Figure 2.

Characterizations of electrospun PLGA nanofiber. The PLGA nanofiber matrix with (a) a random or (d) an aligned structure was observed unser SEM. (b,e) SEM images of nanofibers were converted to an integer power of 2 pixel dimensions and greyscale for 2D FFT analysis. (c) No regularity of fiber alignment in random mesh samples. (f) Two peaks at 180° and 360° were found on the plot of the aligned nanofibers. The hASCs on the aligned PLGA nanofibrous meshes had (g) a significantly higher viability (p < 0.05) and (h) a higher amount of ECM content relative to that of the random ones at day 7.