Abstract:The non-enzymic scavenger for superoxide radicals was found in leaves ofsome plants, such as mango (Mangifera indica),guava(Psidium guajava),pine(Pinusmassoniana) and green tea. The equivalent scavenging capacity for one unit of SOD activityin these plants was 0.5mg to 1.0mg of fresh weight or 0.29mg of dry tea. Heat treatment ofthe rude extract could not reduce the scavenging effect. Similar patterns onPAGE-electrophoretogram were identified either by normal NBT-SOD test or phenolicreagent(AgNO3-NH4OH), it indicated that phenolic compounds Aught be one of the maincomponents with non-enzymic scavenging effect on Moreover,some synthesizedphenolics (guaiacol,propyl gallate, p-nitrophenol)and plant digallic acid could asloscavenge the in vino.
