Service de Radbagronomie, D&artement de Biobgle, CEN Cedarache, BP 1, 13 115, Saint- PauMz-Durance, France, and Structure et R6actIvlt6 des Esphs Paramagn6tIqws, Universlte de Rovence, 13397, Marseilb, France (Fieceived: Oecembw 28, 1982) y-Induced radicals in polycrystalline aD-glucose are trapped with a water-ethanol solution of 2-nitroso-2- methylpropane. Five long-lived nitroxide spin-adducts are evidenced by electron spin ...