Figure 1From: Substrate-dependent gene regulation of self-assembled human MSC spheroids on chitosan membranesSurface properties of cell culture substrates. (A) The static contact angle of CS and TCPS. (B) The surface zeta potential of CS and TCPS. (C) The amount of surface-bound calcium on CS or TCPS after being soaked in the culture medium for 24 h without cells. * P < 0.05 among the indicated groups (n = 3).Back to article page