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. 2020 Apr 4;12(4):325. doi: 10.3390/pharmaceutics12040325

Figure 2.

Figure 2

SEM microphotographs of chitosan-based (CH), chitosan/chondroitin sulfate-based (CH/CS) and chitosan/hyaluronic acid-based (CH/HA) scaffolds loaded with 1% or 2% norfloxacin, as a free drug (1% N or 2% N), or in VHS-N nanocomposite. In each image, the nanofiber diameters (nm, mean values ± SD; n = 30) and Si content for hybrid scaffolds are reported. Statistics: Mann–Whitney (Wilcoxon) W test p < 0.05: CH2H vs. CH/CS2H; CH/CS2H vs. CH/HA2H; CH/HA1H vs. CH/HA2H; CH/HA2H vs. CH/HA2N (scale bar 5 μm).