Materials Literature
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The isotope and hyperfine shifts for the Yb 1S0(6s2) → 3P1(6s6p) transition were determined with an acousto-optic modulator used to frequency shift part of a laser beam. The frequency-shifted and -unshifted laser beams were superimposed and excited an atomic beam. The laser was scanned across the transition while fluo…
The cellulose-binding domain from the scaffoldin subunit of the cellulosome from Clostridium thermocellum strain YS has been expressed in Escherichia coli, purified to homogeneity, and crystallized. Crystals were grown by vapor diffusion using polyethylene glycol as precipitant. They belong to the monoclinic space gro…
Abstract Poly(1,4- or 1,2-phenylenevinylene)s bearing a 2- or 4-substituted nitroxide radical were synthesized by polymerizing [bromo[N-tert-butyl-N-(trialkylsiloxy)amino]]styrenes with a palladium catalyst. The polyradicals were chemically stable, and their ESR and SQUID measurements indicated an intramolecular and t…
Bacteriophage T4 contains a phage-encoded anaerobic ribonucleoside triphosphate reductase, nrdD, previously named sunY. An open reading frame, 55.9, that resides downstream of the phage reductase was observed to have amino acid sequence similarity with the E. coli pyruvate formate-lyase (Pfl) activating enzyme. A stop…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Multistage Redox Properties of 9,10-Bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene Derivatives Functionalized with Ferrocenyl and Tetrathiafulvalenyl UnitsGary J. Marshallsay and Martin R. BryceCite this: J. Org. Chem. 1994, 59, 22, 6847–6849Publication Date…
The intermolecular interactions of the major cold-shock protein from Bacillus subtilis (CspB) in solution in the presence of different salts, including phosphate, have been studied by means of scanning calorimetry and size-exclusion chromatography. Calorimetric results indicate that, in all cases, protein unfolding ca…
The clpA gene that encodes the ATPase subunit of the ATP-dependent protease Ti (Clp) in Escherichia coli contains a putative internal translational initiation site. Here we show that mutagenesis of its 5'-end AUG codon resulted in an exclusive synthesis of the 65-kDa protein (ClpA65), while mutation at the internal 16…
The paper discusses the effect of the TL output decrease with a simultaneous growth of the peak emission intensity in dosimetric crystals of the anion defective a-Al2O3 at higher heating rates. This effect appeared to be directly related to the decrease of TL efficiency due to thermal quenching.
Cyclic voltammetry and polarization measurements on nickel under reducing gas atmospheres were performed to investigate the corrosion behavior of nickel as a base metal for molten carbonate fuel‐cell separator plate alloys. The anodic reactions observed are oxidation of hydrogen, oxidation of nickel to nickel oxide an…
Abstract Physical blends of polycarbonate (PC) with polycarprolactone (PCL), containing 0 to 30% PCL were prepared by melt mixing. The compatible blends were studied using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), mechanical testing, rheological and density measurements. Yield strengt…
Abstract The title complex was synthesized by the reaction of copper(I) iodide and tetrakis(ethylthio)tetrathiafulvalene (TTC2-TTF) in acetonitrile under argon atmosphere. The new compound, [(CuI)2TTC2-TTF], crystallizes in the monoclinic system, space group P21/m with unit-cell dimensions a = 9.843(2), b = 12.946(2),…
Abstract Electroactive 2,2′: 6,2″‐terpyridinyl ligands ( 3, 5, 6 ) and their iron(II) ( 7a–9a ) and ruthenium(II) complexes ( 7b–9b ) were synthesized. Bis[3‐(aminophenyl)‐2,2′ :6,2″‐terpyridinyl]metal(II) complexes ( 7a, 7b ) and bis[2‐(hydroxyphenyl)‐2,2′ :6,2″‐terpyridinyl]metal(II) complexes ( 8a, 8b ) were electr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConducting Polymers from Polybutadiene: Molecular Configuration Effects on the Iodine-Induced Conjugation ReactionsLiming Dai, Albert W. H. Mau, Hans J. Griesser, and David A. WinklerCite this: Macromolecules 1994, 27, 23, 6728–6735Publication Date (Print):November 1, 1994Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of a Flexible Graphite Film from Poly(acrylonitrile) Using a Layered Clay Film as TemplateTakashi Kyotani, Toshiki Mori, and Akira TomitaCite this: Chem. Mater. 1994, 6, 11, 2138–2142Publication Date (Print):November 1, 1994Publication History Published online1 May…
Amorphous carbon (a-C) structures over a wide range of densities are generated using tight-binding molecular-dynamics simulations. The a-C networks obtained by quenching low-density liquids consist of mostly threefold coordinated atoms. These a-C structures correspond to those obtained experimentally by evaporation of…
An interference effect on angular correlation patterns due to the exchange of Auger and photoelectrons of the same energy is discussed. The detection in coincidence of Auger and photoelectrons may reveal a striking angular correlation pattern when a synchrotron light source is tuned so that the Auger and photoelectron…
We observed the spontaneous electric polarization reversal induced by the magnetic field of 100 kOe at 78 K in single crystal samples of orthorhombic β'-phases of Tb2(MoO4)3 and TbGd(MoO4)3. We explained this effect by magnetoelastic coupling between the magnetic and electric subsystems in a crystal. This explanation…
A new class of amorphous and icosahedral phases has been obtained in rapidly solidified Zn-Mg-Rare-Earth Metal (RE) ternary alloys. The rapidly solidified alloy structure exhibits the amorphous phase when it contains the RE elements of La, Ce, Pr or Eu with large atomic size. On the other hand, it exhibits the icosahe…
We used electron-energy-loss spectrometry to measure the intensities of the Cu white lines found at the onsets of the ${\mathit{L}}_{2}$ and ${\mathit{L}}_{3}$ absorption edges of rapidly quenched CuZr, CuTi, CuPd, CuPt, and CuAu. Enhancements of the white lines in the alloys as compared to elemental Cu were correlate…