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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(8): 1197-1211
DOI: https://doi.org/10.20546/ijcmas.2017.608.148


Formation of Electrically Conductive Bacterial Nanowires by Desulfuromonas acetoxidans in Microbial Fuel Cell Reactor
A.N.Z. Alshehri*
Department of Biology, University College in Al-Jummum, Umm Al-Qura University, Makkah, 21955, Saudi Arabia
*Corresponding author
Abstract:

In this investigation on Anaerobic Sulfate Respiration Bacteria (ASRB), it is reported that the obligate anaerobic microorganism, Desulfuromonas acetoxidans are capable of producing nano scale bacterial appendages for facilitating extracellular electron transfer. The nanowires were resistive and electrically conductive (1.88 × 10–8 Ω•m and 7.32 S•m–1). They also permitted the ASRB to colonize the surface of the solid or insoluble electron acceptors, thereby making it possible for extracellular electron transfer to take place to the insoluble electrode in the MFC directly and without the need of mediators for electron shuttling. The maximum power density reached was 7.9 Wm-3, and nanowire production was stimulated whilst insoluble electron acceptors were present for cellular respiration to occur. The results suggest D. acetoxidans initiates the production of conductive nanowires in case of limited availability of a soluble electron acceptor (SO42-) for ASRB as an alternative means for facilitating electron transfer to the insoluble electron acceptors.


Keywords: Anaerobic sulfate respiration bacteria, Desulfuromonas acetoxidans, Conductive bacterial nanowires, Insoluble electron acceptor, Microbial fuel cell.
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How to cite this article:

Alshehri, A.N.Z. 2017. Formation of Electrically Conductive Bacterial Nanowires by Desulfuromonas Acetoxidans in Microbial Fuel Cell ReactorInt.J.Curr.Microbiol.App.Sci. 6(8): 1197-1211. doi: https://doi.org/10.20546/ijcmas.2017.608.148