Comparison With Theory

To check the theoretical prediction for the nonequilibrium enhancement of the concentration fluctuations, as given by Eq. (4), we need in addition to D and ST also values for the kinematic viscosity v and for (dp/dw)p,T. The latter quantity is related to the concentration derivative of the osmotic pressure [22] which can be deduced from information provided by Noda et al. [31,32]. To obtain the kinematic viscosity v = ^/p the concentration dependence of the shear viscosity ^ can be represented by the Huggins relation

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