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. 2018 Sep 12;6:127. doi: 10.3389/fbioe.2018.00127

Figure 1.

Figure 1

HELP-PLLA composite design. (A) Schematic description of the experimental approach; (B) Representative images of different protein aqueous solutions 0.5 min after deposition on PLLA matrix. Bar is 5 mm; (C) Stabilization effect of the HELP cross-linking process (CRLK) compared to simple deposition of the protein (free) on PLLA matrix: representative images of unwashed and washed samples, Amidoblack staining. Bar is 5 mm. Evaluation of sample stability after washing is reported in the histogram. Each value represented the mean ± SD, n = 3. Differences between free and cross-linked samples after extensive washing were assessed by one-way ANOVA, ***p < 0.001 compared to unwashed samples.