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Table 13 Semiquantitative score of cytotoxic response for BS EN ISO 10993-5 Cytotoxicity Test

From: Initial in vitro screening approach to investigate the potential health and environmental hazards of Envirox™ – a nanoparticulate cerium oxide diesel fuel additive

Grade Cytotoxicity/Reactivity Description of Cytotoxicity/Reactivity Zone
0 None No detectable zone around or under specimen
1 Slight Some malformed or degenerated cells
2 Mild Zone limited to area under specimen
3 Moderate Zone extends 0.5 to 1.0 cm beyond specimen
4 Severe Zone extends greater than 1.0 cm beyond specimen but does not involve entire dish