FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (9): 107-111.

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Study on Bacteriostasic Activity and Scavenging DPPH· Capability of Pigment from Purple Potato

 WANG  Jin-Hua, ZENG  Hai-Ying, QIN  Li-Kang, ZHOU  Bi-Jun   

  1. 1.College of Life Science,Guizhou University,Guiyang 550025,China;2.College of Animal Science,Guizhou University,Guiyang 550025,China
  • Online:2007-09-15 Published:2011-11-22

Abstract: The bacteriostasic activity and scavenging DPPH· capability of the pigment from purple potato was studied.The results showed that the pigment have activity against Bacillus subtilis,Staphylococcus aureus,Salmonelle Dublin and Escherichia coli.The minimum inhibiting contents are 41.75,25.05,25.05 mg/L and 300.58 mg/L,respectively.And the pigment have better scavenging effect on DPPH·.The amount of pigment from purple potato necessary to decrease initial [DPPH·] by 50%(EC50)was 20.842 mg/L.

Key words: pigment from purple potato; bacteriostasic; DPPH·,