Data/hora: 13/06/2024 05:05:57

Provedor de dados: 	5	
País: 	France	
Título: 	Chemical characterization and photoprotective activity measurement of extracts from the red macroalga Solieria chordalis	
Autores: 	Bedoux, Gilles; Hardouin, Kevin; Marty, Christel; Taupin, Laure; Vandanjon, Laurent; Bourgougnon, Nathalie.	
Data: 	2014-08	
Ano: 	2014	
Palavras-chave: 	Mycosporine-like amino acid; Palythenic acid; Photoprotective activity; Solieria chordalis.	
Resumo: 	The photoadaptive responses of macroalgal communities to abiotic stresses have been studied, and a number of UV-absorbing molecules have been identified. Among these compounds, photoprotective compounds such as mycosporine-like amino acids and carotenoids have been isolated from various red macroalgal species. However, several substances still need to be characterized. We describe the preparation of photoprotective extracts obtained from Solieria chordalis. Two solvents, 2-octyl dodecanol and octyldodecyl ester of L-pyrrolidone carboxylic acid, were selected based on their cosmetic functions for performing an ultrasound-assisted extraction. The efficiency of extraction was monitored by spectrophotometry and in vitro photoprotective activity measurements. 2-Octyl dodecanol and octyldodecyl ester of L-pyrrolidone carboxylic acid extracts showed maximum absorption wavelengths ranging from 280 to 340 nm and 270 to 350 nm, respectively. The anti UV-B capacity for protecting a synthetic chlorophyll solution was assessed by measuring its pseudo first-order degradation kinetics at room temperature. Under irradiation at 312 nm, chlorophyll introduced in the 2-octyl dodecanol S. chordalis extract showed the slowest degradation kinetics with a half-life t(1/2) of 121.0 min. Several compounds were detected in the seaweed extract by high-performance liquid chromatography. Among them, the mycosporine-like amino acid, palythenic acid, was detected in the algal extract.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00213/32376/30834.pdf

DOI:10.1515/bot-2013-0118

http://archimer.ifremer.fr/doc/00213/32376/	
Editor: 	Walter De Gruyter Gmbh	
Formato: 	application/pdf	
Fonte: 	Botanica Marina (0006-8055) (Walter De Gruyter Gmbh), 2014-08 , Vol. 57 , N. 4 , P. 291-301	
Fonte: 	2014 by Walter de Gruyter GmbH

info:eu-repo/semantics/openAccess

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