1. Radiation Chemistry Department, National Center for Radiation Research and Technology, P.O.Box 29 Nasr City, Cairo, Egypt
2. Canadian Irradiation Centre, Research Laboratories in Sciences Applied to Food, INRS-Institut Armand-Frappier, 531 Blvd. des Prairies, Laval, Québec, Canada, H7 V 1B7
3. International Atomic Energy Agency, Vienna International Centre, POB 100, A-1400 Vienna, Austria