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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