Materials Literature
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Using 2,6- and 2,4,6-alkyl-substituted sterically hindered primary amines, N-bonded silicon dichlorides RN(SiMe 3 )(Si(Me)Cl 2 ) (R = 2,6-Me 2 C 6 H 3 ( 1a ), R = 2,6- i -Pr-C 6 H 3 ( 1b ) and R = 2,4,6-Me 3 C 6 H 2 ( 1c ) have been prepared. Controlled hydrolysis of these dichlorides afforded the N-bonded silanediols…
Electron-energy-loss spectroscopy (EELS) in a high-resolution transmission electron microscope can be used to study the excitation of plasmons in nanometre-size particles with high spatial resolution. For isotropic particles of various shapes, models which allow the attribution of the experimental peaks to a certain e…
Surface relief associated with martensitic transformation—tetragonal‐to‐monoclinic phase transformation—that occurred during isothermal aging at temperatures of 400 and 473 K was observed via atomic force microscopy, using prepolished and thermally etched surfaces of zirconia–3 mol% yttria that was sintered at a tempe…
The deformation of both high density polyethylene and polypropylene undergoing equal channel angular extrusion (ECAE) has been investigated, and the resultant molecular orientation characterised by X-ray diffraction. The ECAE process using a 45° extrusion angle is found to result in permanent deformation only when a c…
Abstract Tris(acetylacetonate)ruthenium, Ru(acac)3, successfully reacts with the lacunary heteropolyoxometalate, K8[SiW11O39] under hydrothermal conditions (6 MPa nitrogen at 200 °C), to give the mono-substituted heteropolyanion, [SiW11O39Ru(III)(H2O)]5−. The heteropolyanion shows notable activity on the air oxidation…
Electronic and geometrical structures of bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) molecules are studied using ab initio molecular orbital methods. The optimized structure of a BEDT-TTF monomer is close to the experimental one within errors of 0.02 Å and 0.5 deg in bond length and angle, respectively, except th…
Expression of Bcl-x protein was evaluated in hen ovarian follicles, relative to stage of development, and in cultured granulosa cells after treatment with various apoptosis-suppressing or -inducing agents. Using Western blot analysis, Bcl-X(LONG) was most frequently observed migrating as a doublet with a molecular mas…
The high rate discharge capability of the negative electrode in a Ni/MH battery is mainly determined by the charge transfer process at the interface between the metal hydride (MH) alloy powder and the electrolyte, and the transfer process in the bulk MH alloy powder. In this study, the anodic polarization curves of a…
The structural changes associated with the ferromagnetic (FM)/metallic to antiferromagnetic (AFM)/insulating transition of ${\mathrm{Pr}}_{1/2}{\mathrm{Sr}}_{1/2}{\mathrm{MnO}}_{3} (I4/mc\stackrel{\ensuremath{\rightarrow}}{m}{P2}_{1}/n)$ are described in detail. Based on high-resolution neutron-diffraction data, in th…
Abstract Blends of polypropylene and polyamide‐6,6 have compatibilized with polypropylene that was carboxylated through a reactive extrusion process with an asymmetric functional peroxide. The compatibilized blends demonstrated a finely dispersed minor phase as shown by SEM. Because of the enhanced dispersion, additio…
A quantitative method for evaluating seam pucker in garment manufacturing is devel oped from three-dimensional image analysis using artificial intelligence. A laser scanning system created with a specially designed laser sensor measures the surface profile of seam pucker. Since the conventional AATCC rating system is…
Functionalization of triphenylene-based discotic liquid crystals by direct nitration of hexaalkoxytriphenylene has very recently been reported to produce exclusively the mononitrohexaalkoxytriphenylene. W e have found that nitration of such discotics is not restricted to only one ring of triphenylene, but all the thre…
Abstract BaTiO3 coating films were prepared from Ba(CH3COO)2-Ti(OC3H7i)4-H2O-CH3COOH-C3H7i OH solutions containing poly(vinylpyrrolidone) with average molecular weight of 630000. Formation of crack-free BaTiO3 films 1.2 μm in thickness was successfully achieved via single-step, non-repetitive dip-coating. The film had…
This paper investigated the curing process and mechanical properties of protein based polymers made from soybeans. Soybean protein isolate mixed with additives was used to fabricate test specimens. First, the flow-curing properties of the soy-protein polymer were examined. Then, a curing procedure was designed based u…
An experiment was conducted to show the presence of ethylene as catalyst reactivator in the propene-styrene copolymerization. The copolymerizations have been performed by bubbling the gaseous monomers at atmospheric pressure into a flask containing a styrene solution of the prototypical ansa-zirconocene complex rac-(e…
Abstract Tetrathiafulvalene (TTF) derivatives with diarylethene moieties have been synthesized. A derivative having 2,4,5-trimethylthiophene rings as the aryl groups showed photochromism, while a derivative with 2,5-dimethylthiophene rings did not show any color change by UV irradiation. The different reactivity was a…
The fluorite-related cubic structure of yttria-stabilized zirconia, Zr(0.75)(8)Y(0.24)(2)O(1.87)(9), has been studied by single-crystal X-ray diffraction using synchrotron radiation and by EXAFS. Two diffraction data sets obtained at X-ray energies of 512 and 10 eV below the Y K edge revealed that in the average struc…
The ophD gene, encoding a permease for phthalate transport, was cloned from Burkholderia cepacia ATCC 17616. Expression of the gene in Escherichia coli results in the ability to transport phthalate rapidly into the cell. Uptake inhibition experiments show that 4-hydroxyphthalate, 4-chlorophthalate, 4-methylphthalate,…
We have studied the time-dependent resistivity of $\ensuremath{\kappa}\ensuremath{-}({\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{T}\mathrm{F})}_{2}{\mathrm{Cu}[\mathrm{N}(\mathrm{CN})}_{2}]\mathrm{Br},$ a high transition temperature organic superconductor ${(T}_{c}$=11.6 K), in the tempera…
The preparation, crystal structures, and variable-temperature magnetic susceptibility data for two dithiosquarate-bridged copper(II) complexes of formulas [Cu(2)(bpca)(2)(1,2-dtsq)(H(2)O)].2H(2)O (1) and [Cu(2)(bpca)(2)(1,3-dtsq)].2H(2)O (2) (where bpca = the bis(2-pyridylcarbonyl)amide anion, 1,2-dtsq = dianion of 3,…