Materials Literature
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By means of the approximate renormalization approach of Niu and Nori [Phys. Rev. Lett. 57, 2057 (1986)] the widths of subband segments in the spectrum and the occupation probabilities on subbands are obtained to the lowest order for the two-value Fibonacci chains. The global scaling properties of the spectrum are then…
The development of laser glass is reviewed. The fluorescence and laser effect of numerous glass compositions have been investigated over the past 20 years, but the industrial applications are few compared to the volume of research: only 20 to 30 glass types are available commercially today. Phosphate glasses are in th…
The intracellular concentrations of the polypeptides encoded by the two enolase (ENO1 and ENO2) and three glyceraldehyde-3-phosphate dehydrogenase (TDH1, TDH2, and TDH3) genes were coordinately reduced more than 20-fold in a Saccharomyces cerevisiae strain carrying the gcr1-1 mutation. The steady-state concentration o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of a [1,5,1,5]platyrin, a 26.pi.-electron tetrapyrrolic annuleneE. LeGoff and O. G. WeaverCite this: J. Org. Chem. 1987, 52, 4, 710–711Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published inissue 1 February 1987https://pu…
Nonequilibrium molecular dynamics simulations of planar Couette flow have been performed for dense liquids composed of model linear chain molecules each containing six interaction centers. For one liquid the potential parameters were chosen so that it resembles n-hexane. For the other liquid, referred to as flexane, t…
A high charging‐discharging efficiency was obtained for battery, when a PPy film formed in by electropolymerization was used in a electrolyte after anion undoping. The anion doping‐undoping process for the PPy film electrodes was examined with the usual electrochemical techniques. A cell was also tested with a constan…
The optical characteristics of the major progressive addition lenses were measured using an automated lensometer with a specially designed lens holder to simulate eye rotation. Measurements were made every 3 degrees (about 1.5 mm) and graphs of isospherical equivalent lines and isocylinder lines were developed. Genera…
We present mechanisms for sidebranch generation in dendritic growth, stressing the importance of nonlinear effects. One such mechanism, which we call solvability-induced sidebranching, relies on the fact that the steady states form a discrete family. In addition, time-dependent simulations of crystal growth in the bou…
The Cu4Cd 3 structure, cubic with a = 25.87/k and 1124 atoms in the unit cell, has been analyzed and described in terms of octahedra and tetrahedra. The structure is described as an intergrowth of blocks of the pyrochlore structure, of the Cu metal structure and also of the MgZn 2 and MgCu2 structures. Parameters of t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAvermectin chemistry: problems of conjugation, deconjugation, and epimerizationBert Fraser-Reid, Heinz Wolleb, Ramine Faghih, and Joseph Barchi Jr.Cite this: J. Am. Chem. Soc. 1987, 109, 3, 933–935Publication Date (Print):February 1, 1987Publication History Published online1…
We prepared ultrafine germanium particles by gas-evaporation techniques. The particle composition was studied by Raman and x-ray scattering. We take an analytical model to explain the Raman profile: the particle is composed of a single-crystalline core and a coating amorphous shell. In this single-crystalline part, th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of iodide ions in iodinated nylon 6 and the evolution of hydrogen bonds between parallel chains in nylon 6N. S. MurthyCite this: Macromolecules 1987, 20, 2, 309–316Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published inis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanism of the catalyzed epoxidation of oleic acid with oxygen in the presence of benzaldehydeMing Chao Kuo and Tse Chuan ChouCite this: Ind. Eng. Chem. Res. 1987, 26, 2, 277–284Publication Date (Print):February 1, 1987Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon-29 chemical shifts in sodalite materialsJ. M. NewsamCite this: J. Phys. Chem. 1987, 91, 5, 1259–1262Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published inissue 1 February 1987https://pubs.acs.org/doi/10.1021/j100289a044htt…
Reliability analysis should enable an engineer to select an allowable stress that will permit a ceramic component to function of the expected lifetime with an acceptably low probability of failure. Three approaches have been used to assure the reliability of ceramics: designing probablistic, nondestructive evaluation…
Abstract Über Röntgen‐ und Neutronenbeugungsexperimente an pulverförmigen Proben wurde die Kristallstruktur von BaH 2 bzw. BaD 2 neu bestimmt. Sie entspricht der des Calciumdeuterids [1, 2] und zeigt, daß die seinerzeit von Zintl und Harder [3] angenommenen Wasserstoffpositionen nicht zutreffen. Die Einordnung des Bar…
Abstract Experimental studies on the solid‐state polymerization (SSP) of polyethylene terephthalate (PET) for the particle sizes of 14–16 mesh at 170–200°C and for the particle sizes of 14–18 mesh at 210–240°C are carried out under a vacuum of about 60 mtorr. Analysis of the data of the concentrations of hydroxyl and…
A self-consistent macroscopic thermodynamics is developed for the calculation of work, heat, and dissipation for thermodynamic paths of the shape memory alloy, Nitinol. The thermodynamic system analyzed is a Nitinol helix for which extensive force–length–temperature (FLT) equation of state measurements have been made.…
Abstract Blends of various poly(aryl ether ketones) have been found to exhibit a range of miscibility and isomorphic behavior. This range is dependent on molecular weight; however, for poly(aryl ether ketones) with number‐average molecular weight of 20,000, this range is about ±25% difference in ketone content. All mi…
This paper presents practical knowledge about dissolving and spinning cellulose in the NMMO-H 2 O system described in the Kodak and Akzona patents. From the highly hydrated NMMO commercialized by Texaco and a viscose pulp with an average polymerization degree of 700, we made true solutions in two stages: swelling of t…