Citations Only: Recent submissions
Now showing items 701-720 of 990
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Use of shift reagents for nuclear magnetic resonance studies of the kinetics of ion transfer in cells and perfused hearts
(Lipincott, Williams and Wilkins: Circulation, 1985-11) -
23Na and 39K nuclear magnetic resonance studies of perfused rat hearts. Discrimination of intra- and extracellular ions using a shift reagent
(Biophysical Society: Biophysical Journal, 1985-07)High-resolution 23Na and 39K nuclear magnetic resonance (NMR) spectra of perfused, beating rat hearts have been obtained in the absence and presence of the downfield shift reagent Dy(TTHA)3- in the perfusing medium. Evidence ... -
Colloidal iron dispersions prepared via the polymer-catalyzed decomposition of iron pentacarbonyl
(American Chemical Society: Journal of Physical Chemistry, 1980-06-12)Stable colloidal dispersions (50-150 A) of zero-valent iron have been prepared by the thermolysis of Fe(CO)5 in dilute solutions of “functional” polymers. The formation of these colloidal dispersions has been rationalized ... -
Extracellular volume and transsarcolemmal proton movement during ischemia and reperfusion: a 31P NMR spectroscopic study of the isovolumic rat heart
(Wiley: NMR in Biomedicine, 1993-07)We have measured, directly and simultaneously, changes in extracellular volume and intra- and extracellular pH during ischemia in the isolated rat heart using 31P NMR spectroscopy. Hearts were perfused with buffer containing ... -
Modulation of refractive index in polymer composites: toward a synthetic bio-optic lens
(SPIE: Proceedings of SPIE, 2003-07)As an option in the creation of a synthetic bio-optic lens, we propose that spatial modulation of refractive index can be realized in polymer composites containing a colloidal ionophoric phase. The variation of refractive ... -
Dielectric spectroscopy of polystyrene/poly(ethylene oxide) composites
(American Chemical Society: Macromolecules, 1996-07-01)The effect of incorporating poly[styrene-b-(ethylene oxide)], PS-b-PEO into PS/PEO composites has been examined microscopically and dielectrically. The addition of block copolymer stabilizes the dispersion of PEO in PS and ... -
Poly(N-vinylcarbazole): A selective review of its polymerization, structure, properties, and electrical characteristics
(Wiley: Journal of Polymer Science: Macromolecular Reviews, 1978-05) -
Functional polymers in the generation of colloidal dispersions of amorphous selenium
(American Chemical Society: Macromolecules, 1980-09)Stable colloidal dispersions of red, amorphous selenium have been prepared by the reduction of selenious acid in dilute aqueous solutions of hydrazonium polyacrylate. The initially formed particles average 1000-1200 A, in ... -
Voltammetric behavior of poly(vinylferrocene)
(Wiley: Journal of Polymer Science: Polymer Chemistry Edition, 1976-10)A voltammetric analysis of the electron-transfer process in poly(vinylferrocene) (PVF) has been carried out; the results indicate that the electrochemical behavior of ferrocene and PVF are quite similar. The field effects ... -
Aqueous shift reagents for high-resolution cationic nuclear magnetic resonance. III. Dy(TTHA)3−, Tm(TTHA)3−, and Tm(PPP)27−
(Elsevier: Journal of Magnetic Resonance, 1984-01)The isotropic hyperfine shifts induced in the 23Na+ resonance by the shift reagents Dy(DPA)33−, Dy(NTA)23−, Dy(PPP)27−, Tm(PPP)27−, Dy(TTHA)3−, and Tm(TTHA)3− are compared under similar conditions. The last three are ... -
Properties of segmented polyether poly(urethaneureas) based of 2,4-toluene diisocyanate. 2. Infrared and mechanical Studies
(American Chemical Society: Macromolecules, 1980-01): IR spectra of two series of polyether poly(urethaneureas) based on 2,4-toluene diisocyanate, ethylenediamine, and either 1000 or 2000 molecular weight poly(tetramethy1ene oxide) were examined first to elucidate the state ... -
Effect of substituents on ring size in radical cyclizations. 1. Methyl vs. phenyl
(American Chemical Society: The Journal of Organic Chemistry, 1978-01-06) -
Dielectric spectroscopy of binary polystyrene/poly[styrene-b-(ethylene oxide)] blends and ternary composites of polystyrene/poly[styrene-b-(ethylene oxide)] swollen with homopoly(ethylene oxide)
(American Chemical Society: Macromolecules, 1996-07-01)The effect of incorporating poly[styrene-b-(ethylene oxide)], PS-b-PEO into PS/PEO composites has been examined microscopically and dielectrically. The addition of block copolymer stabilizes the dispersion of PEO in PS and ... -
Swelling of copolymer micelles by added homopolymer
(American Chemical Society: Macromolecules, 1994-08-15)We present a simple theory and a supporting experimental study of the extent to which block copolymer micelles in a homopolymer matrix can be swollen by relatively low molecular weight homopolymer which is compatible with ... -
Adsorption of a polymeric siloxane surfactant on carbon black particles dispersed in mixtures of water with polar organic solvents
(Elsevier: Journal of Colloid and Interface Science, 2002-11-01)The adsorption of a rake-type polymeric siloxane surfactant (polydimethylsiloxane-graft-polyether copolymer) on carbon black (CB) particles dispersed in mixtures of water with polar organic solvents (ethanol, formamide, ... -
The Esterolytic activity of poly(N-alkylimidazoles) in ethanol-water. The poly(1-methyl-5-vinylimidazole)-catalyzed hydrolysis of p-nitrophenyl acetate and 3-nitro-4-acetoxybenzoic acid
(American Chemical Society: Macromolecules, 1975-07)1-Methyl-4-vinylimidazole (1-Me-4-VIm) and 1-methyl-5-vinylimidazole (1-Me-5-VIm) have been synthesized and polymerized. The esterolytic activity of these polymers in 28.5% ethanol-water toward p-nitrophenyl acetate (PNPA) ... -
BioMoleculesAlive.org: the biochemistry and molecular biology digital library
(Elsevier: Biochemistry and Molecular Biology Education, 2003-01) -
BioMoleculesAlive.org: the biochemistry and molecular biology digital library update
(Elsevier: Biochemistry and Molecular Biology Education, 2003-03)BioMoleculesAlive.org is a collection of digital resources sponsored by the American Society for Biochemistry and Molecular Biology. It is part of a larger effort called the BioSciEdNet (BEN) initiative (www.biosciednet.org). ... -
BioEditor—simplifying macromolecular structure annotation
(Oxford University Press: Bioinformatics, 2003-05-01)Summary: BioEditor is an application to enable scientists and educators to prepare and present structure annotations containing formatted text, graphics, sequence data, and interactive molecular views. It is intended to ... -
Nucleic acids: Sequences and topology
(Elsevier: Current Opinion in Structural Biology, 2002-06-01)