Materials Literature
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The effect of thermal treatment on the microporous accessibility of an aluminium pillared clay has been investigated. When the calcination temperature was increased up to 673 K, the specific total (or micropore) surface areas increased, but a further increase in the calcination temperature produced a decrease in the s…
Some currently-available formulations of LaRC™-TPI, a thermoplastic polyimide originally developed at NASA-Langley, were found to be highly susceptible to environmental stress cracking when exposed to solvents such as acetone, toluene, diglyme and methyl ethyl ketone. The combination of stress and solvent led to rapid…
The title compound 3 is readily available from 1, 3, 5-triacetylbenzene in a three-step procedure and is an efficient trifunctional core reagent for the synthesis of dendrimers.
The inhibitory effects of chitosan on germination and production of zoospore, and growth of vegetative hyphae of Saprolegnia parasitica Coker were examined. Zoospore germination was completely inhibited by chitosan at the concentration of 0.06%. Mycelial growth was not observed on GY media containing 0.05% chitosan. Z…
New organo-mineral nanocomposites are prepared by reacting ethylene glycol and other diols with the interlemellar silanol groups of the layered silicic acid, H-magadiite, to afford organically pillared layered silicates.
Cathodic polarization of aluminum in acid solution produces a surface film which was studied using infrared reflectance spectroscopy (IRS), and quartz crystal microbalance (QCM), and capacitance measurements. According to the QCM results, deposition of the film began after passage of 7.2 mC/cm 2 of cathodic charge at…
Basics: Ultrasound. Electromagnetics. X-Rays. Others. Methods: Materials Sorting. Microstructure. Macrostructure. Residual Stresses. Materials Properties. Applications: On LIne. Off Line. References. Index.
Fluorescence analysis (FA) is demonstrated to be a very sensitive analytical tool to monitor the quality of thermally processed polymer encapsulants such as EVA. Generation of UV‐excitable chromophores during curing is shown to arise from the presence of the oxidative curing agent, Lupersol peroxide, in the EVA formul…
The binary antimonide compounds of the skutterudite family have a good potential for thermoelectric applications as recent results at the Jet Propulsion Laboratory (JPL) have shown. However, the room temperature thermal conductivity of these materials is about 10 Wm−1K−1 with an estimated 80% contribution from the lat…
In order to estimate surface tension for multicomponent silicate melts, expanded approximation rules was proposed in view of practical use, on the basis of the regular solution approximation rules of excess molar quantities for binary system melts. Necessary parameters for the above rules have been derived using the p…
Studies were conducted to determine the mechanism of blood pressure- and cholesterol-lowering effects of funoran on rats fed with a saline solution and cholesterol diet. Clofibrate (COIB) was used as a reference hypolipidemic drug. Funoran caused significant reduction of systolic blood pressure (SBP). Funoran and CPIB…
In our earlier work, we developed a model for fibrous assemblies by treating each yarn as a true three-dimensional structure. We then were able to predict various orientation limits by manipulating the model until geometric self-intersection would occur. However, that model treated the yarns as inextensible and incomp…
Two shallow O- trapped hole centers in BaTiO3 are identified to arise from association with Na+ and Ptx+. In material with decreased acceptor concentration, ESR of Ti3+ small polarons and Ti3+-Nb5+ pairs is found. The role of such centers in light induced charge transfer and photochromism is studied.
Oxygen-deficient ZnII-bearing ferrites (ZnxFe3 –xO4 –δ, 0 ⩽x⩽ 1, δ > 0) have been synthesized and studied for their reactivity in the decomposition of CO2 to carbon at 300 °C. They were prepared by reducing ZnII-bearing ferrites with H2 gas at 300 °C. The oxygen-deficient ZnII-bearing ferrites consisted of a single ph…
For the first time a synthesis of unsubstituted furoxan, the first member of the furoxan series, has been accomplished.
Abstract
The standard theory of magnetocrystalline anisotropy for a rigid ferromagnetic body, with cubic symmetry, makes use of a “zero strain” anisotropy constant K 1 . If the effect of magnetostriction is taken into account, this constant must be replaced by a “zero stress” anisotropy constant K′ 1 which differs from K 1 by…
This book provides an overview of the immobilization of viable and non-viable cells, proteins, enzymes and active molecules, and their interaction with natural or synthetic carriers for performing bio
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTropothione S-Oxide: The First Example of a Sulfine Charge Reversion (Umpolung)Takahisa Machiguchi, Toshio Hasegawa, Hiroyuki Otani, Shinichi Yamabe, and Hiroshi MizunoCite this: J. Am. Chem. Soc. 1994, 116, 1, 407–408Publication Date (Print):January 1, 1994Publication Histo…
Article Heat Transfer in Hydride Packed Beds. II. A New Experimental Technique and Results on LaNi5 Powder* was published on January 1, 1994 in the journal Zeitschrift für Physikalische Chemie (volume 183, issue 1-2).