Identification of Polyphenols from Chilean Brown Seaweeds Extracts by LC-DAD-ESI-MS/MS ...

• Main Authors: Olate-Gallegos, Carla, Barriga, Andrés, Vergara, Cristina, Fredes, Carolina, García, Paula, Giménez, Begoña, Robert, Paz
• Format: Other Non-Article Part of Journal/Newspaper
• Language: unknown
• Published: Taylor & Francis 2019
• Subjects: Biochemistry; Cell Biology; Pharmacology; Environmental Sciences not elsewhere classified; Chemical Sciences not elsewhere classified; Ecology; FOS Biological sciences; Sociology; FOS Sociology; Biological Sciences not elsewhere classified; Cancer; Plant Biology; Bory; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.6084/m9.figshare.7886725.v1; https://tandf.figshare.com/articles/journal_contribution/Identification_of_Polyphenols_from_Chilean_Brown_Seaweeds_Extracts_by_LC-DAD-ESI-MS_MS/7886725/1

Polyphenol profiles were characterized in extracts of three Chilean brown seaweeds, Durvillaea antarctica (Chamisso) Hariot, Lessonia spicata (Suhr) Santelices, and Macrocystis integrifolia (Bory) by liquid chromatography with mass spectrometry detection (LC-MS/MS). Phlorotannins with different degrees of polymerization were identified in D. antarctica (trimers to octamers) and L. spicata (trimers to tetramers). No signals related to phlorotannins compounds were detected in M. integrifolia. L. spicata and M. integrifolia showed a great variety of flavonoid compounds in comparison with D. antarctica , mainly identified as glycoside forms in all the extracts. The antioxidant activity of brown seaweed extracts measured by ferric reducing power (FRAP) and oxygen radical absorbance capacity (ORAC) was significantly higher in D. antarctica , followed by M. integrifolia and L. spicata , in line with the total phenolic (TP) content. However, D. antarctica and M. integrifolia showed similar activity for free radical ...