Hydrodynamic Radius
Get Hydrodynamic Radius essential facts below. View Videos or join the Hydrodynamic Radius discussion. Add Hydrodynamic Radius to your PopFlock.com topic list for future reference or share this resource on social media.
Hydrodynamic Radius

The hydrodynamic radius of a macromolecule or colloid particle is . The macromolecule or colloid particle is a collection of subparticles. This is done most commonly for polymers; the subparticles would then be the units of the polymer. is defined by

where is the distance between subparticles and , and where the angular brackets represent an ensemble average.[1] The theoretical hydrodynamic radius was originally an estimate by John Gamble Kirkwood of the Stokes radius of a polymer, and some sources still use hydrodynamic radius as a synonym for the Stokes radius.

Note that in biophysics, hydrodynamic radius refers to the Stokes radius,[2] or commonly to the apparent Stokes radius obtained from size exclusion chromatography.[3]

The theoretical hydrodynamic radius arises in the study of the dynamic properties of polymers moving in a solvent. It is often similar in magnitude to the radius of gyration.[4]

Notes

  1. ^ J. Des Cloizeaux and G. Jannink (1990). Polymers in Solution Their Modelling and Structure. Clarendon Press. ISBN 0-19-852036-0. Chapter 10, Section 7.4, pages 415-417.
  2. ^ Harding, Stephen (1999). "Chapter 7: Protein Hydrodynamics" (PDF). Protein: A comprehensive treatise. JAI Press Inc. pp. 271-305. ISBN 1-55938-672-X.
  3. ^ Goto, Yuji; Calciano, Linda; Fink, Anthony (1990). "Acid-induced unfolding of proteins". Proc. Natl. Acad. Sci. USA. 87: 573-577. doi:10.1073/pnas.87.2.573. PMC 53307. PMID 2153957.
  4. ^ Gert R. Strobl (1996). The Physics of Polymers Concepts for Understanding Their Structures and Behavior. Springer-Verlag. ISBN 3-540-60768-4. Section 6.4 page 290.

References

Grosberg AY and Khokhlov AR. (1994) Statistical Physics of Macromolecules (translated by Atanov YA), AIP Press. ISBN 1-56396-071-0


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

Hydrodynamic_radius
 



 



 
Music Scenes