Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochromic Polysulfones. 1. Synthesis of Polymeric Polysulfone Carrying Pendant Spiropyran and Spirooxazine GroupsAbraham Warshawsky, Nava Kahana, Frida Buchholtz, Alex Zelichonok, Judith Ratner, and Valeri KrongauzCite this: Ind. Eng. Chem. Res. 1995, 34, 8, 2825–2832Publ…
Abstract The promoting effects of 2,4‐ionene on the cobalt(II) phthalocyaninetetracarboxylic acid‐[CoPc(COOH) 4 ] and cobalt(II) phthalocyanineoctacarboxylic acid‐[CoPc(COOH) 8 ] cata‐lyzed autoxidation of 2‐mercaptoethanol were studied. Dimerization of the CoPc(COOH) 4 catalyst, combined with the disappearance of the…
A new method of measuring the viscosity of liquid, which is named the double-wire torsion pendulum method in contrast to the conventional torsion pendulum method, is described in this paper. It was found that the damping factor αl changes nearly linearly with the kinematical viscosity η/ρ of the standard oil in the ra…
The mechanism of oxygen transport in the bulk silicon melt with and without crystal pulling were investigated experimentally and computationally. Crucible rotation rates were chosen as a parameter, and results suggest that rotation suppresses transport of oxygen from the crucible wall to the crystal growth interface,…
Abstract The conductivity change of a vacuum deposited V2O5 thin film during lithium intercalation/deintercalation was investigated using an interdigitated microarray electrode. The conductivity-potential profile showed two peaks (ca. 1.7 × 10−3 S cm−1) at 3.23 V and 3.41 V vs. Li/Li+, corresponding to the peaks in th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModeling and Simulation of Carbon Mask Adsorptive ReactorsRui C. Soares, Jose M. Loureiro, Carlos Sereno, and Alirio E. RodriguesCite this: Ind. Eng. Chem. Res. 1995, 34, 8, 2762–2768Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Publish…
Properties of the functional polymers prepared from functional monomers and those into which the active groups were introduced by a suitable polymer-analog reaction could differ substantially, especially in the active group distribution.In this paper are analyzed specific properties of functional polymers prepared by…
Benzylation of benzo[b]thiophene (1) with benzyl chloride catalyzed by metal-doped K-10 montmoril-lonite clays is described. Whereas ZnQ2 dissolved in either nitromethane or nitrobenzene solution promoted benzylation of (1) only very slowly and resulted in a mixture of mono- and poly-substituted products, ZnCl2-modifi…
Abstract The electrochemical behavior and surface chemistry of sputter‐deposited non‐equilibrium stainless Al–Ta alloys have been investigated. These alloys exhibit enhanced passivity over a pH range of 2–12 even though the passive film chemistry varies considerably over this range. This enhanced passivity can be expl…
Abstract Porphyrin oligomers (Pn, n = 2, 3, 4, 5) were prepared by the nucleophilic substitution of amino porphyrin monomers to cyanuric chloride. In this method, two different porphyrins can be joined stepwise to 1,3,5-triazine ring in one-pot by choosing appropriate reaction temperatures. The reaction proceeded unde…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical Prediction of the Optical Waveguiding Properties of Self-Assembled Block Copolymer FilmsJ. T. Chen, E. L. Thomas, C. G. Zimba, and J. F. RaboltCite this: Macromolecules 1995, 28, 17, 5811–5818Publication Date (Print):August 1, 1995Publication History Published on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTParadigms and Paradoxes in Modeling Adsorption and Chromatographic SeparationsDaniel TondeurCite this: Ind. Eng. Chem. Res. 1995, 34, 8, 2782–2788Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August 1995https://pubs.…
Comparou-se as características químicas, físicas e mineralógicas de Latossolos Roxos desenvolvidos de rocha alcalina (LRe) e de rocha eruptiva básica (LRd), da região de Jaboticabal, SP. Os resultados indicaram que o LRe apresenta-se num estádio de desenvolvimento, comparativamente, menos evoluído que o LRd, enquanto…
Single crystals of KMnPO 4 grown in a KCl flux show ferroelastic domains. The structure was determined on an optically controlled single domain crystal by X-ray diffraction methods. The cell is triclinic with dimensions a = 5.4813(5), b = 8.627(1), c = 8.887(1), in Å, α = 87.73(1)°, β = 89.10(1)°, γ = 88.01(1)°, Vᴍ =…
Abstract The fraction <20 μ m of a bentonitic material was selected to study the transformation of smectite into illite under hydrothermal conditions. Powder XRD showed that the studied material was composed of 97% dioctahedral smectite and 3% of quartz, cristobalite and plagioclase. The XRD analysis of the oriente…
A novel gene, roaA (ribosomal operon-associated gene), encoding a potential RNA-binding protein has been identified in the rpl23 ribosomal protein operon of the Euglena gracilis chloroplast genome. The roaA gene is interrupted by one group III and three group II introns. Introns 1 and 2 of roaA can be interpreted as a…
Abstract Fluorescence of several new polyimides in which neighboring imides are linked by a N‐N bond was examined in chloroform solutions. For the naphthalene‐containing polyimide 1 , analysis of the emission, excitation, and absorption spectra at different concentrations showed the existence of a ground‐state intermo…
We have studied morphological changes of an interface in a strong electric field which is normal to the initially planar interface. Electromigration along the interface in a two phase metallic system A-B of the immiscible components has been considered. The stresses arising during electromigration of the components we…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModification of Crystallization Properties of Poly(ethylene terephthalate) by Copolymerization with Arylate Units. 1. Preparation and Isothermal Crystallization of 4,4'-Biphenol-Containing CopolymersYoshimitsu Sakaguchi, Masami Okamoto, and Itsuro TanakaCite this: Macromolec…
A detector has been devised able to measure with high resolution the primary ionisation yield in tissue-equivalent gas volumes of a few nanometres equivalent length. The sensitive ionisation volume is a wall-less millimetric region defined by a properly shaped electric field. Free electrons creased by the radiation in…