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Упит dcterms_subject_txt:top-down method

508 items

  • Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2

    Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)
    Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... of tumor cells into the healthy tissue. We can only speculate that potential inhibitory effect of metallo- drugs on the secretory PLA2 might slow down the process of protrusion of tumor cells by decreasing the concentration of mediators of cellular signaling, such as metabolites of arachidonic acid ...
    ... MALDI-TOF MS has been already shown to be a powerful technique for the analysis of bipyridine metal complexes,27 and therefore it is used here as a method of first choice. Tested metal complexes affect the enzymatic aLaboratory of Physical Chemistry, Institute of Nuclear Sciences ‘‘Vinča’’, University ...
    ... colorimetric methods, which might be applied for this purpose, suffer from low sensitivity.33,34 Previously, MALDI-TOF MS was shown to be a suitable method for sensitive detection of the PLA2 activity.31 We selected this approach for monitoring concen- tration changes of LPLs, as products of the PC digestion ...

  • Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays

    Vladimir Simić, Dragana Životić, Zoran Miladinović (2021)
    Management, Monitoring, Policy and Law,Nature and Landscape Conservation
    ... deposits are relatively small deposits with layers of bentonite of small thickness, mostly medium or poor quality of raw materials, and underground method of exploitation (Table 3). In addition, high transport costs prevent potential exports, and domestic utilisation is impossible without bentonite ...
    ... bentonite clays in Serbia [53]. Size of deposit after [44]. None of these deposits are in operation. Deposit Size of Deposit Quality (Grade) Method of Exploitation Number of Layers and Their Thickness (M) Depth of Bentonite Layers (M) 1. Bentonite Vrdnik Large Good Underground 3 (0 ...
    ... measured resources and, finally, with proven reserves if the deposit is morphologically homogenous and has the good quality of IMR. However, this method- ology cannot be accepted in the case of inhomogeneous deposits with variable quality and the strict correlation based on a single deposit analysis ...

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... 2020). In Slovenia, samples were obtained from the country's only working coal mine Velenje; a mine which uniquely employs the underground exploitation method. 2.2. Geological settings of the sampled deposits 2.2.1. Poland The majority of Poland's territory belongs to the European Paleogene–Neogene Basin ...
    ... detritic coals from opencast mines may reduce future GHG emissions. On the other hand, the detritic lignites that are exploited via the underground method (Velenje mine) show the potential to serve as a source of coalbedmethane to be captured and utilized for energy-generation pur- poses. The development ...
    ... 213–225. https://doi.org/10.1515/logos-2016- 0022. Widera, M., Jachna-Filipczuk, G., Kozula, R., Mazurek, S., 2007. From peat bog to lignite seam: a new method to calculate the consolidation coefficient of lignite seams, wielkopolska region in Central Poland. Int. J. Earth Sci. 96, 947–955. https://doi.org/ ...

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... performance of the system and environmental analysis. Koll- mann et al. (2017) proposed a novel method to assess the integration of wastewater treatment plants (WWTPs) into local energy supply concepts. The method addresses spatial, economic and environmental perspectives. Different approaches for evaluation ...
    ... systems. J Clean Prod 247:119583. https:// doi. org/ 10. 1016/j. jclep ro. 2019. 119583 Standard EN 15316-4-5 (2017) Energy performance of buildings— Method for calculation of system energy requirements and system efficiencies—Part 4–5. District heating and cooling Statistical Office of the Republic of ...

  • The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis

    Ljiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua (2021)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Geotehnički uslovi izgradnje tunela „Debelo brdo“ na autoputu E-80 Niš - Pločnik

    Dragoslav Rakić, Radojica Lapčević, Irena Basarić Ikodinović, Dragan Lukić (2022)
    Tunel „Debelo brdo“ nazvan je po najizraženijem relјefnom obliku na ovoj drugoj deonici autoputa E-80 Niš – Pločnik. Osnovnu geološku građu na lokaciji tunela čini Mio-Plioceni kompleks heterogenog litološkog sastava. Izgradnja tunela je predviđena delom u otvorenom iskopu dužine 240 m, a delom sa podzemnim iskopom dužine 190 m. U zoni tunela, padina je okarakterisana kao uslovno stabilna, pa bi neadekvatna zasecanja mogla da izazovu klizanja terena. Iz tih razloga, u okviru rada posebno su prikazani geotehnički uslovi izgradnje ...
    Tunel „Debelo brdo“, Geotehnički parametri, Privremene kosine, Šipovi, Podgrada.
    ... prve faze iskopa: a) ruga faza iskopa za tunel; d) Izgradnja tunela na delu sa podzemnim iskopom po principima NATM (New Austrian Tunneling Method) , a nakon to - ankera, i izrada privr druge slonove stope, ugradnja drugog reda mikro drugog Sekundarnu podgradu treba nsko slabljenje i smanjenje ...

  • Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака

    Зоран Гојковић (2023)
    Површински коп, као систем који обезбеђује енергетску стабилност или снабдевање сировинама које су од изузетне важности за привредни напредак, својим функционисањем утиче на околна насељена места. Међу бројним аспектима овог утицаја, може се издвојити издвојити и анализирати утицај вертикалних и хоризонталних померања која се јављају на површи терена. Мониторинг вертикалних и хоризонталних померања површи терена околних насељених места треба да има што бољу временску резолуцију (временски период између праћења деформација) како би се вертикална и хоризонтална померања контролисала и ...
    Сентинел 1 интерферометрија, слегање, Перманентни скатерери, Костолац

  • 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.
    ... powders of perovskite manganite structure, as well as single-phase solid solutions with a perovskite structure. As a suitable method used is a modified glycine nitrate method, a precursor nitrates and acetates of the respective metals. Modification of the procedure was performed by partial replacement ...
    ... (2001): Recent Developments of the Program FULLPROF, in Commission on Powder Diffraction (IUCr), Newsletter, 26:12, (http://journals.iucr.org/iucr-top/comm/cpd/Newsletters/). Rosić, M., Logar, M., Devečerski, A., Prekajski, M., Radosavljević-Mihajlović, A., Kusigerski, V., Spasojević, V., Matović ...
    ... Synthesis, structural and magnetic properties of Ca1-xGdxMnO3 nanopowders Abstract In this thesis, examined the optimal method for obtaining nano powders - calcium manganese oxide doped with gadolinium ions. The aim of the research is to examine the appropriate precursors ...

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... and design. Ventilation design is just one element or phase of the novel design approach. The component diagram on Fig.1 illustrates the proposed method that can be divided into six separate components. The first phase of the outlined methodology is data acquisition. In contemporary mining practice ...

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... and design. Ventilation design is just one element or phase of the novel design approach. The component diagram on Fig.1 illustrates the proposed method that can be divided into six separate components. The first phase of the outlined methodology is data acquisition. In contemporary mining practice ...

  • Why classical sequence stratigraphy doesn't work in Pannonian basin?

    Dejan Radivojević (2018)
    basen iza ostrvskog luka, detačment, miocen, Panonski basen, riftogeneza, sekvenciona stratigrafija
    ... nuous  high frequency reflections. Unlike bottom units in this sequence there is no progradation present, while  the  seismic  reflections  toward  top  become more  discontinuous.  The  lower  sequence  part  could  be   178 correlated with  delta  and  coastal  sediments, where  the  upper  part  ...
    ...   MATERIAL AND METHODS    The regional composite seismic transect (figure 1) with length of more than 260 km at which rift  sequence stratigraphy method is demonstrated is made to determine the range of base level change, as  well as  tectonic and  sedimentary  relationships. The  transect  covers entire  ...

  • Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia

    Jelka Krušić , Biljana Abolmasov, Miloš Marjanović (2021)
    The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...
    tecišta, zadržavanje nanosa, RAMMS, validacija

  • Multihazard Exposure Assessment on the Valjevo City Road Network

    Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)
    Prirodni hazardi, izloženost, klizišta, poplave, bujice, GIS, R

  • 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
    ... the same sampling time using pH-meter HI99161 (Hanna Instruments, Woonsocket, RI, USA). The number of viable cells was determined by the streaking method into triplicate on TSA with Urea and incubated 24 h at 30 ◦C. The evaluation of the rate coefficient for ureolysis was performed by integrating the ...
    ... −kprecipitate · t ) (5) Rate constants for the evaluation of ureolysis and reduction in calcium ions were presented using a nonlinear regression method using the Solver function in Microsoft Excel 2019. Microorganisms 2021, 9, 1691 6 of 20 2.5.2. Determination of Calcium Concentration The sterile ...
    ... approach for assessing the quality of olive cake pellets. Fuel Process. Technol. 2013, 116, 250–256. [CrossRef] 20. Shukla, A.; Cameotra, S.S. A new method for the screening of ureolytic bacteria inducing calcium carbonate precipitation. J. Biotechnol. Biomater. 2016, 6, 248–251. [CrossRef] 21. Mitchell ...

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Contribution to the geotechnical classification of municipal waste landfills in Serbia

    Dragoslav Rakić, Irena Basarić, Laslo Čaki, Slobodan Ćorić (2018)
    Management, Monitoring, Policy and Law, Nature and Landscape Conservation, Geochemistry and Petrology, Waste Management and Disposal,Geotechnical Engineering and Engineering Geology,Water Science and Technology,Environmental Chemistry,Environmental Engineering

  • The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>

    Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić (2008)
    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 ...
    Пепсин, алуминијум, кинетика, активација, електрофоретска мобилност
    ... (TCA) and potassium chloride (KBr) were obtained from MERCK, all of reagent grade werec prepared prior to use. Ensyme assay "The Worthington method based on enzyme-catalyzed measured rate of hydrolysis of denatured haemoglobin (Hb) substrate was used for evaluation of enzyme activity in the ...
    ... enzymcein reaction mixture () U anius, /mg — Estimation of hinetic barameters Kinetic analysis was carried out according to a slightly modified method of Anson [26], by following the initial velocity of the enzymatic reaction in the absence and presence of AU?(1.7-·10 "-8.7·:10 *~M) and increasing ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... and professionals “Karst: From Top to Bottom”, took place online on June 6, 2021. The conference was attended by 64 participants from across the world. Učesnici virtuelne konferencije „Karst: Od vrha do dna” Participants of the virtual conference “Karst: From Top to Bottom” Professional excursion ...
    ... Planning and the Water Directorate of Serbia (within the first groundwater vulnerability map of Serbia in scale 1:b00,000 was created, using the IZDAN method, whose authors are CKH members), and also projects Research, evaluation and importance of groundwater resources in the concept of sustainable d ...
    ... podzemnih voda u sklopu projekta Operativni monitoring podzemnih voda Srbije (desno) Final groundwater vulnerability map o Serbia according to the IZDAN method (left); Groundwater monitoring locations as part of the project ”Operational Groundwater Monitoring of in Serbia” (right) 13 15 CKH Međunarodnhi ...

  • Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове

    Јелка Крушић (2023)
    Тецишта су комплексне појаве нестабилности које захтјевају истраживања и испитивањакоја до сада нису рађена код нас у области геотехнике. По механизму, начину активирањаи понашању покренутог материјала се знатно разликују од клизишта. Циљ оведисертације је била примјена нумеричких модела пропагације тецишта на примјеру двијепојаве које су се десиле у Србији као посљедица дјеловања циклона Тамара. Детаљноистраживање тецишта подразумијева теренско картирање, теренска истраживања илабораторијска испитивања одабраних узорака са терена. Од теренских истраживања напримјеру тецишта Селанац урађена су геофизичка истраживања Електричнетомографије док ...
    тециште, нумерички модели пропагације, циклон Тамара, геофизичка истраживања, лабораторијска испитивања, Селанац, Лева река, RAMMS, SPH geoflow, реолошки модел