Figure 6.

Biological activity of the hydrogel: (a) average diameter of inhibition zones of S. aureus, C. albicans, and P. aeruginosa and (b) corresponding photos of the dishes; (c) ability of S. aureus and P. aeruginosa to colonize the molded (S) and 3D-printed (3DP) hydrogel samples. An exponent “a” corresponds to 9 and 6 for S. aureus and P. aeruginosa, respectively; “cf” means colony-forming; (d) viability of fibroblasts exposed to medium conditioned with extracts from the analyzed sample and ethanol (negative control). Absorbance at 490 nm measured for unexposed fibroblasts (C) was considered 100% (black dashed line); * p < 0.05.