Materials Literature
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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,…
The multiwavelength anomalous dispersion (MAD) method of protein structure determination is becoming a routine technique in protein crystallography. The increased number of wavelength-tuneable synchrotron beamlines capable of performing challenging MAD experiments, coupled with the widespread availability of charge-co…
The reaction of hexachlorocyclotriphosphazene with two equivalents of the chelating diols 2,2′-dioxybiphenyl and 2′,2′′-dioxy-1′,1′′-bi-2-naphthyl was investigated. Although a mixture of different stereoisomers may be expected, only the formation of the meso-compounds [(R,S)-(O,O)2Cl2P3N3] is found (O,O stands for the…
Icosahedral Al71Pd21,Mn8 quasicrystals have been grown from the ternary melt via a ‘self-flux’ technique. The nucleation is exceptionally well controlled, and individual grains can have masses of up to almost 30 g (limited only by the dimensions of the growth crucible). The quasicrystals grown by this technique are re…
For the binary Ti–Al system, an ordering transformation in Ti3Al has been shown to result in a significant lowering of the electronic heat-capacity coefficient, γ, by removing electrons from conducting states. When γ is normalized to a per Ti atom basis, the same tendency is found in low temperature calorimetric studi…
The complex refractive index of a LiF crystal surface layer irradiated by low-energy electrons is modified by the stable formation of color centers embedded in it. A simplified dipole-electromagnetic field interaction model has been adopted in order to estimate the dispersion curves of colored LiF from a single optica…
Ruthenium (Ru) films were deposited by liquid source chemical vapor deposition using bis-(ethylcyclopentadienyl)ruthenium (Ru(C 2 H 5 C 5 H 4 ) 2 ). The crystalline structure, resistivity and residual impurities in the Ru films were investigated. The Ru films were polycrystalline and had a columnar structure; they sho…
Flax that has been mechanically treated in an opener-blender to disrupt stem integrity is enzymatically retted with a series of enzyme formulations with different levels of Flaxzyme with or without ethylenediamine-tetra-acetic acid (EDTA) as a chelator. Samples are then characterized by light and transmission electron…
Aqueous suspensions of V 2 O 5 ribbons form a lyotropic nematic phase at volume fractions larger than 0.7%. We investigate the effect of adding a monovalent salt (NaCl) to this charge-stabilized system. Without any added salt, the nematic ordering can be described by the Onsager model based on a hard-core repulsive po…
We have synthesized four different types of dimesogenic compounds involving the cholesteryl moiety as one of the mesogenic constituents, and have investigated their liquid crystalline properties. The molecular structures of these dimesogens have been confirmed by spectral analyses; they exhibit a rich polymorphism, as…
Dislocation density studies have been performed on icosahedral Al-Pd-Mn single quasicrystals after plastic deformation and after subsequent heat treatment. The deformation tests were carried out at a constant strain rate of 10- 5 s-1 at temperatures between 695 and 820 C. The heat treatments were performed at 730 C, c…
A method is described that permits the cooling of protein crystals without the use of conventional cryoprotective agents. Covering the crystal completely with highly liquid dry paraffin oil (Merck) prevents ice formation. It is suggested that this method, because of its simplicity, be tried as a first choice in cryocr…
CN x films were deposited on Si(100) substrates at a substrate temperature of 600 °C using dc magnetron sputtering of a high-purity graphite target in pure nitrogen. The film characteristics were primarily controlled by the pressure, p, (0.05–5 Pa), the discharge current on the magnetron target, Im, (0.5–3 A), and the…