✦ LIBER ✦

The orientation dependence of deuterium transverse relaxation rates obtained from unoriented model membrane systems

✍ Scribed by F. Volke

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 330 KB
Volume: 112
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(84)85776-0

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✦ Synopsis

A quadrupolar-ccbo Fourier transform&ion technique ~3s used to ~CZQWZ Tz IS a funcrion of director orientation in model membrane systems from powder spectra with residual quadrupolar splittings. Tbc relaxation function is exponenttil for nil systems nnd orientrrtions, giving rise to Lorcntzian-broadened Pake doublet lines. From the relaxation time profile versus director orientation, Lonclusions ilze drawn about molecular motions along, curved surfaces. An sdvmtagc of this technique is that no macroscopic orienration of mcmbrdnc systems between glass plates is necessary.

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RapId lateral diffunon of phosphohpld molecules III multllamellar dispersions IS shown to prevent the observation. III powder pattern spectra, of the onentatton dependence of \*H nuclear magneuc spin-lattice relaxation. The spm-lattice relaxatton rate is found to have a frequency dependence suggesti