| 摘要 |
The invention relates to a system (700) for treating molecules or particles of interest carried by a viscoelastic liquid, which includes: a means (715) for establishing a laminar flow, during at least one portion, referred to as "concentration phase", of the operating time of the system, of the viscoelastic liquid in a concentration, stacking and/or purification device (705), said device including a concentration area having, in the direction of said flow, an intake cross-section surface that is larger than the cross-section surface of each outlet channel, and a means (725) for applying an electric field between the intake and the outlet of the concentration area during the concentration phase, the action of the electric field on the molecules or particles of interest being, in the concentration area, opposite to the direction of said flow and causing the molecules or particles of interest to be retained at least in the concentration area; which also includes a modulation means (730) configured to control the means for applying the electric field in order to apply, after the concentration phase, an electric field with intensity other than zero and lower than the intensity of the electric field applied during the concentration phase. |
