title: Ultrasound-assisted extraction of bioactive compounds from palm pressed fiber with high antioxidant and photoprotective activities.
abstract: 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 120W.cm-2and pulse factor of 0.4, yielding 3.24wt%. Compounds such as fatty acids, β-sitosterol, α-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-ethylbenzothiazoline-6-sulfonic acid) - ABTS) and biological radicals (Hydroxyl - 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.
authors.affiliation: Department of Chemistry, Federal University of Santa Maria, Camobi Campus, Santa Maria, RS 97105-900, Brazil.
authors.forename: Valéria
authors.initials: V
authors.lastname: Dal Prá
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria, RS 97105-900, Brazil.
authors.forename: Felipe C
authors.initials: FC
authors.lastname: Lunelli
authors.affiliation: Department of Food Technology, Federal University of Santa Maria, Camobi Campus, Santa Maria, RS 97105-900, Brazil.
authors.forename: Raquel Guidetti
authors.initials: RG
authors.lastname: Vendruscolo
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria, RS 97105-900, Brazil.
authors.forename: Rafael
authors.initials: R
authors.lastname: Martins
authors.affiliation: Department of Food Technology, Federal University of Santa Maria, Camobi Campus, Santa Maria, RS 97105-900, Brazil.
authors.forename: Roger
authors.initials: R
authors.lastname: Wagner
authors.affiliation: Department of Chemistry, Federal University of Santa Maria, Camobi Campus, Santa Maria, RS 97105-900, Brazil.
authors.forename: Ayres P
authors.initials: AP
authors.lastname: Lazzaretti
authors.affiliation: Institute of Chemistry, Federal University of Rio de Janeiro, Cidade Universitária, Centro de Tecnologia, Bloco A, 7 Andar, Rio de Janeiro 21941-909, RJ, Brazil.
authors.forename: Denise M Guimarães
authors.initials: DMG
authors.lastname: Freire
authors.affiliation: Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece.
authors.forename: Maria
authors.initials: M
authors.lastname: Alexandri
authors.affiliation: Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece.
authors.forename: Apostolis
authors.initials: A
authors.lastname: Koutinas
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Av. Roraima, 1000, Santa Maria, RS 97105-900, Brazil. Electronic address: mazutti@ufsm.br.
authors.forename: Marcio A
authors.initials: MA
authors.lastname: Mazutti
authors.affiliation: Department of Chemistry, Federal University of Santa Maria, Camobi Campus, Santa Maria, RS 97105-900, Brazil. Electronic address: marcelobdarosa@gmail.com.
authors.forename: Marcelo Barcellos
authors.initials: MB
authors.lastname: da Rosa
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D028023:Arecaceae / Q000737:chemistry*; D005591:Chemical Fractionation / Q000379:methods*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D013473:Sunscreening Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D000069453:Ultrasonic Waves
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D013473:Sunscreening Agents
keywords: Natural sunscreen; Synthetic and biological radicals; Ultrasound-assisted extraction