Figure 2.

Relative concentration ratio (expressed as a percentage) of 1 µM Nile red in ethanol/PBS (1:3 v/v) that remained in solution following continuous flow through PDMS microchannels at 400 µL∙h⁻¹ or 1000 µL∙h⁻¹. Values show Mean ± SD from at least three independent measurements (** $p<0.01$).