Ultrasound-assisted extraction of bioactive compounds from palm pressed fiber with high antioxidant and photoprotective activities

作者：Dal Pra Valeria; Lunelli Felipe C; Vendruscolo Raquel Guidetti; Martins Rafael; Wagner Roger; Lazzaretti Ayres P Jr; Guimaraes Freire Denise M; Alexandri Maria; Koutinas Apostolis; Mazutti Marcio A^*; da Rosa Marcelo Barcellos^*

来源：Ultrasonics Sonochemistry, 2017, 36: 362-366.

DOI：10.1016/j.ultsonch.2016.12.021

• Natural sunscreen
• Ultrasound-assisted extraction
• Synthetic and biological radicals

This work is focused on the optimization of the ultrasound-assisted extraction of antioxidant compounds with photoprotective effect from palm pressed fiber. The influence of ultrasound intensity and pulse cycle was investigated by means of a central composite rotational design. The optimized condition was ultrasound intensity of 120 W.cm(-2) and pulse factor of 0.4, yielding 3.24 wt%. Compounds such as fatty acids, beta-sitosterol, alpha-tocopherol, squalene, total phenolics and carotene were identified. The extract presented antioxidant activity towards synthetic (2,2-diphenyl-1-picrylhydrazyl- DPPH, 2,2'-azinobis-(3-ethylben zothiazoline-6-sulfonic acid) - ABTS) and biological radicals (Hydroxyl-center dot OH), besides a sun protection factor of 15.01. Polar extracts from palm pressed fiber are promising candidates for use in cosmetic and pharmaceutical formulation since they present high antioxidant activity towards different radicals, combined with the high sun protection factor.

• 出版日期2017-5