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Search results for: TOTAL ELECTRON CONTENT
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Praseodymium Orthoniobate and Praseodymium Substituted Lanthanum Orthoniobate: Electrical and Structural Properties
PublicationIn this paper, the structural properties and the electrical conductivity of La1−xPrxNbO4+δ (x = 0.00, 0.05, 0.1, 0.15, 0.2, 0.3) and PrNbO4+δ are presented and discussed. All synthesized samples crystallized in a monoclinic structure with similar thermal expansion coefficients. The phase transition temperature between the monoclinic and tetragonal structure increases with increasing praseodymium content from 500 ◦C for undoped...
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Plasticity of Bead-On-Plate Welds Made with the Use of Stored Flux-Cored Wires for Offshore Applications
PublicationExtreme atmospheric conditions in the marine and offshore industry are harmful to engineering materials, especially to welded joints, and may cause degradation of their properties. This article presents the results of research on the plasticity of bead-on-plate welds made using two types of seamless, copper plated flux-cored wires. Before welding, spools with wire were stored for 1 month in two distinct locations with different...
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Signature of Oxide-Ion Conduction in Alkaline-Earth-Metal-Doped Y3GaO6
PublicationWe have studied alkaline-earth-metal-doped Y3GaO6 as a new family of oxide-ion conductor. Solid solutions of Y3GaO6 and 2% −Ca2+-, −Sr2+-, and −Ba2+-doped Y3GaO6, i.e., Y(3−0.06)M0.06GaO6−δ (M = Ca2+, Sr2+, and Ba2+), were prepared via a conventional solid-state reaction route. X-ray Rietveld refined diffractograms of all the compositions showed the formation of an orthorhombic structure having the Cmc21 space group. Scanning electron...
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Supramolecular junctions of the PDA tetramers
Open Research DataIn this dataset, a set of polydopamine (PDA) supramolecular junctions with linear and cyclic tetramers in different oxidation states (indolequinone , IQ or dihydroxyindole, DHI) in the scattering region are investigated. Electronic structure of the supramolecular junction with cyclic and linear PDA tetramers, including Electron density maps for the...
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SEM micrographs of VO2 and V6O13 nanostructures
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of VO2 and V6O13 thin films deposited on a silicon substrate. The as-prepared thin films were annealing under a reducing atmosphere (94% Ar, 6% H2) at 600 and 700C for 10h.
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SEM micrographs of NH4VO3 crystals - molar concetration factor after annealing
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of NH4VO3 nano_crystals obtained by the LPE-IonEx method with different morphology after annealing at 400C under argon atmosphere (with a heating rate of 10 C/min).
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SEM micrographs and photos of salivary gland stones
Open Research DataThis dataset contains SEM micrographs and high-resolution photographs taken for salivary gland stones (sialolith) extracted during joint studies between Medical University of Gdansk and Gdansk University of Technology.
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SEM micrographs of ammonium vanadate nanocrystals
Open Research DataThe DataSet contains the electron microscopy (SEM) micrographs of ammonium vanadate nanobelts obtained by the hydrothermal method with different conditions. The results show that the morphology of samples dependent on reaction conditions.
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SEM micrographs of morphology evolution of VO2 and V2O3 thin films obtained at 1000°C
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of VO2 and V2O3 thin films obtained by the sol-gel method. The information about sol synthesis is described in the Journal of Nanomaterials. The thin films were deposited on a silicon and quartz glass substrate and were annealing at 1000°C under an argon atmosphere.
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SEM micrographs of vanadium oxide nanostructures obtained by V2O5 recrystallization at 1000°C
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of vanadium oxide nanostructures on quartz glass and silicon substrates obtained by recrystallization of V2O5 thin films at 1000°C under synthetic air. The thin films were obtained by the sol-gel method. The information about sol synthesis is described in the Journal of Nanomaterials.
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SEM micrographs of vanadium oxide nanostructures obtained by V2O5 recrystallization at 800°C
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of vanadium oxide nanostructures on quartz glass and silicon substrates obtained by recrystallization of V2O5 thin films at 800°C under synthetic air. The thin films were obtained by the sol-gel method. The information about sol synthesis is described in the Journal of Nanomaterials.
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SEM micrographs of morphology evolution of VO2 and V2O3 nanostructures
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of VO2 and V2O3 nanostructures obtained by the sol-gel with different reaction conditions. The information about xerogel powder synthesis is described in the Journal of Nanomaterials. The xerogel powder was annealing under argon atmosphere in the temperature range 400-800C. The...
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SEM micrographs of vanadium oxide nanostructures obtained by V2O5 recrystallization at 1200°C
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of vanadium oxide nanostructures on quartz glass and silicon substrates obtained by recrystallization of V2O5 thin films at 1200°C under synthetic air. The thin films were obtained by the sol-gel method. The information about sol synthesis is described in the Journal of Nanomaterials.
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Production of fuel briquette from solid waste biomass using natural resin as a binder
PublicationAbstract Background: This research aimed to evaluate the use of natural resin as a binder for the production of fuel briquette from solid waste biomass. Methods: Proximate analyses were made for fuel briquette prepared from solid waste biomass using natural resin as a binder in comparison with using starch as a binder. Results: The results for density, percent content of moisture, percent content of volatile matter, percent content...
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Production of fuel briquette from solid waste biomass using natural resin as a binder
PublicationBackground: This research aimed to evaluate the use of natural resin as a binder for the production of fuel briquette from solid waste biomass.Methods: Proximate analyses were made for fuel briquette prepared from solid waste biomass using natural resin as a binder in comparison with using starch as a binder.Results: The results for density, percent content of moisture, percent content of volatile matter, percent...
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Chemistry of the phosphinophosphinidene tBu2P-P, a novel ă-electron ligand.Appl. Organomet. Chem. [online]**2003 vol. 17 [6 December 2002] s. 28-35, 10 rys. bibliogr. 53 poz. Dostępny w Internecie www.interscience.wiley.com Chemia fosfinofosfinidenu tBu2P-P, nowego liganda ă-elektronowego.
PublicationFosfanofosfiniden tBu2P-P w kompleksach z metalami przejściowymi jest z re-guły kompleksowany na sposób hapta-2 i przyjmuje geometrię 1,1-ditertbutyl-difosfenu. W reakcjach z cyklicznymi olefinami związek ten wykazuje właści-wości elektrofilowego singletowego karbenu.
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Structural and electrical properties of titanium-doped yttrium niobate
PublicationIn this work, the influence of the substitution of niobium by titanium in Y3Nb1-xTixO7-δ on the structural and electrical properties is reported. Several experimental techniques, i.e. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-Ray Photoelectron Spectroscopy (XPS) and Electrochemical Impedance Spectroscopy (EIS), were applied to investigate the system Y3Nb1-xTixO7-δ. Titanium in Y3Nb1-xTixO7-δ is an acceptor-type...
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Hydrogen embrittlement of X2CrNiMoCuN25-6-3 super duplex stainless steel welded joints under cathodic protection
PublicationThe effect of cathodic polarization conditions on hydrogen degradation of X2CrNiMoCuN25-6-3 super duplex stainless steel welded joints, obtained using flux cored arc and submerged arc welding methods, was evaluated. Slow strain rate tensile tests of base material and welded specimens, ferrite content measurements, scanning electron microscopy observations, and statistical analysis were performed. It was found that hydrogenation...
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Transparent thin films of Cu-TiO2 with visible light photocatalytic acitivity
PublicationThin films of Cu–TiO2 with a high level of transparency were prepared by a dip-coating procedure on the glass surface. CuCl2 was used as a copper precursor added during sol – gel synthesis of TiO2. The extension of optical absorption into the visible region of as-prepared thin films was indicated by UV/Vis spectroscopy. Only the anatase phase was detected by X-ray di ffraction analysis (XRD). The presence of copper in the structure...
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Hydrogen Production Mechanism in Low-Temperature Methanol Decomposition Catalyzed by Ni3Sn4 Intermetallic Compound: A Combined Operando and Density Functional Theory Investigation
PublicationHydrogen production from methanol decomposition to syngas (H2 + CO) is a promising alternative route for clean energy transition. One major challenge is related to the quest for stable, cost-effective, and selective catalysts operating below 400 °C. We illustrate an investigation of the surface reactivity of a Ni3Sn4 catalyst working at 250 °C, by combining density functional theory, operando X-ray absorption spectroscopy, and high-resolution...
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Sulfate reducing ammonium oxidation (SULFAMMOX) process under anaerobic conditions
PublicationSulfate (SO42-) can be an electron acceptor for ammonium nitrogen (NH4+) oxidation under anaerobic conditions. The process is known as sulfammox and can be a viable alternative to conventional, nitrite (NO2-) dependent, anammox. Two bacterial species, including Bacillus Benzoevorans and Brocadia Anammoxoglobus Sulfate, can perform that process. With sulfammox, an economically inefficient pre-nitration step (due to aeration) is...
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Andrzej Okuniewski dr inż.
PeopleEducation 2010-2014: Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of TechnologyPhD in chemical sciences (chemical sciences - chemistry, inorganic chemistry) 2009-2010: Faculty of Chemistry, Gdańsk University of TechnologyMaster of Chemistry (applied chemistry) 2005-2009: Faculty of Chemistry, Gdańsk University of Technologychemical engineer (applied chemistry) 2002-2005: II High School Władysław Pniewski...
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XPS data of deuterium and hydrogen grown boron-doped diamond
Open Research DataThe high-resolution C1s X-ray absorption spectra of BDD@H and BDD@D samples were measured using the facilities of the HE-SGM beamline (HE-SGM) at the BESSY II synchrotron radiation source of Helmholtz–Zentrum Berlin (HZB).[90] The measurements were carried out under ultra-high vacuum conditions: P ≈ 2×10−9 Torr at T = 300 K. The NEXAFS spectra were...
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SEM micrographs of NH4VO3 crystals - molar concetration factor
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of NH4VO3 nano_crystals obtained by the LPE-IonEx method. The SEM images clearly show that the morphology of the end product can be nicely tuned by changing the molar concentration of ammonium salt in the solvent.
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SEM micrographs of morphology evolution of VO2 and V2O3 thin films obtained at 700°C
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of VO2 and V2O3 thin films obtained by the sol-gel method. The information about sol synthesis is described in the Journal of Nanomaterials. The thin films with different thicknesses (3-9 AsP layers) were deposited on a silicon substrate and were annealing at 700°C under an argon...
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SEM micrographs of morphology evolution of VO2 and V2O3 thin films obtained at 1000°C dependent on film thickness
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of VO2 and V2O3 thin films obtained by the sol-gel method. The information about sol synthesis is described in the Journal of Nanomaterials. The thin films with different thicknesses (2-3 AsP layers) were deposited on a silicon substrate and were annealing at 1000°C under an argon...
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SEM micrographs of morphology evolution of VO2 and V2O3 thin films obtained at 500°C
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of VO2 and V2O3 thin films obtained by the sol-gel method. The information about sol synthesis is described in the Journal of Nanomaterials. The thin films with different thicknesses (3-9 AsP layers) were deposited on a silicon substrate and were annealing at 500°C under an argon...
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Perovskite-type KTaO3–reduced graphene oxide hybrid with improved visible light photocatalytic activity
PublicationNovel rGO–KTaO3 composites with various graphene content were successfully synthesized using a facile solvothermal method which allowed both the reduction of graphene oxide and loading of KTaO3 nanocubes on the graphene sheets. The as-prepared photocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDX), Fourier...
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Investigation of volatile low molecular weight compounds formed during continuous reclaiming of ground tire rubber
PublicationGround tire rubber was thermo-mechanically reclaimed at different temperature conditions (80, 120, 160 °C) using a co-rotating twin screw extruder. The progress of ground tire rubber reclaiming was evaluated with specific mechanical energy, sol fraction and thermogravimetric analysis. Volatile organic compounds (VOCs) including volatile sulfur compounds (VCSs) released from ground tire rubber and ground tire rubber after reclaiming...
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Scattering of electrons by a 1,2-butadiene (C4H6) molecule: measurements and calculations
PublicationWe present the results of experimental and theoretical study on electron collisions with a 1,2-butadiene (H2C=C=CHCH3) molecule. Absolute grand-total cross sections (TCSs) were measured using a linear electron-transmission method for collision energies in the 0.5–300 eV range. Two distinct features in the TCS energy curve were detected: a narrow peak located at 2.3 eV and a broad enhancement centered around 9 eV. We attributed...
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Scanning Electron Microscopy Facility
Laboratories -
Ecological and Health Effects of Lubricant Oils Emitted into the Environment
PublicationLubricating oils used in machines with an open cutting system, such as a saw or harvester, are applied in forest areas, gardening, in the household, and in urban greenery. During the operation of the device with an open cutting system, the lubricating oil is emitted into the environment. Therefore, the use of an oil base and refining additives of petroleum origin in the content of lubricants is associated with a negative impact...
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Fermentative Conversion of Two-Step Pre-Treated Lignocellulosic Biomass to Hydrogen
PublicationFermentative hydrogen production via dark fermentation with the application of lignocellulosic biomass requires a multistep pre-treatment procedure, due to the complexed structure of the raw material. Hence, the comparison of the hydrogen productivity potential of different lignocellulosic materials (LCMs) in relation to the lignocellulosic biomass composition is often considered as an interesting field of research. In this study,...
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Preparation and characterization of natural rubber composites highly filled with brewers' spent grain/ground tire rubber hybrid reinforcement
PublicationBrewers' spent grain (BSG) and ground tire rubber (GTR) were applied as low-cost hybrid reinforcement natural rubber (NR). The impact of BSG/GTR ratio (in range: 100/0, 75/25, 50/50, 25/75 and 0/100 phr) on processing and performance properties of highly filled natural rubber composites was evaluated by oscillating disc rheometer, Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy,...
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Rapid method for the determination of organochlorine pesticides and PCBs in fish muscle samples by microwave-assisted extraction and analysis of extracts by GC-ECD
PublicationA procedure for the multiresidue determination of organochlorine pesticides and polychlorinated biphenyls in fish muscle samples has been developed. The method is based on the microwave-assisted extraction (MAE) of food samples from an acetonitrile-water (95 + 5, v/v) mixture followed by SPE cleanup of the extracts and analysis by GC with an electron capture detector. MAE operational parameters, such as the extraction solvent,...
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Environmentally Friendly Fabrication of High-Efficient Fe-ZnO/Citric Acid-Modified Cellulose Composite and the Enhancement of Photocatalytic Activity in the Presence of H2O2
PublicationIn the present study, a novel Fe-ZnO/citric acid-modified cellulose composite (x%Fe-ZnOy% CAC) was synthesized using an environmentally friendly hydrothermal method. The obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV−vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectroscopy (FTIR), nitrogen physisorption, and electrochemical and photocurrent density...
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Preparation, morphology and properties of natural rubber composites filled with untreated short jute fibres
PublicationGreen composites were obtained by incorporation of short jute fibres in natural rubber matrix using a laboratory two-roll mill. The influence of untreated fibre content (1, 2.5, 5, 7.5 and 10 phr) on the mechanical properties, dynamic mechanical properties, swelling properties was examined. The behaviour of prepared green composites under cyclic compression was also investigated. Fibre dispersion in rubber matrix was studied by...
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A comparative study on selective properties of Kraft lignin–natural rubber composites containing different plasticizers
PublicationEffect of plasticizer type on the kraft lignin–nat- ural rubber composite microstructure and selected proper- ties was determined. The composites were prepared with addition of a commonly used naphthenic oil plasticizer to study the decomposition product of polyurethane (glyc- erolysate) and its characteristics. Kraft lignin powder was incorporated into the natural rubber matrix in amounts of 10 and 40 parts per 100 parts of natural...
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Rotational molding of polylactide (PLA) composites filled with copper slag as a waste filler from metallurgical industry
PublicationThe research work carried out so far indicates the ever wider possibilities and demand for shaping composite products in the rotational molding technology. This trend was the main reason to use waste-based filler from the metallurgical process as a filler for manufacturing polylactide (PLA)-based remolded composites. Copper slag (CS) was introduced in the single-step processing method to PLA matrix at 5, 10, 20, and 35 wt%. The...
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Characterization methods of nickel nano-particles obtained by the ex-solution process on the surface of Pr, Ni-doped SrTiO3 perovskite ceramics
PublicationIn this paper, a novel electrode material based on Pr, Ni co-doped strontium titanate ( Sr0.7Pr0.3)xTi1−yNiyO3 with constant amount of 30% praseodymium dopant, different amount of nickel (y = 0.06 and y = 0.10) and additional nonstoichiometry in Sr-site (x = 1; x = 0.9 and x = 0.8) was investigated as fuel electrode for SOEC devices. A porous ceramics were prepared by solid-state reaction method. X-ray diffraction measurements...
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Electrical properties of A-site Ca-doped LaNb1-xAsxO4-δ ceramics
PublicationThe electrical properties of A-site Ca-doped LaNbO4 with the addition of As in the B-site, have been investigated. Total, grain- and specific grain boundary electric conductivities in different oxygen partial pressure, and water vapour partial pressure were determined. Additional conductivity measurements were performed in nitrogen, to suppress the possible p-type conductivity, focusing on protonic conductivity. The maximum measured...
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SEM micrographs of morphology evolution of V2O5 thin films on quartz glass
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of V2O5 thin films deposited on a quartz glass substrate. The as-prepared thin films were annealing under an oxidizing atmosphere in the temperature range 200-600C. The results show that the morphology of the films dependent on the annealing temperature.
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SEM micrographs of morphology evolution of V2O3 nanostructures
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of V2O3 nanostructures obtained by the sol-gel with different reaction conditions. The xerogel powder was annealing under a reducing atmosphere (94% Ar, 6% H2) in the temperature range 350-700C. The results show that the morphology dependent on the annealing temperature.
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SEM micrographs of the V2O5 coatings after thermal treatment under reducing atmosphere
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of V2O5 coatings on the silicon substrate after thermal treatment under a reducing atmosphere. Thin films were annealed at 600C and 700C for 10 under a reducing atmosphere (94% Ar, 6% H2).
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SEM micrographs of V2O5 thin film morphology dependent on substrate types
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of V2O5 thin film morphology dependent on substrate types. The as-prepared thin films were deposited on alumina, zirconium, zirconium oxide and metallic vanadium substrate, then was annealing under an oxidizing atmosphere at 600C for 10h. The results show that the morphology of...
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SEM micrographs of morphology evolution of V2O5 thin films on silicon substrate
Open Research DataThe DataSet contains the scanning electron microscopy (SEM) micrographs of V2O5 thin films deposited on a silicon substrate. The as-prepared thin films were annealing under an oxidizing atmosphere in the temperature range 250-600C. The results show that the morphology of the films dependent on the annealing temperature.
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Monika Arczyńska dr inż. arch.
PeopleArchitect and researcher with over 10 years of international experience in cultural projects. She has been working on the designs of Grand Egyptian Museum in Cairo, Palestinian Museum in East Bank, Giant’s Causeway Visitor Centre and National Centre for Contemporary Art in Moscow (with Heneghan Peng Architects). As a founder of A2P2 architecture & planning she runs architecture department of the company. In 2018 together with...
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Interaction of 4-nitrothiophenol with low energy electrons: Implications for plasmon mediated reactions
PublicationThe reduction of 4-nitrothiophenol (NTP) to 4-4′-dimercaptoazobenzene (DMAB) on laser illuminated noble metal nanoparticles is one of the most widely studied plasmon mediated reactions. The reaction is most likely triggered by a transfer of low energy electrons from the nanoparticle to the adsorbed molecules. Besides the formation of DMAB, dissociative side reactions of NTP have also been observed. Here, we present a crossed electron-molecular...
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Qualitative and Quantitative Analysis of Selected Tonic Waters by Potentiometric Taste Sensor With All-Solid-State Electrodes
PublicationTaste sensor with five all-solid-state electrodes (ASSE) III (third version) was used for qualitative and quantitative analysis of selected tonic waters (J.Gasco, Kinley, Jurajski, Jurajski with citrus flavor, Carrefour, Schweppes Indian Tonic, and Schweppes Bitter Lemon). The results obtained by this taste sensor analyzed with principal component analysis, agglomerative hierarchical clustering methods show that this sensor can...
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In Vitro Studies on the Relationship Between the Antioxidant Activities of Some Berry Extracts and Their Binding Properties to Serum Albumin
PublicationThe aim of this study was to investigate the possibility to use the bioactive components from cape gooseberry (Physalis peruviana), blueberry (Vaccinium corymbosum), and cranberry (Vaccinium macrocarpon) extracts as a novel source against oxidation in food supplementation. The quantitative analysis of bioactive compounds (polyphenols, flavonoids, flavanols, carotenoids, and chlorophyll) was based on radical scavenging spectrophometric assays...