title: In intro antioxidant activities of different sulfated polysaccharides from chlorophytan seaweeds Ulva fasciata.
abstract: Four different molecular weight sulfated polysaccharides (UFP1, UFP2, UFP3 and UFP4) were extracted and separated from Ulva fasciata by hot water extraction and ultrafiltration. Their chemical and physical characteristics were determined and antioxidant activities were investigated on the basis of superoxide radical assay, hydroxyl radical assay, ABTS radical assay, and reducing power assay. The results showed that four polysaccharides exhibited antioxidant properties, and UFP2 and UFP3, which have lower content of sulfate showed higher antioxidant activities than UFP1 and UFP4, which have higher content of sulfate. Besides, the content of protein, uronic acid and molecular weights of polysaccharides also influence their antioxidant activities. The antioxidant activities of UFP were not a function of a single factor but a combination of several factors.
authors: College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China.
authors: Ping
authors: P
authors: Shao
authors: Meng
authors: M
authors: Chen
authors: Yaping
authors: Y
authors: Pei
authors: Peilong
authors: P
authors: Sun
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D052160:Benzothiazoles / Q000737:chemistry; D017665:Hydroxyl Radical / Q000037:antagonists & inhibitors; D059625:Liquid-Liquid Extraction; D008970:Molecular Weight; D010084:Oxidation-Reduction; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D012624:Seaweed / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013431:Sulfates; D013451:Sulfonic Acids / Q000737:chemistry; D013481:Superoxides / Q000037:antagonists & inhibitors; D044445:Ulva / Q000737:chemistry*; D014574:Uronic Acids / Q000737:chemistry*; D014867:Water
chemical_list: D000975:Antioxidants; D052160:Benzothiazoles; D011134:Polysaccharides; D013431:Sulfates; D013451:Sulfonic Acids; D014574:Uronic Acids; D014867:Water; D013481:Superoxides; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; D017665:Hydroxyl Radical