Materials Literature
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Due to fast hydrolysis of AlN when in contact with water, AlN based ceramics are processed in organic solvents, which are volatile, expensive, harmful to the health and environment. The present work intends to protect AlN powder against hydrolysis in order to enable aqueous processing of AlN based ceramics. A commerci…
Garnet solid solutions have been synthesized across the skiagite-Fe-knorringite (Fe 3 2+ Fe 2 3+ Si 3 O 12 - Fe 3 Cr 2 Si 3 O 12 ) binary join. Such compositions reflect a simple Cr-Fe 3+ exchange on the octahedral sites, with Fe 2+ occupying the adjacent dodecahedral sites. Solid solution is complete across the join…
The self-assembling peptide, RAD16-II (Ac-RARADADARARADADA-NH2), has been shown to have many great applications in nanotechnology and tissue engineering. But few studies have been carried out to study the application of self-assembling peptides as a drug carrier. We used hydrophobic drug pyrene as a model and liposome…
Abstract Application of epoxidized and hydroxylated natural oils as a new group of environmentally friendly and renewable raw materials for the synthesis of high molar mass epoxy resins is described. Selected vegetable oils were first oxidized and next reacted with mono and diethylene glycols. Obtained epoxidized soyb…
Hexagonal and preferentially oriented three-dimensional ZnO tripods have been grown on p-Si [100] substrates by a simple vapor-solid technique without using any catalysts. The tripodal-core growth route involves the formation of a hexagonal disk with [0002] larger surfaces. The tripods show irreversible shape transfor…
Ti K-edge x-ray absorption near-edge spectroscopy (XANES) and Raman scattering were used to study the solid solution effects on the structural and vibrational properties of Pb1−xBaxZr0.65Ti0.35O3 with 0.0<x<0.40. Compared with x-ray diffraction techniques, which indicates that the average crystal symmetr…
Rhodospirillum rubrum is among the bacteria that can assimilate acetate in the absence of isocitrate lyase, the key enzyme of glyoxylate shunt. Previously we have suggested the functioning of a new anaplerotic cycle of acetate assimilation in this bacterium: citramalate cycle, where acetyl-CoA is oxidized to glyoxylat…
Abstract Micron‐sized gold nanosheets were produced through thermolysis of a mixture composed of 1‐octa‐decanylimidazole (C 18 ‐im) and HAuCl 4 in a molar ratio of 4:1 at 200 °C for 1 h. Effects of the molar ratio of [ 18 ‐im]/[HAuCl 4 ], the reaction temperature, and the N‐alkylimidazole chain length were studied. Ad…
An improved hydrogen adsorption capacity of 0.5–0.6 wt% was obtained at room temperature and 10.0 MPa pressure for commercial MWNT sample by γ-ray irradiation, compared with 0.33 wt% of pristine MWNTs. The irradiation-induced defects in structure, which is favorable for hydrogen adsorption, were characterized by ESR s…
We studied the transport and magnetic properties of low-doped manganite films after different oxygenation processes. The oxygen content was adjusted by postdeposition annealing at different oxygen pressures and annealing times. For all the samples we observed an increase in the Curie temperature and the remnant magnet…
The surface tension coefficients of chalcogenide glasses are estimated. It is demonstrated that, to a first approximation, the results of the existing techniques for estimating the surface tension coefficients of chalcogenide glasses are in satisfactory agreement. The energies of formation of fluctuation microvoids in…
This paper focuses on the synthesis of gold nanorods by a seeding growth approach in the presence of cetylthrimethylammonium bromide as a weak reducing agent. The pH value of the solution is an important factor in the formation and control the morphology of gold nanorods. In the pH-dependent range from pH 3.3 to pH 2.…
The multibubble sonoluminescence spectra of argon-saturated aqueous salt solutions of alkaline and alkaline earth metals exhibit an intense enhancement of atomic emission with respect to continuum emission with an increase in the hydrostatic pressure and decrease in the solution temperature. It is suggested that ion r…
We have designed and fabricated a vacuum-insulated thermostat capable of measuring the thermoelectric properties of thin films from room temperature to 850 K. High speed Seebeck voltage transients are resolved to 200 ns with 63 dB dynamic range in order to directly measure thermoelectric device figure of merit. In-pla…
Abstract In order to define the ability of magnetic elements M = Mn, Fe, Co to stabilise clathrate structures, alloys of the Ba – M – Ge system were investigated in the as-cast state and after annealing at 700°C and 800°C by means of X-ray powder diffraction, light optical and electron-probe microanalysis. Temperature…
Three approaches to the synthesis of reduced derivatives of tetraazaporphine such as tetraazachlorin, tetraazabacteriochlorin, and tetraazaisobacteriochlorin are reviewed. The first synthesis of alkyl-substituted tetraazachlorins was achieved by the catalytic hydrogenation of magnesium complexes of tetraazaporphines.…
The 3-D polycrystal magnetic field analysis method by means of coordinate transformation is proposed. The local coordinates are fixed in each crystal grain and the global coordinates are defined in the polycrystal steel. Though it is assumed that each crystal grain has the same magnetized characteristics as those of a…
The present study concerns development of a thin and adherent oxide film on the surface of Ti–6Al–4V by thermal oxidation and evaluation of its electrochemical properties for the possibility of its end use as coating on bio-implant. Thermal oxidation was carried out over a range of temperatures from 400 to 600°C and t…
Abstract TGA experiments on the catalytic cracking of methane and methane diluted with hydrogen over a 5 wt% Ni/γ‐alumina catalyst at 500°C and 1 and 10 bar are described. Carbon deposition on the catalyst, as expressed in specific weight of carbon, varies with time. Eventually, the deposition stops because of deactiv…
This work presents systems analysis results of an integrated gasification fuel cell (IGFC) combined cycle with carbon capture. The study assumes the use of an atmospheric pressure solid oxide fuel cell. The efficiency, carbon capture potential, and water consumption rates are evaluated and compared to another advanced…