Materials Literature
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Pretulite is a new Sc phosphate with zircon-type structure from the phyllite-micaschist hosted hydrothermal lazulite-quartz veins in the Lower Austroalpine Grobgneis complex, eastern Austria. The new species is the Sc-dominant analogue of xenotime-(Y) and occurs as an accessory mineral in all investigated lazulite spe…
Several series of new b-nylon 6-b-polyimide-b-nylon 6 triblock copolymers were synthesized via a condensation polymerization of polyimide segments and anionic polymerization of the nylon 6 components. Crystallization and phase behavior of these triblock copolymers have been studied with varying polyimide block molecul…
Solid samples of the salt [Eu〈LOEt〉2(H2O)2]BF4, (〈LOEt〉 = [CoCp{P(OEt)2O}3]) may be reversibly dehydrated under very mild conditions to give the corresponding mono aqua complex [Eu〈LOEt〉2(H2O)]BF4. The conversion can be monitored by single crystal x-ray diffraction. In the course of the reaction the crystallinity of t…
We have fabricated ferromagnet-insulator-ferromagnet junctions using a ramp-edge geometry based on (La0.7Sr0.3)MnO3 ferromagnetic electrodes and a SrTiO3 insulator. Pulsed laser deposition was used to deposit the multilayer thin films and the devices were patterned using photolithography and ion milling. As expected f…
Sintered Nd–Fe–B magnets were coated by pulse nickel plating at different plating conditions. Optimal pulse plating condition was established (average current density=1 A/dm2, peak current density=6 A/dm2 with Ton:Toff=1:2). In order to make a comparison, magnets with similar nickel coating thickness plated by dc were…
The solvent effect on the radiationless transition rates from the excited triplet MLCT (metal-to-ligand charge-transfer) states of tris(bipyridine)osmium(II) (Os(bpy) 3 2+; bpy = 2,2‘-bipyridine) and tris(phenanthroline)osmium(II) (Os(phen) 3 2+; phen = 1,10-phenanthroline) was investigated in water−methanol mixed sol…
The configurational distribution of phosphoglycerate kinase (PGK) strongly-denatured in 4 M guanidine hydrochloride solution is investigated using small-angle neutron scattering (SANS) and Monte Carlo computer simulation. It is shown that the experimental scattering profile can be represented by a random flexible chai…
The crystal structure of the recombinant apo-form of glycine N-methyltransferase (GNMT) has been determined at 2.5 A resolution. GNMT is a tetrameric enzyme (monomer Mr = 32,423Da, 292 amino acids) that catalyzes the transfer of a methyl group from S-adenosylmethionine (AdoMet) to glycine with the formation of S-adeno…
Three new compounds were obtained by slow diffusion of [Ni(dmit) 2 ] - (dmit = 2-thioxo-1,3-dithiole-4,5-dithiolato) into 4-(dimethylamino)-1-methylpyridinium [C 1 ] +, 4-[2-(4-(dimethylamino)phenyl)ethenyl]-1-methylpyridinium [C 2 ] +, and 4-[4-(4-(dimethylamino)phenyl)-1,3-butadienyl]-1-methylpyridinium [C 3 ] + . […
The single-ion $4f$ contributions to the components ${\ensuremath{\lambda}}_{2}^{\ensuremath{\alpha},2},$ ${\ensuremath{\lambda}}^{\ensuremath{\gamma},2},$ and ${\ensuremath{\lambda}}_{1}^{\ensuremath{\alpha},2}$ of the giant magnetostriction tensor of Tb and Er are calculated ab initio by a constrained density-functi…
The Hall coefficient, ${R}_{H},$ of the Mott-Hubbard system vanadium sesquioxide has a strong temperature dependence in the barely delocalized metal. As in the case of the cuprate superconductors, we find that the resistivity and the Hall angle of ${\mathrm{V}}_{2\ensuremath{-}y}{\mathrm{O}}_{3}$ follow different powe…
A rigid-plastic circular plate deflected by a rigid sphere is investigated. The behavior at large deflection is considered; the contribution from a bending moment is neglected. Approximate formulas for the load-deflection relationship are derived. Experiments are conducted and the test data compare well with the predi…
Co–Sm and Co–Pr films were deposited by dc magnetron sputtering. Transmission electron microscopy and magnetic measurement were used to study the microstructure and magnetic property relationship. The nanostructure of the as-deposited Co 19 at. % Sm films consists of two phases: the amorphous phase and the crystallite…
A new weighting scheme for the minimization function used in the Rietveld method for structure refinement using powder diffraction data is proposed. It has the form w = 1/Yeo with e ≃ 2 (Yo = observed profile intensity) and gives relatively heavier weights on weak intensities than weighting schemes currently used in t…
The influence of sulfate‐reducing bacteria (SRB) on the passivity of a Mo‐bearing austenitic stainless steel (SS), type 317L, was investigated using X‐ray photoelectron spectroscopy (XPS) and electrochemical techniques. Samples were exposed to a SRB culture, and then resultant surface states were analyzed by XPS and c…
Hocherman and Rosenau conjectured that long-wave unstable Cahn-Hilliard-type interface models develop finite-time singularities when the nonlinearity in the destabilizing term grows faster at large amplitudes than the nonlinearity in the stabilizing term (Phys.˜ D 67, 1993, pp. 113–125). We consider this conjecture fo…
The individual chains in the triple helix of collagen occur in a conformation related to polyproline II because of the presence of large number of imino peptide bonds. However, these residues are not evenly distributed in the collagen molecule which also contains many non-imino residues. These non-imino regions of col…
Sucrose is the major carbon source in molasses, the traditional substrate employed in the industrial acetonebutanol-ethanol (ABE) fermentation by solventogenic clostridia. The utilization of sucrose by Clostridium beijerinckii NCIMB 8052 was investigated. Extracts prepared from cultures grown on sucrose (but not xylos…
Single crystals of MnSiO(SiO 4 ) with the titanite structure together with MnSiO 3 clinopyroxene were synthesized from a MnO-SiO 2 oxide mixture at 1000 8C and 9.2 GPa in a multi-anvil press. The crystal structure of MnSi 2 O 5 [space group C2/c, a = 6.332(1) Å , b = 8.161(1) Å , c = 6.583(1) Å , β = 114.459(3)8, and…
A Mn–Zn ferrite with a grain size of about 2 μm has been developed for the transformer driven at around 1 MHz. The developed ferrite exhibits considerably lower core losses than a conventional Mn–Zn ferrite with a grain size of about 10 μm at a frequency of 0.5 to 2 MHz. The thin-type transformer using the developed f…