In article <H000020002270a73@MHS>, [log in to unmask] wrote in part: >We have a 24 place rotor for Eppendorf tubes and run at 28000 rcf for >10 min at 15 centigrades. > Excuse me - what are rcf and centigrades ? Robin Marks Halifax \/ \/ \/ \/ \/ \/ \/ /\____/\____/\____/\____/\____/\____/\____ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%