resumo
A detailed study of the lipophilic composition of Codium tomentosum, Ulva lactuca, Gracilaria vermiculophylla and Chondrus crispus macroalgae cultivated in the Portuguese coast was carried out by gas chromatography-mass spectrometry before and after alkaline hydrolysis. Their long-chain aliphatic alcohols and monoglycerides compositions are reported for the first time. Additionally, other new compounds were also identified: phytol and neophytadiene in C. tomentosum, U. lactuca and G. vermiculophylla and stigmasterol, alpha-tocopherol and 24-methylenecholesterol in C tomentosum. The lipophilic fraction of the studied macroalgae are mainly constituted by fatty acids (110.1-1030.5 mg kg(-1) of dry material) and sterols (14.8-1309.1 mg kg(-1) of dry material). C. tomentosum showed to be a valuable source of stigmasterol (1229.0 mg kg(-1) of dry material) and alpha-tocopherol (21.8 mg kg(-1) of dry material). These results are a relevant contribution for the valorisation of these macroalgae species as sources of valuable phytochemicals. (C) 2015 Elsevier Ltd. All rights reserved.
palavras-chave
FATTY-ACID; NATURAL-PRODUCTS; FUNCTIONAL FOOD; ULVA-LACTUCA; VITAMIN-E; SEAWEEDS; PHYTOSTEROLS; TOCOPHEROL; PROFILES; EXTRACTS
categoria
Chemistry; Food Science & Technology; Nutrition & Dietetics
autores
Santos, SAO; Vilela, C; Freire, CSR; Abreu, MH; Rocha, SM; Silvestre, AJD
nossos autores
Armando Jorge Domingues Silvestre
Professor Catedrático
Carla Vilela
Professor Auxiliar
Carmen Sofia da Rocha Freire Barros
Investigador Coordenador
Sónia Andreia Oliveira Santos
Investigador Auxiliaragradecimentos
The authors wish to thank to FCT-Portugal (Fundacao para a Ciencia e Tecnologia) and POPH/FSE for the postdoctoral grants to S.A.O. Santos (SFRH/BPD/84226/2012) and C. Vilela (SFRH/BPD/84168/2012); for C. Freire Research Contract under the program