Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilanation of silica surfaces. A new method of constructing pure or mixed monolayersP. Silberzan, L. Leger, D. Ausserre, and J. J. BenattarCite this: Langmuir 1991, 7, 8, 1647–1651Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published…
Neutron powder diffraction patterns from rutile (TiO{sub 2}, P4{sub 2}/mnm, a=4.594, c=2.959A) and anatase (TiO{sub 2}, I4{sub 1}/amd, a=3.785, c=9.514A) have been analysed by the Rietveld method. The positional parameters were determined to be x{sub O}=y{sub O}=0.30478(6) in rutile and z{sub O}=0.20806(5) in anatase.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly enantioselective epoxidation catalysts derived from 1,2-diaminocyclohexaneEric N. Jacobsen, Wei Zhang, Alexander R. Muci, James R. Ecker, and Li DengCite this: J. Am. Chem. Soc. 1991, 113, 18, 7063–7064Publication Date (Print):August 1, 1991Publication History Publish…
1. The Technology and Evaluation of Corrosion. 2. Electrochemical Thermodynamics and Electrode Potential. 3. Electrochemical Kinetics of Corrosion. 4. Passivity. 5. Polarization Methods to Measure Corrosion Rate. 6. Galvanic and Concentration Cell Corrosion. 7. Pitting and Crevice Corrosion. 8. Environmentally Induced…
A set of screening conditions for initial experiments in protein crystallization has been developed, tested, and is herein presented. These solution and precipitant conditions are empirically derived based on known or published crystallization conditions of various proteins in the past, so as to sample as large a rang…
An analysis is carried out of general aspects of the construction of three-dimensionally growing structures with an organic or an inorganic skeleton. Problems in the synthesis of novel polymeric forms based on organosilicon monomers are examined. Ways are discussed for overcoming steric effects in the surface layer, c…
Structural and magnetic properties of the rare-earth compounds ${\mathit{R}}_{2}$${\mathrm{Fe}}_{17}$${\mathrm{N}}_{\ensuremath{\xi}}$ have been studied with neutron-diffraction measurements and self-consistent spin-polarized electronic-structure calculations. The diffraction results indicate for the Nd compound that…
Measurements of the correlation function below the electrohydrodynamic instability in a thin layer of a nematic liquid crystal reveal fluctuating convection patches. Their amplitude A\ifmmode\bar\else\textasciimacron\fi{}, correlation length \ensuremath{\xi}, and correlation time \ensuremath{\tau} can be desribed by a…
A structure model for the decagonal quasicrystals AlCuCo and AlNiCo is proposed. The model agrees with available experimental data, i.e., with three-dimensional and five-dimensional Patterson analysis of x-ray-diffraction data and with direct-space atomic patterns found by high-resolution electron microscopy. The mode…
The effects of heteroatom addition on the nucleation of solid carbon in a low-pressure plasma reactor were investigated. Silane or diborane were added to acetylene mixed in hydrogen or argon. Oxygen was added to some of the diborane containing gas mixtures. Silane containing mixtures resulted in powder comprised of we…
The band gaps and exciton energies of CdS and GaP clusters are calculated for the first time using pseudopotentials. The calculated exciton energies of CdS over a wide range of cluster sizes are in excellent agreement with experiment. Furthermore, the exciton states of clusters with zinc-blende and hexagonal lattices…
The switching time (ts) for polarization reversal in ferroelectric films of PbZr0.53Ti0.47O3 and La-substituted PbTiO3 has been investigated. The films were prepared by spin-on and metalorganic decomposition followed by processing into ferroelectric capacitors having electrode areas ranging from 9 to 50 000 μm2. Pulse…
Two-dimensional molecular patterns were obtained by the adsorption of long-chain alkanes, alcohols, fatty acids, and a dialkylbenzene from organic solutions onto the basal plane of graphite. In situ scanning tunneling microscopy (STM) studies revealed that these molecules organize in lamellae with the extended alkyl c…
The structure of a 20-amino acid peptide inhibitor bound to the catalytic subunit of cyclic AMP-dependent protein kinase, and its interactions with the enzyme, are described. The x-ray crystal structure of the complex is the basis of the analysis. The peptide inhibitor, derived from a naturally occurring heat-stable p…
Using a mold for centrifugal casting as an example, discusses the types of apparatus and tools that are commonly affected by thermal fatigue during industrial processes, and examines the various factors that lead to such failure. Focuses on the performance of particular industrial components under d
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
The complete COOH-propeptide of human alpha 1(I) procollagen was chemically synthesized as a series of overlapping subfragments which were then tested for their effect on extracellular matrix protein production by subconfluent human lung fibroblasts (HFL-1). One peptide (R11; residues 197-241) stimulated production of…
Large nonresonant third-order hyperpolarizabilities, γ1111, for solutions of three organic charge-transfer complexes in tetrahydrofuran have been measured. The values obtained for nonresonant γ1111 are 5.8×10−32 esu for Perylene/tetracyanoethylene, 1.2×10−32 esu for Pyrene/tetracyanoethylene, and 7.2×10−33 esu for Nap…
A precise definition for the crystallite orientation distribution function (codf) of cubic polycrystals is given in terms of the set of distinct orientations of a cube. Elements of the classical Fourier representation of the codf, in terms of (symmetrized) generalized spherical harmonics, are reviewed. An alternative…
A convenient method for calculating phonon frequencies at q=0 and macroscopic dielectric constants in cubic insulators is developed in the framework of the density functional method: it is applicable to the case of both local and non-local pseudopotentials. The equilibrium unit-cell volume, bulk modulus, equation of s…