Materials Literature
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Self-passivating tungsten-based alloys are an attractive material for application in future fusion reactors, because they combine the favourable properties of tungsten with an enhanced passive safety in the case of a loss of coolant accident. Powder metallurgical technologies have been used to prepare binary or ternar…
A 1.5 A normally-off GaN transistor for power applications in p-type GaN gate technology with a modified epitaxial concept is presented. A higher threshold voltage is achieved while keeping the on-state resistance low by using an AlGaN buffer instead of a GaN buffer. Additionally, the AlGaN buffer acts as a back-barri…
Summary According to Indian Systems of Medicine, Crossandra infundibuliformis (L.) belonging to the family (Acanthaceae), were used for treating male sexual disorders since ancient times. Aim of this study to evaluate the phytochemical constituents and the aphrodisiac potential of the petroleum ether extract of leaves…
The hypervelocity impact characteristics in fused silica glass, which is used for the outermost pane of the windshield as the critical part of the thermal protection system of spacecraft, were studied by 37 impact experiments with different millimeter diameter projectiles up to the velocity of 7 km/s launched by two s…
A method for creating a database of dispersive refractive indices of thin film materials is outlined. Refractive indices for the most widely used metal oxide films produced under different deposition conditions are presented.
Harmful elements (Pb, Se, Cd, etc.) in the soil samples were measured by X-ray fluorescence (XRF) method. We investigated the influence of the thickness of soil layer, the grain size of soils, and the water content in soils on XRF intensity. Since high-energy XRF such as Cd K � was detected in deep inside of soils, a…
The paper presents examination results of the effect of four hardening methods on structure of linking bridges in sandmixes containing hydrated sodium silicate. Test pieces prepared of the moulding sands containing 2.5 % of a binder with molar module between 2.4 and 2.6 were hardened with carbon dioxide, dried traditi…
Graphite is used as a solid moderator in many fission nuclear reactors such as Magnox, Advanced Gas-cooled Reactor (AGR) and RBMK reactors as well as the new fourth generation Very High Temperature Reactor (VHTR) designs. The role of graphite is to slow down neutrons emitted by fission, thus enhance their probabilitie…
Purpose: This article provides an overview of the daylighting system using existing and advanced submicron technology for buildings. The approaches of movable and fixed sunlight guiding system for saving the energy of artificial lighting will be reviewed. The major part is devoted to the sunlight guide panel / film ba…
Unmodified Na-montmorillonite (MMT) was swollen in a polyol/water mixture using an ultrasound technique. Polyurethane (PU) foam nanocomposites were formed via reaction of these polyol/water/Na-MMT mixtures with toluene diisocyanate (TDI). Forced-adiabatic attenuated total reflectance FTIR spectroscopy was used to dete…
In this study, we explored the effects of ion beam (IB) bombardment on the orientation of liquid crystal (LC) molecules on surfaces. Increasing the IB exposure time resulted in improved LC alignment characteristics. Through X-ray photoelectron spectroscopy analysis, it was also confirmed that IB irradiation caused Ta…
A comparative study was performed of the adsorption kinetics of hemoglobin onto four silicate adsorbents that differed in parameters of porous structure: industrial silochrome, and three silicates obtained by template synthesis. The existence of a reversible stage of the process preceding irreversible protein binding…
Cuprous oxide thin films were successfully grown on indium tin oxide (ITO) coated glass by sol-gel spin coating using diethanolamine (DEA) as a solubility agent. The films were annealed at 350 °C in 5 % H2 + 95 % N2 atmosphere. The films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM)…
We report on a method to prepare Pt electrodes with homogeneously dispersed Pt nanoparticles on fluorine-doped tin oxide substrates by adding an organic additive, hydroxypropyl cellulose (HPC), in the Pt precursor solution for thermal decomposition on the substrates. The Pt electrodes prepared with various amounts of…
We have developed a Raman microspectroscopy system optimised for studying supported lipid bilayers (SLB). This system combines the benefits of Raman spectroscopy with the high spatial resolution of confocal microscopy. Furthermore, the additional incorporation of an atomic force microscope (AFM) makes it possible to d…
TiO2 solar cells were fabricated consisting TiO2 layer, TiO2 nanocomposite layers, electrolyte polymer and counter electrode layer. It was found that TiO2 nanocomposite layer that contains metal (Zn) contact could be conductive and make better charge transfer than pure TiO2. Conversion efficiency 1.0% was achieved usi…
We study a method for nondestructive testing of laminated strips of a nonlinear magnetic material. Based on local measurements of the magnetic induction at the surface, we are able to reconstruct the proper position of defects inside the material, by solving an inverse problem. This inverse problem is solved by minimi…
This work presents an influence of cooling rate on crystallization process, structure and mechanical properties of MCMgAl6Zn1 castmagnesium alloy. The experiments were performed using the novel Universal Metallurgical Simulator and Analyzer Platform. Theapparatus enabled recording the temperature during refrigerate ma…
Mn(V) porphyrins featuring an oxo ligand trans to a hydroxo group offer a unique opportunity to compare the hydrogen atom abstraction ability of a protonated vs. a non-protonated high-valent oxo metal species, providing insight into the issue of oxo ligand protonation in Fe-containing biologically high-valent centers.…
BACKGROUND: Disulfide-linked oligodeoxyribonucleotide (ODN) liposomes were formulated and evaluated for the delivery of antisense ODN G3139 in KB human oral carcinoma cells. MATERIALS AND METHODS: Liposomes composed of 1,2-di-(9Z-octadecenoyl)-3-trimethylammo-nium-propane (DOTAP)/egg phosphatidylcholine/alpha-tocopher…