Origanum majorana Essential Oil Lacks Mutagenic Activity in the Salmonella/Microsome and Micronucleus Assays

Table 4

Replication index of cultures exposed for 3 h to Origanum majorana essential oil.

Substance	Concentration	Replication factor (mean ± S.D.)	Replication index (%)
	—		100
Essential oil	0.0005 μL/mL		102
	0.005 μL/mL		99
	0.05 μL/mL		15
	0.5 μL/mL		0
	5 μL/mL		0

control: DMSO (0.5%).