Materials Literature
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Detailed discussions and over 250 graphs and charts describe the effects of microstructure on the properties of carburized stees. In-depth coverage clarifies the causes, interpretation, prevention, and consequences of various microstructural variations and defects in carburized parts. Also covered are the effects of p…
The grain-boundary magnetoresistance of various ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ samples was investigated by resistance, magnetoresistance, and dynamic conductance measurements. Data on five samples, namely an epitaxial film, a polycrystalline film, a step-edge array, a mechanically induced g…
The stability of a number of transparent conducting oxide (TCO) films prepared by magnetron sputtering has been tested in various atmospheres at high temperatures up to 1000 °C: binary compounds such as ZnO, In2O3, and SnO2; ternary compounds such as Zn2In2O5, In4Sn3O12, GaInO3, ZnSnO3, and MgIn2O4; and multicomponent…
The smectic layer spacing of a nonfluorinated ferroelectric liquid crystal (FLC) compound with almost no shrinkage and only minor tendency to form zigzag defects was characterized by small angle x-ray diffraction. The material lacks a nematic phase. The smectic-A*-smectic-C* phase transition was studied by measuring t…
RATIONALE AND OBJECTIVES: To determine the safety and pharmacokinetics of gadobenate dimeglumine in a group of subjects with moderate or severe renal impairment. METHODS: The safety and pharmacokinetic profile of gadobenate dimeglumine, a gadolinium (Gd3+) chelate complex in development as a contrast agent for MRI, we…
New Raman and incoherent neutron scattering data at various temperatures and molecular-dynamic simulations in amorphous silica are compared to obtain the Raman coupling coefficient C (ω) and, in particular, its low-frequency limit. This study indicates that in the ω → 0 limit C (ω) extrapolates to a nonvanishing value…
Oxide superlattices composed alternatively of ferromagnetic metal layers of ${\mathrm{La}}_{0.6}{\mathrm{Sr}}_{0.4}{\mathrm{MnO}}_{3}$ and antiferromagnetic insulator layers of ${\mathrm{La}}_{0.6}{\mathrm{Sr}}_{0.4}{\mathrm{FeO}}_{3}$ were fabricated on ${\mathrm{SrTiO}}_{3}$ substrates by pulsed laser deposition wit…
A detailed study of upconversion processes in ${\mathrm{Cs}}_{3}{\mathrm{Er}}_{2}{X}_{9}$ $(X=\mathrm{C}\mathrm{l},\mathrm{}\mathrm{B}\mathrm{r},\mathrm{}\mathrm{I})$ crystals and in the diluted systems ${\mathrm{Cs}}_{3}{\mathrm{Lu}}_{2}{\mathrm{Cl}}_{9}:1%$ ${\mathrm{Er}}^{3+},$ ${\mathrm{Cs}}_{3}{\mathrm{Lu}}_{2}{\…
Metal–organo magnetic interactions involving lanthanideshave become important in the search for molecular magnetic materials. Here is reported the synthesis of a holmium(III)–nitronyl oxide compound (see Figure). The temperature dependence of its magnetic susceptibility reveals that it has a ferromagnetic ground state…
Soluble polyphenol was synthesized for the first time by enzymatic oxidative polymerization of phenol using peroxidase and hydrogen peroxide as catalyst and oxidizing agent, respectively. A mixed solvent of alcohol and buffer improved the polymer solubility toward N,N-dimethylformamide (DMF). The resulting polymer was…
We present some exact results for the effect of disorder on the critical properties of an anisotropic $\mathrm{XY}$ spin chain in a transverse field. The continuum limit of the corresponding fermion model is taken and in various cases results in a Dirac equation with a random mass. Exact analytic techniques can then b…
Ba x Sr 1‐ x TiO 3 (BST) powders were processed at temperatures <100°C by reacting nanosized TiO 2 powders in alkaline, aqueous solutions of BaCl 2 , SrCl 2 , and NaOH. The effects of processing variables (NaOH concentration, time, temperature, and the ratios of barium, strontium, and titanium initially in solution…
It is shown that currently used apparent power definitions, namely the arithmetic VA, S/sub A/ and the vector VA, S/sub V/, both lack an important property: the system power losses are not a linear function of the apparent power squared, S/sub A//sup 2/ or S/sub V//sup 2/. The only apparent power definition known toda…
In Situ X‐Ray Absorption Spectroscopy Characterization of V 2 O 5 Xerogel Cathodes upon Lithium Intercalation, Giorgetti, Marco, Passerini, Stefano, Smyrl, William H., Mukerjee, Sanjeev, Yang, X. Q., McBreen, James
A pneumatic pressure rig was designed to measure the effective d33 coefficient of thin film piezoelectrics by applying a known stress and monitoring the induced charge. It was found that the stress state imposed included components both perpendicular and parallel to the film plane. The later were due to friction and c…
The processes of intrinsic and extrinsic luminescence excitation by synchrotron radiation of 4--40 eV or electron pulses have been studied in $\ensuremath{\alpha}\ensuremath{-}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ single crystals at 8 K. The intrinsic A (7.6 eV) and E emissions (3.77 eV) can be effectively excited in the…
When an insulating material is subjected to electron irradiation, it produces a secondary emission the yield of which varies from a few percent to very high values (up to 24 per incoming electron) depending on the material and the experimental conditions. If the secondary electron emission yield is less than one, a ne…
In the course of plasma deposition of organic–polymeric thin films, radicals are incorporated into the growing film. These radicals initiate spontaneous oxidation reactions that continue over many weeks when the plasma polymers are stored in air. These reactions and their products have been previously studied in detai…
Several new approaches to biodegradable dendritic aliphatic block copolymers are described, including hyperbranched and dendrimer-like star structures. The hyperbranched polymers were obtained by the co-condensation of different AB 2 macromonomers. The macromonomers were prepared by ring-opening polymerization (ROP) o…
Poly(ethylene oxide)-b-poly(L-lactic acid) (PEO-PLLA) diblock copolymers were synthesized via a ring opening polymerization from poly(ethylene oxide) and l-lactide. Stannous octoate was used as a catalyst in a solution polymerization with toluene as the solvent. Their physicochemical properties were investigated by us…