Eine neuartige Blei‐Sauerstoff‐Baugruppe: Pb8O8+4
Abstract Das vollständige Manuskript dieser Zuschrift erscheint in: Angew. Chem. Suppl. 1983 , 427. DOI: 10.1002/ange.198304270
Materials Literature
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Optical and Electrical Properties of Yttria Stabilized Zirconia (YSZ) Crystals
Optical transmission spectra and d‐c conductivity (25°–1000°C) data were obtained on yttria stabilized zirconia (YSZ) single crystals commercially grown by the skull‐melting process. The crystals were doped with up to 2.0 w/o rare earth (Ce, Nd, Er, Pr) and transition (Mn, Fe, Cr, Ni) metal ions, and a few were anneal…
Effect of polystyrene molecular weight on the fluorescence of molecular rotors
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of polystyrene molecular weight on the fluorescence of molecular rotorsRafik O. LoutfyCite this: Macromolecules 1983, 16, 4, 678–680Publication Date (Print):April 1, 1983Publication History Published online1 May 2002Published inissue 1 April 1983https://pubs.acs.org/d…
Characterization of the Escherichia coli thyA gene and its amplified thymidylate synthetase product.
The 7.8-kilobase HindIII insert in phage lambda NM589thyA [Borck, K., Beggs, J.D., Brammar, W.J., Hopkins, A.S. & Murray, N. (1976) Mol. Gen. Genet. 146, 199] was confirmed as originating from Escherichia coli by hybridization analysis and was shown to encode the thymidylate synthetase (5,-10-methylenetetrahydrofolate…
The 3 A resolution structure of a D-galactose-binding protein for transport and chemotaxis in Escherichia coli.
X-ray diffraction studies of a D-galactose-binding protein essential for transport and chemotaxis in Escherichia coli have yielded a model of the polypeptide chain backbone. An initial polyalanine backbone trace was obtained at 3.2 A resolution by the molecular replacement technique, using a polyalanine search model d…
Infrared Studies of Ni-Bearing Clay Minerals of the Kerolite-Pimelite Series
Abstract Two kerolite and one garnierite samples were subjected to progressive heat treatments prior to their examination by infrared spectroscopy (IR) in the 1200-600-cm −1 and 3800-3000-cm −1 regions. The heat treatment of the garnierite (a mixture of nepouite and pimelite) selectively dehydroxylated the nepouite th…
RHEED streaks and instrument response
Reflection high-energy electron diffraction (RHEED) is so sensitive to surface morphology that it is difficult to separate the roles of instrument response and surface imperfection in the diffraction. To address this difficulty we have used MBE grown GaAs(001) as a test surface to study the angular dimensions of the d…
Inverse photoemission
Inverse photoemission (or ultraviolet bremsstrahlung spectroscopy) is an emerging new technique for the study of the electronic structure of solid surfaces. It has the important characteristic of being able to probe states between the Fermi level and vacuum level. Here we survey current experimental practice and futur…
Electrochemical routes to paramagnetic dinuclear and mononuclear palladium .pi. complexes stabilized by the pentaphenylcyclopentadienyl ligand
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical routes to paramagnetic dinuclear and mononuclear palladium .pi. complexes stabilized by the pentaphenylcyclopentadienyl ligandKaren Broadley, Gregg A. Lane, Neil G. Connelly, and William E. GeigerCite this: J. Am. Chem. Soc. 1983, 105, 8, 2486–2487Publication…
Sputtered Bi2Te3 and PbTe thin films
Thin films of Bi2Te3 and PbTe were produced by sputtering using targets of stoichiometric compounds. The compositions of these sputtered thin films were analyzed by the electron microprobe; the Bi2Te3 film showed nonstoichiometric compositions of Bi=44.5 at.%, Te=55.5 at.%, whereas the compositions of PbTe films were…
Electrochemical reduction of the gold cluster Au9(PPh3)83+. Evidence for an ErErCr mechanism. Formation of the paramagnetic gold cluster Au9(PPh3)82+
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical reduction of the gold cluster Au9(PPh3)83+. Evidence for an ErErCr mechanism. Formation of the paramagnetic gold cluster Au9(PPh3)82+J. G. M. Van der Linden, M. L. H. Paulissen, and J. E. J. SchmitzCite this: J. Am. Chem. Soc. 1983, 105, 7, 1903–1907Publicati…
Measurement of stresses generated in cured polyimide films
We have measured ‘‘in situ’’ the stresses generated in polyimide films produced from the ethyl ester of benzophenone tetracarbolic acid and methylene dianiline during the curing cycle. The room temperature stress in a fully cured film (to 400 °C) is approximately 70 MPa. The stresses at room temperature vary with the…
Photoemission determination of dipole layer and VB-discontinuity formation during the MBE growth of GaAs on Ge(110)
Synchrotron radiation-excited soft x-ray photoemission is used to study the heterojunction formation of GaAs on Ge(110) by examining 3d-core levels, the valence band (VB), and the secondary electron distribution cutoff in a photoemission spectrum. Arsenic saturation of the Ge(110) surface prior to MBE growth of GaAs c…
Groundwater geochemistry and calcite cementation of the aquia aquifer in southern Maryland
The Aquia aquifer in southern Maryland exhibits three regions that are characterized by distinctly different water composition. Region I is about 26 mi (42 km) wide and is parallel to the outcrop area. Water in region I has relatively high calcium (∼30 mg/l), magnesium (∼10 mg/l), and bicarbonate (∼150 mg/l) concentra…
Blue Sputtered Iridium Oxide Films (Blue SIROF's)
We report on the preparation and properties of "blue" sputtered iridium oxide films (blue SIROF) and compare their properties with those of previous "black" SIROF's as well as anodically grown iridium oxide films (AIROF's). Blue SIROF's are prepared by reactive d‐c sputtering of iridium in argon/oxygen, mixture, at de…
Electrochemical and ESR studies of the redox reactions of nickel(II), palladium(II), and platinum(II) complexes of 1,2-diphenyl-1,2-ethenedithiolate(2-)-S,S'
The electron spin resonance (ESR) spectra of the one-electron-reduction products of the 1,2-diphenyl- 1,2-ethenedithiolate complexes M(Ph2C2S2)2 (M = Ni, Pd, Pt) support the view that these reductions are mainly ligand based. Dc cyclic voltammetric studies of the above complexes also show an apparently quasi-reversibl…
TRANSVERSE CONDUCTION AND METAL-INSULATOR TRANSITION IN β-(BEDT-TTF)2PF6
Abstract In the crystal of β-(BEDT-TTF)2PF6, BEDT-TTF (bis(ethylenedithiolo)tetrathiafulvalene) molecules are arranged side-by-side. The anisotropy of the electrical resistivity shows that β-(BEDT-TTF)2PF6 is the first organic conductor where the conductivity is the largest along the direction parallel to the molecula…
Physical aging in polystyrene: Comparison of the changes in creep behavior with the enthalpy relaxation
Abstract Physical aging in polystyrene was studied by annealing samples isothermally (at 22°, 57°, and 93°C) for various lengths of time and measuring the changes in the enthalpy and the flexural creep property. The enthalpy decrease reached a constant value after about 10 hours of aging at 93°C, indicating an apparen…
Thermal and mechanical properties of a poly(ethylene oxide-b-isoprene-b-ethylene oxide) block polymer complexed with sodium thiocyanate
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal and mechanical properties of a poly(ethylene oxide-b-isoprene-b-ethylene oxide) block polymer complexed with sodium thiocyanateC. Robitaille and J. Prud'hommeCite this: Macromolecules 1983, 16, 4, 665–671Publication Date (Print):April 1, 1983Publication History Publi…
Stereochemistry of cytochrome P-450-catalyzed epoxidation and prosthetic heme alkylation.
Oxidation of 1-octene by cytochrome P-450 results concurrently in formation of 1,2-oxidooctane and in N-alkylation by the catalytically activated olefin of the prosthetic heme group. The stereochemistry of trans-1-[1-2H]octene is retained during both transformations. This alkylation stereochemistry requires addition o…