Materials Literature
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Two phosphorus-containing diacids were synthesized from 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) and either maleic acid or itaconic acid and then reacted with diglycidyl ether of bisphenol A (DGEBA) to form two series of advanced epoxy resins. Reaction conditions, such as reaction time, temperature an…
Double-layer capacitors are a recent technology based on the well-known electrochemical phenomenon of extremely high capacitance/unit area in an electrode-electrolyte interface and the high surface area achievable in activated carbon fibers. Capacitances are available in the range of a few farads to a few hundred fara…
Phase-type gratings formed by photochemical phase transitions of a polymer azobenzene liquid crystal have been characterized. The sensitivity of the material was improved by a factor of 23 in the liquid-crystalline phase owing to effective induction of the photochemical phase transition in the bright fringes of the in…
Pseudomonas oleovorans (ATCC 29347) was grown in batch and chemostat cultures with citrate, hexanoate, heptanoate, octanoate, and nonanoate as single carbon substrates. The growth medium for batch cultures was adjusted such that nitrogen (NH(4)(+)) limitation terminated the exponential-growth phase. During batch culti…
Tissue engineering has been applied to various tissues, and particularly significant progress has been made in the areas of skin, cartilage, and bone regeneration. Inclusion of bioactive factors into the synthetic scaffolds has been suggested as one of the possible tissue engineering strategies. The growth factors are…
Manganese-exchanged Al-MCM-41 modified by the chiral salen ligand [(R,R)-(−)-N,N′-bis(3,5-di-tert-butylsalicylidene)cyclohexane-1,2-diamine] has been investigated as a heterogeneous catalyst for the enantioselective epoxidation of (Z)-stilbene using iodosylbenzene as oxygen donor, with particular interest in the effec…
Abstract Mesoporous silica can be synthesized by either the alkaline route or the acidic route, both using surfactants as templates. Morphological transformations of mesoporous silica can produce various hierarchical orders. Different morphologies are produced under different synthetic conditions. In the alkaline rout…
The stability and photophysical properties of trivalent lanthanide complexes with 2,2′;6′,2′′-terpyridines substituted in the 4 position (L1, t-butyl; L2, ethyl) have been compared to those with the unsubstituted ligand terpy. The stability constants log β3 of complexes with L1 and terpy are similar and reflect a pref…
The structure of zinc-substituted nickel hydroxide is investigated as a function of the amount of zinc. The hydroxide shows a β-type structure with up to 10% zinc in substitution for nickel (in mol), whereas an α-type phase is stabilised with 20–50% zinc. For the β-type phases, the unit cell parameters are similar to…
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…