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  • Title: The isolation and antioxidant activity of polysaccharides from the marine microalgae Isochrysis galbana.
    Author: Sun Y, Wang H, Guo G, Pu Y, Yan B.
    Journal: Carbohydr Polym; 2014 Nov 26; 113():22-31. PubMed ID: 25256454.
    Abstract:
    Three polysaccharides, IPSI-A, IPSI-B and IPSII, were successfully isolated from the marine microalgae Isochrysis galbana through a combination of anion-exchange column chromatography and repeated gel chromatography. These three polysaccharides were demonstrated to have moderate scavenging activities against superoxide and hydroxyl radicals and moderate reductive power in a concentration-dependent manner. The IPSII demonstrated more effective antioxidant activities than IPSI-A and IPSI-B. IPSII had a molecular weight of 15.934 kDa belonging to a β-type heteropolysaccharide with a pyran group and primarily contained mannose with variable amounts of glucose, galactose and rhamnose based on an analysis of infrared spectroscopy (IR), electrospray ionization-mass spectrometry (ESI-MS) and (1)H nuclear magnetic resonance ((1)H NMR).
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