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- Rotational_diffusion abstract "Rotational diffusion is a process by which the equilibrium statistical distribution of the overall orientation of particles or molecules is maintained or restored. Rotational diffusion is the counterpart of translational diffusion, which maintains or restores the equilibrium statistical distribution of particles' position in space.The random re-orientation of molecules (or larger systems) is an important process for many biophysical probes. Due to the equipartition theorem, larger molecules re-orient more slowly than do smaller objects and, hence, measurements of the rotational diffusion constants can give insight into the overall mass and its distribution within an object. Quantitatively, the mean square of the angular velocity about each of an object's principal axes is inversely proportional to its moment of inertia about that axis. Therefore, there should be three rotational diffusion constants - the eigenvalues of the rotational diffusion tensor - resulting in five rotational time constants. If two eigenvalues of the diffusion tensor are equal, the particle diffuses as a spheroid with two unique diffusion rates and three time constants. And if all eigenvalues are the same, the particle diffuses as a sphere with one time constant. The diffusion tensor may be determined from the Perrin friction factors, in analogy with the Einstein relation of translational diffusion, but often is inaccurate and direct measurement is required.The rotational diffusion tensor may be determined experimentally through fluorescence anisotropy, flow birefringence, dielectric spectroscopy, NMR relaxation and other biophysical methods sensitive to picosecond or slower rotational processes. In some techniques such as fluorescence it may be very difficult to characterize the full diffusion tensor, for example measuring two diffusion rates can sometimes be possible when there is a great difference between them, e.g., for very long, thin ellipsoids such as certain viruses. This is however not the case of the extremely sensitive, atomic resolution technique of NMR relaxation that can be used to fully determine the rotational diffusion tensor to very high precision.".
- Rotational_diffusion wikiPageID "10985744".
- Rotational_diffusion wikiPageLength "6923".
- Rotational_diffusion wikiPageOutDegree "36".
- Rotational_diffusion wikiPageRevisionID "649962425".
- Rotational_diffusion wikiPageWikiLink Angular_velocity.
- Rotational_diffusion wikiPageWikiLink Azimuth.
- Rotational_diffusion wikiPageWikiLink Biophysics.
- Rotational_diffusion wikiPageWikiLink Boltzmann_constant.
- Rotational_diffusion wikiPageWikiLink Category:Concepts_in_physics.
- Rotational_diffusion wikiPageWikiLink Dielectric_spectroscopy.
- Rotational_diffusion wikiPageWikiLink Diffusion.
- Rotational_diffusion wikiPageWikiLink Diffusion_equation.
- Rotational_diffusion wikiPageWikiLink Einstein_relation_(kinetic_theory).
- Rotational_diffusion wikiPageWikiLink Electric_dipole_moment.
- Rotational_diffusion wikiPageWikiLink Electrical_dipole_moment.
- Rotational_diffusion wikiPageWikiLink Equipartition_theorem.
- Rotational_diffusion wikiPageWikiLink Euclidean_vector.
- Rotational_diffusion wikiPageWikiLink False_diffusion.
- Rotational_diffusion wikiPageWikiLink Ficks_law_of_diffusion.
- Rotational_diffusion wikiPageWikiLink Ficks_laws_of_diffusion.
- Rotational_diffusion wikiPageWikiLink Flow_birefringence.
- Rotational_diffusion wikiPageWikiLink Fluorescence_anisotropy.
- Rotational_diffusion wikiPageWikiLink Magnetic_dipole_moment.
- Rotational_diffusion wikiPageWikiLink Magnetic_moment.
- Rotational_diffusion wikiPageWikiLink Moment_of_inertia.
- Rotational_diffusion wikiPageWikiLink Partial_differential_equation.
- Rotational_diffusion wikiPageWikiLink Perrin_friction_factors.
- Rotational_diffusion wikiPageWikiLink Principal_axis_(mechanics).
- Rotational_diffusion wikiPageWikiLink Probability_density_function.
- Rotational_diffusion wikiPageWikiLink Relaxation_(NMR).
- Rotational_diffusion wikiPageWikiLink Rotational_correlation_time.
- Rotational_diffusion wikiPageWikiLink Rotational_diffusion_tensor.
- Rotational_diffusion wikiPageWikiLink Sphere.
- Rotational_diffusion wikiPageWikiLink Spherical_coordinate_system.
- Rotational_diffusion wikiPageWikiLink Spherical_harmonics.
- Rotational_diffusion wikiPageWikiLink Spheroid.
- Rotational_diffusion wikiPageWikiLink Statistical_mechanics.
- Rotational_diffusion wikiPageWikiLink Time_constant.
- Rotational_diffusion wikiPageWikiLink Vector_(geometric).
- Rotational_diffusion wikiPageWikiLink Virus.
- Rotational_diffusion wikiPageWikiLink Viscosity.
- Rotational_diffusion wikiPageWikiLinkText "Rotational diffusion".
- Rotational_diffusion wikiPageWikiLinkText "rotational diffusion".
- Rotational_diffusion hasPhotoCollection Rotational_diffusion.
- Rotational_diffusion wikiPageUsesTemplate Template:Cite_book.
- Rotational_diffusion wikiPageUsesTemplate Template:Reflist.
- Rotational_diffusion subject Category:Concepts_in_physics.
- Rotational_diffusion hypernym Process.
- Rotational_diffusion type Election.
- Rotational_diffusion type Concept.
- Rotational_diffusion type Physic.
- Rotational_diffusion comment "Rotational diffusion is a process by which the equilibrium statistical distribution of the overall orientation of particles or molecules is maintained or restored. Rotational diffusion is the counterpart of translational diffusion, which maintains or restores the equilibrium statistical distribution of particles' position in space.The random re-orientation of molecules (or larger systems) is an important process for many biophysical probes.".
- Rotational_diffusion label "Rotational diffusion".
- Rotational_diffusion sameAs Difusão_rotacional.
- Rotational_diffusion sameAs m.02qx8n0.
- Rotational_diffusion sameAs Вращательная_диффузия.
- Rotational_diffusion sameAs Q4127028.
- Rotational_diffusion sameAs Q4127028.
- Rotational_diffusion wasDerivedFrom Rotational_diffusion?oldid=649962425.
- Rotational_diffusion isPrimaryTopicOf Rotational_diffusion.