Materials Literature
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Some different oxygen content La4Ni3O10+δ (δ=0.02,0.12,−0.22) compounds were prepared in order to study the influence of Ni3+ content on the electronic properties. A metal–metal transition was detected at 140 K for the as-prepared (La4Ni3O10.02) and reduced (La4Ni3O9.78) compounds. From the electrical conductivity, Se…
The effect of a variety of doping additives on the hydration resistance of calcined materials in the MgO–CaO system was investigated. Samples were prepared from lightly calcined flotation magnesite that was mixed with dolomite, as well as from analytically pure CaO and MgO; then, the samples were doped with additives…
The crystallization of Zr41Ti14Cu12Ni10Be23 (Vit 1) melts during constant heating is investigated. (Vit 1) melts are cooled with different rates into the amorphous state and the crystallization temperature upon subsequent heating is studied. In addition, Vit 1 melts are cooled using a constant rate to different temper…
A tank shield model of a transformer which is proposed by the Investigation Committee of IEE of Japan is analyzed. This is a model having the constraint that the maximum eddy current density should be less than a specified value. The automatic 3D mesh generation technique for hexahedral element is investigated for the…
This paper presents a three-dimensional coupled approach for transient simulation of electromagnetic devices. The approach is based on the A-V-A formulation, in which the eddy current field and the electric circuit equations are solved simultaneously. The Newton-Raphson procedure has been used to take the magnetic non…
Polypropylene is increasingly being used for the thermoforming of food packaging. Compared with amorphous materials, such as polystyrene, it is much more difficult to process and within the industry it is generally poorly understood. In the present study the effects of pigments and nucleating agent on the crystallisat…
A series of back-coated cotton fabrics comprising varying molar ratios of chlorine, bromine and antimony has been studied using a simulated match ignition test, LOI and thermal analysis (TGA and DTA). Results show that the presence of chlorine alone and in combination with bro mine increases LOI and carbonaceous char…
A precise way of estimating the packing coefficient, i.e. the ratio between the protein and unit-cell volume, or solvent content in protein crystals is given. At present, the solvent content is not given for most proteins in the Protein Data Bank and in many cases where it is given the values are dubious. The mean den…
In this work the surface electronic and structural properties of about 150 nm thick WO3 films, deposited in high vacuum by thermal evaporation onto Si substrates, have been studied in ultrahigh vacuum (UHV) by means of x-ray photoemission spectroscopy (XPS) and scanning tunneling microscopy (STM)/spectroscopy. After d…
Sintering of magnesium aluminate spinel of the MgO‐excess, stoichiometric, and Al 2 O 3 ‐excess compositions has been investigated under vacuum and in air for the effect of low oxygen partial pressures. Densification enhancement of the surface layer is due to MgO evaporation which generates oxygen vacancies in the hos…
We report magnetization measurements in the Ln(Mn1−xCox)O3+λ (Ln=Eu, Nd; 0⩽x<1) and Y(Mn1−xCox)O3 (0.35⩽x⩽0.5) perovskites as a function of temperature and magnetic field. Compositions in the range of 0.35⩽x⩽0.8 (Ln=Eu), 0.4⩽x⩽0.6 (Ln=Nd), and 0.35⩽x⩽0.45 (Ln=Y) exhibit metamagnetic behavior associated with a t…
Investigations have been carried out to study the effect of processing parameters, namely holding time, temperature, and pressure, on the consolidation quality and mechanical properties of GF/PP commingled yam based composites. The consolidation quality has been defined in terms of the void content in the laminate, an…
Abstract In this paper, I review the structural and physical properties of the gold mixed-valence complexes, M2[AuIX2][AuIIIX4] (M = Rb, Cs; X = Cl, Br, and I), having perovskite-type structure. In spite of the three dimensional perovskite-type structure, the charge transfer interaction between AuI and AuIII in these…
Domain II (residues 189-338, M(r) = 16 222) of glutamate dehydrogenase from the hyperthermophilic bacterium Thermotoga maritima was used as a model system to study reversible unfolding thermodynamics of this hyperthermostable enzyme. The protein was produced in large quantities in E.COLI: using a T7 expression system.…
The charge density and bond character of the rutile-type structures of SiO 2 , GeO 2 and SnO 2 were studied by X-ray diffraction using monopole refinement. The refinement of the charge density was performed by least-squares refinement including the Κ-parameter and the electron population in the X-ray atomic scattering…
This work describes the measurement and analysis of circular polarization in the luminescence (CPL), in the near-IR spectral region, from chiral complexes of Yb(III) and Nd(III) in solution. The experimental technique is based upon previous measurements of CPL in the visible region. Instrumentation design, performance…
Nanocrystalline MgAl 2 O 4 spinel powder was synthesized by pyrolysis of complex compounds of aluminum and magnesium with triethanolamine (TEA). The soluble metal ion–TEA complexes formed the precursor material on complete dehydration of the complexes of aluminum–TEA and magnesium–TEA. Single‐phase MgAl 2 O 4 spinel p…
Improved performance of polymers, with respect to their mechanical and electrical properties for microelectronic applications, for example, can be obtained by introducing nanometer-size inorganic particles into the polymer matrix. The preparation and properties—particularly the photolithographic ones—of hybrids of a p…
Postirradiation heating tests of TRISO-coated UO2 particles at 1700 and 1800°C were performed to understand fission product release behavior at accident temperatures. The inventory measurements of the individual particles were carried out before and after the heating tests with gamma-ray spectrometry to study the beha…
The specific heat of ${\mathrm{NdCrO}}_{3}$ in the thermal range from 0.3 to 300 K is presented. The magnetic ordering of Cr ions at ${T}_{N}=219\ifmmode\pm\else\textpm\fi{}1\mathrm{K}$ is observed, as well as the spin reorientation transition (SRT) at ${T}_{\mathrm{SRT}}=34.2\ifmmode\pm\else\textpm\fi{}0.5\mathrm{K}.…