Figure 4: Resistance monitoring of hMSC layers during the cultivation with or without the neural differentiation factor. The resistances of cells were measured every 5 min with an input current of 1 μA at 16 kHz, and the average of normalized resistances was displayed. Arrows indicate the time points of media change. Error bar are indicating the standard deviation of the three different experiment (NGM: normal growth media, ; NIM: neural induction media, ; NDM: neural differentiation media, ).