Fig. 4
Percentage of Chlamydomonas reinhardtii cells with damaged membranes following exposure to increasing concentrations (1, 5, 10 and 20 mg/L) of a Au, b Pt, c Pd, d Ag and e CuO nanoparticles after 1, 3, 5 and 24 h. The error bars represent the standard deviation of repeated experiments using duplicate samples. Note different y-axis scales for Au and Pt