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https://hdl.handle.net/1822/22295
Título: | Chemical characterization and antioxidant activity of sulfated polysaccharide from the red seaweed Gracilaria birdiae |
Autor(es): | Souza, B. W. S. Cerqueira, M. A. Bourbon, A. I. Pinheiro, A. C. Martins, Joana Teixeira, J. A. Coimbra, Manuel A. Vicente, A. A. |
Palavras-chave: | Gracilaria Sulfated polysaccharide Antioxidant activity |
Data: | 2012 |
Editora: | Elsevier 1 |
Revista: | Food Hydrocolloids |
Resumo(s): | Hydrocolloids from seaweeds have interesting functional properties, such as antioxidant activity and gelling ability. A polysaccharide was isolated by aqueous extraction at 90 C from the red seaweed Gracilaria birdiae (Gb), with a yield of 27.2% of the seaweed dry weight. The sulfate content of the polysaccharide was 8.4% and the main sugars present were galactose (65.4 mol%), 3,6-anhydrogalactose (25.1 mol%) and 6-O-methylgalactose (9.2 mol%). Gel permeation chromatography showed that Gb polysaccharide is a heterogeneous system, with molar mass at the main peak of 3.7 105 g mol1 and a shoulder of 2.6 106 g mol1. The sulfated polysaccharide of Gb characterized by FTIR exhibits the characteristic bands of agarocolloids (at 1375 and 770 cm1).The rheological behavior of Gb sulfated polysaccharide exhibits a gel-like behavior close to the one observed in commercial agar. The antioxidant properties of Gb sulfated polysaccharide were evaluated by measuring DPPH freeradical scavenging effect, showing that this polysaccharide has a moderate effect in inhibiting the formation of those radicals. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/22295 |
DOI: | 10.1016/j.foodhyd.2011.10.005 |
ISSN: | 0268-005X |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Artigo11.12_JAT.pdf | 425,7 kB | Adobe PDF | Ver/Abrir |