= Rate-zonal centrifugation
<Rate-zonal centrifugation> resolves an initially narrow sample zone by differences in <sedimentation coefficient> during a finite interval. Its bands remain transient: extending the interval can carry material into a <centrifugation pellet>. Thus a <density gradient> need not imply an equilibrium <buoyant density> measurement.https://www.beckman.com/resources/technologies/centrifugation/density-gradient-centrifugation/[Types of Density Gradients, Rate Zonal Centrifugation and Table 1: migration rates before equilibrium or complete sedimentation]{ref}
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