The magnetic field dependence of the water-proton spin-lattice relaxation rate (1/T(1)) in tissues results from magnetic coupling to the protons of the rotationally immobilized components of the tissue. As a consequence, the magnetic field dependence of the water-proton (1/T(1)) is a scaled report o
Field-dependence of 13C spin relaxation times. The concept of time-dependent correlation times
โ Scribed by David M. Doddrell; David T. Pegg; M. Robin Bendall; Daniel M. Thomas
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 288 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
in order to justif_v tile nrxthemztical postulate of 3 distribution of correI~tion &es, the concept of time-dependen; COTrehtion times is introduced_ The time dependence arises beause molecules may chmae slope during nuclear relxution_ The model m3y be used to explain qualit&vely tire fieId dependence of the temperature dependence of 13C TI values in isopropyl alcohol.
I _ introduction
Nuclear spin rel3sation times in solutions are
๐ SIMILAR VOLUMES
The proton spin-spin rebxation time for liquid chloroform has been measured over the temperature range -54" to +9O"C. The values of Ta(H) decrease with increasing temperature contrary to the behavior obsemed for Tr (H). Values of Tz (I-l) calculated from experimental values of Tr (H) and Tz(Cl) repr
The "C spin-lattice relaxation times and nuclear Overhauser enhancements of protonated carbons in 1,3,5tribromobenzene were measured in a number of solvents of widely varying viscosity. Derived reorientational correlation times were found to increase approximately linearly with solution viscosity, a