Freshly harvested mushrooms were fumigated with 0, 10,
20 and 30 lLL1
NO at 20 C for 2 h and then taken to examine the antioxidant activities using assays of
reducing power, chelating effect on ferrous ions, scavenging effect on hydroxyl free radicals, and 2,2-
diphenyl-1-picrylhydrazyl radical scavenging activity.