Correlations and Defect Energies
Received 15 November 1985DOI:https://doi.org/10.1103/PhysRevLett.56.1509©1986 American Physical Society
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Determination of Interface States for CaF2/Si(111) from Near-Edge X-Ray-Absorption Measurements
The technique of polarization-dependent near-edge x-ray absorption is applid to an interface by taking advantage of core-level and Auger energy shifts for interface atoms. For epitaxial Ca${\mathrm{F}}_{2}$/Si(111) several unoccupied Ca- and F-derived interface states are found. The orientation of the corresponding or…
The Geochemical Behavior of Aluminum in Acidified Surface Waters
Speciation calculations for aluminum, in water samples taken from a drainage basin containing acid mine waters, demonstrate a distinct transition from conservative behavior for pH below 4.6 to nonconservative behavior for pH above 4.9. This transition corresponds to the pK for the first hydrolysis constant of the aque…
Transverse-wave model of the distorted phases of theTaTe4andNbTe4structures
A Landau-model free energy describing possible ${\mathrm{TaTe}}_{4}$ and ${\mathrm{NbTe}}_{4}$ distorted states resulting from transverse columnar distortions is constructed and analyzed, and solutions corresponding to various commensurate and incommensurate states are found. The possibilities of accounting for the ex…
Long‐term transients in a reactor under forced concentration cycling
Abstract In the approach to a cycle‐invariant state in the forced feed concentration cycling of the CO oxidation over a NiO catalyst, a very long transient has been observed lasting 80 ks or more. This transient appears to be associated only with CO pretreatment of the catalyst and is not a general phenomenon. The slo…
Studies on glutamine synthetase from Streptomyces hygroscopicus var. jinggangensis.
Streptomyces hygroscopicus var. jinggangensis produces validamycin, an important antibiotic used in agriculture. It was found that there was a positive correlation between the specific activity of mycelial glutamine synthetase (GS) and validamycin biosynthesis in our laboratory. So, in this paper, the purification, ch…
Quantitative estimation of matrix‐filler interactions in ferrite‐filled styrene‐isoprene‐styrene block copolymer systems
Abstract Quantitative estimation of matrix‐filler interaction in highly loaded ferrite filled Styrene‐isoprene‐styrene block copolymer has been attempted through dynamic viscoelastic melt studies. A correlation between the interaction parameter in the melt state and that in the solid state at comparable frequency of d…
Fundamental ideas on metal-dielectric transitions in 3d-metal compounds
Основные представления Рѕ переходах металл–диэлектрик РІ соединениях 3d-металлов, Зайцев Р .Рћ., РљСѓР·СЊРјРёРЅ Р•.Р’., Овчинников РЎ.Р“.
Kinetics and equilibria of silver(1+) and lead(2+) cryptates in dimethyl sulfoxide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and equilibria of silver(1+) and lead(2+) cryptates in dimethyl sulfoxideB. G. Cox, J. Garcia-Rosas, H. Schneider, and Ng Van TroungCite this: Inorg. Chem. 1986, 25, 8, 1165–1168Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Publ…
Further morphological studies of trans-1,4-polyisoprene crystallized from solution
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFurther morphological studies of trans-1,4-polyisoprene crystallized from solutionJiarui Xu and Arthur E. WoodwardCite this: Macromolecules 1986, 19, 4, 1114–1118Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 198…
SYNTHESES AND PROPERTIES OF BINAPHTHO[1,8-de]-1,3-DITHIIN-2-YLIDENE AND ITS SELENIUM ANALOGUE
Abstract With a view to discovering new electron donors for low-dimensionally metallic materials, the title compounds were prepared via the corresponding 1,8-dichalcogen-bridged naphthalenes. Their donor characters were examined by cyclic voltammetry, as compared with those of the reference compounds.
UTILIZATION OF CHEMICAL AND STRUCTURAL CHARACTERISTICS OF TETRAAZA CYCLOALKANE COMPLEXES
The research investigations aiming at taking advantage of the chemical and structural consequences of ligand macrocyclization are reviewed with regard to the three features as follows: (1) Tetraazacycloalkane complexes which take up carbon dioxide as ROCO2 − or R2NCO2 −; (2) Correlation between axial and inplane coord…
Chemical reactions in the bulk of the epoxy‐functional silane hydrolyzate
Abstract Chemical reactions in the epoxy‐functional silane hydrolyzate bulk have been studied by Fourier transform infrared spectroscopy (FT‐IR). It was found that the silanol group opened the epoxy ring upon heating, concurrently with the silanol condensation. The kinetics of these reactions were studied, and the rel…
Flame‐resistant polycaproamide by anionic polymerization of ϵ‐caprolactam in the presence of suitable flame‐retardant agents
Abstract Poly(ϵ‐caprolactam) (PCL) with improved flame‐retardant (FR) properties can be easily obtained by activated anionic polymerization of the monomer, ϵ‐caprolactam (C), in the presence of adequate amounts of red phosphorus (red P). Analogous results with reduced P content can be achieved by coupling red P with a…
Chain flexibility parameter and persistence length of various poly(methacrylic acid esters)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChain flexibility parameter and persistence length of various poly(methacrylic acid esters)Michel TricotCite this: Macromolecules 1986, 19, 4, 1268–1270Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 1986https://p…
Brittleness Dependence of Crack Branching in Ceramics
A linear correlation between the degree of overloading on the crack tip and brittleness was observed. The intercept, which was √2, is identified with a minimum condition of overloading where branching occurs at twice the fracture energy. The slope was identified with the degree of plastic deformation at the crack tip…
GENERATION OF ORGANIC CONDUCTING PATTERNS ON SEMICONDUCTORS BY PHOTOELECTROCHEMICAL POLYMERIZATION OF PYRROLE
Abstract Photoelectrochemical polymerization of pyrrole occurs at irradiated areas of semiconducting electrodes in aqueous solution of pyrrole. Organic conducting polypyrrole patterns were formed on semiconductors by area-selective irradiation of the semiconductor electrodes. The deposition rate was 0.5–0.7 μm per 100…
Hydrophobic, regiospecific guest binding by transition-metal host complexes having permanent voids as revealed by FT-NMR relaxation studies
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrophobic, regiospecific guest binding by transition-metal host complexes having permanent voids as revealed by FT-NMR relaxation studiesThomas J. Meade, Whei Lu. Kwik, Norman. Herron, Nathaniel W. Alcock, and Daryle H. BuschCite this: J. Am. Chem. Soc. 1986, 108, 8, 1954–…
Heat-capacity study of one liquid-crystal compound with smectic-A–hexatic-B–crystal-Btransition
High-resolution heat capacity measurements have been carried out in the smectic-A--hexatic-B--crystal-B transitions of the compound 4-propionyl-4'-(n-heptanoyloxy)azobenzene. Qualitatively, the heat-capacity anomalies of this smectic-A--hexatic-B--crystal-B transition sequence mimic those of the smectic-C--smectic-I--…
Exact solution of Dill's model equations for positive photoresist kinetics
The equations of Dill for bleaching of photoactive compound in positive photoresists have been solved analytically in closed form. As an application, the contrast γ, has been evaluated explicitly in the absence of reflection from the substrate.