## Abstract Excitation by conventional B~1~ pulses in surface coil chemical‐shift imaging experiments yields resonance intensities that vary greatly with position. B~1~ compensated semi‐selective pulses overcome much of this problem. These pulses are employed for excitation and refocusing in ^1^H N
Temperature Imaging by1H NMR and Suppression of Convection in NMR Probes
✍ Scribed by N. Hedin; I. Furó
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 104 KB
- Volume
- 131
- Category
- Article
- ISSN
- 1090-7807
No coin nor oath required. For personal study only.
✦ Synopsis
A simple arrangement for suppressing convection in NMR infinitely long tube. The Rayleigh number Ra for these two probes is tested experimentally. Diffusion experiments are used to limiting cases can be expressed as determine the onset of convection and 1 H temperature imaging helps to rationalize the somewhat surprising results. A convenient new 1 H NMR thermometer, CH 2 Br 2 dissolved in a nematic thermo-
tropic liquid crystal, is presented.
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The authors acknowledge the constant assistance of \(P\). Fellmann and the help of A. Maftah and A. Zachowski in the bovine heart mitoplast sample preparation. D.E.W. thanks D. Lévy and M. Seigneuret for helpful discussions about the DANTE-Z sequence and advice on spectrometer operation. D.E.W. was