Fig. 4
From: Direct electrophoretic microRNA preparation from clinical samples using nanofilter membrane
Stability during and after the electrophoretic preparation experiments. a Ionic currents during 30 min, b the chambers after 30 min, and c pH changes of solutions in the reservoir chamber (Res) and the collection chamber (Col) after 30-min experiments with the initial buffer pH (TE) under 2, 5, 10 V conditions. The measured pH values were labeled on each pH meter paper strip