Figure 3 from: Novak S, Drobne D, menard a (2012) Prolonged feeding of terrestrial isopod (Porcellio scaber, Isopoda, Crustacea) on TiO2 nanoparicles. Absence of toxic effect. ZooKeys 176: 261-273. https://doi.org/10.3897/zookeys.176.2463

Figure 3 - Percentage of animals in fed on food dosed with 1000 or 2000 µg/g nano-TiO2 for 3, 7, 14 or 28 days with different degrees of destabilization of cell membranes, assessed visually and classified from 0 to 6 according to the scale defined in Materials and Methods, above. On x scale also number of animals in each group is represented (n). Digestive gland cell membrane stability values ≤ 2 represent animals which had no destabilized cell membrane and digestive gland cell membrane stability values 3 or 4 animals with destabilized cell membranes. Those with value 5 or 6 had the most destabilized cell membranes. Statistical differences between exposed and control animals (within one exposure duration) are marked with an asterisk (* p < 0.05 and ** p < 0.01).