✦ LIBER ✦

E.S.R. Studies of nitroxide probes in lecithin-water systems

✍ Scribed by M.D. Barratt; D.K. Green; D. Chapman

Publisher: Elsevier Science
Year: 1969
Tongue: English
Weight: 182 KB
Volume: 3
Category: Article
ISSN: 0009-3084
DOI: 10.1016/0009-3084(69)90004-8

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✦ Synopsis

The molecular motion of a nitroxide free-radical probe in lecithin and lecithin-water systems has been studied as a function of temperature. In the lecithin-water system a significant decrease in the motion of the probe is observed on crystallisation of the hydrocarbon chains. At temperatures above the chain-melting point increase in the water content, up to about 25 % water, produces an increase in the tumbling rate of the probe. At higher water content the probe motion remains approximately constant.

Addition of cholesterol to the lecithin-water systems decreases the motion of the probe and decreases its solubility in the lipid.

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