Materials Literature
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Disodium cromoglycate in water (~10-15% by weight) forms a nematic liquid crystalline phase of negative diamagnetic anisotropy which readily orients in a magnetic field. The phase transition temperatures are very sensitive to the nature and concentration of the cationic species. Addition of chiral guest molecules, and…
A survey of the spectral, electrochemical, and chemical properties of organic and inorganic 2,2′-bipyridine (bpy) radical derivatives leads to the conclusion that these species form a common family whose properties are largely determined by those of bpy, the one-electron reduction product of bpy.
The low-temperature heat capacity of the superconducting ${\mathrm{LaS}}_{x}$ ($1.333<~x<~1.500$) compounds with the ${\mathrm{Th}}_{3}$${\mathrm{P}}_{4}$-type structure were measured from 1.3 to 20.0 K in magnetic fields of 0, 2.50, 5.39, 7.62, and 9.98 T. The compositional variation of the electronic specific-…
The aim of this paper is to review our present knowledge of the physics of electrical coronas and their interaction with surfaces, with some emphasis on phenomena which seem of importance for high voltage insulation. We will concentrate on fundamental and general subjects, in order to limit the scope of the paper and…
Abstract Imogolites in which a part or all of Si was substituted with Ge were synthesized from solutions containing aluminum ion and silicic and/or germanic acid. The products were similar to natural imogolite in their tubular morphology, electron diffraction patterns, and differential thermal analysis curves. However…
The magneto-volume effect of the weak itinerant ferromagnet MnSi has been studied by measuring both the thermal expansion over a wide range of temperature and the forced volume megnetostriction at different temperatures. The forced magnetostriction at 4.2 K as well as the magnetic thermal expansion at 10 kOe, Δω m ( H…
Insulator surfaces in gases collect charge when the rate of charge arrival exceeds the rate of conduction by the insulator from the surface region. The source of the collected charge may be in close proximity to, and hence greatly influenced by, the surface. Alternately, the source may be remote so that it releases ch…
Abstract The mechanism of low‐temperature relaxations in bisphenol‐A‐type epoxide resins cured with aliphatic diamines, with aliphatic diamines in the presence of salicylic acid as an accelerator, and with tertiary amines was investigated to compare the dynamic mechanical properties and the chemical structure of these…
Both the spectral dependence and the magnitude of the excitation spectra of surface-enhanced Raman scattering are found to be quantitatively related to the absorption spectra for silver-island films. This relationship is maintained even when the local electromagnetic enhancement at the islands is varied by coating the…
There are four distinct types of fracture in superplastic materials: failure by quasistable plastic flow, failure by necking, cavitation failure, and quasibrittle failure. The characteristics of these four types are described with reference to experimental examples. Maximum elongation occurs in a superplastic material…
The heat capacity of polystyrene from 0 K to 600 K is reviewed on the basis of measurements on 29 samples reported in the literature. A set of recommended data for amorphous polystyrene is derived. The effect of tacticity on the heat capacity is also evaluated. Entropy and enthalpy functions are calculated. This paper…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible titanium(3+) formation by hydrogen adsorption on M/anatase (TiO2) catalystsJ. C. Conesa and J. SoriaCite this: J. Phys. Chem. 1982, 86, 8, 1392–1395Publication Date (Print):April 1, 1982Publication History Published online1 May 2002Published inissue 1 April 1982ht…
Results of a molecular-dynamics computer simulation of the solid-fluid transition in two dimensions for a system of 780 particles interacting with a purely repulsive ${r}^{\ensuremath{-}12}$ pair potential are presented. The pressure as a function of density along the $T=1$ isotherm has a narrow nonmonotonic region wi…
The factors contributing to the large overpotential with respect to flatband potential required for hydrogen evolution and certain redox reactions at illuminated p‐type electrodes of various III–V compounds have been investigated. Results of photoelectrochemical studies, involving minority carrier transfer to redox sy…
The Cambridge Crystallography Subroutine Library (CCSL) is a versatile set of subroutines which will have many different applications for non-standard crystallography. At present it is used extensively at the Institut Laue–Langevin for interpreting all polarized neutron measurements, proceeding from the raw flipping-r…
The theoretical sensitivity of conventional partial discharge detectors is compared with that obtained from ultra wideband (UWB) (up to l GHz) detection systems. The comparison indicates that for relatively lossfree distributed systems, such as SF6 insulated bus, the UWB system is up to two orders of magnitude more se…
Escherichia coli strain MM18 cells containing malE-lacZ hybrid protein was reported to accumulate prolipoprotein when they were induced with maltose [Ito, K., Bassford, P. J. & Beckwith, J. (1981) Cell 24, 707-717]. We have shown that the prolipoprotein accumulated in maltose-induced MM18 cells is not modified, lackin…
This paper reviews the MCVD process, with special emphasis on fiber design and material choices, understanding of mechanisms involved in the process, process improvements, and performance.
The basic principles of electron backscattering from atoms and solids in the energy range 10 to 100 keV are reviewed. The total backscattering from thin self-supporting films, from bulk solids, and from thin surface films on supporting bulk solids is discussed as well as the angular distribution of the backscattered e…
An extended Jones matrix method is derived for treating the transmission of off-axis light through birefringent networks. Neglecting multiple reflections, this matrix algebra includes the effect of Fresnel reflection and refraction at the crystal-plate surfaces.