Materials Literature
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A one‐chamber solid oxide fuel cell (working in a methane‐air mixture) with yttria‐stabilized zirconia (YSZ) electrolyte was modified by adding oxide to the anode (Pt) and cathode (Au). It was determined that the addition of MnO 2 to both electrodes significantly improved the cell discharge characteristics. The short‐…
Tyrosine aminotransferase catalyzes transamination for both dicarboxylic and aromatic amino-acid substrates. The substrate-free Escherichia coli tyrosine aminotransferase (eTAT) bound with the cofactor pyridoxal 5'-phosphate (PLP) was crystallized in the trigonal space group P3(2). A low-resolution crystal structure o…
Oil palm empty fruit bunch (EFB)-based composites were produced using different types of thermoplastic as matrices. The composites were produced by using an internal mixer. The mechanical and water absorption properties of composites were investigated. Overall, the incorporation of EFB into the polymer matrix has resu…
The first series of achiral non symmetric banana-shaped mesogens has been synthesized. The mesophases observed for these compounds depend on the whole number of carbons in the alkyl chains (N). They were investigated by optical microscopy, calorimetry, X-ray diffraction experiments and electro-optical measurements. Fo…
Article Degradation of Cellulosic Materials under the Alkaline Conditions of a Cementitious Repository for Low- and Intermediate Level Radioactive Waste. Part III: Effect of Degradation Products on the Sorption of Radionuclides on Feldspar was published on August 1, 1999 in the journal Radiochimica Acta (volume 86, is…
Thin films of Bi2Se3 have been prepared by vacuum deposition technique onto well cleaned glass and freshly cleaved KBr substrates. The film thicknesses are measured by Tolansky technique. The capacitance and dielectric constant have been measured from 303 K to 383 K in the frequency range of 10 kHz to 10 MHz. The a.c.…
Abstract Partial stabilization of Fe(II) in chemically reduced smectite, which normally readily undergoes reoxidation in air, was achieved. The purpose of this study was to determine if Fe(II) can be stabilized in reduced smectites by Li fixation upon heating. More than 80% of total Fe in ferruginous smectite SWa-1 wa…
The model presented considers surface kinetics processes, such as adsorption/desorption of hydrocarbon radicals, thermal dehydrogenation, evaporation, and carbon insertion into silicon, together with the bulk diffusion equation. The calculations performed show that surface protrusions present preferential locations fo…
Abstract This paper deals with the application of full group theoretical methods to the elucidation of the symmetry and structure of an incommensurate phase. The analysis shows that the full symmetry and structure of the incommensurate phase can be determined unequivocably where certain minimal symmetry data are avail…
High operating pressure, about 12–25 atm, is required to develop a highly efficient molten carbonate fuel cell (MCFC) plant system combined with a gas turbine or coal gasifier system. Operation at high pressure, over 10 atm, will accelerate dissolution of the NiO cathode and shorten cell life. Therefore, economical ap…
Infrared (IR) reflectivity and submillimeter transmission measurements of ferroelectric and paraelectric LaBGeO5 single crystals were carried out in the temperature range of 300 to 870 K. From the classical oscillator fit to the spectra, the complex dielectric function in the range of 4 to 3000 cm—1 was calculated. In…
ABSTRACT The effects of oil droplet size and agar concentration on gel strength and microstructure of emulsion gels were investigated by compression test and cryoscanning electron microscope (Cryo‐SEM). At all agar concentrations, the compressive stress values of emulsion gels were lower than those of the oil‐free gel…
The dynamical behavior of lyotropic nematic liquid crystals doped with ionic and surfacted magnetic fluids (ferronematics) is studied using a linear optical technique. The response of these mesophases to a combination of a static and a pulsed magnetic field is investigated by measuring the relaxation times as a functi…
The “knitting pattern” morphology was obtained via blending of two polystyrene-block-polybutadiene-block-poly(methyl methacrylate) triblock copolymers. This demonstrates that blending of block copolymers is a useful way to design periodic superstructures by taking advantage of the self-assembling nature of microphase…
Absorption and MCD spectra of the two-electron oxidized lutetium phthalocyanine trimer [( Pc ) Lu ( CRPc ) Lu ( Pc )] 2+ ( Pc ≡ phthalocyanine ; CRPc ≡ 15- crown -5- substituted Pc ) as well as the MCD spectrum of the oxidized lutetium Pc dimer [ Lu ( Pc ) 2 ] + are reported. These ‘two-electron-deficient’ Pc stacks s…
A systematic study, devoted to analyzing the effect of various parameters in the synthesis of furanic aliphatic polyamide by interfacial polycondensation of 2,2′-bis(5-chloroformyl 2-furyl)propane with hexamethylene diamine, is described. The effects of the organic solvent, temperature and phase transfer catalyst type…
The effect of ? radiation on the electrical conductivity of polyaniline in the reduced, undoped and doped states has been studied. A model based on the oxidation of the polymeric chain combined with radiolysis of the absorbed water molecule has been proposed to explain the radiation-induced effects in this polymer. Th…
Magnetic phase transitions in Fe72Pt28 Invar compound studied by high-pressure X-ray magnetic circular dichroism and X-ray diffraction, S. Odin, F. Baudelet, Ch. Giorgetti, E. Dartyge, J. P. Itié, A. Polian, J. C. Chervin, S. Pizzini, A. Fontaine, J. P. Kappler
Technical Briefs On the Wave Diffusion and Parallel Nonequilibrium Heat Conduction M. Honner, M. Honner Mechanical Engineering Research, Skoda Vyzkum s.r.o., Tylova 57, CZ 31600 Plzen, Czech Republic e-mail: mhonner@vyz.ln.skoda.cz. Search for other works by this author on: This Site PubMed Google Scholar J. Kunes J.…
The Schwinger variational iterative method and the distorted-wave approximation are combined to study elastic electron scattering by ${\mathrm{O}}_{2}$ for incident energies ranging from 5 to 500 eV. Differential, integral, and momentum transfer cross sections as well as polarization fractions are reported. A complex…