Materials Literature
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Abstract The main properties of a new thermoluminescent (TL) material (LiF:Cu,Mg,P) produced in the People's Republic of China under the name of GR-200A have been already investigated by others. The purpose of this work is to establish a standardised procedure for use. Careful experiments were carried out with the aim…
Diffusion of impurities against the direction of gas flow can be a significant source of contamination in the ultrapure gas systems. The mechanism and the kinetics of impurity transport due to back‐diffusion is studied both experimentally and theoretically. A model is developed to simulate the process and calculate th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransport coefficients of oligo- and poly(dimethylsiloxanes) in dilute solutions. The draining effectTakeshi Yamada, Hitoshi Koyama, Takenao Yoshizaki, Yoshiyuki Einaga, and Hiromi YamakawaCite this: Macromolecules 1993, 26, 10, 2566–2574Publication Date (Print):May 1, 1993P…
Abstract 1,5‐Naphthalenediol was alkoxylated with 1‐alkyl bromides containing 3‐16 C‐atoms and then acylated with 4‐fluorobenzoyl chloride under Friedel‐Crafts conditions in 4‐ and 8‐position of the naphthalene ring. These new difluorides ( 3a–d ) were condensated with hydroquinone, bisphenol‐A and 4,4′‐biphenyldiol,…
FT-IR was used to characterize the surfaces of Al after various chemical treatments. All of the oxide surfaces were composed of an anhydrous alumina, aluminum oxyhydroxide (pseudoboehmite) and aluminum hydroxide (close to Gibbsite). The major contaminants in the different oxides are chemisorbed CO2, carbonates and bi-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethanol-formic acid esterification equilibrium in sulfuric acid solutions: influence of sodium saltsBhart Indu, William R. Ernst, and Leslie T. GelbaumCite this: Ind. Eng. Chem. Res. 1993, 32, 5, 981–985Publication Date (Print):May 1, 1993Publication History Published onlin…
CaAI4 undergoes a reversible, structural transformation at 170 °C according to high-temperature X-ray powder diffraction experiments. The high-temperature phase adopts the tetragonal BaAI4 structure (space group I4jmmm), while the low-temperature phase is monoclinic, C2jm, with lattice parameters, a = 6.1526 (15) A, b…
Cross sections for the photoionization of the argon 3s electron are presented from threshold up to 100 eV. In order to cover this whole energy range with comparable accuracy, we used two complementary methods: absolute measurements by photon-induced fluorescence spectroscopy (PIFS) and relative measurements by time-of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA green heteropoly blue: isolation of a stable, odd oxidation level in a Dawson molybdate anion, [S2Mo18O62]5-John B. Cooper, David M. Way, Alan M. Bond, and Anthony G. WeddCite this: Inorg. Chem. 1993, 32, 11, 2416–2420Publication Date (Print):May 1, 1993Publication History…
Fabric drape is an important parameter for the aesthetic appearance of fabrics. It can be measured using Cusick's drape meter, where the drape coefficent is obtained with a laborious cut‐and‐weigh method. Presents a method using image analysis for measuring the drape coefficient. With this method, time dependence of t…
An atomic structure model of the decagonal AlCuCo quasicrystal is proposed. The matching rules recently found by R. Klitzing et al. [Int. J. Mod. Phys. B (to be published)] for an abstract triangle tiling are enforced by specific Cu (Co) ordering, reducing the symmetry to P${10}_{5}$/m. The model renders very simple K…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh temperature mass spectrometric studies of the bond energies of gas-phase zinc oxide, nickel oxide, and copper(II) oxideLyn R. Watson, Terry L. Thiem, Rainer A. Dressler, Richard H. Salter, and Edmond MuradCite this: J. Phys. Chem. 1993, 97, 21, 5577–5580Publication Date…
The synthesis and the structure of silicon carbide‐silicon nitride (SiC─Si 3 N 4 ) composite ultrafine particles have been studied. SiC─Si 3 N 4 composite ultrafine particles were prepared by irradiating a SiH 4 , C 2 H 4 , and NH 3 gas mixture with a CO 2 laser at atmospheric pressure. The composition of composite po…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign, synthesis, and partial characterization of water-soluble .beta.-sheets stabilized by a dibenzofuran-based amino acidHumberto Diaz, Kwok Yin Tsang, Danny Choo, Jose R. Espina, and Jeffery W. KellyCite this: J. Am. Chem. Soc. 1993, 115, 9, 3790–3791Publication Date (Pr…
Extractants employed for routine soil analysis vary from one laboratory to another. Lack of a universal soil extractant is a serious limitation for interpretation of analytical results from various laboratories on nutritional status of a given soil. This limitation can be overcome by developing functional relationship…
The formation of transparent conducting CdO films by chemical bath deposition is reported for the first time. These films exhibit an optical transmittance and electrical conductivity much higher than those CdO films prepared by other physical vapour deposition techniques. They exhibit an optical transmittance of more…
A fully automated magnetron-sputtering system for the deposition of complicated optical multilayer structures is described. The process control includes the real-time determination of the deposited layer thicknesses and adjustment of the remaining layer thicknesses to reoptimize the final performance of the multilayer…
The effects of alloying elements such as niobium, copper, chromium, molybdenum, and titanium in high-strength, low-alloy (HSLA) steels on hydrogen induced cracking (HIC) were investigated. The HIC test was performed to NACE TM-02-84 in BP (saturated H2S synthetic sea water) and NACE solutions. The test data were analy…
The use of naturally functionalized triglyceride oils in interpenetrating polymer networks (IPNs) is reviewed. An oil bearing either hydroxyl or epoxide functionality may be crosslinked to form a soft elastomer in the presence of another monomer or network to form an IPN, or in the presence of a linear polymer, to for…
The structures of 51 elemental liquids have been modelled from experimental diffraction data using the reverse Monte Carlo method. The structural trends across the periodic table are described in terms of three-body correlations and discussed in terms of the relative importance of two-body and many-body forces.