Title :
Effect of ultrasonic-assisted extraction on antioxidant activity and molecular weight distribution of polysaccharides from Schisandra Chinensis (Turcz.) baill
Author :
Wang, Yanqun ; Xianjun Meng ; Li, Bin ; Sun, Xiyun ; Zhang, Qi
Author_Institution :
Coll. of Food Sci., Shenyang Agric. Univ., Shenyang, China
Abstract :
The molecular weight distribution and antioxidant activity of polysaccharides from Schisandra chinensis (SCP) extracted by hot-water and ultrasonic pretreatment assisted were investigated, including scavenging activities against hydroxyl radical, 1,1-diphenyl-2-picrylhydrazyl (DPPH) and superoxide anion. Obvious differences in molecular weight distribution and antioxidant activity between the hot-water extracts and ultrasonic pretreatment assisted extracts were observed. The SCP with ultrasonic pretreatment was degraded causing an increase of fractions. Both of SCP showed a noticeable scavenging activity against hydroxyl radical and DPPH, and the antioxidant activity of SCP, with ultrasonic pretreatment, was higher. However, superoxide anion scavenging activity of SCP was hardly observed.
Keywords :
bioacoustics; biochemistry; botany; organic compounds; 1,1-diphenyl-2-picrylhydrazyl; Schisandra Chinensis; antioxidant activity; baill; hot water pretreatment; hydroxyl radical; molecular weight distribution; polysaccharides; scavenging activities; ultrasonic assisted extraction; Acoustics; Chemicals; Degradation; Polymers; Temperature measurement; Schisandra chinensis; antioxidant activity; molecular weight; polysaccharide; ultrasonic;
Conference_Titel :
Biomedical Engineering and Informatics (BMEI), 2011 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-9351-7
DOI :
10.1109/BMEI.2011.6098603
