sand and abrasives <10 ppm GOR 650 m3/m3 VLR <0.1 Surface Infrastructure location offshore electrical power utility well service pulling unit ...
... amount of paraffin in the production fluid, the number of artificial methods that can be used is reduced. Parameter C5 represents water cut. With the increase in water in the production fluid, methods that can produce larger quantities of fluid are more widely used. 3.2. Synthesis Part of the Model ...Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković. "Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic" in Energies, MDPI AG (2020)
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Petrological and geochemical studies of lignite from the Tamnava West field, Kolubara basin (Serbia)
Milena Pajić, Reinhard F. Sachsenhofer, Achim Bechtel, Ksenija Stojanović, Vladimir Krstić, Dragana Životić (2021)... Significant aromatisation of triterpenoids during diagenesis with microbial activity is also present 1n Tamnava West lignite implying the changes of water column level resulted in slight variations of redox settings and pH during peat stage. ...Milena Pajić, Reinhard F. Sachsenhofer, Achim Bechtel, Ksenija Stojanović, Vladimir Krstić, Dragana Životić. "Petrological and geochemical studies of lignite from the Tamnava West field, Kolubara basin (Serbia)" in 72nd Annual Meeting of the International Commitee for Coal and Organic Petrology (ICCP), The Prague, Chech Republic, 19th – 25 th September, ICCP (2021)