Spin Reorientation
Mostrando 13-14 de 14 artigos, teses e dissertações.
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13. Thermodynamics and dynamics of phosphatidylcholine-cholesterol mixed model membranes in the liquid crystalline state: effects of water.
A method for obtaining the thermodynamic activity of each membrane component in phosphatidylcholine (PC)/cholesterol mixtures, that is based upon ESR spin labeling is examined. The thermodynamic activity coefficients, gamma PC and gamma chol, for the PC and cholesterol, respectively, are obtained from the measured orientational order parameters, SPC and S(ch
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14. Phospholipid Reorientation at the Lipid/Water Interface Measured by High Resolution 31P Field Cycling NMR Spectroscopy
The magnetic field dependence of the 31P spin-lattice relaxation rate, R1, of phospholipids can be used to differentiate motions for these molecules in a variety of unilamellar vesicles. In particular, internal motion with a 5- to 10-ns correlation time has been attributed to diffusion-in-a-cone of the phosphodiester region, analogous to motion of a cylinder
The Biophysical Society.