Journal of Guangxi Normal University(Natural Science Edition) ›› 2018, Vol. 36 ›› Issue (2): 105-110.doi: 10.16088/j.issn.1001-6600.2018.02.015

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Extraction and Free Radical Scavenging Activity of Polysaccharide and Polyphenol from the Ginkgo biloba L. Shell

YANG Zhengmin1,2,3, ZHANG Yanjun1,2, WANG Shengyun3, HU Xianyun3, Li Jun1,2*   

  1. 1. School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin Guangxi 541004, China;
    2. State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin Guangxi 541004, China;
    3. Qiannan Medical College for Nationalities, Duyun Guizhou 558001, China
  • Received:2017-09-11 Online:2018-05-10 Published:2018-07-18

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Abstract: After de-fatted by petroleum ether, the residue of drying powder of ginkgo biloba L. shell was extracted using distilled water as the solvent. The extracting parameters, including solid-liquid ratio, extraction temperature and extraction time, were investigated with the designed single factor and orthogonal test method. The optimized extraction conditions were determined to be a solid to liquid ratio of 1∶25 with the extraction temperature at 80 ℃ and an extracting duration of 1 h. The polysaccharide extraction rate under these conditions reaches 89.74%. Moreover, the scavenging capacities of polysaccharide and polyphenol from the ginkgo shell on DPPH, ·OH, O-2· and ABTS+· were assayed. The results showed that the polysaccharide has scavenging effect on DPPH, O-2·and ABTS+·. The polyphenol has very strong scavenging effect on O-2·, DPPH and ABTS+·, with IC50 values of 0.35, 0.10 and 0.78 g/L, respectively. It revealed that the polyphenol from the ginkgo shell is a promising natural antioxidants.

Key words: Ginkgo biloba L. shell, polysaccharide, polyphenol, extraction, free radical scavenging

CLC Number: 

  • U491
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