Filters
total: 1115
filtered: 916
Search results for: NADPH OXIDASE
-
Oxide nanoparticle exsolution in Lu-doped (Ba,La)CoO3
Publication -
Solid Oxide Fuel Cells with Ni infiltrated perovskite anode
PublicationNiobium-doped strontium titanate was used as the anode for a solid oxide fuel cell. Electrolyte-supported cells were prepared with pure perovskite and composite perovskite–yttria–stabilized-zirconia (YSZ) anodes. Fuel cell tests demonstrated significant improvement in power density after infiltration with a small amount of Ni. The obtained values of power densities are comparable with conventional Ni/YSZ cermet anode. In addition,...
-
Oxide catalysts for carbon nanotube and few layer graphene formation
Publication -
On the graphitisation role of oxide supports in carbon nanotube CVD synthesis
Publication -
Covalent conjugation of graphene oxide with methotrexate and its antitumor activity
Publication -
Facile synthesis and properties of iron oxide spheres coated with carbon
Publication -
Reduced graphene oxide and inorganic nanoparticles composites – synthesis and characterization
Publication -
Hydration phase diagram for sodium cobalt oxide Na0.3CoO2·yH2O
Publication -
THE ROLE OF THIN FUNCTIONAL LAYERS IN SOLID OXIDE FUEL CELLS
PublicationWidespread commercialization of solid oxide fuel cells requires lowering its cost. It is generally accepted that to lower the cost of solid oxide fuel cells it is necessary to use metal alloys as interconnectors and, consequently, lower its operating temperature to slow down interconnectors degradation. As a result the area specific resistance of the cathodes should be lowered to sustain the performance of the cells. In order to...
-
Preparation of nano-tubular oxide layers on titanium alloy Ti13Nb13Zr
PublicationThe article presents results of oxidation tests and corrosion investigations of titanium alloy Ti13Nb13Zr preformed at different conditions. The oxide layers have been formed using electrochemical method in 2M H3PO4 + 0,3% HF solution for 30 min. and 1h at 20V constant voltage. The corrosion tests heve been made with poteniodynamic method in Ringer's solution at pH ranged 3 and 7. It has been shown that the nano-oxide films, which...
-
Solid oxide fuel cells with Ni-infiltrated perovskite anode
PublicationWytworzono próbki na bazie tytanianu strontu domieszkowanego niobem i przebadano wpływ nasączania niklem na właściwości tych materiałów.
-
Electron scattering by trimethylene oxide, c-(CH2)3O, molecules
PublicationZmierzono całkowity przekrój czynny na rozproszenie elektronów na drobinach c-(CH2)3O w zakresie energii 1 - 400 eV. Wyniki porównano z elastycznymi i jonizacyjnymi przekrojami czynnymi obliczonymi dla tej drobiny. Przedyskutowano energetyczną zależność całkowitego przekroju czynnego na rozproszenie dla rodziny eterów cyklicznych (CH2)nO, n=2-4.
-
Metal Supported Solid Oxide Fuel Cells - Selected Aspects
PublicationW artykule przedstawiono wyniki badań nad tlenkowymi ogniwami paliwowymi zbudowanymi na stalowym interkonektorze.
-
Fabrication and characterization of anode supported solid oxide fuel cells
PublicationW tej pracy, napylanie aerozolowe zawiesiny proszków jest oceniane jako metoda osadzania cienkich elektrolitów tlenkowych ogniw paliwowych. Metoda ta jest tania, prosta i mam zalety w stosunku do szeroko stosowanej metody sitodruku. Wpływ parametrów osadzania: stężenie zawiesiny, ciśnienie robocze są w artykule omawiane.
-
Graphene oxide aerogels for adsorptive separation of aromatic hydrocarbons and cycloalkanes
PublicationEfficient separation of benzene and cyclohexane has critical importance for production of commodity chemicals, and is one of the most challenging separations in the industry. Physisorption by recyclable, porous solids has a significant potential in substituting energy-intensive azeotropic or extractive distillation methods. Reduced graphene oxide aerogels (rGOAs) are emerging materials holding great promise for connecting unique...
-
Oxide nanoparticle exsolution in Lu-doped (Ba,La)CoO3
PublicationThis study investigated Lu doping of Ba0.5La0.5CoO3 and its influence on the exsolution of oxide nanoparticles (NPs). As a result of Lu doping, we observed the phase segregation into the main Ba0.4La0.6Co0.85Lu0.15O3 (BLCO–Lu) phase and the secondary Ba0.85La0.15Co0.75Lu0.25O3 (BCO–Lu) phase. We noticed the exsolution of BCO–Lu nanoparticles on the main BLCO–Lu phase. Moreover, the BLCO–Lu phase exsolved in the form of nanoparticles...
-
A study of a reduction of a micro- and nanometric bismuth oxide in hydrogen atmosphere
PublicationA reduction of bismuth oxide in hydrogen atmosphere was investigated. The reaction was performed with a material in various structural forms: powder: with micrometric grains, powder with nanometric grains and powder pressed into pellets. The process was performed in both isothermal and non-isothermal conditions. An activation energy of the reaction calculated with Friedman method was found to be about 85 kJ/mol for the reduction...
-
Influence of synthesis conditions on zinc oxide nanorode layer morphology
PublicationIn recent years one dimensional (1D) nanostructures (nanotubes, nanowires, nanoribbons and nanorods) have been widely studied. Among studied nano-materials, the greatest interest can be seen for zinc oxide (ZnO). However, there is still a need for simple, inexpensive and reproducible fabrication method. In the literature different fabrication methods can be found, most of them requires expensive equipment and involve complex...
-
A study of the kinetics of bismuth telluride synthesis by an oxide reduction method
PublicationThe kinetics of a reduction of bismuth and tellurium oxides in a hydrogen atmosphere, leading to the formation of thermoelectric bismuth telluride is investigated. The evaluation of the reaction kinetics was based on a thermogravimetric analysis performed in non-isothermal conditions. A non-parametric analysis method and the Friedman method were used for the evaluation of the data. Additionally, for a better understanding of the...
-
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...
-
Procognitive activity of nitric oxide inhibitors and donors in animal models
PublicationNitric oxide is a small gaseous molecule that plays important roles in the majority of biological functions. Impairments of NO-related pathways contribute to the majority of neurological disorders, such as Alzheimer’s disease (AD), and mental disorders, such as schizophrenia. Cognitive decline is one of the most serious impairments accompanying both AD and schizophrenia. In the present study, the activities of NO donors, slow (spermine...
-
Tailoring properties of reduced graphene oxide by oxygen plasma treatment
PublicationWe report an easily controllable, eco-friendly method for tailoring the properties of reduced graphene oxide (rGO) by means of oxygen plasma. The effect of oxygen plasma treatment time (1, 5 and 10 minutes) on the surface properties of rGO was evaluated. Physicochemical characterization using microscopic, spectroscopic and thermal techniques was performed. The results revealed that different oxygen-containing groups (e.g. carboxyl,...
-
Single chamber solid oxide fuel cell - investigation of cathodes
PublicationSporo uwagi w ostatnim okresie przykuwają jednokomorowe ogniwa w związku z potencjalnym uroszczeniem konstrukcji w porównaniu z konwencjonalnymi ogniwami. W pracy zbadano wpływ warunków syntezy różnych materiałów katodowych na wydajność ogniw. Ogniwa zbudowane zostały z typowych materiałow stosowanych na ogniwa: stabilizowanego tleneku cyrkonu jako elektrolit, cermetu niklowego jako anody oraz samaru kobaltanu domieszkowanego strontem,...
-
Hydration phase diagram for sodium cobalt oxide NaxCoO2*yH2O
PublicationPrzedstawiony został diagram fazowy uwodnionego, sodowo kobaltowego związku tlenkowego Na0.3CoO2*yH2O. Diagram powstał w oparciu o zależność stopnia uwodnienia (y) od wilgotności względnej w temperaturze pokojowej. Zaobserwowano trzy fazy: y = 0, 0.6 i 0.13. Zauważono histerezę przy zamianie kierunku procesu uwadniania.
-
Low-temperature processed anode for Solid Oxide Fuel Cells
PublicationPrzygotowano i przebadano kompozytową anode Ni/YSZ, która została przygotowana z wykorzystaniem technologii net shape. Wyniki potwierdziły, że kompozyt może być wykorzystany jako potencjalna anoda w tlenkowych ogniwach paliwowych.
-
Attaching an alkali metal atom to an alkaline earth metal oxide (BeO, MgO, or CaO) yields a triatomic metal oxide with reduced ionization potential and redirected polarity
Publication -
Aerobic Cytotoxicity of Aromatic N-Oxides: The Role of NAD(P)H:Quinone Oxidoreductase (NQO1)
Publication -
Natural Environments for Nanoparticles Synthesis of Metal, Metal Oxides, Core–Shell and Bimetallic Systems
Publication -
Structural Disorder in High-Spin {CoII9WV6} (Core)-[Pyridine N-Oxides] (Shell) Architectures
Publication -
Application of TOF-SIMS Method in the Study of Wetting the Iron (111) Surface with Promoter Oxides
Publication -
MnxCo3-xO4 spinel oxides as efficient oxygen evolution reaction catalysts in alkaline media
PublicationThe design of efficient electrocatalysts for oxygen evolution reaction (OER) is an essential task in developing sustainable water splitting technology for the production of hydrogen. In this work, manganese cobalt spinel oxides with a general formula of MnxCo3-xO4 (x=0, 0.5, 1, 1.5, 2) were synthesised via a soft chemistry method. Non-equilibrium mixed powder compositions were produced, resulting in high electrocatalytic activity....
-
Effects of Salvia officinalis and Thymus vulgaris on oxidant-induced DNA damage and antioxidant status in HepG2 cells
PublicationSalvia officinalis (SO) and Thymus vulgaris (TV) are medicinal plants well known for their curative powers. However, the molecular mechanisms responsible for these abilities of sage and thyme have not been fully understood yet. In this study we investigated the composition and the quantitative estimation of plant extracts, the protective effects of plant extracts against hydrogen peroxide- and 2,3-dimethoxy-1,4 naphthoquinone-induced...
-
Multilayer coatings based on cerium oxide and manganese cobaltite spinel for Crofer22APU SOC interconnects
PublicationThe current state of the art steel interconnect coating materials are based on critical raw material - Co-oxide spinels. Replacing Co-oxide spinels with alternative, abundant materials can reduce the dependence on the critical raw materials. Cobalt-free coatings with the general formula Mn2-xCuFexO4, where x = 0, 0.1, 0.3, were electrophoretically deposited on a ferritic stainless-steel support and evaluated. Prior to deposition,...
-
Nanotubular Titanium Oxide Layers for Enhancement of Bone-Implant Bonding and Bioactivity
PublicationThe present paper describes the techniques to improve the bioactivity of titanium and enhance the bone-implant bonding ability by the electrochemical anodization to fabricate titania nanotube arrays (TiO2).
-
Hydrogen-enhanced degradation and oxide effects in zirconium alloys for nuclear applications
PublicationThe zirconium alloys used in nuclear industry include mainly ZreSn and ZreNb alloys ofdifferent chemical composition, microstructure and susceptibility to both hydrogendegradation and oxidation. The hypothetic nuclear accidents can create a real danger tothe Zr alloys and stability of parts made of these alloys, and especially such as loss ofcoolant accident (LOCA) and reactivity initiated accidents (RIA). The hydrogen degradationcan...
-
High temperature corrosion of stainless steels for Solid Oxide Fuel Cells
PublicationW pracy przedstawiono wyniki korozyjności wysokotemperaturowej stali litych i porowatych stosowanych w tlenkowych ogniwach paliwowych.
-
Ellipsometry study of oxide formation on Cu electrode in 0.1 M NaOH
PublicationPrzedstawiono przykład zastosowania techniki elipsometrii monochromatycznej w celu określenia dynamiki wzrostu warstw tlenkowych i wodorotlenkowych na miedzi w środowisku 0.1M NaOH. Badania te stanowią część projektu skupiającego się na oznaczeniu fizycznych i elektrycznych własności tlenku miedzi (I) oraz tlenku miedzi (II) podczas procesu formowania się warstwy. Jednoczesne pomiary elipsometryczne i impedancyjne są nowatorskie...
-
Superconducting properties of under- and over-doped BaxK1−xBiO3 perovskite oxide
Publication -
Chemical and magnetic functionalization of graphene oxide as a route to enhance its biocompatibility
Publication -
Effect of iron oxide impregnated in hollow carbon sphere as symmetric supercapacitors
Publication -
Nasal nitric oxide in upper airways in children with asthma and allergic rhinitis
Publication -
Photocatalytic properties of Nafion membranes containing graphene oxide/titania nanocomposites
Publication -
The influence of implantation on mechanical degradation of the nanotubular oxide layer on titanium screws
Publication -
Graphene Oxide-Based Nanocomposites Decorated with Silver Nanoparticles as an Antibacterial Agent
Publication -
Characteristics of titanium nano-oxide (IV) as potent polymethyl metacrylate modifier
Publication -
Synthesis and characterization of resorcinol–formaldehyde resin chars doped by zinc oxide
Publication -
Nanotubular oxide layers and hydroxyapatite coatings on ‘Ti–13Zr–13Nb’ alloy
PublicationThe presented research was aimed to determine the mechanical properties of the nanotubular oxide layer covered with hydroxyapatite coating. The Ti–13Zr–13Nb alloy was oxidised in 1M phosphoric acid with an addition of 0?5% HF for HF solution at 20 V voltage. The electrochemically assisted deposition of hydroxyapatite was performed at cyclic polarisation in NH4H2PO4 and CaCl2 solution at 80uC. The mechanical properties were determined...
-
The Influence of ZnO Oxide Layer on the Physicochemical Behavior of Ti6Al4V Titanium Alloy
Publication -
Controlled oxidation of graphite to graphene oxide with novel oxidants in a bulk scale
Publication -
Nanocomposite of cement/graphene oxide – Impact on hydration kinetics and Young’s modulus
Publication