Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface Exchange Kinetics of Chemically Different PolymersJ. C. Dijt, M. A. Cohen Stuart, and G. J. FleerCite this: Macromolecules 1994, 27, 12, 3229–3237Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994https://p…
The dynamic mechanical and infrared spectroscopic investigation of ionomer blends of poly-(diacety1ene)-a nd polystyrene-based ionomers has shown that miscibility of this usually incompatible polymerpair can be achieved through ion-ion interactions between the blend components. Microphase separationis prevented throug…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEvolution of Crystalline Structures of Poly(.epsilon.-caprolactone)/Polycarbonate Blends. 1. Isothermal Crystallization Kinetics As Probed by Synchrotron Small-Angle X-ray ScatteringY. Wilson Cheung, Richard S. Stein, Benjamin Chu, and Guangwei WuCite this: Macromolecules 19…
The enzyme CoA transferase (succinyl-CoA:3-ketoacid coenzyme A transferase [3-oxoacid CoA transferase], EC 2.8.3.5) is essential for the metabolism of ketone bodies in the mammalian mitochondrion. It is known that its catalytic mechanism involves the transient thioesterification of an active-site glutamate residue by…
Electrochemical Behavior of Polyaniline‐Poly(styrene sulfonate) Composite Films in Organic Electrolyte Solutions, Morita, Masayuki, Miyazaki, Seijiro, Tanoue, Hiroyuki, Ishikawa, Masashi, Matsuda, Yoshiharu
The crystal structure of kombatite, Pb,o(voo),o,clo, a : 12.682(2), b : 22.566(5), c : r r . 279 (2 ) A , B : l l s . l l ( l f , v : 2847 ( l ) [ t , 7 :4 , C2 /c , has been so l ved by d i rec t methods and refined to an R index of 9.00/o using MoKa X-ray data. There is one unique V position tetrahedrally coordinate…
High-quality sizable single crystals of the radical compound 2,4,6-triphenylverdazyl (TPV) have been prepared and their magnetic properties investigated by neutron-diffraction and magnetization measurements. Neutron-diffraction peaks corresponding to long-range antiferromagnetic ordering have been observed below the N…
A two-dimensional dynamics model for the motion of fibers in an accelerating laminar air flow is presented. Nonlinear model equations for each fiber include effects of inertia, air drag, and flexural rigidity. This rigidity, or stiffness, acts in such a way that a curled or hooked fiber resists being straightened. Ran…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation of Metal-meso-Octaethylporphyrinogen Complexes Leading to Novel Oxidized Forms of Porphyrinogen Other than Porphyrins. 1. The Redox Chemistry of Nickel(II)- and Copper(II)-meso-Octaethylporphyrinogen Complexes Occurring with the Formation and Cleavage of a Cyclopro…
Cluster models of increasing complexity have been used to model magnetic interactions in KNiF3. These clusters contain two or four magnetic centers plus the bridge F− anions and different representations of the remaining of the crystal. The magnetic coupling constant has been obtained by computing ab initio wave funct…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonte Carlo Simulation of Polymer Network Formation with Complex Chemical Reaction Mechanism: Kinetic Approach on Curing of Epoxides with AminesKuo-Chung Cheng and Wen-Yen ChiuCite this: Macromolecules 1994, 27, 12, 3406–3414Publication Date (Print):June 1, 1994Publication H…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyrene Sorption in Organic-Layered Double-Metal HydroxidesPrabir K. Dutta and Daniel S. RobinsCite this: Langmuir 1994, 10, 6, 1851–1856Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994https://pubs.acs.org/doi/10…
The optical absorption coefficient at room temperature has been measured for cerium-doped Y2O3 and Y1.4Gd0.6O3 samples from 1500 to 45000 wave numbers. Diffuse reflectivity has been measured on cerium-doped powders of Y2O3, Lu2O3, Sc2O3, Ba2GdTaO6, and ThO2 over the same range. A number of 4f − 4f and 4f − 5d transiti…
Abstract The rocks of the palygorskite deposit at Bercimuel (Segovia, Spain) have been studied by transmission electron microscopy and microanalysis. These rocks correspond to the zone of convergence of two alluvial fan systems that have filled the small basin of the River Riaza and would originally have been composed…
A method based on use of ion exchange resin capsules was evaluated for simultaneous extraction of plant available nutrients (N, P, K, Ca, Mg, and Na) to determine its utility as a general soil testing procedure for soils of world‐wide origin. Nutrient release kinetics of soils representing many soil orders were measur…
Nonlinear optical polymers contain molecular dipoles with very large hyperpolarizabilities in a glassy polymer matrix. Two typical examples—a guest-host system with dispersed polar dye molecules and a side-chain material with chemically attached molecular dipoles—were investigated by means of poling experiments, diele…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemically Polymerized Terthiophene Derivatives Carrying Aromatic SubstituentsCsaba Visy, Jukka Lukkari, and Jouko KankareCite this: Macromolecules 1994, 27, 12, 3322–3329Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inis…
The development of stresses in the scale during the high-temperature oxidation of metals can have important consequences for the long-term protection of components in service, particularly if this leads to scale failure, allowing access of the environment to the metal surface. Such stresses may result from externally…
films have been prepared by radio frequency (RF) magnetron sputtering at various total pressure, RF power, and substrate temperatures. Microstructure and crystallographic orientation were characterized by x‐ray diffraction. Surface morphologies were observed by scanning electron microscope. In addition, cathodolumines…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChirochromism-Photochromism by Epimerization: Search for a Liquid Crystal PhototriggerMingbao Zhang and Gary B. SchusterCite this: J. Am. Chem. Soc. 1994, 116, 11, 4852–4857Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1…