SrTiO3 by XPS
X-ray photoelectron spectroscopy measurements of the principal core levels, including the energy loss regions, for a SrTiO3(100) single crystal are presented.
Materials Literature
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Isolation and comparison of the paracrystalline surface layer proteins of freshwater caulobacters
Several methods for isolation of the paracrystalline surface (S) layer protein (RsaA) of Caulobacter crescentus CB15A were evaluated. Treatment of cells with HEPES (N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid) buffer at pH 2 was the most effective means of selectively removing RsaA from cells, and after neutra…
A New Structure–Magnetism Relationship for Face‐Sharing Transition‐Metal Complexes with d 3 –d 3 Electronic Configuration
A through‐space interaction and not superexchange of the bridging ligands explains the antiferromagnetic coupling in dinuclear face‐sharing octahedral complexes with d 3 ‐d 3 electronic configuration. The metal‐metal distance is the only relevant structural parameter for the spin‐exchange coupling constants of a serie…
Experimental Characteristics of Electret Generator, Using Polymer Film Electrets
An experimental electret generator has been developed to examine its operating theory. Although the generator is essentially a simplified version of Jefimenko's electret generator, it has none of the shortcomings of his generator. Since the electret used in our generator is a Teflon FEP film electret retaining stable…
Elastic Properties and Molar Volume of Rare‐Earth Aluminosilicate Glasses
The elastic properties, molar volume, and glass transition temperature ( T g ) of rare‐earth‐containing aluminosilicate glasses were investigated in the compositions of SiO 2 –LnAlO 3 and SiO 2 –Ln 3/4 Al 5/4 O 3 , where Ln is Y, La, Nd, Eu, or Yb. The molar volume decreased with decreased ionic size of the Ln 3+ ion,…
Cloning and expression of a human ATP‐citrate lyase cDNA
A full-length cDNA clone of 4.3 kb encoding the human ATP-citrate lyase enzyme has been isolated by screening a human cDNA library with the recently isolated rat ATP-citrate lyase cDNA clone [Elshourbagy et al. (1990) J. Biol. Chem. 265, 1430]. Nucleic-acid sequence data indicate that the cDNA contains the complete co…
X‐ray‐induced beam damage observed during x‐ray photoelectron spectroscopy (XPS) studies of palladium electrode ink materials
Abstract The surface compositional characteristics of two palladium metal electrode inks, air‐dried on barium titanate (BaTiO 3 ) dielectric ceramic substrates, have been studied using x‐ray photoelectron spectroscopy (XPS). It is found the exposure of the inks to the x‐ray beam during the time of analysis required fo…
Synthetic bilayer adsorption onto polystyrene microspheres
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthetic bilayer adsorption onto polystyrene microspheresA. M. Carmona-Ribeiro and B. R. MidmoreCite this: Langmuir 1992, 8, 3, 801–806Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March 1992https://pubs.acs.org/doi/…
Powder-diffraction patterns and structural models for palygorskite
Models proposed for the crystal structure of palygorskite are considered and a range of structures identified that have reasonable cation coordination, cation-oxygen distances and O-O nonbonded distances. Powder-diffraction patterns are calculated for these structures and compared with observed patterns. Structural mo…
Poly(aryl ether oxadiazoles)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(aryl ether oxadiazoles)J. L. Hedrick and R. TwiegCite this: Macromolecules 1992, 25, 7, 2021–2025Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March 1992https://pubs.acs.org/doi/10.1021/ma00033a028https://doi.org…
High‐density polyethylene pipe resins
Efficient catalyst systems and an appropriate polymerization technology are required for the production of pipe resins which must exhibit both high stiffness and excellent service lifetimes (i.e. resistance to environmental stress cracking). The problem is that these requirements are contradictory but recently a polym…
Increment of Photocatalytic Killing of Cancer Cells Using TiO2 with the Aid of Superoxide Dismutase
Abstract It was found that the efficiency of photocatalytic killing of cancer cells with TiO2 particles under aerial condition was increased by adding superoxide dismutase (SOD). This enhancement effect of SOD was suppressed when catalase, hydrogen peroxide scavenger, was added to the system. These results can be reas…
Fracture and Contact Adhesion Energies of Mica‐Mica, Silica‐Silica, and Mica‐Silica Interfaces in Dry and Moist Atmospheres
A study is made of the factors that contribute to the energy of mica‐mica, silica‐silica, and mica‐silica interfaces in the presence of moist atmospheres. Energies are measured using brittle fracture and contact adhesion techniques. Both “virgin” and “healed” interfaces are investigated, with special attention on the…
THE CHEMISTRY OF VESUVIANITE
The crystal chemistry and chemical variations in 76 vesuvianite samples from 54 different localities have been examined using electron-microprobe analyses i supple mented by analysis of selected samples for Fe.+ IFe 3 +, Li, Be and H20. Results of analyses were reduced to formula units on the basis of 50 cations excl…
Evaluation of Corrosion Inhibitors by Electrochemical Noise Analysis
The corrosion potential fluctuations of aluminum alloy AA 6351 electrodes in 0.5 M chloride solutions were recorded both in the absence and in the presence of the following inhibitors: 2‐mercaptopyrimidine, sodium molybdate, and sodium nitrate. The corresponding spectral density plots, calculated over a wide frequency…
Isothermal thickening and thinning processes in low molecular-weight poly(ethylene oxide) fractions crystallized from the melt. 3. Molecular weight dependence
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsothermal thickening and thinning processes in low molecular-weight poly(ethylene oxide) fractions crystallized from the melt. 3. Molecular weight dependenceStephen Z. D. Cheng, Jianhua Chen, Jeffrey S. Barley, Anqiu Zhang, Anton Habenschuss, and Paul R. ZschackCite this: M…
A 13C NMR Study on Collagens in the Solid State: Hydration/ Dehydration-Induced Conformational Change of Collagen and Detection of Internal Motions
We recorded 13C NMR spectra of type I and IV collagens in the anhydrous and hydrated states, in order to confirm our previous assignment of peaks, and to analyze the mode of partial renaturation of soluble collagens by hydration, as well as rapid intramolecular motions such as ring puckering in proline or hydroxyproli…
Substrate Temperature Dependence of Transparent Conducting Al-Doped ZnO Thin Films Prepared by Magnetron Sputtering
A technique is demonstrated that improves the substrate spatial distributions of resistivity and film thickness of transparent conducting oxide thin films prepared using a conventional dc planar magnetron sputtering method. The spatial distributions of Al-doped ZnO (AZO) films are markedly improved by deposition onto…
Crystallization kinetics of β‐phase poly(propylene)
Abstract Crystal growth rates of spherulites of β‐phase poly(propylene)s and of an ethylene/propene block copolymer, crystallized from the melt, have been investigated in the temperature range of 122 to 146°C. On the basis of the regime theory, a transition between regime II and III is found at Δ T ≈ 37–43,5 K. The nu…
Morphology of Carbon-Black Aggregates: Fractal Versus Euclidean Geometry
Abstract A study has been made comparing the utility of fractal and Euclidean geometry in the characterization of carbon-black aggregates. The fractal models used were the perimeter-area relationship, P∼A D p /2 , and the mass fractal, M∼R D m . Values of the perimeter fractal, D p , and the mass fractal, D m , were d…