Imperforate bowl: centrifugal separators – Process
Patent
1996-04-24
1998-06-09
Cooley, Charles E.
Imperforate bowl: centrifugal separators
Process
494 10, B04B 1300
Patent
active
057625980
ABSTRACT:
A fixed-angle rotor, having a centrifuge tube inclined at a predetermined gradient angle with respect to a rotational axis, is used to obtain a sedimentation coefficient of sample particles. In one method, a distance in the centrifugal direction is corrected by the gradient angle .theta. of centrifuge tube 1. Sedimentation coefficient S.sub.20,W is calculated based on the corrected distance, and then the sedimentation coefficient S.sub.20,W is multiplied with sin(.theta.) to obtain a corrected sedimentation coefficient. In another method, a distance in the centrifugal direction is corrected by the gradient angle .theta., and also an angular acceleration .omega..sup.2 is corrected by dividing it by sin(.theta.). And then, the sedimentation coefficient S.sub.20,W is calculated based on thus corrected distance and corrected angular acceleration.
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patent: 3009388 (1961-11-01), Polanyi
patent: 4941868 (1990-07-01), Chulay et al.
patent: 5024646 (1991-06-01), Lewis et al.
patent: 5171206 (1992-12-01), Marque
patent: 5370599 (1994-12-01), Marque et al.
"Centrifugation (2.sup.nd Edition), a practical approach", Edited by D. Rickwood.
Humphries Steven
Rickwood David
Spragg Peter
Tokunaga Kazuyoshi
Yotsuyanagi Mitsutoshi
Cooley Charles E.
Hitachi Koki Co,. Ltd.
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