Construction of proton nuclear magnetic resonance parameter database system.

Proton Nuclear Magnetic Resonance Spectroscopy

NUCLEAR MAGNETIC RESONANCE STUDY OF THE STRUCTURE OF GLYOXALDIHYDRAZONE

Study of the nuclear magnetic resonance spectra of glyoxaldihydrazone in dimethylsulfoxide and deuterochlorofonn leads to the conclusion that this compound exists predominantly in non-chelate structure

Proton nuclear magnetic resonance studies of isonitrile-heme protein complexes.

Steric interactions between bound ligand molecules and the valine E11 methyl groups of human hemoglobin and sperm whale myoglobin have been examined directly by high resolution NMR techniques. The methyl proton resonances of this amino acid are shifted markedly upfield and away from the bulk of the protein resonances by the shielding effect of circulating pi electrons in the porphyrin ring. We ...

Proton-enhanced 13C nuclear magnetic resonance of lipids and biomembranes.

A recently developed nuclear double resonance technique which permits sensitive detection, together with high resolution, of rare spins in solids or other dipolar-coupled nuclear systems [Pines, Gibby, and Waugh (1973) J. Chem. Phys. 59, 569] has been applied to the study of natural abundance (13)C-nuclear magnetic resonance in lipid mesophases and of selectively labeled carbon sites in bacteri...

Proton Nuclear Magnetic Resonance Study of Water in Flocs

Polymer/surfactant adsorption can lead to colloidal stability or particle flocculation, both of which are of importance in many industrial processes. Floc structure is one of the most important features of particle flocculation and this involves flOC-size, density and strength.1~ Spectroscopic techniques to investigate floc structure have been mainly limited to small-angle neutron scattering (S...