Potential Antioxidant Capacity of Sulfated Polysaccharides from the

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J. Agric. Food Chem. 2002, 50, 840−845

Potential Antioxidant Capacity of Sulfated Polysaccharides from the Edible Marine Brown Seaweed Fucus vesiculosus PILAR RUPEÄ REZ,*,† OUSSAMA AHRAZEM,‡

AND

J. ANTONIO LEAL‡

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Departamento de Metabolismo y Nutricio´n, Instituto del Frı´o, Consejo Superior de Investigaciones Cientı´ficas (CSIC), Ciudad Universitaria s/n, E 28040 Madrid, Spain, and Departamento de Microbiologı´a Molecular, Centro de Investigaciones Biolo´gicas (CSIC), Vela´zquez 144, E 28006 Madrid, Spain

Fucus vesiculosus was sequentially extracted with water at 22 °C (fraction 1 (F1)) and 60 °C (F2), and with 0.1 M HCl (F3) and 2 M KOH (F4) at 37 °C. Soluble fractions (42.3% yield) were composed of neutral sugars (18.9-48 g/100 g), uronic acids (8.8-52.8 g/100 g), sulfate (2.4-11.5 g/100 g), small amounts of protein (