高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (9): 1730-1736.doi: 10.7503/cjcu20150240

• 物理化学 • 上一篇    下一篇

趋磁细菌的电化学活性研究

吴冉冉1, 田晓春1,2, 吴慎剑3, 刘源岗3, 姜艳霞2, 赵峰1()   

  1. 1. 中国科学院城市污染物转化重点实验室, 中国科学院城市环境研究所, 厦门 361021
    2. 厦门大学化学化工学院, 厦门 361005
    3. 华侨大学化工学院, 厦门 361021
  • 收稿日期:2015-03-26 出版日期:2015-09-10 发布日期:2015-08-21
  • 作者简介:联系人简介: 赵 峰, 男, 博士, 研究员, 主要从事生物电化学系统研究. E-mail:fzhao@iue.ac.cn
  • 基金资助:
    国家自然科学基金(批准号: 21177122, 41471260)资助

Research on the Electrochemical Activity of Magnetospirillum Magneticum AMB-1

WU Ranran1, TIAN Xiaochun1,2, WU Shenjian3, LIU Yuangang3, JIANG Yanxia2, ZHAO Feng1,*()   

  1. 1. Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment,Chinese Academy of Sciences, Xiamen 361021, China
    2. College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China
    3. College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
  • Received:2015-03-26 Online:2015-09-10 Published:2015-08-21
  • Contact: ZHAO Feng E-mail:fzhao@iue.ac.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21177122, 41471260)

摘要:

采用循环伏安和计时电流等电化学手段研究了趋磁细菌(Magnetospirillum magneticum AMB-1)的电化学活性. 通过对比不同培养条件下的循环伏安曲线可知, 培养3 d时的菌体具有较强的电化学活性, 其氧化峰出现在0.1 V处, 还原峰出现在-0.2 V处; 溶解氧能够改变氧化峰的峰电位(0 V), 并形成新的还原峰(-0.3 V); 磁小体的生成则严重抑制趋磁细菌的胞外电子传递过程. 实验结果表明, 磁小体的形成与趋磁细菌的胞外电子传递有关.

关键词: 趋磁细菌, 磁小体, 生物矿化, 电化学活性, 循环伏安法

Abstract:

The electrochemical activity of Magnetospirillum magneticum AMB-1 was investigated using cyclic voltammetry and chronoamperometry. Compared with the cyclic voltammograms in different culture conditions, AMB-1 exhibited a good extracellular electron transfer capability after being cultured for 3 d. The oxidation peak was observed at 0.1 V and reduction peak at -0.2 V. The increase of dissolved oxygen would cause a negative shift in oxidation peak(0 V) and a new reduction peak(-0.3 V) appeared. In addition, the formation of magnetosomes deadly inhibited the extracellular electron transfer of AMB-1. The results indicate that the formation of magnetosomes is concerned with extracellular electron transfer. The study is helpful to understand the mechanisms of biomineralization.

Key words: Magnetospirillum magneticum AMB-1, Magnetosome, Biomineralization, Electrochemical activity, Cyclic voltammetry

中图分类号: