Electron beam irradiation preserves nutritional and chemical composition of Agaricus bisporus Portobello. Rossana V. C. Cardoso, Ângela Fernandes, João C.M. Barreira, Amilcar L. Antonio, Pedro M. P. Santos, Sandra Cabo Verde, Ana M. González-Paramás, Lillian Barros, Isabel C.F.R. Ferreira.