Fiber optic application for thermal switching in vanadium dioxide films
Large thermally induced changes in the end-interface reflectance and transmittance of silica fibers coated with vanadium dioxide films have been observed.
Materials Literature
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Divergent transcription of pdxB and homology between the pdxB and serA gene products in Escherichia coli K-12
We report the DNA sequence and in vivo transcription start of pdxB, which encodes a protein required for de novo biosynthesis of pyridoxine (vitamin B6). The DNA sequence confirms results from previous minicell experiments showing that pdxB encodes a 41-kilodalton polypeptide. RNase T2 mapping of in vivo transcripts a…
Electrochemical, theoretical, and ESR characterizations of porphycenes. The .pi. anion radical of nickel(II) porphycene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical, theoretical, and ESR characterizations of porphycenes. The .pi. anion radical of nickel(II) porphyceneM. W. Renner, A. Forman, W. Wu, C. K. Chang, and J. FajerCite this: J. Am. Chem. Soc. 1989, 111, 23, 8618–8621Publication Date (Print):November 1, 1989Publi…
Transcription signals and protein binding sites for sericin gene transcription in vitro
Using nuclear extracts from Bombyx mori middle silk glands (MSG) where the sericin-1 (Ser-1) mRNA is produced specifically, we have studied the in vitro transcription of the Ser-1 gene. To determine the sites required for the promoter function of the Ser-1 gene and characterize the factors binding to these sites, the…
Application of a membrane model to the sorptive interactions of humic substances.
Humic substances, the dark-colored, natural organic polyelectrolytes that are found in practically all soils, sediments, and natural water, strongly interact with both inorganic and organic pollutants. Inorganic cationic species generally undergo complexation reactions with humic substances. The binding of cations, su…
Synchrotron‐based X ray absorption studies of cation environments in Earth materials
Since its development in the early 1970s, synchrotron‐based X ray absorption spectroscopy (XAS) has proven to be a versatile structural probe for studying the local environments of cations in a variety of earth materials ranging from crystalline solids, silicate glasses, and high‐temperature silicate melts to aqueous…
Kinetics and mechanisms of the thermal dehydration of dilithium sulfate monohydrate
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanisms of the thermal dehydration of dilithium sulfate monohydrateNobuyoshi Koga and Haruhiko TanakaCite this: J. Phys. Chem. 1989, 93, 23, 7793–7798Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Published inissue 1 No…
The first structural characterization of a nickel(I) macrocyclic system: structure of nickel(I) diphenyldi-p-toyl-21-thiaporphyrin
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe first structural characterization of a nickel(I) macrocyclic system: structure of nickel(I) diphenyldi-p-toyl-21-thiaporphyrinLechoslaw Latos-Grazynski, Marilyn M. Olmstead, and Alan L. BalchCite this: Inorg. Chem. 1989, 28, 22, 4065–4066Publication Date (Print):November…
Preparation of a Layered Double Hydroxide–Porphyrin Intercalation Compound
Abstract 5,10,15,20-tetra(4-sulfonatophenyl)porphin (TSPP) is intercalated into the interlayer space of hydrotalcite by anion exchange. The intercalated porphyrin anions are possibly arranged with the molecular plane perpendicular to the hydroxide layers.
Refinement of Zinc Silicate Phosphor Synthesis
Zinc silicates are important in CRTs and lamp phosphors. Previous work has shown that a sol‐gel‐like method (termed CGUPS) can produce uniform zinc silicate phosphor particles whose surface layer possesses an appropriate activator concentration gradient and exhibits efficient cathodoluminescence (CL). This work furthe…
Steric influence of the trimethylsilyl group in organic reactions
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSteric influence of the trimethylsilyl group in organic reactionsJih Ru Hwu and Naelong WangCite this: Chem. Rev. 1989, 89, 7, 1599–1615Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Published inissue 1 November 1989https://pubs.acs.or…
Crystallization and characterization of human chorionic gonadotropin in chemically deglycosylated and enzymically desialylated states
Crystals suitable for X-ray diffraction studies at moderate resolution have been grown from two forms of human chorionic gonadotropin (hCG): HF-treated hCG and neuraminidase-treated hCG. The enzymatically desialylated form of hCG produced crystals that diffract to 2.8 A as compared to the HF-treated hCG crystals that…
Kinetics of copper-PTSM in isolated hearts: a novel tracer for measuring blood flow with positron emission tomography.
Copper(II) pyruvaldehyde bis(N4-methylthiosemicarbazone) ([Cu]PTSM) has shown potential as a flow tracer and can be labeled with the generator-produced positron emitting radionuclide 62Cu as well as with other copper radioisotopes. To define the myocardial handling of [Cu]PTSM, the externally detected single pass extr…
Chemical disorder in non-oxide chalcogenide glasses. Site speciation in the system phosphorus-selenium by magic angle spinning NMR at very high spinning speeds
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical disorder in non-oxide chalcogenide glasses. Site speciation in the system phosphorus-selenium by magic angle spinning NMR at very high spinning speedsDavid Lathrop and Hellmut EckertCite this: J. Phys. Chem. 1989, 93, 23, 7895–7902Publication Date (Print):November 1…
Fracture Mechanics: Perspectives and Directions
The present work includes twelve invited review papers with comprehensive descriptions of the challenges in six topical areas: analytical fracture mechanics, nonlinear and time-dependent fracture mechanics, microstructure and micromechanical modeling, fatigue crack propagation, environmentally assisted cracking, and f…
Focused ion beam induced deposition of low-resistivity gold films
Focused ion beam induced deposition of metals has up to now produced films with resistivities 30–5000 times higher than bulk values for metals because of high concentrations of impurities from the precursor gas incorporated into the films. We have demonstrated for the first time deposition of submicron Au films with r…
Construction of Chemical Potential Diagrams for Metal‐Metal‐Nonmetal Systems: Applications to the Decomposition of Double Oxides
A chemical potential diagram for A‐B‐O (A, B = metallic elements) systems has been constructed to make visually clear the thermodynamic stability of double oxides; the stability area of metallic elements, their binary oxides, and double oxides can be presented as convex polygons in a log ( a A / a B ) vs log P (O 2 )…
Dental Casting of Titanium and Ni-Ti Alloys by a New Casting Machine
The purpose of this study was to develop a new casting machine for titanium and Ni-Ti alloys. Properties of cast pure titanium and Ni-Ti alloys were studied by means of the tensile and casting tests. As gas in the mold was removed by the mold being heated under a high vacuum, the reaction between the molten metal and…
Electromagnetic-wave propagation in anisotropic stratified media
The electromagnetic field generated in a nonabsorbing anisotropic multilayer by a plane incident wave with given wave vector is considered. By taking into account the fact that the field within a given layer is a superposition of four proper waves, namely, four waves that propagate without changing their polarization…
Poly[(aryloxy)phosphazenes] with phenylphenoxy and related bulky side groups: synthesis, thermal transition behavior, and optical properties
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly[(aryloxy)phosphazenes] with phenylphenoxy and related bulky side groups: synthesis, thermal transition behavior, and optical propertiesHarry R. Allcock, Michael N. Mang, Alexa A. Dembek, and Kenneth J. WynneCite this: Macromolecules 1989, 22, 11, 4179–4190Publication Da…