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. 2011 Jan 12;12(1):015001. doi: 10.1088/1468-6996/12/1/11660947

Figure 2.

Figure 2.

SEM images of PLLA mats electrospun at a traveling distance of 15 cm, needle diameter of 0.50 mm, applied voltage of 20 kV and a flow rate of 1 ml h−1 (a), 2 ml h−1 (b), 4 ml h−1 (c) and 8 ml h−1 (d). The scale bar corresponds to 20 μm.