Materials Literature
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The authors describe the results obtained from a rarely published method of calculating eddy losses in thick conducting materials. The surface impedance formulation is used in a finite element software package which is applied in turn to the design of large power transformers. The transformer and model details are dis…
The PbSc0,5Ta0,5O3 solutions are found to be a useful material for active elements of microcryogenic devices based on electrocaloric effect. A temperature difference of ΔT = 1. 0-1.8 K at field intensities 20–30 kV/cm in the interval of 210–310 K can be achieved by simultaneous or separate introducing of Sb and Co ion…
X-ray photoelectron spectroscopy measurements of the principal core levels, including the energy loss regions, for a SrTiO3(100) single crystal are presented.
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 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…
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…
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,…
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…
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…
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/…
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…
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…
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…
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…
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 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…
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…
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…
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…
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…