The temperature dependence of the e.s.r. spectra of spin probes - fatty acid derivatives the nitroxyl fragments of which are incorporated into the surface and internal layers of phosphatidyl choline liposomes (T = 180-260 K) and also of a probe in a model ethanol solution (T = 110-220 K) has been measured. Analysis of the spectra yielded information on the nature and frequency of rotation of the nitroxyl fragments - probes. It is shown that in the systems studied the frequency of movement of the probes corresponds to the region of slow movements, i.e. does not exceed 107 sec-1.
|Number of pages||7|
|Journal||Biophysics (Russian Federation)|
|State||Published - 1 Dec 1987|
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