FIG. 6.

Safranin-O/fast green staining under visible light (a), picrosirius red staining under visible (b) and orange/red birefringence observed under polarized light (c) for scaffolds from Roll A of three different PLA crystallinities cultured for 28 days with hASCs. Scale bar represents 100 μm. Mean ± SD pixel intensity of orange/red birefringence at each assessed polarizer angle, with 45° (d) (n = 3) corresponding to the direction of the collector of the meltblowing apparatus. *Difference between mean pixel intensity and intensity at 0° polarizer angle for all blends, (p < 0.05, repeated measures ANOVA, Tukey post hoc test). Color images available online at www.liebertpub.com/tea