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Radical intermediates involved in the bleaching of the carotenoid crocin. Hydroxyl radicals, superoxide anions and hydrated electrons.
Int. J. Radiat. Biol. 41, 493-501 (1982)
The participation of the primary radicals in the bleaching of aqueous solutions of the carotenoid crocin by ionizing radiation was investigated, employing both X-radiolysis and pulse radiolysis. The pulse-radiolytic data demonstrated a very rapid diffusion-controlled attack by both hydroxyl radicals (·OH) and hydrated electrons (e- aq), while superoxide anions (O- 2) did not react at all. The site of the initial reaction of these radicals was not limited to the polyene chromophore. Slower secondary reactions involving crocin alkyl or peroxy radicals contribute mainly to the overall bleaching, in particular during steady-state irradiation.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
ISSN (print) / ISBN
0955-3002
e-ISSN
1362-3095
Zeitschrift
International Journal of Radiation Biology
Quellenangaben
Band: 41,
Heft: 5,
Seiten: 493-501
Verlag
Informa Healthcare
Begutachtungsstatus
Peer reviewed
Institut(e)
Abteilung für Strahlenbiologie und Biophysik