Citations Only: Recent submissions
Now showing items 841-860 of 990
-
Double-layer effects on electrochemical kinetics in nonaqueous media. Dependence reactant charge for some metallocene redox couples.
(Elsevier: Journal of Electroanalytical Chemistry, 1985-05-10)The effect of altering the double-layer composition on standard rate constants, kob, for metallocene and related redox couples has been examined at mercury electrodes in dimethylformamide and acetonitrile containing ... -
Systematic inclusion of defects in pure carbon single-wall nanotubes and their effect on the Raman D-band
(Elsevier: Chemical Physics Letters, 2005-01-11)The Raman D-band feature (∼1350 cm[-][1]) is examined with 2.54 eV excitation for pure bulk carbon single-wall nanotube samples before and after treatments that increase defect densities. Upon employing mass-transport-limited ... -
Evaluating the purity of single-wall nanotube materials
(Materials Research Society: 2000 Fall Proceedings Symposium A: Nanotubes and Related Materials, 2001)Carbon single-wall nanotubes (SWNTs) have a variety of unique physical, electronic and mechanical properties. However, the SWNTs must be thoroughly purified if they are to be used in the wide array of projected applications ... -
Interconversion of conjugated and nonconjugated polyolefin cobalt complexes in two oxidation states: an electrochemical and NMR study
(The American Chemical Society: Journal of the American Chemical Society, 1986-11-26)The kinetics of interconversion between the conjugated (1,3) and nonconjugated (1,5) isomers of cyclooctatetraene (cot) complexes of CpCo [Cp = C5H5] 1 and *CpCo [*Cp = C5Me5] 2 have been studied. Dynamic NMR studies were ... -
Voltammetric determination of the ion-exchange behavior of poly(ester sulfonic acid) anionomers in acentonitrille
(The American Chemical Society: Analytical Chemistry, 1990-10-01) -
The MutT proteins or "Nudix" hydrolases, a family of versatile, widely distributed, "housecleaning" enzymes
(The American Society for Biochemistry and Molecular Biology: Journal of Biological Chemistry, 1996-10-11)Our studies on the biochemical basis of spontaneous mutations took an interesting and unexpected turn when we discovered that a small region of amino acid homology between the MutT protein of Escherichia coli and the MutX ... -
Ethylene propylene diene terpolymers produced with a homogeneous and highly active zirconium catalyst
(Wiley: Journal of Polymer Science: Polymer Chemistry Edition, 1985-08)EPDM terpolymers with ethylidene norbornene as diene monomer could be prepared by means of a soluble Ziegler catalyst formed from biscyclopentadienyl zirconium dimethyl and methylaluminoxane. The overall activities lie ... -
Analysis of thermodynamic and transport properties of La(2-x)MxCuO4 and YBa2Cu3O(7-delta) superconductors
(American Chemical Society, 1988-09-25)Anisotropic Ginzburg-Landau theory for coupled s-wave and d-wave order parameters is used to analyze the unique thermodynamic and transport properties of the new La(2-x)(Ba, Sr)xCuO4 and YBa2Cu3O(7-delta) superconductors. ... -
Colloidal particles derived from a complex of phosphotungstic acid and ethoxylated surfactants
(Elsevier: Journal of Colloid and Interface Science, 2002-09)Stable, colloidal sols of submicron size were prepared by titration of aqueous solutions of alkylene oxide surfactants with phosphotungstic acid, H3PW12O40 (PTA), followed by neutralization with ammonium or potassium ... -
Autoradiographic detection of antigens in cells using tritium-labeled antibodies
(The Histochemical Society: The Journal of Histochemistry and Cytochemistry, 1970-07)Immunoglobulins specific for cellular antigens of several types were treated with 3H-acetic anhydride in conditions which were shown to introduce three to four 3H-acetyl groups per molecule, with very high retention of the ... -
Zirconium pendent poly(amic acid) and polyimide based on 3,4'-ODA and ODPA
(The American Chemical Society: Polymer Preprints, 2000-03)Aromatic polyimides long been attractive for applications in the aerospace and electronic industries. But many polyimide materials are readily oxidized by atomic oxygen (AO) in low earth orbit (LEO) because neutral atomic ... -
EXAFS study of structural changes in Zr-doped polyimides
(The American Physical Society, 1998-03-16)Surfaces of spacecraft in low-earth orbit experience severe erosion by extremely reactive species, such as atomic oxygen (AO). Primary structural materials in spacecraft flight include durable polymer polyimides. To attempt ... -
A soluble linear Schiff-base coordination polymer containing eight-coordinate zirconium (IV)
(The American Chemical Society: Macromolecules, 1985-07)The first soluble linear Schiff-base heavy-metal coordination polymer has been synthesized via the condensation of 1,2,4,5-tetraaminobenzene and tetrakis(salicylaldehydato)zirconium(IV) in dry dimethyl sulfoxide. The (N, ... -
Plasma and beam facility atomic oxygen erosion of a transition metal complex
(Springer-Verlag: Plasma Chemistry and Plasma Processing, 1996-06)Glassy residues of the complex bis(N,N-disalicylidene-1,2-phenylenediamino)zirconium(IV), Zr(dsp)2, on glass slides were exposed to atomic oxygen in a plasma asher or an atomic beam facility for various amounts of lime in ... -
Synthesis and molecular structure of the eight-coordinate complex bis( 4-amino-N,N’-disalicylidene- 1,2-phenylenediaminato)zirconium( IV), a new reagent for preparing coordination polymers
(The American Chemical Society: Inorganic Chemistry, 1987-12-30)The precursor complex bis(4-nitro-N,N’-disalicylidene- 1,2-phenylenediaminato)zirconium(IV);Zr(ndsp)2, was synthesized from the appropriate Schiff-base ligand and zirconium tetra-n-butoxide butanol complex (2:1, respectively) ... -
Homogeneous polyimide films with increased bis(N,N'-disalicylidene-1,2-phenylenediaminato)zirconium(IV) content
(The American Chemical Society: Chemistry of Materials, 1997-12)To increase the concentration of inorganic component in polyimide films and enhance the materials' resistance to atomic oxygen, the complex (4-amino-N,N'-disalicylidene-1,2-phenylenediaminato)(N,N'-disalicylidene-1,2-phe ... -
Crystal and molecular structure of a dinuclear ortho-metalated platinum ylid complex, [Pt(u-Cl)CH3COCHP(C6H4)(C6H5)2]2*2CDCl3
(The American Chemical Society: Organometallics, 1983-10)The product of the reaction between PtCl2 and APPY (APPY = acetylmethylenetriphenylphosphorane, (C6H5)3PCHC(O)CH3), upon heating a 1:2 mole ratio at reflux in acetonitrile for 44 h, was originally formulated as Pt(APPY)2C12 ... -
Transition-metal eight-coordination. 13. Synthesis, characterization, and crystal and molecular structure of the schiff-base chelate bis( N,N'-disalicylidene- 1,2-phenylenediamino) zirconium(IV) benzene solvate
(The American Chemical Society: Inorganic Chemistry, 1979-10)As part of our program to elucidate eight-coordinate complexes and their polymeric counterparts we have isolated and structurally characterized the model Schiff-base chelate bis(N,N'-disalicylidene-1,2-phenylenediamino)z ... -
Phosphorus-31 NMR spectroscopy using a loop-gap resonator
(Elsevier: Journal of Magnetic Resonance, 1986-06-15)The loop-gap resonator provides a simple and convenient alternative for large volume probes that are now practical for applications to NMR spectroscopy. A 400 ml probe is described for use in a large-bore magnet which is ... -
Spin-lattice relaxation time measurements using hybrid CSI--phantom study
(Wiley: Magnetic Resonance in Medicine, 1990-03)The spin-lattice relaxation time T1 of multicomponent tissues is often determined by fitting relaxation data to monoexponential functions. This process can lead to large errors in the relaxation time. We describe a procedure ...