Metal-Ligand Recognition Index Determination by NMR Proton Relaxation Study

A proton NMR relaxation study of hen egg quality.

A quantitative analysis of NMR proton relaxation in hen egg albumen and yolk is undertaken to research the causes of quality loss during the first few days of storage and to access the feasibility of an on-line NMR sensor of internal egg quality. It is shown that the change in the transverse relaxation in thick egg albumen mainly results from an increase in proton exchange rate resulting from a...

Proton NMR relaxation times in ischemic brain edema.

The state of water in cerebral ischemia was studied by using the proton nuclear magnetic resonance (1H-NMR) method. Cerebral ischemia was induced experimentally in Mongolian gerbils by unilateral ligation of the common carotid artery. Longitudinal (T1) and transverse (T2) relaxation times of the ischemic brain were measured with a pulse FT-NMR spectrometer and the water content was determined b...

3.1 Dipolar Residual Coupling and Proton NMR Relaxation

Proton nmr relaxation study of the dynamics of anthopleurin-A in solution.

Spin-spin and spin-lattice 1H-nmr relaxation times of the sea anemone polypeptide anthopleurin-A were measured at frequencies of 200, 300, 400, and 500 MHz. Relaxation times were fitted iteratively by least squares regression to the isotropic tumbling model, Woessner's model for anisotropic motion, and Lipari and Szabo's "model-independent" model. Data for aromatic and aliphatic methine protons...

High resolution NMR study of T₁ magnetic relaxation dispersion. IV. Proton relaxation in amino acids and Met-enkephalin pentapeptide.

Nuclear Magnetic Relaxation Dispersion (NMRD) of protons was studied in the pentapeptide Met-enkephalin and the amino acids, which constitute it. Experiments were run by using high-resolution Nuclear Magnetic Resonance (NMR) in combination with fast field-cycling, thus enabling measuring NMRD curves for all individual protons. As in earlier works, Papers I-III, pronounced effects of intramolecu...