Figure 5From: Osteoblastic differentiation and stress response of human mesenchymal stem cells exposed to alternating current electric fields Cellular Activity. Normalized metabolic activity graphed as fluorescence intensity in arbitrary units (A.U.) vs Time. Statistical differences between time points are marked by a blue asterisk (p < 0.05) for the control group or a red asterisk (p < 0.05) for the stimulation group. Statistical differences are seen in the control group between day 5 - day 10 and between day 10 - day 15. Statistical differences are also seen in the stimulation group between day 5 - day 10 and between day 10 - day 15.Back to article page