Materials Literature
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Failure waves have been recently observed in glass plates and rods struck by high‐speed projectiles. These waves propagate into material that has been prestressed by a compressive shock. The wave propagation speed exceeds the maximum crack speed and is not constant. Behind the failure wave there is a total loss of ten…
Recent controversial issues in charge transport in molecular solids are discussed, with focus on the effects of static and dynamic disorder. The situation in ordered solids such as aromatic hydrocarbon crystals is reviewed with attention to the nature of charge carriers, and the theoretical development that led to the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of ultraviolet and electron bonding of perfluoropolyethersG. H. Vurens, C. S. Gudeman, L. J. Lin, and J. S. FosterCite this: Langmuir 1992, 8, 4, 1165–1169Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Published inissue 1 April…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison and analysis of intrinsic kinetics and effectiveness factors for the catalytic reduction of nitrogen oxide (NO) with ammonia in the presence of oxygenJohn MarangozisCite this: Ind. Eng. Chem. Res. 1992, 31, 4, 987–994Publication Date (Print):April 1, 1992Publicati…
An approach for analysing neutron and X-ray specular reflectivity data from stratified media having variation in the scattering-length density near the surface is described. The method has its origin in small-angle scattering and it is composed of two steps: (i) indirect Fourier transformation [Glatter (1977). J. Appl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntermediate liquid crystalline phases in the binary system C16TACl-H2O: an NMR and low-angle x-ray diffraction studyUlf Henriksson, Eunice S. Blackmore, Gordon J. T. Tiddy, and Olle SoedermanCite this: J. Phys. Chem. 1992, 96, 9, 3894–3902Publication Date (Print):April 1, 1…
The single-crystal X-ray diffractometer installed at the PWA Laboratory in Frascati is described. The Huber four-circle goniometer is controlled by an IBM-compatible personal computer by means of a plug-in board interface based on the LSI chip Am9513. The program CS running under MS-DOS performs a wide variety of oper…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization mechanism and physicochemical properties of electrochemically prepared polyindole tetrafluoroborateKyung Moon Choi, Chung Yub Kim, and Keu Hong KimCite this: J. Phys. Chem. 1992, 96, 9, 3782–3788Publication Date (Print):April 1, 1992Publication History Publish…
Variable light‐transmission electrochromic devices based on the complimentary mixture of polyaniline and ferric ferrcyanide (prussian blue) are presented. Various configurations for th devices are discussed and the factors which can be manipulated in order to increase the efficiency of the devices are considered.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe first nickel(II) alternating chain with two different end-to-end azido bridgesRamon Vicente, Albert Escuer, Joan Ribas, and Xavier SolansCite this: Inorg. Chem. 1992, 31, 9, 1726–1728Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResonance Raman characterization of polarons and bipolarons in sodium-doped poly(p-phenylenevinylene)Akira Sakamoto, Yukio Furukawa, and Mitsuo TasumiCite this: J. Phys. Chem. 1992, 96, 9, 3870–3874Publication Date (Print):April 1, 1992Publication History Published online1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThird-order nonlinear optical properties of conjugated rigid-rod polyquinolinesAshwini K. Agrawal, Samson A. Jenekhe, Herman Vanherzeele, and Jeffrey S. MethCite this: J. Phys. Chem. 1992, 96, 7, 2837–2843Publication Date (Print):April 1, 1992Publication History Published on…
Ferromagnetic interaction among the spins in poly(m-aniline) has been suggested by electron spin resonance and magnetic susceptibility measured at low temperatures. From the g-value analysis, these spins are found to be located on nitrogens although they are in some degree delocalized on phenyl rings. Doping of this p…
The surface of an optically transparent electrode has been modified with colloidal particles of ZnO and CdS. Chlorophyll a electrodeposited on these modified electrode surfaces is capable of injecting electrons from its excited state into the conduction band of the semiconductor. The role of the coupled semiconductor…
Abstract The grafting of maleic anhydride (MAH) on high density polyethylene in a counter‐rotating twin screw extruder has been studied. As the reaction kinetics appear to be affected by mass transfer, good micro mixing in the extruder is important. Due to the competing mechanisms of increasing mixing and decreasing r…
The dielectric response of thin films of perovskite ferroelectrics fabricated on electrodes such as indium tin oxide is calculated as a function of frequency, film & barrier layer thickness, and dielectric constant using an equivalent circuit model based on properties of the bulk, the electrode and a series resistance…
UDP-galactose 4-epimerase catalyzes the conversion of UDP-galactose to UDP-glucose during normal galactose metabolism. The molecular structure of UDP-galactose 4-epimerase from Escherichia coli has now been solved to a nominal resolution of 2.5 A. As isolated from E. coli, the molecule is a dimer of chemically identic…
The tetradecapeptide Ac-D-F-L-A-E-G-G-G-V-R-G-P-R-V-OMe, which mimics residues 7f-20f of the A alpha-chain of human fibrinogen, has been co-crystallized with bovine thrombin from ammonium sulfate solutions in space group P2(1) with unit cell dimensions of a = 83.0 A, b = 89.4 A, c = 99.3 A, and beta = 106.6 degrees. T…
Abstract The liquid‐liquid‐plate contact angles of several plate materials were measured using a “preferential wetting method” proposed by the authors. The adhesional work ( I SL ), calculated on the basis of contact angles was utilized to evaluate plate wettability. The experimental results indicate that different pl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon-29 and gallium-71 NMR investigations of alkylammonium gallosilicate solutionsR. F. Mortlock, A. T. Bell, and C. J. RadkeCite this: J. Phys. Chem. 1992, 96, 7, 2968–2975Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Published iniss…