Materials Literature
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Cristallisation dans A2 1 am avec a=5,4398, b=5,3941, c=25,099 A, Z=4; affinement jusqu'a R=0,0295. Ce compose se decrit, a temperature ambiante, comme une modulation commensurable d'une structure parent Emmm. Le mode displacif F2mm, associe a la ferroelectricite du compose, est different des autres modes Amam et Abam…
A transport and reaction model of a low-pressure, high-frequency (13.56 MHz) CH/sub 4/ plasma used for diamondlike carbon (a-C:H) deposition was developed. The model includes reactions among four molecular species (CH/sub 4/, C/sub 2/H/sub 6/, C/sub 2/H/sub 4/, and H/sub 2/), five radicals and atom (CH/sub 3/, CH/sub…
Abstract The hydroxy acid-aided process using citric or malic acid produced a perovskite phase at relatively low calcination temperatures. The adjustment of the starting solution to an appropriate pH value in the malic acid-aided process resulted in reducing the temperature for the formation of single-phase perovskite…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotolysis of nitric acid in solid argon: the infrared absorption of peroxynitrous acid (HOONO)Bing Ming Cheng, Jeng Wen Lee, and Yuan Pern LeeCite this: J. Phys. Chem. 1991, 95, 7, 2814–2817Publication Date (Print):April 1, 1991Publication History Published online1 May 2002…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOlefin polymerization by vanadium-containing polyhedral oligometallasilsesquioxanesFrank J. Feher, John F. Walzer, and Rusty L. BlanskiCite this: J. Am. Chem. Soc. 1991, 113, 9, 3618–3619Publication Date (Print):April 1, 1991Publication History Published online1 May 2002Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSemiempirical study of electron exchange interaction in organic high-spin .pi.-systems. Classifying structural effects in organic magnetic moleculesPaul M. Lahti and Andrew S. IchimuraCite this: J. Org. Chem. 1991, 56, 9, 3030–3042Publication Date (Print):April 1, 1991Public…
The adsorption and reaction of HCOOH on the (0001)-Zn surface of ZnO was studied using high resolution electron energy loss spectroscopy (HREELS). Fourier deconvolution was used to remove phonon-phonon and phonon-adsorbate combination losses from the HREEL spectra of the adsorbate-covered surface, allowing adsorbed sp…
A method is developed to size the particles of contaminants in insulation of HV crosslinked polyethylene cable by using a Fraunhofer far-field in-line holographic technique with no need to cut the insulation into thin slices. The maximum thickness of the sample is 4.0 cm, when a resolution of 50 mu m is obtained. The…
To properly control radioiodine (129I) when reprocessing nuclear fuels, it is important to understand the interaction between iodine and the insoluble residue produced during the dissolution of spent fuels.Simulated spent-fuel pellets (∼1 g each) equivalent to spent fuel with a burnup of 5% fima were dissolved in 4.1…
Abstract A review of the development and application of extended X‐ray absorption fine structure (EXAFS) spectroscopy for in situ structural characterization of chemical processes at he electrode surface is presented. The designs of the in situ electrochemical cells developed to date are shown. Applications are presen…
Abstract A procedure for automaied microanalysis is adapted from a correction procedure for bulk samples. A particle size correction, based on the projected diameter of the particle, assumed to be spherical, is implemented when the diameter is less than or equal to the electron interaction diameter. A bulk correction…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced and redox-induced transmembrane processes with vesicle-stabilized colloidal cadmium sulfide and multicharged viologen derivativesYves M. Tricot, Ze'ev Porat, and Joost ManassenCite this: J. Phys. Chem. 1991, 95, 8, 3242–3248Publication Date (Print):April 1, 1991…
Conference Article| April 01 1991 Transforming growth factor-α Atanasio Pandiella; Atanasio Pandiella 1Howard Hughes Medical Institute and Cell Biology and Genetics Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, U.S.A. Search for other works by this author on: This Site PubMed Google Scholar Joan…
A study is made of the effect of strain rate on the strength of St 52‐3N mild steel, commonly used as deck plating in offshore structures. Stress‐strain curves are obtained in both tension and torsional shear at room temperature at strain rates from 10-4s-1 to 103s-1 and compared with previous work on mild steel. The…
Abstract The effect of annealing on the properties of poly(ether ether ketone) has been studied by changing annealing temperature and time. Crystallinity increases with annealing temperature, but is little affected by annealing time. Annealing time results suggest an improved crystalline perfection as annealing time i…
In this paper, a simple theoretical analysis of an old problem is presented. The analysis is more complete than earlier versions, but retains the mathematical simplicity of the earlier versions. The major thrust is to separate the material response into two phases. The first phase is dominated by strain rate effects a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransverse optical to longitudinal optical splitting and dipole moment derivatives from infrared spectra of thin films of molecular solidsLlewellyn H. Jones and Basil I. SwansonCite this: J. Phys. Chem. 1991, 95, 7, 2701–2707Publication Date (Print):April 1, 1991Publication…
Abstract Polyaddition of phosphoric acid to diepoxides, studied mostly with diepoxybutane (2) , provides either soluble or insoluble (gels) polymers, depending on polyadditions conditions. Gels swell in water and slowly hydrolyze to soluble linear/branched polymers. These soluble polymers, prepared either directly or…
The study of microstructure in the rigid-rod aramid poly(p-phenyleneterephthalamide) (PPTA) is augmented through the correlation of experimentally determined X-ray diffraction patterns with results from an atomistic model designed to simulate pseudocrystalline polymeric materials. Aspects of fiber spinning and X-ray a…
Abstract The pitting potential U p is an important characteristic of every pitting system. It separates the region of passivity where the metal is practically immune from the region of heavy localized corrosion attack. On the basis of our own experimental results on pitting corrosion in the aluminum/halide‐system, the…