Fig. 3From: Effective combination of biocompatible zinc oxide nanocrystals and high-energy shock waves for the treatment of colorectal cancerCytotoxicity of ZnO NCs and Fe:ZnO NCs on HT-29 (A) and Colo 320DM (B) at different concentrations (0–5–10–15–20–30 µg/ml) and time points (24 and 48 h) measured with the WST-1 assay. Data are expressed as percentage of cell viability mean ± SEM. n ≥ 3. Statistical relevance is indicated in comparison with control sample (* p < 0.05, ** p < 0.01, *** p < 0.001)Back to article page