Materials Literature
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Bismuth oxide is an interesting dielectric material with potential applications for optical coatings. MIS capacitors, and microwave integrated circuits. CVD growth has a number of advantages over other deposition techniques, e.g., precise control of oxygen activity, microstructure, and texture. The study presented her…
Microbiology Society journals contain high-quality research papers and topical review articles. We are a not-for-profit publisher and we support and invest in the microbiology community, to the benefit of everyone. This supports our principal goal to develop, expand and strengthen the networks available to our members…
The scattering of an electromagnetic plane wave incident upon an inhomogeneous multilayer structure is considered in symbolic form. In this framework a scattering-matrix propagation algorithm that decouples recurrences for backward- and forward-scattered wave amplitudes is developed. By construction the scattering-mat…
Activity comparable to that of noble metal catalysts is shown by the Mn‐, Co‐, or Fe‐stabilized ZrO 2 catalysts for the low‐temperature combustion of methane. The incorporation of the transition metal into the ZrO 2 bulk structure not only stabilizes the cubic (fluorite) modification, but also increases the reactivity…
Low-energy excitations were investigated in amorphous poly(methyl methacrylate) by means of both neutron and Raman scatterings, in a wide temperature interval. The frequency dependence of the light-vibration coupling coefficient was deduced, especially at low temperature where the quasi-elastic contribution is not sig…
Density fluctuations are monitored by small-angle light scattering during the crystallization of 0.22-\ensuremath{\mu}m-radius, hard colloidal spheres. Measured structure factors show an intensity maximum at finite-scattering vectors. The shape of the intensity distribution scales at early times during nucleation and…
Results of molecular-dynamics computer simulations are presented for a simple microscopic model of thermotropic liquid crystals. The system is composed of short multibead semiflexible chains where the beads are connected by an anharmonic spring. The intermolecular bead-bead interactions are modeled by Lennard-Jones po…
Reflection ellipsometry is applied to characterize the molecular orientation of rubbed polyimide films for liquid crystal display devices. Thickness, dielectric constants and tilt angle of the principal dielectric axis of the molecularly oriented upper layer and thickness of the random layer in rubbed polyimide films…
To improve the blood compatibility of a segmented polyurethane (SPU), phospholipid polymer, i.e., 2-methacryloyloxyethyl phosphorylcholine (MPC) copolymerized with cyclohexyl methacrylate or 2-ethylhexyl methacrylate, was blended into SPU as a polymeric additive. The blending was achieved by a solvent-evaporation tech…
Micromachined vertical mirrors and lenses in Si were fabricated as micro-optical components. A Cl2 plasma generated by an electron cyclotron resonance source was used to etch these mirrors and lenses in Si and the etched Si sidewalls were characterized by atomic force microscopy and scanning electron microscopy. A tri…
Vanadium pentoxide xerogel (XRG) materials have shown promise for use as cathodes in high energy density batteries. A composite cathode was formed from a mixture of the XRG, carbon, and two binders and studied in a coin cell configuration. The cathode, separator, and lithium anode were stacked in a 2016 coin cell cont…
Rheological properties in the nematic phase of 5CB (4-n-pentyl-4′-cyanobiphenyl) are investigated under applications of electric fields. When an electric field of a few kV mm−1 is applied, an increase in the apparent viscosity is observed with its amount being saturated at higher electric fields, which is accompanied…
SUMMARY Comprehensive accounts for the newly proposed concept of the random sampling technique are given in detail. This techniques involves random sampling of polymer molecules from an infinite number of polymeric species in the reaction mixture, and can provide a deeper insight into the complex molecular buildup pro…
The crystallization behavior and stoichiometric changes of barium titanium alkoxide‐derived monolithic gels prepared by the sol‐gel process using a high‐concentration Ba 2 Ti precursor solution (0.8 mol/L) were investigated during aging at room temperature. Crystallization of the gels (which were amorphous, per X‐ray…
An extrusion system that can create a polymer/gas solution rapidly for continuous processing of microcellular plastics is presented. Microcellular plastics are characterized by cell densities greater than 109 cells/cm3 and fully grown cells smaller than 10 μm. Previously these microcellular structures have been produc…
Among the nonthermal effects of ultrasound, acoustic cavitation may have the highest potential for therapeutic applications if it can be somehow controlled. Recent in vitro and in vivo experiments have demonstrated that sonochemically active cavitation can be enhanced an order of magnitude by superimposing the second…
The 9 methionine residues of vertebrate calmodulin (CaM) were individually changed to glutamine residues in order to investigate their roles in enzyme binding and activation. The mutant proteins showed three classes of effect on the activation of smooth muscle myosin light chain kinase, CaM-dependent protein kinase II…
UDP-galactose 4-epimerase from Escherichia coli catalyzes the interconversion of UDP-glucose and UDP-galactose. In recent years, the enzyme has been the subject of intensive investigation due in part to its ability to facilitate nonstereospecific hydride transfer between beta-NADH and a 4-keto hexopyranose intermediat…
An interferometric technique was developed to characterize in real time the etching rate of glasses with <100-nm resolution. The interferometer can be used to help reveal the charge distribution in poled glass.
A first order orientational transition, characterized by a 90\ifmmode^\circ\else\textdegree\fi{} azimuthal rotation of the surface easy direction, is reported for nematic liquid crystals (NLCs) anchored on self-assembled monolayers (SAMs). The SAMs are formed from alkanethiols [$\mathrm{C}{\mathrm{H}}_{3}{(\mathrm{C}{…