Materials Literature
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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}.…
A comparative study of the reflection spectral resonances in weakly and strongly modulated subwavelength gratings is presented. The effects of strong modulation in resonant subwavelength gratings have been largely ignored in the literature. We show that the spectral stability of resonances as a function of angle of in…
Analysis of soil pattern, especially the pattern of depletion and accumulation zones, is a powerful tool to decipher pedogenic processes at the landscape scale. To clarify the pedogenesis of a distinct pattern of podzolized soils in the cool, perhumid Black Forest (Germany) we performed a study in the forested upper p…
Abstract This review is intended to supply the practicing chemist with a working knowledge of the chemistry of silicone compounds. It has been divided into two parts, the first dealing with basic chemistry of silicones [O'Lenic, A.J., JSD 2 , 229 (2000)] and the second with silicone‐based surfactants, specifically dim…
The compositions of aqueous fluids in equilibrium with enstatite + forsterite were investigated at temperatures from 900 to 1200 °C and pressures from 1.0 to 2.0 GPa. Experiments, performed in a piston-cylinder apparatus, involved the location of phase boundaries between the stability fields of enstatite and enstatite…
Dissipative Particle Dynamics (DPD) has, with only a few exceptions, been used to study hydrodynamic behavior of complex fluids without confinement. Previous studies used a periodic boundary condition, and only bulk behavior can be studied effectively. However, if solid walls play an important role in the problem to b…
The aim of this work is to provide useful quantitative support for theories of the restitution coefficient for normal impacts involving plastic deformation, especially in the region close to the threshold at which plastic deformation begins. The impacts were from spheres of 5 mm diameter of aluminium oxide (which defo…
[Fe3(hyetrz)6(H2O)6](CF3SO3)6 [hyetrz = 4-(2′-hydroxyethyl)-1,2,4-triazole] represents the first structurally characterized iron(II) spin crossover compound for which the structure has been solved above and below room temperature in both spin states. The compound crystallizes in the trigonal system, space group R3¯, a…
Six different preceramic polymers were pyrolyzed via conventional and microwave hybrid heating; these polymers provide a range of carbon content and local atomic coordination. The products were compared with each other using X‐ray diffractometry and transmission electron microscopy. Nanocrystalline β‐SiC was the princ…
Chalcogenide glass fibers based on sulphide, selenide, telluride, and their rare earth doped compositions are being actively pursued both at the Naval Research Laboratory in Washington, D.C. (NRL) and worldwide. Great strides have been made in reducing optical losses using improved chem ical purification techniques, b…
The spontaneous resistivity anisotropy of ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ and ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ films was measured as a function of temperature for various current and magnetic field directions. The anisotropic magnetoresistance was analyzed within the two-current model sub…
Thin ZnO films, both native and doped with secondary metal ions, have been prepared by sputter deposition and also by casting from solutions containing a range of precursor salts. The conductivity and infrared reflectivity of these films are subsequently enhanced chemically following treatment in H2 gas at 400 °C or b…
Dynamic magnetic properties of the colossal magnetoresistance ferromagnet ${\mathrm{Nd}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$ have been explored by ac-susceptibilities and dc-magnetization measurements. The system orders magnetically below ${T}_{c}\ensuremath{\approx}235$ K with a large difference between zero-…
The effects of the acidity of the carbon surface on the reactivity and selectivity of carbon supported noble metal catalysts in the reductive amination of benzaldehyde with ammonia was studied. The equilibria involved in the homogeneous solution were studied with 1H NMR. At the start of the reductive amination, dibenz…