Free radical scavenging and antioxidant activities of EPS2, an exopolysaccharide produced by a marine filamentous fungus Keissleriella sp. YS 4108

Purification, partial characterization and antioxidant activity of polysaccharides from Glycyrrhiza uralensis

“…The superoxide radical scavenging activity of GUPs was evaluated according to the method detailed by Sun et al [14]. Briefly, superoxide radicals were generated in 3.0 mL of 16 mM Tris-HCl buffer (pH 8.0), containing 78 M reduced nicotinamide adenine dinucleotide (NADH), 50 M nitroblue tetrazolium (NBT), 10 M phenazin methosulfate (PMS), and samples at given concentrations of 25, 50, 100, 200 and 400 g/mL.…”

Production, characterization and antioxidant activities in vitro of exopolysaccharides from endophytic bacterium Paenibacillus polymyxa EJS-3

“…Therefore, it is essential to develop natural nontoxic antioxidants to protect human body from free radicals and retard the progress of many chronic diseases. In the search of new natural antioxidants, a number of polysaccharides obtained from plants, animals and microorganisms have been demonstrated to possess potent antioxidant activities and potential applications as natural antioxidants (Luo & Fang, 2008;Sun, Wang, Fang, Gao, & Tan, 2004;Yu et al, 2007).…”

Antioxidant activity of some edible plants of the Turkmen Sahra region in northern Iran

“…There is increasing evidence indicating that reactive oxygen species (ROS) and free radical mediated reactions are involved in degenerative or pathological events such as aging, cancer, coronary heart ailments, and Alzheimer's disease (Sun, Wang, Fang, Gao, & Tan, 2004). Reactive oxygen species, including; superoxide anion, hydroxyl radical, and hydrogen peroxide, are generated in specific organelles of the cell under normal physiological conditions (Haraguchi, 2001).…”