UVA I-protection effectiveness of bioactive compound and organic UV filters: an in vitro assessment
AUTOR(ES)
Baby, André Rolim, Balogh, Tatiana Santana, Pedriali, Carla Aparecida, Kaneko, Telma Mary, Velasco, Maria Valéria Robles
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2009
RESUMO
This research work aimed at determining the UVA effectiveness (UVA I/UV ratio), by diffuse transmittance analysis, of sunscreens developed with a bioactive substance, the rutin, associating or not with organic UVB-UVA filters incorporated at a phosphate-base O/W emulsion. Sunscreens provided conflicting and unpredictable results concerning the anti-UVA protection, specially, at the UVA I region. Possible interactions among the organic UV filters and the polyphenolic bioactive substance may have accounted with improvement or reduction of UV protection by a complex and not yet elucidated mechanism, probably regarding wavelength delocalization to superior or inferior values, by resonant molecule stabilization or destabilization.
