ESR detection procedure of irradiated papaya containing high water content

Kikuchi, Masahiro; Shimoyama, Yuhei; Ukai, Mitsuko*; Kobayashi, Yasuhiko

ESR signals were recorded from irradiated papaya at liquid nitrogen temperature (77 K), and freeze-dried irradiated papaya at room temperature (295 K). Two side peaks from the flesh at the liquid nitrogen temperature indicated a linear dose response for 3-14 days after the -irradiation. The line shapes recorded from the freeze-dry specimens were sharper than those at liquid nitrogen temperature.