Centrifugation, Density Gradient

Centrifugations, Density Gradient; Density Gradient Centrifugation; Density Gradient Centrifugations; Gradient Centrifugation, Density; Gradient Centrifugations, Density
Separation of particles according to density by employing a gradient of varying densities. At equilibrium each particle settles in the gradient at a point equal to its density. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)