sedimentation constant


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sedimentation constant

[‚sed·ə·mən′tā·shən ‚kän·stənt]
(physical chemistry)
A quantity used in studying the behavior of colloidal particles subject to forces, especially centrifugal forces; it is equal to 2 r 2(ρ-ρ′)/9η, where r is the particle's radius, ρ and ρ′ are reciprocals of partial specific volumes of particle and medium respectively, and η is the medium's viscosity.