Hydrodynamic interaction effects on spherical macroion diffusion

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Abstract
Hydrodynamic interactions are shown to contribute a term of order one third in volume concentration (φ) to the mutual frictional coefficient of spherical macromolecule solutions when the static structure factor is held constant. A cell‐model calculation indicates a leading term in the expression for the fractional increase of the friction coefficient due to strong repulsion of (9/8)φ1/3.