Претрага

Упит dcterms_subject_txt:max-min composition

307 items

  • Stepen metamorfizma metaklastita rudnika

    Vanja Ćuk (2024)
    Zadatak ovog rada je bio, potvrda saznanja da se na planini Rudnik dogodio kontaktni metamorfizam gornjokrednih sedimentnih stena i da se ispita intenzitet kontakto-metamorfnih promena. Posle kraćeg opisa geografskog položaja, pregleda ranijih istraživanja i geologije šireg područja, usmerena je pažnja na petrološka ispitivanja metaklastita i na kontaktno-metamorfne facije. Usled stvaranja različitih vulkanogenih facija odnosno usled vulkanskih erupcija, delovanjem zagrejane magme (lave) ili zagrejanih fluida, došlo je do kontaktnog metamorfizma, na granici oligocen-miocen i do stvaranja različitih metamorfnih stena, a ...
    Kontaktni metamorfizam, Rudnik, metakonglomerati, metapeščari, metaalveroliti

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica
    ... 187 [I > 2�(I)] 2644, 922, 840 [I > 2�(I)] Rint 0.040 0.045 (sin �/�)max (Š�1) 0.649 0.704 Refinement R[F 2 > 2�(F 2)], wR(F 2), S 0.013, 0.035, 1.17 0.027, 0.064, 1.14 No. of reflections 208 922 No. of parameters 20 26 � max, � min (e �3) 1.02, �0.44 1.40, �0.77 Computer programs: CrysAlisPro 1 ...
    ... 107, 0.444 No. of measured, independent and observed reflections 2409, 208, 187 [I > 2o(J)] 2644, 922, 840 [J > 2o(J)] Rint . 0.040 0.045 (sin 6/A) max (A7') 0.649 0.704 Refinement R[F? > 20(F’)], wR(F°), S 0.013, 0.035, 1.17 0.027, 0.064, 1.14 No. of reflections 208 922 No. of parameters 20 26 ...
    ... reported the first study on the magnetism of the structural family of Na3REESi2O7 compounds (REE = Ho, Yb), which are paramagnetic and similar in composition with respect to the K3YbSi2O7 samples investigated in this contribution. For several REE orthosilicates (REE2SiO5) and REE disilicates (REE2Si2O7) ...

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... P. van Vuuren, Environ. Sci. Policy 2016, 55, 75—86. [15] V. C. Williams (Sweet Water Dev. Company, Dallas. TX) US 3155610, 1964. [16] M. D. Max (Marine Desalination Systems Lic., St. Petersburg, FL) US 6475460, 2002. [17] Latteman, S. Development of an Environmental Impact Assessment and Decision ...
    ... pressure difference across the membrane drives the permeation process. The material of the membrane in addition to its configuration, morphology, composition, and operating conditions are all key factors that dictate its CO- performance to a great extent [41]|. Membrane separation for the removal of ...
    ... is dependent on the phase behavior of CO» and crude oil mixtures that are strongly dependent on reservoir temperature, pressure and crude oil composition. These mechanisms range from oil swelling and viscosity reduction for injection of immiscible fluids (at low pressures) to completely miscible ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... composite sulfur (3) must not exceed maximum allowed, Smax [%], during a shift (or period). X S T X T Si n i n i i i i i � � � � �1 1 max (3) Also, all working bucket wheel excavators (BWE's) must mine coal during a period (or shift). This constraint (4) which guarantees a minimum production ...
    ... following way. First, run of mine composite sulfur (3) must not exceed maximum allowed, Smax [%], during a shift (or period). Xj S; 7; Hl _<§ (3) max gar Also, all working bucket wheel excavators (BWE's) must mine coal during a period (or shift). This constraint (4) which guarantees a minimum production ...
    ... coal properties is essential for reli- able operational mine planning [8]. Generally two types of grade variability exist in the coal chemical composition (fig. 1): – long-term variability as measured by trends of monthly or longer duration, and – operational variability is generally measured by short ...

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... and 70 % acetic acid; the flow rate was 1 mL min-1 and the wavelength for thiamethoxam was 247 nm, for imidacloprid 250 nm and for clothianidin 260 nm. The retention time for thiamethoxam was 5.7 min, for imidacloprid 8.5 min and for clothianidin 7.4 min. For quantification purposes, calibration curves ...
    ... chromatograph equipped with a 25 m×0.22 mm ID×0.25 µm film BPX5 (SGE, Germany). The GC oven heating programme was 3 min hold at 60 °C, 60 °C to 300 °C at a rate of 3 °C min-1 and a 20 min hold at 300 °C. The injection was performed via a split/splitless injector at 270 °C; the splitless time was 60 s ...
    ... mL-1), 0.5 mL 5 % aqueous hypochlorite solution and 0.5 mL sodium hydroxide solution (0.5 M). The mixture was incub- ated 10 min for Indophenol Blue formation. After 10 min, the samples were diluted by adding a mixture of acetonitrile:water (1:1, V/V) to obtain a final volume of 10 mL. The mixtures ...

  • Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)

    Ljiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... If these layers are more pronounced, the subsidence from the surface to the depths is less manifested with increasing depth of recovery. If the composition of the bottom of the layer, and especially the roof layers for gasification, is suitable, this significantly mitigates the overall possible field ...

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... Client: Event number 106 - Operation: Miniranje | Date & time Tue 23 May 2006 11:53:26 Location: PK "Nepricava" Reg Length 38/1 kHz Operator: (Vector max (ch 1-3) 3.50 mm/s at 0.068 s Notes: MM-3 Timescale 0.4 s/div Channel 1 Channel Channel Input Geo Input Input Unit mm/s Unit Unit Trig level 4 Trig level ...
    ... and belongs to Kolubara District. The limestone deposit Nepričava consists of rock masses of sedimentary origin, not entirely homogeneous in composition. Limestones are the most important lithological members from both economic aspect and aspect of mining exploitation technology. Physical and mechanical ...

  • FrameNet Lexical Database: Presenting a Few Frames Within the Risk Domain

    Aleksandra Marković, Ranka Stanković, Natalija Tomić, Olivera Kitanović (2021)
    U radu se daje kratak prikaz teorije semantike okvira, na kojoj je zasnovana leksička baza Frejmnet. Predstavljena je koncepcija ove mreže, kao i mogućnosti njene primene. Predstavljena je i leksička analiza koja se primenjuje u projektu izrade Frejmneta i ukazano na razlike između analize zasnovane na okviru u odnosu na analizu zasnovanu na reči. Zatim je prikazano nekoliko povezanih okvira koje prizivaju reči iz domena rizika. U radu je predstavljena i platforma NLTК pomoću koje se mogu koristiti ...
    Srpski jezik, semantika okvira, FrameNet, scenario rizika, rudarski korpus, obrada prirodnog jezika
    ... added to the frames (in the case of Being_at_risk, the LU risk would be added). This is followed by the information on word class, meaning, formal composition (whether it is a single word or a multi- word expression), after which instructions are given on how the corpus 12 can be searched in order to extract ...

  • Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова

    Milena Rosić (2014-12-05)
    У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...
    Наноструктурни материјали, Оксиди, Термална анализа,Рендгенструктурна анализа, Магнетна мерења.
    ... modified glycine nitrate procedure with the following nominal composition: Ca0.95Gd0.05MnO3, Ca0.9Gd0.1MnO3, Ca0.85Gd0.15MnO3 and Ca0.8Gd0.2MnO3. The resulting powders were further calcined in the temperature range of 850 o C to 950 o C 10 min. The temperature range in which they were considered calcined ...
    ... дилатометријску анализу испитиваних узорака. Температурски програм је састављен из три ступња: 1. 1450 oC 10K/min 02:20:00; 2. 1450 oC 0K/min 00:10:00; 3. 400 oC -10 K/min 01:40:00. Дилатометром се истовремено бележи промена димензије узорака, температуре и времена. Докторска дисертација ...
    ... атмосфери ваздуха, у програмираном режиму температура/време. Брзина загревања узорака током синтеровања је била 5 о/min. Синтеровање је вршено на температурама од 1350, 1400 и 1450 оС 10 min. Густина испресака и синтерованих узорака је измерена методом хидростатичке ваге у ксилолу. Тврдоћа материјала ...

  • Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike

    Мирослав Црногорац, Душан Даниловић, Лола Томић (2020)
    ... laboratory methods were used. Sensory analysis was also performed by scoring method (max. 20). According to this research, it has been determined that goji berries, variety JB1, have a good nutritional composition, rich in bioactive components, and they are also an excellent raw material suitable ...
    ... metodom bodovanja (max.20). Pri tome korištena su čula za miris, ukus i dodir čime su utvrđeni izgled, boja, ukus i konzistenciju bobica godži. Dobijeni rezultati senzorne analize bobica godži: 4 boda (max.6) za boju, 3 boda (max.4) za miris, 3 boda (max.5) za ukus, 4 boda (max. 5) za konzistenciju ...
    ... bobica je određena senzorskom analizom, sa metodom bod sistem, sa maksimum 20 bodova u odnosu na sva svojstva (boja-max. 7; ukus-max. 4; miris-max. 4 i stanje plodova i izgled-max. 5 bodova) [11]. Dobijeni rezultati su obrađeni primenom standardnih statističkih metoda, Microsoft Exel 2010 kao i ...

  • Српски језик у дигиталном добу -- The Serbian Language in the Digital Age

    Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević (2012)
    Serbian language
    ... concerned, there is a highly developed suffixial word formation. With verbs, prefixation is also well developed (mainly related to aspectual meanings). Composition, on the whole, is less developed. Calques and coinages, as well as so-called exocen- tric noun compounds, are frowned upon by language purists, ...
    ... sko (squaw), or the adjectives fer (fair) or braon (brown). Well developed word formation (suffixation, prefixa- tion, and, to a lesser extent, composition and various combined word formation processes) results in the fact that the majority of lexemes can be grouped into word families, and nested entries ...
    ... morphology of Serbian. ey also form word fam- ilies according to Serbian word formation rules. 3.2.3 Lexis, phraseology, terminology, onomastics e composition of the vocabulary reflects, on the one hand, the fact that it is based on the Štokavian di- alect, not only with regard to the original inventory ...

  • Генеза хидротермалног Cu-Au система Чукару Пеки (Источна Србија)

    Милош Велојић (2021)
    Главни циљ испитивања хидротермалног система Чукару Пеки је разумевање процеса који су довели до његовог настанка, а посебно еволуције рудоносних флуида из којих је настала рудна минерализација. Утврђено је да је овај систем настао у периоду пре 86,78 - 85,19 Ma из магматског интрузива који је био богат водом и имао висок оксидативни потенцијал. Током хлађења, из овог магматског интрузива су издвојени веома врели флуиди, који су имали температуре изнад 600°С и висок салинитет. У ...
    Борска металогенетска зона, Тимочки магматски комплекс, порфирска лежишта, високосулфидациона лежишта, флуидне инклузије, рудне парагенезе, геохронологија, хидротермалне алтерације, LA-ICP-MS
    ... copper deposit, Chile, based on trace element composition and U/Pb age of zircons. Economic Geology 112:245-273. 86. Lee, R.G., Byrne, K., D’Angelo, M., Hart, C.J., Hollings, P., Gleeson, S.A., Alfaro, M., 2020. Using zircon trace element composition to assess porphyry copper potential of the Guichon ...
    ... 241-251. 35. Driesner, T., & Heinrich, C. A., 2007. The system H2O–NaCl. Part I: Correlation formulae for phase relations in temperature–pressure–composition space from 0 to 100 0 C, 0 to 5000 bar, and 0 to 1 XNaCl. Geochimica et Cosmochimica Acta, 71(20), 4880-4901. 36. Drovenik, M., 1961. Geolo ...
    ... South Carpathians (Romania). Tectonophysics, 404(1-2), 33-53. 42. Gagnevin, D., Daly, J. S., & Kronz, A., 2010. Zircon texture and chemical composition as a guide to magmatic processes and mixing in a granitic environment and coeval volcanic system. Contributions to Mineralogy and Petrology, ...

  • Prirodno prečišćavanje i stimulisana bioremedijacija podzemnih voda zagađenih naftnim ugljovodonicima

    Nenad M. Marić (2016-09-26)
    Disertacija se konceptualno sastoji iz dva dela kojima je obuhvaćen pasivan (prirodnoprečišćavanje) i aktivan remedijacioni pristup (stimulisana bioremedijacija) kodpodzemnih voda zagađenih naftnim ugljovodonicima.U prvom delu disertacije prikazani su rezultati osmatranja procesa prirodnogprečišćavanja u podzemnim vodama na lokaciji istorijskog zagađenja kerozinom.Tragovi zagađenja naftnim ugljovodonicima pronađeni su 20 godina nakon prosipanjakerozina. Ovo je stvorilo osnovu za proučavanje efekata dugotrajne izloženostipodzemnih voda procesima biodegradacije u terenskim uslovima. Uočeno je da sesnižene koncentracije elektron akceptora (O2, NO3-, SO42-) i povišene koncentracijemetaboličkih produkata biodegradacije ...
    podzemne vode, naftni ugljovodonici, kerozin, prirodno prečišćavanje,stimulisana bioremedijacija
    ... paljenja u zatvorenom sudu (°C) min 38 Neto specifična energija (MJ/kg) min 42,8 Tačka dimljenja (mm) min 20 Korozija bakarne trake - 2h na 100°C max 1 Tačka mržnjenja (°C) max - 47 Električna provodljivost (pS/m na °С) od 50 do 450 Sadržaj postojeće smole (mg/100 ml) max 7 Određivanje reakcije ...
    ... 0,840 Ukupan kiselinski broj (mg KOH/g) max 0,015 Sadržaj sumpora % (m/m) max 0,3 Sadržaj merkaptana % (m/m) mах 0,0030 Određivanje karakteristika destilacije Na 10 °C/% max 205 Kraj °C/% max 300 Ostatak % (v/v) max 1,5 Gubitak % (v/v) max 1,5 Kinetička viskoznost na -20 °C (mm2/s) ...
    ... diskusija 147 A B A b u n d an ce A b u n d an ce Retention time (min) A b u n d an ce C A B A b u n d an ce A b u n d an ce A b u n d an ce A b u n d an ce Retention time (min)Retention time (min) A b u n d an ce A b u n d an ce C Slika 4.59. Gasni hromatogrami ...

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... we realized that the answers obtained automatically in support of manual production of MWU lemmas can also help in detection of the syntactic composition of a MWU and therefore indicate the appropriate inflectional transducer. Namely, the MWUs in Serbian have predictable basic structures. For instance ...

  • Geološko-geofizički model dela Timočkog magmatskog kompleksa

    Snežana M. Ignjatović (2014-06-30)
    Timočki magmatski kompleks (TMK) u geotektonskom smislu pripada KarpatoBalkanidimaistočne Srbije, koji su deo Tekijsko-Dakijske jedinice. TMK je nastaotokom kontinuirane vulkanske aktivnosti, koja je trajala oko deset miliona godina iodvijala se generalno u tri faze (Zimmerman et al., 2008, Kolb et al., 2013, Banješević,2006). Pomeranje vulkanskog fronta je išlo od istoka ka zapadu (von Quadt et al., 2002,2003, 2007). Ovaj kompleks pripada tetijskom evroazijskom metalogenetskom pojasu usvetu poznat po ležištima bakra i zlata (Janković, 1990).U doktorskoj disertaciji su prikazani rezultati ...
    Timočki magmatski kompleks, aeromagnetska istraživanja, gravimetrijskaistraživanja, 2D geološko-geofizički model, Valja Strž, magmatsko telo
    ... sector of the Tethyan Eurasian metallogenic belt. Min. Deposita, 32, 426-433 Janković, S., Jelenković, R., 1998. Correlation between the Oravita- Krepoljin and the Bor-Srednegorie Metallogenetic zones. (IGCP Project no. 356). Romanian Journal of Min. Deposits, 78, Bucuresti, 57-70. Janković, S. ...
    ... each around 2.5-3 km in width and in some parts over 5 km. The results of the model suggested that there is also a gradual westward shift in composition which is evident from decreasing silica contents in the Senonian volcanic rocks. The results of 2D geological-geophysical model are significant ...
    ... ? Canadian Mineralogist 46, 249–261. Pačevski, A., Moritz, R., Kouzmanov, K., Marquardt, K., Ţivković, P., Cvetković, LJ., 2012. Texture and composition of Pb-bearing pyrite from the Čoka Marin polymetallic deposit, Serbia, controlled by nanoscale inclusions. Canadian Mineralogist, 50, 1, 1-20 ...

  • Kontaktni metamorfizam gornjokrednih sedimentnih stena Rudnika

    Kostić N. Bojan (2021)
    Kontaktni metamorfizam gornjokrednih sedimentnih stena na planini Rudnik ispitivan je na uzorcima iz pet bušotina. Definisano je šest varijeteta krednih stena (protolita) koji čine dve litološke jedinice izgrađene od klastičnog, karbonatnog i klastično-karbonatnog materijala. Vulkanskom aktivnosti na Rudniku formirana su vulkanska tela koja se utiskuju duž slojevitosti sedimentnih stena, a neka ih presecaju u vidu dajkova. Starost ovog vulkanskog događaja određena je na 23.9 miliona godina. Ovaj miocenski vulkanizam doveo je do kontaktno metamorfnih promena sedimentnih stena i obrazovanja skarnova ...
    Rudnik, kontaktni metamorfizam, sedimentne stene, hornfels, skarn, granati, vezuvijan
    ... hemijskih analiza usled neravnina na površini uzorka. Analize su rađene na uređaju marke JEOL JSM 6610LV povezanim sa energo-disperzivnim spektormetrom X-Max Oxford 20mm2 i talasno-disperzivnim spektrometrom Oxford Wave 500. Uzorci su pre analiziranja prekriveni elektroprovodnim slojem ugljenika od 15 nanometara ...
    ... analiza, sa dimenzijama analizirane tačke oko 2 mikrona ili kao kompletna analiza površine. Za ove potrebe korišćen je energo- disperzivni spektormetar X-Max Oxford 20mm2 (EDS). Prilikom analiziranja uzorka EDS detektorom, parametri samog uređaja bili su: - Ubrzanje elektronskog snopa 20kV; - Jačina struje ...
    ... consider grossularite-andradite garnets. Microprobe studies revealed on grossularite in the core of garnet crystals, and their rims of andradite composition. Sharp boundary between these two garnet compositions reflects on rapid changes in conditions of contact metamorphism during garnet crystallization ...

  • 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-blocker
    ... achieve better peak separation, gradient elution was used (flow rate 0.7 mL min !, ACN, and water mixture—15% ACN at the beginning increased to 25% ACN at 6 min, and after that, it was constant for the next 2 min; post time 1 min). 3.6. Computational Details All molecular DFT calculations were performed ...
    ... 60 120 Time (min) Time (min) Figure 12. NAD, PIN, and MET mixture degradation kinetics under UV irradiation: (a) without VOs and (b) with V»Os catalyst. 9.00 MDF W Photocatalysis 8.00 7.00 6.00 „. 500 — 4.00 3.00 2.00 1.00 0.00 0 5 10 30 60 ~ 120 Time (min) Figure 13. pH ...
    ... Hydrothermal method After 180 min degradation of VOs pure vanadium žžl:hšlrzl;?cgš)(MO) Visible light MO was 82% and 21] pentoxide nanoparticles ba CR was 99.61% Coprecipitation—calcination After irradiation for 20, 300, and V)Os/Al>Oy composite Reduction of Cr(VI), 20 min, the highest removal (or ...