CAJ | 학술논문

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3d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.
채용순배복안화계시전류등전화학수단연구료추자세균( Magnetospirillum magneticum AMB-1)적전화학활성.통과대비불동배양조건하적순배복안곡선가지，배양3d시적균체구유교강적전화학활성，기양화봉출현재0.1 V처，환원봉출현재-0.2 V처；용해양능구개변양화봉적봉전위(0 V)，병형성신적환원봉(-0.3 V)；자소체적생성칙엄중억제추자세균적포외전자전체과정.실험결과표명，자소체적형성여추자세균적포외전자전체유관.
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 forma-tion 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 under-stand the mechanisms of biomineralization.