Materials Literature
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The blue and green terbium luminescence excitation spectra (5–15 eV) at a temperature of 9 or 300 K have been measured for a set of CaSO4 : Tb3+ phosphors with calcium and terbium ions characterized by fundamental features, which were synthesized by the solid-state reaction method with variations in the composition of…
The objective was to identify the main factors and interactions influencing the fibre diameter in the production of electrospun cellulose acetate (CA) webs. A systematic parameter study was completed for producing electrospun CA fibres that were substantially free of bead defects and the effect of different process pa…
In a dry foam, soap films meet by three in the liquid microchannels, called Plateau borders, which contain most of the liquid of the foam. We investigated here the transverse vibration of a single Plateau border isolated on a rigid frame. We measured and we computed numerically and analytically the propagation of a tr…
Statistical algorithms of modeling the processes of radiation cascade transport in compound objects by the use of heterogeneous computers have been developed. Such processes include the generation of electron fluxes of gamma-quanta, bremsstrahlung of electrons, and radiation electronic emission. An economic plan for r…
The morphology of stacked coronene molecules encapsulated in a single-walled carbon nanotube (SWCNT) is investigated using atomistic simulation. First, the minimum energy configuration of coronene molecules in a SWCNT is sought by means of conjugate gradient (CG) minimization. Secondly, encapsulation of coronene molec…
Summary Zinc Oxide (ZnO) nanoparticles were synthesized by chemical precipitation method. Particle size as calculated from X‐ray Diffraction (XRD) and Transmission Electron Microscopy (TEM) were found to be 18 ± 2 nm. Polystyrene (PS)‐ZnO nanocomposite membrane of thickness 30 μm were prepared by solution cast method…
Проведен анализ современного состояния технологических решений в области радиопрозрачных стеклокерамических материалов на основе алюмосиликатных систем. Рассмотрено развитие методов получения стеклокерамики от классической стекольной технологии к керамической. Показано, что осуществление направленной контролируемой кр…
This paper presents the strain field analysis of a woven hemp composite. Two different stacking sequences were tested: [0/90] 7 and [±45] 7 . Tensile tests were coupled with a digital image correlation method in order to measure in-plane longitudinal, transverse and shear strain fields. Strong heterogeneities were obs…
The performance of Solid Oxide Fuel Cell (SOFC) electrodes is determined both by their porous microstructure and the intrinsic properties of their component materials. This thesis details the development of two characterisation tools for analysis of mass and charge transport processes in SOFC electrode materials. Firs…
Eu 3+ , Pr 3+ , or Gd 3+ codoped Ce:YAG single crystals were grown by using the Czochralski method. The photoluminescence (PL) emission and excitation spectra and transmittance were measured and investigated. The additional red-emitting bands were observed in the PL emission spectra of Eu,Ce:YAG and Pr,Ce:YAG single c…
The corrosion behaviour of mild steel immersed in 0.5 M HCl in the absence and presence of 4-hydroxy- N '-[(1 E , 2 E )-3-phenylprop-2-en-1-ylidene] benzohydrazide (HPB) was evaluated using Tafel polarization and electrochemical impedance spectroscopy techniques. The effect of inhibitor concentration and temperature o…
Regularities of the formation of silver nanoparticles with oligostyrylcarboxylate ligands during the one-step reduction of silver oligostyrylcarboxylates with triethylamine are studied via UV–Vis and IR spectroscopy. It is shown that the synthesis of silver nanoparticles occurs in a system with micellar organized mole…
The magnetocapacitance effects of MnZn ferrites with different initial permeabilities have been studied systematically. Both intrinsic effect associated with magnetoelectric coupling and extrinsic effect, which means the combined contribution of magnetoresistance and the Maxwell-Wagner effect, have been observed simul…
The crystal structure of the hydrated analog of the mineral rastsvetaevite (tentatively called “hydrorastsvetaevite”), which was found by A.P. Khomyakov in ultraagpaitic pegmatites at the Rasvumchorr Mountain of the Khibiny alkaline massif (Kola Peninsula), has been determined by single crystal X-ray diffraction. The…
PURPOSE: Biodegradable nanoparticles (NPs) composed of poly(D, L-lactide-co-glycolide) (PLGA) have attracted considerable attention as delivery systems of drugs and antioxidative compounds, such as β-carotene (BC). Intravenous (IV) administration of BC-containing PLGA-NPs (BC-PLGA-NPs) coated with polysorbate 80 (PS80…
The axonal translocation of two commonly used nanoparticles in medicine, namely CeO2 and SiO2, is investigated. The study was conducted on frog sciatic nerve fibers in an ex vivo preparation. Nanoparticles were applied at the proximal end of the excised nerve. A nerve stimulation protocol was followed for over 35 hour…
Results on investigations of the PZT type ceramics with the following chemical composition: Pb0.94Sr0.06(Zr0.50 Ti0.50)0.99 Cr0.01O3 (PSZTC) which belongs to a group of multicomponent ceramic materials obtained on basis of the PZT type solid solution, are presented in this work. Ceramics PSZTC was obtained by a free s…
The effects of Mg particles in a Mg-rich epoxy primer (MRP) for AZ91D alloy was studied with electrochemical techniques. As the Mg content in the MRP increases, the electrochemical activity of the coating increases and the AZ91D alloy substrate is protected cathodically by the coating to some extent. However, the pore…
In this research, we are studying structural and optical properties of film (PVA doped with CuO and FeCl3).The(CuO)with concentration (7%),and (FeCl3) with different concentrations of FeCl3 (3, 7, and 9) %,preparing by casting method with thickness (25±5) µm,thestructure characterized by using (XRD).The investigation…
This paper presents the design of a Hilbert fractal antenna for the purpose of detecting and classifying different partial discharge (PD) types in an oil-paper insulated system. Three common types of PDs are considered for the multi-class classification problem, namely; PD from a sharp point to ground plane, surface d…