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Chemistry and Industry of Forest Products ›› 2019, Vol. 39 ›› Issue (5): 95-100.doi: 10.3969/j.issn.0253-2417.2019.05.013

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Extraction and Antimicrobial Activity of Juglone from Pericarpium Juglandis

LI Wenjun1, WANG Chengzhang1, LIU Chengjing2   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    2. College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Received:2019-02-18 Online:2019-10-25 Published:2019-11-01

Abstract: Juglone was extracted from pericarpium juglandis by ultrasound-assisted method. The optimal conditions of extracting juglone were obtained by single experiment and orthogonal test as follows:soaking time was 6 h using methanol as solvent, ratio of liquid to material was 5:1(mL:g), ultrasonic time was 35 min, and the yield of juglone was 0.246% and the yield of extract was 13.88%. The antibacterial activities of extract on Bacillus subtilis, Streptococcus pneumoniae, Staphylococcus aureus and S. epidermidis of juglone was investigated by mass concentration of 0.002 5-0.20 g/L, compared with commercial YZN-Y500 nano-silver. The results showed that the optimum extraction conditions was as follows:The antibacterial effect of pericarpium juglandis extract on the mass concentrations of 0.20 g/L and 0.02 g/L was stronger than that of commercial silver nanoparticles.

Key words: pericarpium juglandis, nutcrone, ultrasound assisted, nano-silver solution, antibacterial activity

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