Materials Literature
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The paper considers the diagnosis of HV constructions which suffer from partial discharge (PD). Using previously developed statistical techniques the properties of discharge patterns are quantified in a fingerprint. Through the analysis of different defects and their fingerprints in HV constructions, the practical imp…
The hydrogenation of propyne on a range of supported palladium catalysts has been investigated. The catalysts all showed 100% selectivity to propene. A non-steady-state regime was observed when the catalysts were brought on line. During this period there was significant carbon laydown resulting in a surface Pd:C ratio…
The mesomorphic properties of three types of gold(i) acetylide complexes, [(ArNC)Au-CCAr, (ArNC)Au-CCR and (RNC)Au-CCAr, where R and Ar represent alkyl and aryl groups, respectively] were systematically examined and it was found that of the three, (RNC)Au-CCAr (complex C) is the choice for liquid-crystalline materials…
Blocks of Pinus koraiensis wood were degraded by Gloeophyllum trabeum and examined by solid-state 13 C NMR spectroscopy, using proton spin relaxation editing and resolution enhancement. Chemical compositions were estimated from relative signal areas. There was no evidence for preferential degradation of the noncrystal…
Empirical fitting methods have been used to develop interatomic potential parameters with which to simulate zinc sulfide. Our potentials are able to reproduce the structure and elastic constants to within a few per cent of the experimental values. In this paper we present new interatomic potentials for sulfides and th…
Mesoporous γ-alumina with uniform pore size has been prepared by selective leaching of silica from calcined kaolin minerals, 2SiO2·Al2O3·nH2O. A microtexture of very fine spine)-phase grains, consisting of γ-alumina containing several wt.% of silica, precipitating within an amorphous silica matrix, was obtained by cal…
Abstract Syndiotactic polystyrene (SPS) is a new crystalline engineering thermoplastic. With a melting point of 270 °C and its crystalline nature, SPS has high heat resistance, excellent chemical resistance and water/steam resistance. Since SPS has excellent dielectric properties, it is useful as a capacitor insulatio…
Martensitic transformation induced by extension at room temperature and its reverse transformation on heating in an Fe-14Mn-6Si-9Cr-5Ni (mass%) shape memory alloy were studied in detail by optical microscopy, electron microscopy and electron diffraction. The stress-induced transformation is initiated by random formati…
Talc added to PA-6 fire retardant with APP increases the oxygen index and upgrades the UL94 ranking to class V0. A chemical reaction of APP with talc, detected in the mixtures above 350°C, prevents volatilization of poly phosphoric acid and increases the amount of thermally stable solid residue. The inorganic phosphat…
To investigate the greatest therapeutic efficacy, we investigated the effect of scheduling on the cytotoxic interaction between hyperthermia and seven different platinum complexes in vitro and in vivo using the FSaII murine fibrosarcoma cells. Hyperthermia treatment (43 degrees C, 1 h) was administered at various time…
Phenylethynyl substituted benzenes 1, 2 and 3 are synthesized by the Pd-coupling reaction of phenylacetylene with the corresponding bromobenzene; the third-order optical non-linearity [χ(3)(ω)] increases with the participation of π-conjugation through the triple bond as determined by the degenerate four-wave mixing (D…
Leather tanning industry as a significant polluting source is exposed to stringent effluent limitations. On the other hand, leather processing has a very complex structure in terms of both production and waste streams. A systematic subcategorization approach is required to assess the pollution characteristics and cont…
The photoresponsive ditopic receptors 1a,b bearing two adenine binding sites linked by an azobenzene moiety were prepared. Photochromism, binding of mono- and bis-adenine derivatives and template effects on the coupling reaction of aminoadenosine 2 and the adenosine-derived active ester 3 were studied. Photoswitching…
The paper presents a finite element solution of periodic steady state magnetic field problems in soft materials with scalar hysteresis. The Jiles-Atherton model is employed for the generation of symmetric B-H loops and it is coupled with the Fixed Point technique for handling magnetic nonlinearities. The proposed proc…
The synthesis, structural aspects and thermal behaviour of six different magnesium alcoholates are reported. The magnesium oxides obtained by decomposition of the alkoxides show different particle morphologies, as shown by scanning electron microscopy. The mechanism of the thermal decomposition of magnesium methanolat…
Isomerically pure dimers and trimers containing, two and three triphenylene hexaether mesogenic units, respectively, have been prepared. The key step of the synthesis was an oxidative coupling of a 1,2-dialkoxybenzene and a 3,4,3′,4′-tetraalkoxybiphenyl to give an unsymmetrically substituted triphenylene. The mesophas…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational studies of molecular organization in evaporated phthalocyanine thin solid filmsR. Aroca and A. ThedchanamoorthyCite this: Chem. Mater. 1995, 7, 1, 69–74Publication Date (Print):January 1, 1995Publication History Published online1 May 2002Published inissue 1 Janua…
The intergranular (intercrystalline) corrosion (IGC) of a heat-treated aluminum (Al)-magnesium (Mg)-silicon (Si)-copper (Cu) alloy was investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM revealed that tall chimneys of corrosion product formed on the surface above the p…
In earlier studies of genetic competence in Escherichia coli induced with calcium-containing buffers, a strong correlation was found between transformation efficiency and the formation of poly-beta-hydroxybutyrate/calcium polyphosphate (PHB/Ca2+/PPi) complexes in the plasma membranes. In this study, we replaced Ca2+ w…
Article Influence of the Alkali Concentration on the Formation of Cellulose II. Study by X-Ray Diffraction and FTIR Spectroscopy was published on January 1, 1995 in the journal Holzforschung (volume 49, issue 6).