Thus, the rotational time correlation function of the CH 3 and CH 2 groups contain a residuum term stemming from the slow motion within the same molecule. The data show a threshold of the rotational energy which has to be exceeded in order to make the effect observable....
is the usual time correlation function of a Legendre polynomial of order ℓ. Note that τ(n)∝J(0), the zero-frequency component of the corresponding spectral density function. This correlation time is related to a “local” or effective diffusion constant by: (8)dloc(n,ℓ)≡1ℓ(ℓ...
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A new NMR method for measuring the rotational correlation time of molecules in the liquid stateCH3OCH2NITROGEN BASESPROTONATED IMINESA method is described for the measurement of the steady-state nuclear magnetization under strong off-resonance RF irradiation as a function of the angle between the ...
Fig. 9.5 shows the plot of translational rmsd2 displacements as a function of time; the meaning is immediate, in that more viscous liquids have lower diffusion coefficients. Fig. 9.6 shows the trend of rotational correlation, opposite to that of diffusion: thinner liquids lose rotational memory ...
At = 501 amagat and T = 263 K, both time correlation function and spectral moments compare well with the molecular dynamics results obtained in the site-site model of induced interactions. The evolution of the normalized second moment is analysed. At low density induced and rotational distinct ...
Time FactorsOptical anisotropy data spanning a very wide time range are analyzed using a recently developed theory for filamentous macromolecules that can bend, twist, and also admit overdamped local libration (or wobble) of the chromophore. A rapid relaxation in the fluorescence polarization anisotropy...
The correlation function of the depolarized scattered intensity contains both the translational and rotational self-diffusion coefficients Ds and Dr. The DDLS measurements allow derivation of the dependence of Ds and Dr on the volume fraction and on the ionic strength. In particular, the experimental ...
Cumulative rotation angle β of a soft vesicle as a function of time t for various area fractions of active particles (ρ) with an angular velocity of ω = 0.04 (a) and for various angular velocities (ω) with an area fraction of ρ = 0.6 (b). The inset figure is a ...
The hemoglobin (Hb) rotational correlation time is 2.2 longer in the cell than in solution. Because both the overlapping Hb and Mb signals are visible in vivo, a relaxation-based NMR strategy has been developed to discriminate between them. 展开 关键词:...