Materials Literature
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The problem of deriving an optimal set of thermodynamic properties of minerals from a diverse experimental data base is reviewed and a preferred methodology proposed. Mathematical pro-gramming(MAP) methods extend the linear programming (LIP) approach first presented by Gordon (1973), and make it possible to account fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical procedure for preparing surface-enhanced Raman scattering active silver filmsFan. Ni and Therese M. CottonCite this: Anal. Chem. 1986, 58, 14, 3159–3163Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 Decembe…
Abstract In the presence of oxygen and visible light, various synthetic water‐soluble porphyrins cleave pBR 322 plasmid supercoiled DNA (form I) producing relaxed (form II) and linear (form III) DNA corresponding to single‐strand and double‐strand breaks respectively. Large variations are observed in the efficiency of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganoiron electron-reservoir complexesDidier AstrucCite this: Acc. Chem. Res. 1986, 19, 12, 377–383Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 December 1986https://pubs.acs.org/doi/10.1021/ar00132a001https://doi…
Abstract Electron diffraction patterns of highly oriented poly( p ‐phenylene vinylene) films obtained by the soluble polymeric precursor route are interpreted on the basis of a monoclinic unit cell containing two monomer units: c (chain axis) = 0.658 nm, a = 0.790 nm, b = 0.605 nm, α ≃ 123°. The molecules are nearly p…
Using grazing incidence geometry and fluorescence detection, surface EXAFS of a monolayer of underpotentially deposited copper on epitaxially deposited gold (111) on mica was observed. Both Cu–Au and Cu–O scattering are observed. The results are interpreted in terms of models in which the Cu–O distance is 2.08±0.03 Å…
The relationship between material softening and structural softening is investigated through the use of a model problem in one dimension. If the size of the softening zone is large the structural softening response is stable under displacement-prescribed loading. For a small size, the softening response is unstable an…
Various diagnostic methods of GIS have been studied and some of them were applied in the field. In this paper the principles of methods such as mechanical, chemical, electrical detection, and others are described. As mechanical methods, a highly sensitive piezo-electric acceleration sensor and an ultrasonic-wave senso…
Abstract Pyrex-filtered photoirradiation with a high-pressure Hg lamp was performed for a thermally inert hydridocobalt(I) CoH[PPh(OEt)2]4 in the presence of some allylic compounds. Allyl benzoate and allyl phenyl ether showed the cleavage of allylic-O bonds to give propene in a stoichiometric quantity to the complex…
Abstract The NH 2 (X̃ 2 B 1 ) radical reactions with saturated hydrocarbons, toluene and acetaldehyde were investigated in an isothermal discharge flow system over the given temperature ranges. The pressure was varied between 2.6 and 7.8 mbar. Helium was used as the main carrier gas. The temperature dependences of the…
The average structure (CI) of a volcanic plagioclase megacryst with composition Ano, from the Hogarth Ranges, Australia, has been determined using three-dimensional, singlecrystal neutron and X-ray diffraction data. Least squaresr efinements, incorporating anisotropic thermal motion of all atoms and an extinction corr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of the cluster complex tris(1-cysteinethiolato)pentacopper(2+) perchlorate monohydrate, a mixed-valence copper-mercaptide speciesParimal K. Bharadwaj, Elizabeth John, Chuan Liang Xie, Dechun Zhang, David N. Hendrickson, Joseph A. Pot…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange interaction through hydrogen-bond bridges and the effect of a single-oxygen bridge. Crystal structures and magnetic susceptibilities of two binuclear copper(II) complexes of 2-amino-2-methyl-1-propanolHeikki MuhonenCite this: Inorg. Chem. 1986, 25, 26, 4692–4698Publ…
When crystals of N,N′,N″-trialkyl-1,3,5-benzenetricarboxamides with alkyl groups from pentyl to octadecyl are heated, viscous birefringent fluids are produced at temperatures between 40 and 120[ddot]C depending upon the alkyl chain length and they are transformed into optically isotropic liquids above 200[ddot]C. Tran…
We investigated populations of the diatom genus Didymosphenia from Lake Baikal, two localities in China, in Lake Karluk, Alaska, and in Lake Superior using quantitative shape analysis. Four different taxa were distinguished in the Lake Baikal material, two belonging to recognized species, and two of uncertain affiniti…
The charge distribution in orthoboric acid, B(OH)3, Mr=61.83, has been investigated experimentally using low-temperature X-ray diffraction data and theoretically by ab initio calculations. Crystal data at 105 K, triclinic, space group P1, a = 7.0187 (14), b = 7.035 (2), c=6.3472 (12) A, a =92.49 (12), /3-- 101.46 (2),…
During the production and usage of HV dc power cables with plastic insulating materials, formation of space charges in the insulating material has become a significant problem. Many studies on the formation of space charge in insulating materials have been conducted and these past and current Japanese studies are revi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleOn the glass transition and viscosity of phosphorus pentoxideS. W. Martin and C. A. AngellCite this: J. Phys. Chem. 1986, 90, 25, 6736–6740Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 December 1986https://pubs.acs.org…
Abstract Syntheses of ferric smectites were performed at low temperature (75° C by aging coprecipitated gels of silica and Fe 2+ -sulphate under initially reducing then oxidizing conditions. Under strictly reducing conditions only nuclei of a trioctahedral ferrous stevensite were observed and crystal growth did not ta…
Abstract Expanding and non-expanding layers of interstratified clay minerals have been examined by high-resolution transmission electron microscopy. Permanent expansion of swelling layers under the electron beam was achieved by intercalation of n -alkylammonium ions, especially the octadecylammonium ion. Oriented flak…