FIG. 4.

Profile of the intensity counts versus refractive index decrement δ. The integrated areas of the peaks on the left side (X-value ∼140–145) correspond to the PGA/PLLA volume in scaffolds cultured with ECFC and MSH 133+ cells: their values are comparable. The peaks on the right side (X-value ∼185–190) are the contrast produced after culture: the contrast generated by MSH 133+ cells over 14–21 days of culture is negligible compared with that produced by ECFCs over 6–12 days on the same PGA-PLLA scaffold. Color images available online at www.liebertpub.com/tec