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Search results for: EPS-TiO2
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The protective properties of graphene oxide coatings functionalized with phosphorus atoms.
PublicationRecently, electrophoretically deposited graphene oxide coatings are commonly applied as an anti-corrosion layer. However, improper adjustment of electrophoretic deposition (EPD) parameters as well as the hydrophilic nature of graphene oxide contribute to the formation of defects in the coatings and the increase in the wetting properties, respectively, and thus lead to a reduction of protective properties. The growth of wetting...
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Experimental tuning of AuAg nanoalloy plasmon resonances assisted by machine learning method
PublicationPlasmonic nanostructures based on AuAg nanoalloys were fabricated by thermal annealing of metallic films in an argon atmosphere. The nanoalloys were chosen because they can extend the wavelength range in which plasmon resonance occurs and thus allow the design of plasmonic platforms with the desired parameters. The influence of initial fabrication parameters and experimental conditions on the formation of nanostructures was investigated....
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Electrochemical performance of Co3O4/CeO2 electrodes in H2S/H2O atmospheres in a proton-conducting ceramic symmetrical cell with BaZr0.7Ce0.2Y0.1O3 solid electrolyte
PublicationThe electrochemical performance of Co3O4/CeO2 mixed oxide materials as electrodes, when exposed to H2S/H2O atmospheres, was examined employing a proton conducting symmetrical cell, with BaZr0.7Ce0.2Y0.1O3 (BZCY72) as the solid electrolyte. The impact of temperature (700–850 °C) and H2S concentration (0–1 v/v%) in steam-rich atmospheres (90 v/v% H2O) on the overall cell performance was thoroughly assessed by means of electrochemical...
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High-Temperature Tensile Behaviour of GTAW Joints of P92 Steel and Alloy 617 for Two Different Fillers
PublicationThis study explores the high-temperature (HT) tensile rupture characteristics of a dissimilar gas-tungsten-arc-welded (GTAW) joint between P92 steel and Alloy 617, fabricated using ER62SB9 and ERNiCrCoMo-1 fillers. The high-temperature tensile tests were performed at elevated temperatures of 550 ◦C and 650 ◦C. An optical microscope (OM) and a field emission scanning electron microscope (FESEM) were utilized to characterize the...
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Fabrication of anti-corrosion nitrogen doped graphene oxide coatings by electrophoretic deposition
PublicationThis work assesses anti-corrosion properties of graphene and N-doped graphene coatings deposited on copper by an electrophoretic method. Graphene oxide (GO) precursor was synthesized by an improved Hummers' method, whereas N-doping was performed hydrothermally in the presence of ammonia. After nitrogenation, doped graphene oxide samples (NGO) contained a reduced amount of oxygen and about 9% w/w nitrogen as pyridinic, pyrrole,...
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Analysis of an Energy Management System of a Small Plant Connected to the Rural Power System
PublicationThis paper presents the analysis of an energy management system (EMS) implemented to fulfill the requirements of a microgrid (MG) power supply owned by a small industrial company and connected to the rural power system. The main goal of this system is to ensure connection with the existing rural power system in terms of energy exchange, as well as to perform islanding mode operation of the microgrid based on the energy demand of...
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Luminescent properties of Ln3+ doped tellurite glasses containing AlF3
PublicationThe low-phonon energy tellurite glasses TeO2-BaO-Bi2O3 and TeO2-BaO-Bi2O3-AlF3 triply doped with Eu3+, Tb3+, Tm3+ ions in two different molar ratios were synthesized using melt-quenching technique. Their structure and luminescence properties were widely investigated by X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR) and Photoluminescence Spectroscopy (PL). The luminescence...
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Ocena jakości dostępnych na rynku suplementów diety zawierających kwasy tłuszczowe z rodziny n-3
PublicationCoraz większą uwagę zwraca się obecnie na uzupełnianie diety w NNKT, zwłaszcza kwasy EPA i DHA z rodziny n-3, w które bogaty jest olej rybi. Zbadano jakość dostępnych na krajowym rynku suplementów diety produkowanych z oleju rybiego w postaci kapsułek żelatynowych, ze szczególnym uwzględnieniem składu kwasów tłuszczowych i stabilności oksydatywnej.
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Rozwój metod i narzędzi do nagniatania
PublicationW rozdziale przedstawiono przykłady stosowania nagniatania w technologii wałków, sworzni, zaworów, tuleji cylindrowych oraz konstrukcję narzędzi nagniatających i tokarko-nagniatarkę CNC - opracowane w Katedrze Technologii Maszyn i Automatyzacji Produkcji Politechniki Gdańskiej. Podano także przykład zastosowania obróbki przez nagniatanie w adaptacynym systemie ESP oraz kierunki dalszych prac rozwojowych w obszarze technologii nagniatania.
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Diagnostyka analogowych filtrów wielosekcyjnych oparta na magistrali testującej IEEE1149.1
PublicationPrzedstawiono nową koncepcję testera JTAG BIST do samo-testowania torów analogowych opartych na wielosekcyjnych filtrach wyższego rzędu w mieszanych sygnałowo mikrosystemach elektronicznych sterowanych mikrokontrolerami i wyposażonych w magistralę testującą IEEE1149.1 (JTAG). Bazuje ona na metodzie diagnostycznej opartej na przekształce-niu transformującym próbki odpowiedzi czasowych kolejnych sekcji filtra pobudzonego impulsem...
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Stability Investigation of the PCM Nanocomposites
PublicationEnsuring the stability is a key issue to be solved for the technical application of nanocomposites. In this work, fatty acid P1801 served as base phase change material (PCM)P1801, and its main ingredients are palmitic acid (58%) and stearic acid (38%). Titania (TiO2) and alumina (Al2O3) with mass concentrations of 1% and 5% were selected as nanoparticles, while polyvinylpyrrolidone (PVP) or oleic acid (OA) with mass concentrations...
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Properties of Nasicon-based CO2 sensor with Bi8Nb2O17 reference electrode
PublicationGas sensors are useful for the carbon dioxide concentration monitoring in many applications. The major challenge is to develop a potentiometric sensor working without the necessity of a reference gas and without a need of the reference electrode encapsulation. Important issue is a selection of reference electrode material, which should provide stable reference potential. For example as reference electrode material in sensor based...
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Magnetic field effects in dye-sensitized solar cells controlled by different cell architecture
PublicationThe charge recombination and exciton dissociation are generally recognized as the basic electronic processes limiting the efficiency of photovoltaic devices. In this work, we propose a detailed mechanism of photocurrent generation in dye-sensitized solar cells (DSSCs) examined by magnetic field effect (MFE) technique. Here we demonstrate that the magnitude of the MFE on photocurrent in DSSCs can be controlled by the radius and...
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Zastosowanie analitycznej mikroskopii elektronowej w badaniach pyłów PM10 ze stacji Gdańsk - Wrzeszcz
PublicationPrzedstawiono wyniki pierwszych w Gdańsku badań pyłów z wykorzystaniem mikroskopii elektronowej. Opisano sposób przygotowania próbek do badań w SEM i TEM oraz wyniki analizy morfologicznej i jakościowej z użyciem widm EDS lub EDX. Stwierdzono występowanie 6 charakterystycznych grup pyłów o różnym składzie chemicznym i wielkościach zawierających się w przedziale 8-800 nm.
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The parallel environment for endoscopic image analysis
PublicationThe jPVM-oriented environment to support high performance computing required for the Endoscopy Recommender System (ERS) is defined. SPMD model of image matching is considered and its two implementations are proposed: Lexicographical Searching Algorithm (LSA) and Gradient Serching Algorithm (GSA). Three classes of experiments are considered and the relative degree of similarity and execution time of each algorithm are analysed....
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Cross sections for electron collision with pyridine [C5H5N] molecule
PublicationThe absolute grand -total cross section (TCS) for electron scattering from pyridine, C5H5N, molecules has been measured at impact energies from 0.6 to 300 eV in the linear electron-transmission experiment. The obtained TCS energy dependence appears to be typical for targets of high electric-dipole moment; the cross section generally decreases with rising energy, except for the 3–20 eV range, where a broad enhancement peaked near...
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Improved Performance of 1-Ethyl-3-Methylimidazolium Tetrafluoroborate at Steel/HCl Interface by Iodide Ions
PublicationThe corrosion and corrosion inhibition of St37 steel in 0.1 M HCl solution by 1-ethyl-3-methylimidazolium tetrafluoroborate (EMITFB) and the effect of addition of KI on the inhibitive performance of EMITFB have been examined by electrochemical [electrochemical impedance spectroscopy, potentiodynamic polarization, and dynamic electrochemical impedance spectroscopy (DEIS)] and surface examination [scanning electron microscope (SEM)...
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The production and properties of the secondary metabolites in selected car-nivorous plants = Produkcja i właściwości metabolitów wtórnych wybranych roślin owadożernych
PublicationPięć gatunków roślin owadożernych (Drosera aliciae, D. capensis, D. ramenta-cea, D. rotundifolia oraz Sarracenia psittacina ) zostało zbadanych pod ką-tem produkcji i właściwości metabolitów wtórnych między innymi flawonoidów inaftochinonów. W tym celu rośliny poddano elicytacji in vitro przy użyciuelicytorów abiotycznych - TYTANIT, kwas jasmonowy, BION oraz biotycznych -chityna i Enterobacter sakazaki. Badane związki ekstrahowano...
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Electron scattering cross sections for 1-pentene, H2C=CH-(CH2)2CH3, molecules
PublicationCross sections, both experimental and theoretical, are reported for electron scattering from 1-pentene (C5H10) molecules. Absolute grand-total cross sections (TCSs) were measured at electron impact energies ranging from 1 to 300 eV, using a linear electron-transmission technique. The dominant behaviour of the experimental TCS energy function is a distinct asymmetric enhancement with the maximum located around 6.5 eV. Discernible...
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Noise and Electro-Ultrasonic Spectroscopy of Conducting PolymerThick Films
PublicationThick conducting films based on conducting polymer are characterized by DC conductivity and noise in temperature range 10 to 300 K. Conducting polymers could be used e.g. for the top electrode (cathode) in the solid tantalum or niobium capacitors. On the conducting polymer layer the top layer of carbon/graphite and/or silver polymer based pastes is applied in the capacitor technology. Our samples structure consists of conducting...
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Analiza technologii lutowania próżniowego stali austenitycznej
PublicationCelem badań była ocena poprawności budowy złącza lutowanego próżniowo ze stali austenitycznej oraz analiza składu chemicznego charakterystycznych obszarów badanej próbki. Na podstawie badań wizualnych oraz metalograficznych na mikroskopie skaningowym (w tym analizy EDS) stwierdzono, że badane złącze charakteryzuje się prawidłową geometrią, jednak występują w nim liczne niezgodności (wydzielenia), co świadczy o nieprawidłowych parametrach...
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Badania różnicy koloru laminatów z żelkotem modyfikowanym nanocząstkami w środowisku wodnym – metody obliczeniowe ΔEab, ΔE94, ΔE00
PublicationW Artykule przedstawiono rozważania na temat interpretacji wyników oraz wpływu metody obliczeniowej różnicy koloru na wyniki ΔE. Zbadano wpływ dodatku nanocząstek SiO2 w laminacie epoxydowo-szklanym na zmianę koloru podczas ekspozycji w środowisku wodnym.
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Higher harmonics of the intensity modulated Photocurrent/Photovoltage spectroscopy response - a tool for studying photoelectrochemical nonlinearities
PublicationIn this work, a higher harmonic analysis (HHA) of the intensity modulated photocurrent/photovoltage (IMPS/IMVS) spectroscopy data is proposed as a potent tool for studying nonlinear phenomena in photoelectrochemical and photovoltaic systems. Analytical solutions of kinetic equations were constructed for cases of single and double resonance accounting for various sources of higher harmonics. These sources correspond to the physical...
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Peroxymonosulfate-assisted photocatalytic degradation of artificial sweeteners in water
PublicationIn the present study, peroxymonosulfate (PMS) activation was proposed for efficient photocatalytic degradation of aspartame, acesulfame, saccharin, and cyclamate - artificial sweeteners frequently present in wastewaters and surface waters worldwide. The TiO2 nanosheets with exposed {0 0 1} facets were synthesised using the fluorine-free lyophilisation technique as a green concept for the synthesis and used for the photodegradation...
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Stability investigation of the PCM nanocomposites
PublicationIn present study was showed the results of research the stability of nanoPCMs in terms of types and concentrations of surfactant used. For stearic acid has been added PVP or oleic acid in concentrations of 0%, 5% and 10%. Nanoparticles TiO2 and Al-2O3 in concentration of 1% were chosen to be researched in this test. The mixing of nanocomposites has been done in an ultrasonic scrubber in which the samples were placed for 45 mins....
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Ordered titania nanotubes layer selectively annealed by laser beam for high contrast electrochromic switching
PublicationThe phase conversion from amorphous into crystalline one in the selected area of as-anodized titania nanotubes was achieved via laser treatment. The optimized processing parameters enable fast, one-minute crystallization of titania within an area limited by a shadow mask and without any morphology damage of ordered TiO2 tubular film. The laser annealed titania nanotubes could be easily overgrown by a conducting polymer without...
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Experiments on compression ignition engine powered by nano-fuels
PublicationThe use of nanoparticles in fuels provides new opportunities for modification of fuel properties, which may affect the operational parameters of engines, in particular the efficiency and fuel consumption. The paper presents comparison of compression ignition engine performance fuelled with neat diesel and nano-diesel. Alumina (Al2O3) was used as nanoparticles. Surface-active substances, including Span 80 surfactant, as well as...
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Kalendarium działalności środowiska Ruchu Społeczeństwa Alternatywnego 1980-1990
PublicationKalendarium obejmuje fragment historii Ruchu Społeczeństwa Alternatywnego z lat 1980-1990 (nie ujęto okresu do 2005 i dalej, jako wykraczającego poza zainteresowania IPN i ECS). Zostało stworzone przy współpracy kilkudziesięciu osób związanych z RSA i zredagowane przez jego uczestników na podstawie materiałów archiwalnych (m.in. z IPN), informacji w prasie oficjalnej i podziemnej (w tym własnej) oraz wspomnień uczestników wydarzeń
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Zastosowanie nagniatania w obróbce wykończeniowej części maszyn
PublicationW pracy przedstawiono możliwości stosowania różnych odmian obróbki nagniataniem w technologii dokładnych części maszyn szczególnie klasy wałek. Dokonano porównania efektów obróbkowych przedmiotów obrabianych przez nagniatanie i toczenie. Podano przykłady stosowania nagniatania w produkcji wałków wraz z narzędziami i obrabiarką CNC opracowanymi w Katedrze Technologii Maszyn i Automatyzacji Produkcji Politechniki Gdańskiej. Przedstawiono...
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Dydaktyczne stanowisko laboratoryjne do zdalnego zarządzania elementami instalacji elektrycznej budynku
PublicationW artykule przedstawiono metody zdalnego monitorowania i sterowania urządzeniami instalacji elektrycznej standardu KNX. W szczególności zwrócono uwagę na możliwości wykorzystania programu ETS, biblioteki Falcon, serwera OPC wraz z oprogramowaniem typu SCADA oraz sterownika umożliwiającego zdalne zarządzanie instalacją za pomocą przeglądarki internetowej z dowolnego komputera podłączonego do sieci Internet. Przedstawiono elementy...
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Wpływ struktury siluminu na skrawalność = Effect of silumin structure on machinability
PublicationBadano odlewy ciśnieniowe ze siluminu EN AC-AlSi7Cu2 pochodzące z dwóch partii różniące się skrawalnością, w zakresie składu chemicznego, mikrostruktury na mikroskopie świetlnym i skaningowym z EDS oraz składu fazowego na dyfraktometrze rentgenowskim. Stop o niższej skrawalności posiadał mniejszą dyspersję eutektyki, większe stężenie tytanu w roztworze aluminium, wydzielenia fazy międzymetalicznej Al i Ti oraz większe skupiska...
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Automatyzacja procesu pozyskiwania wiedzy dla systemów ekspertowych.**2003,187 s. 24 rys. 7 tab. bibliogr. 248 poz. Rozprawa doktorska (2003.12.02) PG, Wydz. Elektroniki, Telekomunikacji i Aytomatyki. Promotor: Prof. dr. hab. M. Białko
PublicationPodczs tworzenia systemow ekspertowych występuje problem pozyskania wiedzy zdanej dziedziny. Duże korzyści daje zastosowanie szkieletowych systemów eks-pertowych z wbudowanym modulem automatycznego pozyskiwania wiedzy z istnie-jacych baz danych. Zbudowano i opisano w pracy system CLIPS-XT posiadajacyoryginalne moduły: indukcyjnego wydobywania wiedzy z baz danych za pomocą generowania drzew decyzyjnych i ich konwersji na reguły...
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Analysis of the selection of low-temperature medium for a turbine power plant using ocean thermal energy (OTEC)
PublicationThe paper presents the results and conclusions of numerical calculations modelled in the EES program of a closed OTEC cycle. The following mediums were analysed: ammonia, R32, R41, R404a, R407c, R410a, R423a, R500, R502, R507a and R114, R152a, R234fa, R600, R1234yf, R1234ze. Analogous assumptions were adopted as in the ORC cycle with heat regeneration for dry refrigerants without regeneration for wet refrigerants. Each of them...
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Hybrid of Neural Networks and Hidden Markov Models as a modern approach to speech recognition systems
PublicationThe aim of this paper is to present a hybrid algorithm that combines the advantages ofartificial neural networks and hidden Markov models in speech recognition for control purpos-es. The scope of the paper includes review of currently used solutions, description and analysis of implementation of selected artificial neural network (NN) structures and hidden Markov mod-els (HMM). The main part of the paper consists of a description...
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Analysis of the selection of low temperature medium for a turbine power plant using ocean thermal energy (OTEC)
PublicationThe paper presents the results and conclusions of numerical calculations modelled in the EES program of a closed OTEC cycle. The following mediums were analysed: ammonia, R32, R41, R404a, R407c, R410a, R423a, R500, R502, R507a and R114, R152a, R234fa, R600, R1234yf, R1234ze. Analogous assumptions were adopted as in the ORC cycle with heat regeneration for dry refrigerants without regeneration for wet refrigerants. Each of them...
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Price Changes in Wholesale Market of Electrical Energy in Poland
PublicationThe article discusses the Price changes on the wholesale electricity market in Poland Moreover, The price levels on the futures electricity markets and the spot transactions market are presented. The impact of emission charges under the EU ETS on the price of electricity in the domestic market has been taken into consideration Furthermore, the basic determinants of the generation structure in Poland that influence the level of...
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DEGRADATION OF GFRP MARINE LAMINATES WITH NANO PARTICLE MODIFIED COATINGS
PublicationWater absorption and surface blistering behaviour was studied for polyester-matrix laminates with SiO2 nanoparticle reinforced gel coats. Accelerated water immersion tests at 37°C showed that addition of 10% nanoparticles increases blisters incubation time by ca. 50% compared to 5% and 0% nanoparticles composites.
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Device characteristics extraction by low frequency noise measurements; Someresults on the state-of-the-art MOSFET´s
PublicationPrzedstawiono wyniki pomiarów i analizy szumów tranzystorów MOSFET z izolatorem bramki wykonanym z SiO2 i HfO2. Wyniki pomiarów wykorzystano do oszacowania gęstości aktywnych stanów na powierzchni użytego tlenku i porównano z wynikami otrzymanymi metodą charge-pumping.
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The Central European GNSS Research Network (CEGRN) dataset
PublicationThe Central European GNSS Research Network (CEGRN) collects GNSS data since 1994 from contributors which today include 42 Institutions in 33 Countries. CEGRN returns a dataset of coordinates and velocities computed according to international standards and the most recent processing procedures and recommendations. We provide a dataset of 1229 positions and velocities resulting from 3 or more repetitions of coordinate measurements...
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Detection of the Plant Pathogen Pseudomonas Syringae pv. Lachrymans on Antibody-Modified Gold Electrodes by Electrochemical Impedance Spectroscopy
PublicationThe present work describes an impedimetric immunosensor for Pseudomonas syringae pv. lachrymans (Psl) detection. This pathogen infects many crop species causing considerable yield losses, thus fast and cheap detection method is in high demand. In the assay, the gold disc electrode was modified with 4-aminothiophenol (4-ATP), glutaraldehyde (GA), and anti-Psl antibodies, and free-sites were blocked with bovine serum albumin (BSA)....
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Enhanced electrochemical performance of partially amorphous La0.6Sr0.4CoO3-δ oxygen electrode materials for low-temperature solid oxide cells operating at 400 °C
PublicationThis work evaluates partially amorphous La0.6Sr0.4CoO3-δ (LSC) as a potential oxygen electrode for lowtemperature solid oxide cells. LSC was deposited using the spin-coating technique onto Ce0.8Gd0.2O2-δ (CGO) substrates. The optimal oxygen electrode thickness was determined as 500 nm. The electrochemical impedance spectroscopy (EIS) study showed a significant improvement in oxygen reduction/oxidation reaction kinetics when annealing...
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Cross-sections for electron-scattering from 2-methyl-1-buten-3-yne, C 5 H 6 , molecules
PublicationtCross-sections for electron collisions with the 2-methyl-1-buten-3-yne [H2C C(CH3)C CH] moleculewere measured and calculated. Absolute grand-total electron-scattering cross-section (TCS) was takenat impact energies from 0.6 to 300 eV in the linear electron-transmission experiment. The TCS energydependence for the electron–C5H6collision has two prominent enhancements separated with a deepminimum located near 1.8 eV. In addition,...
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Modelowanie polskiego podsystemu wytwarzania energii elektrycznej w programie MARKAL ze szczególnym uwzględnieniem Europejskiego Systemu Handlu Emisjami
PublicationArtykuł dotyczy problematyki emisji gazów cieplarnianych w Unii Europejskiej oraz działań mających na celu ich redukcję, w szczególności Europejskiego Systemu Handlu Emisjami (EU ETS). Model polskiego podsystemu wytwarzania energii elektrycznej, uwzględniający mechanizmy EU ETS, został opracowany za pomocą pakietu optymalizacyjnego MARKAL. Do modelu wprowadzono dane zebrane na podstawie dostępnych projektów, rozporządzeń i danych...
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Optimizing the Copper Content in GdBa0.5Sr0.5Co2-XCuxO5+δ Double Perovskites as the High Performance Oxygen Electrodes for Reversible Solid Oxide Cells
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Electrospun Nanofiber Electrodes with in situ Exsolved Nanocatalysts for Symmetrical SOCs
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Optimization of Transport Properties of A-Site Ordered LnBa1-xSrxCo2-yFeyO5+ Perovskite-Type Cathode Materials
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Coking Study in Anode Materials for SOFCs: Physicochemical Properties and Behavior of Mo-Containing Perovskites in CO and CH4 Fuels
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Efficient and Economically Favorable Co-Free Air Electrodes for Solid Oxide Cells
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(Invited) Effect of Individual Dopants in Nano-SOI-MOSFETs and Nano-pn-Diodes
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Materials for Mediator-free Electron Transfer in the Enzymatic Electrodes of Biobatteries and Biofuel Cells
PublicationWe present functionalization of single-walled carbon nanotubes (SWCNTs) and their application in the enzymatic fuel cells construction. SWCNTs were covalently modified with different types of aromatic moieties. Free radical reaction was employed to create direct carbon-carbon bond between moiety and SWCNTs. In second approach functionalization takes place through amide bonding. Functionalized SWCNTs were characterized by spectroscopy...