In intro antioxidant activities of different sulfated polysaccharides from chlorophytan seaweeds Ulva fasciata

Navicula sp. Sulfated Polysaccharide Gels Induced by Fe(III): Rheology and Microstructure

“…The spectrum of this polysaccharide showed the typical infrared footprint of carbohydrates. The band in the region of 3405 cm −1 corresponds to the stretching vibration characteristic of OH groups; a similar band around this wavenumber was observed for sulfated polysaccharides from green and brown seaweeds [19,20]. The band related to amides associated with the protein was detected at 1656 cm −1 ; this band has also been detected in other microalgae [18].…”

“…The band corresponding to the S=O vibration (1244 cm −1 ) possesses a low intensity; this result could be due to the low sulfate content detected on the sample (0.33% w / w ) as reported in Table 1. Some studies have reported the presence of this band in sulfated polysaccharides extracted from the diatom Navicula directa [3] and from the three major groups of seaweeds (green, brown and red algae) [19,20,21,23]. Finally, the band at 821 cm −1 was attributed to C–O–S stretching vibrations; sulfated polysaccharides extracted from some green and brown seaweed species also showed a band specific to the C–O–S group [19,20,21,23,24] around a similar wavelength as in our study.…”

Structural characterization and bioactivities of sulfated polysaccharide from Monostroma oxyspermum

“…It showed outstanding ABTS scavenging ability, with increased concentration, whereas the standards BHT and l-ascorbic acid showed 79.39% and 83.88% of scavenging ability at the highest concentration of 125 g/ml respectively. The result of the present study sulfated polysaccharide reported higher ABTS scavenging ability with lowest concentration, when compared the four sulfated polysaccharide fractions (UFP1, UFP2, UFP3 and UFP4) from Ulva fasciata reported 47.38%, 99.62%, 99.07% and 77.07% at 10 mg/ml concentration [39]. …”

“…Whereas the standards BHT and l-ascorbic acid accounted 18.6% and 17.56% of reducing power at the highest concentration of 400 g/ml respectively. The present study sulfated polysaccharide recorded higher reducing power capacity than that of the sulfated polysaccharide fraction (UFP2 and UFP3) from U. fasciata which reported 1.048 and 0.612 at 10 mg/ml [39]. The reducing power was generally associated with the presence of reductones, which had been shown to exert antioxidant action by breaking the free radical chain by donating a hydrogen atom.…”

Overview on Biological Activities and Molecular Characteristics of Sulfated Polysaccharides from Marine Green Algae in Recent Years

“…For example, ulvans isolated from U. fasciata with various sulfated degree were used to test the antioxidant activities of the algae using an in vitro method; results showed that SPs with lower sulfate demonstrate higher activities [58] . The positive effect of sulfated degree on the antioxidant activities of SPs from E. linza has also been reported in other papers.…”