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. 2012 May 29;7:2591–2600. doi: 10.2147/IJN.S29629

Figure 4.

Figure 4

(A) Three different food dye solutions were injected into microchannels before performing wash steps. (B) Images of channels before and after wash steps indicated that food dye was removed from microchannels at a flow rate of 2 μL/minute.