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대한화학회 제124회 학술발표회 및 총회 Photoelectrochemical Coulometric Sensing of Anabaena variabilis Through a Mediated Electron Transfer System

등록일
2019년 8월 22일 15시 31분 53초
접수번호
1275
발표코드
ELEC.P-426 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Electrochemistry
저자 및
공동저자
Hyejun Cho, Jinhwan Lee, Sunghyun Kim1,*
Department of Biotechnology, Konkuk University, Korea
1Biotechnology, Konkuk University, Korea
It is a worthwhile issue to predict the population of cyanobacteria to prevent algal bloom. Unlike existing methods for detecting cell population such as direct cell enumeration or fluorescence measurement, we developed a simple and fast coulometric system to detect the reduced redox mediator from electrons generated by photosynthesis of cyanobacteria. 2,6-dimethyl-1,4-benzoquinone (DMBQ) is a suitable redox mediator in this system in that it can diffuse in and out of the cell membrane to reach to the thylakoid membrane and has a proper formal potential to harvest electrons, which can pass through electron transport pathway embedded in the thylakoid membrane. The red light, wavelength of 660 nm, was used to prevent a reduction of DMBQ itself by light without cyanobacteria. To identify the electron flows from a low concentration of cyanobacteria, glassy carbon rod, which is a highly sensitive material was applied. The detecting limitation point of 2.45 mg L-1, which is corresponding to 3.5 × 108 cells mL-1 was identified from this system, and this has never been reported. The results show a simple and fast detectable coulometric cyanobacterial sensor that can identify the generated electrons from photosynthesis electrochemically. Also, it shows the possibility of a real-time monitoring amperometric sensor through the further improvement of the system.

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