Figure 20.

Human breast adenocarcinoma (MDA-MB-231). Biocompatibility with 0A, 70A, 0B, and 70B and 0C and 70C chitosan–cellulose hydrogel beads over 48 h. Values are expressed as percentage of the means ± SD (n = 4). The statistical significance was defined as *P < 0.05, **P < 0.01,***P < 0.005 compared to control samples (ANOVA test). Black * and red * indicate sample comparisons to negative and positive controls, respectively. Green * shows comparisons among 0A–70A, 0B–70B, and 0C-70C, and blue * shows comparisons among 70A–70B, 70A–70C, and 70B–70C. A, Acetic acid; B, HCl; and C, H₂SO₄. 0 refers to 0% initial chitosan content, and 70 refers to 70% chitosan content in the composite.