Materials Literature
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The experimental data of the ${\mathrm{Zn}}_{3}$${\mathrm{P}}_{2}$ absorption edge are analyzed for single crystals and thin films. The isotropic Kane band-structure model, with the introduction of a valence-level splitoff due to crystal-field interaction is used to calculate the absorption coefficient. The best fit t…
The lattice dynamics of pristine graphite is presented with the use of a Born---von K\'arm\'an model. With the consideration of interactions to fourth neighbor both intraplane and interplane, good agreement is simultaneously obtained with ir, Raman, and inelastic neutron scattering measurements of lattice modes and wi…
The heating rate is an important, though often neglected experimental variable in TL measurements. Lithium fluoride (TLD-100) samples have been heated at rates up to 100 degrees C s -1 during TL readout. The change in TL glow peak intensities and (Mg 2+ -V - ) dipole concentration during readout have been investigated…
The first numerical determination of the thermodynamic isotropic-nematic transition in a simple three-dimensional model fluid, viz., a system of infinitely thin hard platelets, is reported. Thermodynamic properties were studied with use of the constant-pressure Monte Carlo method; Widom's particle-insertion method was…
Polarized axial and orthoaxial luminescence spectra in the 7 Fj (J=1, 2, 3 and 4)←5 D 0 transition regions of Eu3+ in single crystals of trigonal Na3[Eu-(oxydiacetate)3]. 2NaClO4.6H2O are reported and analysed. Differential circular polarization (left-handed versus right-handed) is measured in the axial luminescence s…
The Lebwohl-Lasher model of a nematogen provides a simple system with which to study the order-disorder transition and to examine the properties of the nematic phase. We have investigated the model containing 203 particles over a small temperature range characteristic of that for real nematogens using the Monte Carlo…
This paper reports x-ray intensity analysis of the superlattice reflections associated with the order-disorder transition of di (tetramethyltetraselenafulvalenium) perrhenate [${(\mathrm{TMTSF})}_{2}$Re${\mathrm{O}}_{4}$] at ${T}_{c}\ensuremath{\simeq}180$ K. The results confirm the earlier proposed anion ordering and…
Based on the theory developed by the present authors in preceding papers, the values of the librational frequencies at the Brillouin zone center and the thermodynamic characteristics of solid N2, CO, N2O, and CO2 in the orientationally ordered phase are determined. The results obtained are compared with experimental d…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
It has been shown that isotopically labelled sheep wool wax is carried passively along the wool fibre as a band by growth of the wool, and that it does not flow along the fibre to any large extent during experiments of several months. This supports the view that the function of sebum, in mammals in general, is to prot…
We consider the steady state reaction-diffusion problem for a permeable catalytic particle with Langmuir–Hinshelwood kinetics under isothermal and quasi-isothermal conditions. It is known that there may be multiple solutions due to either strong adsorption or external thermal effects; in the first case, an arbitrarily…
To a first approximation the addition of a solute (Ti) to a solvent (Fe) results in a change of lattice parameter which varies linearly with the atomic concentration of solute. However, it has been proposed by Raynor that in a transition-metal alloy system this ideal behaviour is not necessarily obeyed. A survey of pu…
AThe present paper deals with the findings of an experimental comparison of the optical properties of cholesteric (chiral nematic) and chiral nematic) and chiral semctic phases.
Abstract A combination of different experimental apprati has allowed dynamic mechanical spectroscopic measurements to be made as function of variable, constant offset stress, as well as during creep of bisphenol‐A‐polycarbonate. The deformation system was calibrated with aluminum and by comparison of low‐stress dynami…
Gel having a Mg:Si ratio identical to that of talc (3:4) was treated hydrothermally at six temperatures between 300' c and 550' C and I kbar for times of7, 30, 50, 120 and 200 days in order to identify reaction trends. Talc crystallized first at all temperatures. It then reacted to form stevensite at temperatures betw…
Abstract Polystyrene has been modified by electrophilic substitution reaction with phthalic anhydride and pyromellitic dianhydride. The products have been characterized by physical characteristics, solubility differences, elemental analysis, infrared spectra, ion‐exchange capacity, and pH metric titration. The ultimat…
Thirteen gersdorffite (NiAsS) specimens were analyzed with electron microprobe, powder diffraction, and precession camera techniques. For each specimen, a sample with a well-developed cube form {lOO}was selected. Intensity data were collected from 27 reflections, which are mostly forbidden by cubic space group Pa3, wi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimultaneous absorption of dilute nitric oxide and sulfur dioxide into aqueous slurries of magnesium hydroxide with added iron(II)-EDTA chelateEizo Sada, Hidehiro Kumazawa, Yasushi Sawada, and Takashi KondoCite this: Ind. Eng. Chem. Process Des. Dev. 1982, 21, 4, 771–774Publ…
A state of the art review of nonsilica based infrared fibers is presented. Two types of fiber materials have been investigated--crystals and glasses. Crystal fiber work appears to be focused on development of short haul CO/sub 2/ laser power delivering lines at 10.6 µm. The maximum delivering power of the CW CO/sub 2/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison of simulated crystal size distribution control systems based on nuclei density and supersaturationRonald W. Rousseau and Thomas R. HowellCite this: Ind. Eng. Chem. Process Des. Dev. 1982, 21, 4, 606–610Publication Date (Print):October 1, 1982Publication History Pu…