For peroxidase assay, two types of antioxidant application were
utilized: (1) extract of crude cabbage with no treatment supplied,
then 0.03 ml of antioxidants solution (essential oils, ascorbic acid
or water) were added to the extract (in vitro samples). (2) Crude
cabbage immersed in antioxidant solution (essential oils, ascorbic
acid or water) and was dried by exposure to room temperature
(in vivo samples) and afterwards prepared for peroxidase measuring
(Ponce et al., 2008).