Materials Literature
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The Raman spectra of the three phases of the perovskite ${\mathrm{RbCaF}}_{3}$ have been recorded. A detailed group-theoretical analysis together with a rigid-ion model calculation in the cubic symmetry have been carried out in order to identify the observed peaks. The established compatibility relations demonstrate t…
Moldable poly(dimethylsiloxane) formulations are described which use so-called MQ resins as reinforcing fillers. These formulations employ platinum-catalyzed hydrosilylation as the cure reaction. The platinum catalysts were prepared by spray-drying solutions composed of vinyl-containing MQ resins with platinum(0) comp…
Abstract Reaction calorimetry has found widespread acceptance as a valuable tool that provides a combination of thermal hazard and process data for batch‐type reactors. There have been many significant advances in this type of instrument over the last few years, which include both improvements in methodology and the a…
The polymerizability of 4-vinylazobenzene; (VAB), a vinyl monomer containing an azobenzene chromophore directly attached to the polymerizable double bond, was investigated in the presence of radical, anionic, cationic, and Ziegler−Natta type catalysts. The homo- and copolymerization of VAB with (−)-menthyl methacrylat…
Abstract Predicting P sorption by weathered soils in order to manage soil, crop, and natural resources has been an important but elusive goal of soil science for decades. This study evaluated several soil properties, including mineralogy, of weathered Hawaiian soils in terms of their utility as predictors of P sorptio…
VMSW (variable magnetization and Stoner Wohlfarth model) method is effective for numerical analysis of anisotropic permanent magnets. This method however, has a serious restriction of the way of dividing elements. Therefore, the conventional VMSW method cannot be applied to the analysis of materials of complicated sha…
The deformation behavior of a range of polyethylene materials which differ with respect to both their short-chain branch content and molecular weight has been studied. Mechanical measurements carried out over a wide range of temperatures have shown that there is a sudden transition in the measured tensile yield strain…
In this paper, we prove that solutions of the anisotropic Allen--Cahn equation in double-obstacle form with kinetic term \begin{displaymath} \varepsilon \beta(\nabla \varphi) \partial_t \varphi - \varepsilon \nabla A'(\nabla \varphi) - \frac{1}{\varepsilon} \varphi = \frac{\pi}{4} u \quad \mbox{ in } [|\varphi| < 1],…
Abstract Base catalized intermolecular cyclization of 2‐amino‐3‐chloro‐5,6‐dicyanopyrazines gave 5,10‐disubsti‐tuted‐2,3,7,8‐tetracyano‐5,10‐dihydrodipyrazino[2,3‐ b :2′,3′‐c]pyrazines 11–20. These compounds have rather small molecular size but have strong intramolecular charge‐transfer chromophoric system. They have…
Cu lines 0.25 μm wide are successfully patterned by high-temperature dry etching without sidewall protection of the deposited films. Use of Cl2 gas as a single reactant rather than a mixture of gaseous chlorine compounds is the key to this anisotropic etching. This reactant suppresses the side etching of Cu patterns w…
The growth and morphology of crystals of hard colloidal spheres is monitored by a special photographic technique. Crystals are observed to grow in size and increase in number density, initially. This is followed by a decrease in size and an increase to saturation in the number density. During the growth stage the crys…
BEDT-TTF is the donor of the highest T c organic superconductors. Isotopic shift experiments support an electron−phonon coupling mechanism for the superconductivity. However, the vibrational levels have been only partially observed and assigned, making testing of this mechanism difficult. In order to provide a complet…
The internal structure (the monomer density profiles) of weakly charged polyelectrolyte brushes of different morphologies has been analyzed on the basis of the self-consistent-field approach. In contrast to previous studies based on the local electroneutrality approximation valid for sufficiently strongly charged or d…
The packing of cylindrical particles with log‐normal and modified power‐law length distributions has been experimentally studied. The results indicate that the packing density is heavily dependent on the parameters in the two distributions. However, this dependence cannot be predicted by the direct analogy to that for…
The water uptake of nominally 5%‐Yb‐doped strontium zirconate (SrZr 0.95 Yb 0.05 O 3−α ) was studied in situ by thermogravimetry at different temperatures and water vapor pressures. The process could be described in terms of an ideal solution behavior, showing a lower effective vacancy concentration than that expected…
An efficient first-order algorithm with an exact calculation of the gradients is described and applied to the refinement of inhomogeneous dielectric thin films. Numerical results calculated at normal and oblique angles of incidence are correlated with an important mathematical theorem. It is shown that, when appropria…
The authors present a robotic system incorporating vision and force/torque sensing for handling flat textile materials and describe the results of experiments to measure the accuracy and reliability of the system for a variety of representative handling tasks for textile materials.
The aliphatic double bond of poly(2-cinnamoylethyl methacrylate) (PCEMA) displayed a characteristic surface-enhanced Raman scattering (SERS) peak at 1640 cm -1 . Polystyrene (PS), together with the phenyl rings of PCEMA, contributed to the peak at 1005 cm -1 . We determined the intensity ratio of these two peaks, i.e.…
The effect of flexible spacer length on the phase transitions and mesophase structures of main-chain thermotropic liquid-crystalline polyesters having bulky pendent side groups was investigated using differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), and polarizing optical microscopy (POM).…
DSC measurements have been performed on the monomeric form of yeast hexokinase B in the absence and presence of increasing concentrations of D-glucose. The hexokinase, in the absence of D-glucose, at both pH 8.0 and 8.5, shows reproducible calorimetric profiles characterized by the presence of two partially overlapped…