Figure 4. The labelling for the horizontal axis of this graph is misleading. As correctly mentioned in the figure legend in the paper, for TiO2 the effects were compared during processing of the comet assay either in the dark or under normal interior light. For all other samples effects were evaluated only after processing in the dark. Thus, the correct labelling of the samples on the horizontal axis (from left to right) should be:
“ctr”/“ZnO”/“TiO2”/“TiO2 + interior light”/“MgO”/“SiO2/“CB”.
The original figure (as submitted to the journal) was: