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Now showing items 11-20 of 24
Cation binding at the air-water interface by macromolecules bearing pendant crown ethers moieties
(American Chemical Society: Journal of the American Chemical Society, 1986-09-17)
In solution, the ion-binding characteristics of crown ethers and macromolecules containing macrocyclic ether moieties have been studied extensively. These ionophores are finding application in membranes, thin film sensors, ...
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 ...
Chemical alloying, a novel method for the preparation of homogeneous selenium-tellurium (SexTe1-x) alloys
(American Chemical Society: Journal of the American Chemical Society, 1984-11-14)
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 ...
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 ...
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 ...
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 ...
Hysteresis behavior in polyether poly(urethaneureas) based on 2,4-toluene diisocyanate, ethylenediamine, and poly(tetramethy1ene oxide)
(American Chemical Society: Macromolecules, 1979-05)
Poly(N-vinylcarbazole): A selective review of its polymerization, structure, properties, and electrical characteristics
(Wiley: Journal of Polymer Science: Macromolecular Reviews, 1978-05)
Effect of substituents on ring size in radical cyclizations. 1. Methyl vs. phenyl
(American Chemical Society: The Journal of Organic Chemistry, 1978-01-06)