Abstract
In this work, the feasibility of separating and characterizing cell populations by steric field-flow fractionation (steric FFF) is demonstrated by application to fixed human and avian red cells, fresh blood from several species, and viable HeLa cells. The basis for this work is established by means of a discussion of the role of steric FFF in the broad family of field-flow fractionation techniques. The behavior of steric FFF is then characterized by application to standard polystyrene latex beads and to fixed red blood cells. Studies of these standards and of the other cells noted under various conditions of field strength and flow velocity are used to improve the separation conditions and approach optimization. It is shown that the fixed human and avian red cells can be separated in a time of less than 15 min. In addition, it is shown that HeLa cells maintain their viability after passage through the separation channel.
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