Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 63, Issue 12, Pages 3177-3188Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf504220e
Keywords
Sargassum muticum; Osmundea pinnatifida; Codium tomentosum; water-based extraction; biological properties
Funding
- Portuguese Science Foundation (FCT - Fundacao para a Ciencia e Tecnologia) [SFRH/BPD/73781/2010 ., SFRH/BD/77647/2011]
- European Social Fund
- Portuguese National Funds from MCTES [PEst-C/MAR/LA0017/2013, PEst-OE/EQB/LA0016/2013]
- European Funds through COMPETE
- National Funds through the FCT
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Seaweeds are an excellent source of bioactive compounds, and therefore the use of sustainable and food compatible extraction methods such as enzyme-assisted (EAE) and ultrasound-assisted extraction were applied on Sargassum muticum, Osmundea pinnatifida, and Codium tomentosum. Extracts were evaluated for proximate characterization and biological properties. Higher extraction yields were observed for C. tomentosum EAE (48-62%; p < 0.05 for Cellulase and Viscozyme), followed by O. pinnatifida (49-55%; p < 0.05 except Alcalase) and S. muticum (26-31%; p < 0.05). S. muticum extracts presented the highest nitrogen (25 +/- 2 mg/g(lyoph) (extract)) and total phenolics (261 +/- 37 mu g(catechol) (equiv)/gl(yoph) (extract)) contents, whereas higher sugars (78 +/- 14 mg(glucose) (equiv)/g(lyoph) (extract)) including sulfated polysaccharide (44 +/- 8 mg(Na2SO4) (acid)/g(lyoph) (extract)) contents characterized O. pinnatifida extracts. A higher effect on hydroxyl-radical scavenging activity (35-50%) was observed for all extracts, whereas S. muticum Alcalase and C. tomentosum Cellulase extracts exhibited higher prebiotic activity than fructooligosaccharides. O. pinnatifida and C. tomentosum EAE showed inhibitory potential against alpha-glucosidase (38-49%).
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