92168.pdf

34 Kinetic properties

2h 25h

Figure 2.7 Sedimentation of a monodispersed sample of Limulus haemocyanin

measured by the Philpot-Svenson schlieren method (18 000 rev min~l)^32 (By courtesy

of the American Chemical Society)

and, since Df-kT,

dx _ mD(l- vp)o)^2 x

dt kT

MD(\-vp)o)

2

x

RT

or M -•

RTs

D(l-vp)

(2.16)

where M is the molar mass (unsolvated) and s the sedimentation

coefficient

dx/dt

Integrating,

In x 2 lx\

a>^2 (t 2 -ti,

(2.17)