Stem cells need to be recovered from a dilute aqueous suspension. When the suspe

Question

Stem cells need to be recovered from a dilute aqueous suspension.   When the suspension is placed in a closed vial standing on a laboratory table, it takes the suspended cells two weeks to settle 1 cm toward the bottom of the container under the influence of gravity. Suppose the same suspension is placed in a batch tubular centrifuge with an inner radius r1 of 1 cm, an outer radius r2 of 2 cm, and a rotational speed of 2000 rpm. How long should the centrifuge be operated in order to recover 90% of the cells?

Explanation / Answer

2000 rpm for 15 minutes.

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