Effect of light on the biosynthesis of 'BETA'-carotene and superoxide dismutase activity in the photosynthetic alga gonyaulax polyedra - Hollnagel, H C; Di Mascio, Paolo; Asano, C S; Okamoto, Oswaldo Keith; Stringher, C G; Oliveira, Mariana C; Colepicolo, Pio (Brazilian Journal of Medical and Biological Research, 1996)