Ethylene antimicrobial action

Figure 4 Carajurone (R=CHs) and the related carajuretin (R=H) result by the very rapid enzymatic aerial oxidation of flavans present in the leaves of Arrabidaea chica. The plant is one of the most used Amazonian medicinal plants and the anti-microbial and other activities may be related to the presence of these red pigment. Some indigenous tribes use them as face paints and carajurone has been commercialised in the past as chica red. Genipa americana fruit juice, by the action of an endogenous glucosidase followed by aerial oxidation, provides another pigment. The juice has multiple medicinal uses probably associated with its antimicrobial action. Here the dye is blue-black and is believed to be an ethylene-bis- -aza-azulene , derived by condensation of the genipin monomer with primary amines. ...

The active or intelligent packaging has various modes of action such as removal, Oj barrier, water removal, gas indicator, ethylene removal, CO release, antimicrobial properties, and so on. Recently, new films known as time temperature indicators have also been introduced for commercial application. 

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