Fig. 3
Mixing of fluorescein-labeled medium with non-labeled medium at different input flow rate ratios. a Total fluorescence was measured in a square region in the main channel downstream of the mixing serpentines as the input ratio was changed in a stepwise manner from 0% fluorescein input to 100% fluorescein input (up: blue) and back to 0% fluorescein input again (down: red). The fluorescence measured for the mixture relative to the fluorescence measured for pure fluorescein-labeled medium (Syringe 2 only) is plot against the input of Syringe 2 as a fraction of the total input from both Syringes 1 and 2. b Normalized fluorescence along a section through the main channel downstream of the mixing serpentines at different mixing ratios
