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Field-cycling and conventional proton relaxation spectroscopy in the frequency range 104 ≤ v ≤ 3·108 Hz have been applied to diverse lyophilized and D2O-hydrated globular proteins and poly-L-alanine. An overall T1-dispersion T1 ∼ v0.75±0.05 has been found.This v3/4-law is tentatively interpreted by a double-diffusive fluctuation mechanism.
Molecular dynamics in n-dodecylammonium chloride/water solutions for concentrations of 34 and 45wt% was studied by 2 H NMR and by 1 H NMR dispersion of spin-lattice relaxation in the 2kHz-90MHz frequency range. The system exhibits a number of lyotropic liquid crystalline phases, which differ in symmetry and involve motions characterized by a wide frequency scale. The analysis of ...
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