Kinetics of sedimentation in a density gradient

✍ Scribed by Menachem Dishon; George H. Weiss; David A. Yphantis

• Publisher: Wiley (John Wiley & Sons)
• Year: 1971
• Tongue: English
• Weight: 593 KB
• Volume: 10
• Category: Article
• ISSN: 0006-3525
• DOI: 10.1002/bip.360101107

✦ Synopsis

Two models of sedimentation in a density gradient are analyzed. The firht is f(ir sedimentation in cylindrical sector geometry and contains the assumption that diff i w i o i i can be neglected. The second treats sedimentation in a rectangular field and includediffusion, although the boundaries are not treated exactly. In both of these models we approximate the time dependence of the gradient by a relaxation form. We derive exact results for both models. It is also shown that the sedimentation coefficient can be calcnlated from data by following the motion of the position of the maximum (or minimum) of the concentration gradient.