Materials Literature
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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).
Abstract The reaction between BiI 3 and two equivalents of dmpu (dmpu = N,N′‐dimethylpropylene urea) in thf (tetrahydrofuran) or toluene affords dark red crystals of the complex [Bi(dmpu) 6 ][Bi 3 I 12 ] which was characterised by X‐ray crystallography and consists of octahedral [Bi(dmpu) 6 ] 3+ cations and [Bi 3 I 12…
The experimental phase diagram between the plastic crystals neopentyl glycol (NPG) and tris(hydroxymethyl)aminomethane (TRIS) has been established. The importance of the use of complementary techniques with different timescales in order to obtain the most realistic phase diagram is underlined. The miscibility is discu…
A neural network system, utilizing the multi-layer perceptron approach has been applied to distinguish between power cable insulation partial discharge pulse shapes that are characteristic of cavities and electrical trees. The neural network was found to be capable of recognizing the differences in PD pulses produced…
Silica is an important industrial chemical but the mechanisms involved in its formation from aqueous precursors remain far from well understood. In this study we have prepared a range of silicon catecholate salts where M+ is Li+, Na+, K+, NH4+, Et3NH+ and followed complex breakdown and silica oligomerisation under app…
P. R. Unwin and J. V. Macpherson, Chem. Soc. Rev., 1995, 24, 109 DOI: 10.1039/CS9952400109
Polylactide (PLA) microspheres containing ovalbumin (OVA) as a model protein were prepared by a water-in-oil-in-water (w/o/w) emulsion solvent evaporation method. The optimization of preparative parameters for the PLA microspheres containing OVA were performed, and the in vitro characteristics of the obtained microsph…
In this paper a comparative study is presented of four hysteresis models with regard to the numerical computation of the fields inside soft magnetic laminations. Addressed topics include parameter identification and precision. All computed results are compared with measurements.
Manganiferous rock varnish collected from Death Valley and Antarctica contains the smallest known terrestrial sedimentary deposits, with some layers only a few nanometers thick. Irregularities in these nanometer-scale layers are consistent with shrinking, cracking, and weathering of clay minerals. In the Death Valley…
Four new binucleating symmetric bis(4-pyridine-2,6-dicarboxylic acids) have been synthesized and luminescence enhancement of their EuIII complexes by YIII ions observed. The results indicate that the mechanism of enhancement is based on the formation of a polymeric structure where EuIII ions and YIII ions are linked t…
Various procedures for designing basis sets to be used in the computation of high-quality wave functions have been considered. The most satisfactory results for the polarizability and hyperpolarizabilities of He, H2, Be, Ne, F−, and HF were obtained using the core basis sets of van Duijneveldt, augmented by 7f1(l+1)5f…
The TS-1/H2O2 system efficiently catalyses the hydroxy-assisted chemoselective epoxidation of α-hydroxyalkene in geraniol, and the stereoselective epoxidation of cyclopent-2-en-1-ol/cyclohex-2-en-1-ol producing the epoxide which is cis to OH with high selectivity (90:10 cis: trans).
A simple gedanken experiment is presented to demonstrate the violation of charge (and energy) conservation, as predicted by D.E. Ward (1981), J.J. Paulos and D.A. Antoniadis (1983), and D. Root and B. Hughes (1988), in the two-parameter nonlinear modeling of capacitance. The paradoxes are resolved through examination…
Samples of the spinel series, MnxFe3 –xO4(O ⩽x⩽ 3), have been synthesized by the hydroxide coprecipitation technique and characterised by chemical analysis; XRD and SEM techniques, and measurements of their BET specific surface areas, saturation magnetisations and electrical resistivities. The specimens with values of…
Abstract
The design of anti-friction coatings able to perform well in different wear conditions without lubricants requires a combination of adequate hardness and toughness, good adhesion, a low friction coefficient and a low wear rate. Recently introduced metal-diamond-like carbon (DLC) coatings can be a major step towards th…
Complexes formed between 4-alkoxystilbazoles and 3-cyanophenol show liquid crystal mesophases. Compared to the mesomorphism of similar complexes formed between stilbazoles and 4-cyanophenol, the mesophases are more stable and are enantiotropic.