Materials Literature
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We present the results of a systematic ac calorimetric study on the smectic-$A$ to nematic ($\mathrm{Sm}\ensuremath{-}A--N$) phase transition for the alkylcyanobiphenyl liquid crystals, 8CB and 9CB, imbedded in the randomly interconnected voids of Millipore cellulose membranes. The confining void size ranged from 5 to…
The stress of Pt films deposited at various temperatures and its correlation with the formation of hillocks during heat treatment were investigated. The residual stress changes from compressive to tensile as the deposition temperature increases. The compressive residual stress of a Pt film deposited at room temperatur…
Nonlinear transient heat conduction in a finite slab with potential-exponential temperature-dependent specific heat and thermal conductivity is investigated numerically by using the network method. A general network model for this process is proposed, whatever the exponent of the temperature-dependent functions may be…
Crystallization mechanism of Ge 2 Sb 2 Te 5 thin films sandwiched between SiN layers was optically investigated and double transition temperatures were observed in the case of Ge 2 Sb 2 Te 5 film thickness of more than 20 nm. The activation energies were estimated by both Kissinger's and Johnson-Mehl-Avrami equations,…
The authors investigated the characteristics of the electromagnetic spectrum caused by partial discharges (PDs) in air at three different types of high-voltage substations. From the measured results, they characterized the electromagnetic noise spectrum depending on the type of substation. They also measured the long-…
Thermal conductivity measurements on porous metal hybride compacts were performed to supplement the limited existing data. These materials are proposed for reactors that are designed for heat-pump applications requiring high specific powers. Previous computational studies have shown that the effective thermal conducti…
Recently, the clinical application of electronic portal imaging devices has enabled more frequent verification of patient setup for radiation treatment. However, the image quality has sometimes proven to be inadequate, motivating the investigation of alternative sensors with better image quality. Amorphous selenium (a…
The first sharp diffraction peak which signifies medium-range structural order in chalcogenide glasses has been studied based on some observations and the construction of ball-and-stick models. The crystalline model originally proposed by Vaipolin and Porai-Koshits provides straighforward explanations for most feature…
The reversible cleavage of indole-3-glycerol by the alpha-subunit of tryptophan synthase has been proposed to be catalyzed by alphaGlu49 and alphaAsp60. Although previous x-ray crystallographic structures of the tryptophan synthase alpha2beta2 complex showed an interaction between the carboxylate of alphaAsp60 and the…
Poly(oxyethylene)s containing n -octylthiomethyl side groups were synthesized by the reaction of poly[oxy(chloromethyl)ethylene] (CE) and sodium n -octanethiolate in DMAc. These were oxidized to poly(oxyethylene)s containing n -octylsulfonylmethyl side groups. When the mole percentage of sulfur containing monomeric un…
Various kinds of alkali-free Ga-substituted MCM-41 catalysts were synthesized. The BET surface area of all catalysts was over 700 m2/g, and the XRD patterns suggested the hexagonal structure. The hexagonal repeat distance was controlled by changing the carbon number of the surfactant. The acid-probe reaction, 2-methyl…
Nine solution‐phase electrochromic thin‐layer cells based on N,N' ‐di‐ n ‐heptylviologen perchlorate, , and N,N,N',N' ‐tetramethyl‐ p ‐phenylenediamine, TMPD (50 mM each in , no supporting electrolyte), were arranged in three rows and three columns, and were matrix‐addressed without crosstalk with six inputs. The abse…
A low concentration of rare earths $(R)$ plays an important role in magnetic materials because of their large anisotropy. However, the Curie temperature ${(T}_{C})$ has a decreasing trend with increasing Fe concentration in $R$-Fe compounds. In order to understand the variation of ${T}_{C}$ as a function of iron conce…
A thin film multilayer structure consisting of Pb(Zr0.53Ti0.47)O3(PZT) and PbTiO3(PT) were fabricated by a sol-gel process. The effects of the number of PZT/PT layers upon microstructure and dielectric characteristics were investigated. For a pure PZT thin layer annealed at 600 °C, the microstructure observed was a ro…
Abstract The feasibility of shaping a nucleated polymer/gas solution represents a significant advancement for microcellular plastics process technology. Through proper design of the foaming die, nucleated solution flows can be shaped to arbitary dimensions while maintaining the functional independence of cell nucleati…
Homogeneous and inhomogeneous spectral linewidths of the ${(}^{2}{F}_{5/2}{)}_{1}\ensuremath{-}{(}^{2}{F}_{7/2}{)}_{1}$ transition in ${\mathrm{Yb}}^{3+}$-doped fluorozirconate glasses are determined by fitting Voigt profiles to the inhomogeneously broadened emission and absorption spectra between 10 and 300 K. The ho…
The final phases of zirconia powders depend on the synthesis method employed, and the amounts of stabilizer present. In this study, ceria‐ and yttria‐doped zirconia powders were prepared by urea hydrolysis and subsequent hydrothermal treatment. The amount of tetragonal ( t ) vs monoclinic ( m ) phase in the powders in…
A homology-based modeling study on the extremely halophilic glutamate dehydrogenase from Halobacterium salinarum has been used to provide insights into the molecular basis of salt tolerance. The modeling reveals two significant differences in the characteristics of the surface of the halophilic enzyme that may contrib…
Persistent spectral hole burning has been observed at 77 K, 180 K, and room temperature for Eu(3+) in sodium aluminosilicate glass melted under a reducing atmosphere. In particular, room-temperature persistent spectral hole burning is reported for the first time to our knowledge in Eu(3+) -doped materials. The persist…
Microfabrication by coextrusion is a novel ceramic processing technique capable of creating complex ceramic‐metal structures. These structures are fabricated by multiple pass coextrusion of a feedrod comprised of several powder‐filled thermoplastic compounds. The compounds contain either ceramic, metal, or fugitive po…