| http://www.w3.org/ns/prov#value | - The apparatus of the present invention includes a centrifugal rotor which is capable of being mounted on a conventional laboratory centrifuge of the type which is commercially available from suppliers, such as Beckman Instruments, Inc., Spinco Division, Fullerton, Calif.; Fisher Scientific, Pittsburgh, Penna.; VWR Scientific, San Francisco, Calif., and the like.
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