Materials Literature
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Repassivation kinetics of rapidly scratched scars on the surface of type 304 (UNS S30400) stainless steel (SS) in a chloride solution was examined using an ampero-chronometric method. Its relationship to stress corrosion cracking (SCC) susceptibility measured by slow strain rate tests (SSRT) was explored. The repassiv…
Abstract When an enantiomer of resolved indolylfulgide (1) or either of the (R)-binaphthol-condensed indolylfulgides (2, 3) was mixed with a nematic liquid crystal (5CB), the cholesteric phase was induced. Their cholesteric pitches were reversibly changed by photoirradiation. Whereas the twisting ability of the choles…
Pseudomonas oleovorans forms medium-chain-length poly(3-hydroxyalkanoate) (PHA) most effectively at growth rates below the maximum specific growth rate. Under adequate conditions, PHA accumulates in inclusion bodies in cells up to levels higher than half of the cell mass, which is a time-consuming process. For PHA pro…
Systematic electrical and mechanical studies were carried out on natural rubber (NR) blended with different types of synthetic rubber such as styrene-butadiene rubber (SBR), polybutadiene rubber (BR), and ethylene-propylene-diene monomer (EPDM) as nonpolar rubbers and nitrile-butadiene rubber (NBR) and chloroprene rub…
Homoleptic complexes of the type [M(L–L)2]+/2+ where L–L is a chelating tetrathiafulvalene-based phosphine ligand have been synthesized and fully characterized by X-ray crystallography, 31P{1H} NMR spectroscopy and electrochemistry. In this study, square-planar cations of Pd(II) and Pt(II) with tetrakis(diphenylphosph…
The deposition of rare earth metal (REM) rich (hydr)oxide films on pure iron and zinc surfaces has been studied using in situ ellipsometry. Iron and zinc surfaces freely corroding in near‐neutral aerated aqueous sodium chloride were found to be covered with 6–15 nm thick native (hydr)oxide films. The kinetics of REM‐r…
Polycrystalline with a relative density in excess of 97% was prepared. The specimens contained a lower concentration of impurities than those examined previously. Oxygen diffusion experiments were performed for the temperature range from 800 to 1300°C, in an oxygen partial pressure of . The concentration profile of in…
Abstract We investigate the excitation by sound waves of capillary trapped oil blobs. The three-phase contact lines either remain pinned to the heterogeneities of the solid surface or slide if sound waves are applied. We derive approximate, analytical expressions for the resonance of oil blobs in capillary tubes for b…
The ion transport properties and electrochemistry of both chemically prepared and electrochemically prepared poly(3,4-ethylenedioxythiophene)–poly(styrene-4-sulfonate) composites have been investigated by cyclic voltammetry and impedance spectroscopy in a variety of electrolyte solutions. The polymers exhibited facile…
It has previously been demonstrated in the setting of an isolated limb perfusion that application of high-dose TNF-alpha in combination with chemotherapy (melphalan, doxorubicin) results in strong synergistic antitumor effects in both the clinical and preclinical settings. In this study, we demonstrate that systemic a…
A crystalline block copolymer of poly(ethylene-block-ethylene oxide) (PE-b-PEO) was successfully grafted onto a carbon black surface by direct condensation of its terminal hydroxyl groups with carboxyl groups on the surface using N,N′-dicyclohexylcarbodiimide as a condensing agent. The electric resistance of the compo…
The multiplet structures of ${\mathrm{Cr}}^{3+}$ and ${\mathrm{V}}^{3+}$ in $\ensuremath{\alpha}\ensuremath{-}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ $(\ensuremath{\alpha}\ensuremath{-}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}{:\mathrm{C}\mathrm{r}}^{3+}$ and $\ensuremath{\alpha}\ensuremath{-}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}{:\ma…
Isomorphous substitution of Si by Ti in the framework of ITQ-7, the crystalline silica polymorph of lowest density, has been achieved by direct synthesis, affording its three dimensional system of large pore channels to be used in selective oxidation reactions.
A novel porous chitosan/gelatin scaffold for tissue engineering was prepared via polyelectrolyte complex formation, freeze drying and post-crosslinking with glutaraldehyde. The porosity and mean pore diameters could be controlled within 30∼100 µm by varying the original water content and the freezing conditions. Dippi…
The thermodynamic properties of anion exchange on a chloride-intercalated zinc–aluminium layered double hydroxide have been studied at 298.15 K. The heats for total exchange of Cl− for F−, Br−, I−, OH−, NO3−, and SO42− have been determined by microcalorimetry and the standard molar enthalpies of these exchange reactio…
Dependencies of optical transmittance and luminescence of ${\mathrm{Y}\mathrm{A}\mathrm{G}:\mathrm{C}\mathrm{r}}^{4+}$ crystals upon intensity of excitation at 1064 nm are investigated, when absorption of tetrahedrally coordinated ${\mathrm{Cr}}^{4+}$ ions $({\mathrm{Cr}}^{4+}$ centers) is saturated. The spectroscopic…
Changes to the mechanical and physical properties of a glass-reinforced resole phenolic composite due to intense radiant heat and fire are investigated. Fire testing was performed using a cone calorimeter, with the composite exposed to incident heat fluxes of 25, 50, 75 or 100 kW/m2 for 325 s and to a constant flux of…
The recording of stable and reversible full-color images in the photon mode is reported here. The material is composed of the dicholesteryl ester shown in the Figure, which, when mixed with a small amount of an azobenzene derivative known to be photochemically isomerizable, is able to record full-color images (see als…
Recently the authors have presented a method to prepare activated carbon fiber with high bulk density (HD-ACF) without using any binders. The possibility of using the HD-ACF as an electrode for electric double‐layer capacitors (EDLCs) was examined in this paper. The capacitance of the EDLC with the HD-ACF electrode in…
The syntheses of the basic bismuth(III) nitrates [Bi6O5(OH)3](NO3)5·3H2O, A, [Bi6O6(OH)3](NO3)3·1.5H2O, B, and [Bi6O5(OH)3](NO3)5·2H2O, X, were investigated. A is readily obtained in hydrolysis of bismuth(III) nitrate solutions with sodium hydroxide solutions and in homogeneous hydrolysis with dilute solutions of urea…