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. 2020 May 13;9(5):1207. doi: 10.3390/cells9051207

Figure 1.

Figure 1

Morphological characteristics of the electrospun PLGA microfibers. (A,B) SEM micrographs of PLGA with 1.27 ± 0.11 µm (ha1-PLGA) and 2.5 ± 0.27 µm (ha2-PLGA) highly aligned fibers showing defect-free fleeces (n = 3 for each type of fleece). Scale bars = 10 µm. (C) Frequency distribution of fiber orientation within ha1- and ha2-PLGA fleeces. Fibers of both PLGA fleeces show a sharp Gaussian curve with an orientation angle mainly ranged between −10° to +10° with a statistically significant high fiber alignment in the case of the fibers with small fiber diameter size (ha1-PLGA, p < 0.05) (n = 3 for each type of fleece).