Results 31 to 40 of about 6,826 (194)

Mechanisms of Bacterial Extracellular Electron Exchange. [PDF]

, 2016
The biochemical mechanisms by which microbes interact with extracellular soluble metal ions and insoluble redox-active minerals have been the focus of intense research over the last three decades. The process presents two challenges to the microorganism;
Butt, Julea N., Clarke, Thomas A., Edwards, Marcus J., Gomez-Perez, Laura, Richardson, David J., White, Gaye F.   +5 more
core   +1 more source

Geabacter species enhances pit depth on 304L stainless steel in a medium lacking with electron donor [PDF]

, 2009
Geobacter sulfurreducens bacteria increased the open circuit potential of 304L stainless steel by around 320 mV in only a few hours after inoculation. This represents a significant increase in the corrosion risk.
Basséguy, Régine, Bergel, Alain, Délia, Marie-Line, Gubner, Rolf, Mehanna, Maha, Sathirachinda, Namurata   +5 more
core   +3 more sources

Enhanced Uranium Immobilization and Reduction by Geobacter sulfurreducens Biofilms [PDF]

Applied and Environmental Microbiology, 2014
ABSTRACT Biofilms formed by dissimilatory metal reducers are of interest to develop permeable biobarriers for the immobilization of soluble contaminants such as uranium. Here we show that biofilms of the model uranium-reducing bacterium Geobacter sulfurreducens immobilized substantially more U(VI) than ...
Dena L, Cologgi, Allison M, Speers, Blair A, Bullard, Shelly D, Kelly, Gemma, Reguera   +4 more
openaire   +2 more sources

Genetic identification of a PilT motor in Geobacter sulfurreducens reveals a role for pilus retraction in extracellular electron transfer

Frontiers in Microbiology, 2016
The metal-reducing bacterium Geobacter sulfurreducens requires the expression of conductive pili to reduce iron oxides and to wire electroactive biofilms, but the role of pilus retraction in these functions has remained elusive.
Allison Speers, Bryan D Schindler, Bryan D Schindler, Jihwan Hwang, Jihwan Hwang, Aycin Genc, Aycin Genc, Gemma Reguera   +7 more
doaj   +1 more source

Comparative genomic analysis of Geobacter sulfurreducens KN400, a strain with enhanced capacity for extracellular electron transfer and electricity production [PDF]

, 2012
Peer ...
Aklujkar, Muktak, Butler, Jessica E, Lovley, Derek R, Young, Nelson D   +3 more
core   +4 more sources

Microbial electrocatalysis with Geobacter sulfurreducens biofilm on stainless steel cathodes [PDF]

, 2008
Stainless steel and graphite electrodes were individually addressed and polarized at−0.60V vs. Ag/AgCl in reactors filled with a growth medium that contained 25mM fumarate as the electron acceptor and no electron donor, in order to force the microbial ...
Afkar, Alain Bergel, Bergel, Bond, Claire Dumas, Gorby, Gregory, Gregory, He, Logan, Lopez-Lopez, Lovley, Lovley, Lovley, Methé, Myers, Park, Park, Reguera, Rhoads, Régine Basseguy, Seeliger   +21 more
core   +8 more sources

Aromatic Amino Acids Required for Pili Conductivity and Long-Range Extracellular Electron Transport in Geobacter sulfurreducens

mBio, 2013
It has been proposed that Geobacter sulfurreducens requires conductive pili for long-range electron transport to Fe(III) oxides and for high-density current production in microbial fuel cells. In order to investigate this further, we constructed a strain
Madeline Vargas, Nikhil S. Malvankar, Pier-Luc Tremblay, Ching Leang, Jessica A. Smith, Pranav Patel, Oona Synoeyenbos-West, Kelly P. Nevin, Derek R. Lovley   +8 more
doaj   +1 more source

Role of direct microbial electron transfer in corrosion of steels [PDF]

, 2009
It has recently been discovered that many microbial species have the capacity to connect their metabolism to solid electrodes, directly exchanging electrons with them through membrane-bound redox compounds,nevertheless such a direct electron transfer ...
Basséguy, Régine, Bergel, Alain, Délia, Marie-Line, Mehanna, Maha   +3 more
core   +4 more sources

Effect of surface roughness, biofilm coverage and biofilm structure on the electrochemical efficiency of microbial cathodes [PDF]

, 2011
Biofilms of Geobacter sulfurreducens were formed under chronoamperometry at −0.5 V and −0.6 V vs. Ag/AgCl on stainless steel cathodes and tested for fumarate reduction.
Bergel, Alain, Délia, Marie-Line, Pons, Liz   +2 more
core   +2 more sources

Effect of the semi-conductive properties of the passive layer on the current provided by stainless steel microbial cathodes [PDF]

, 2011
Geobacter sulfur reducens biofilms were formed under constant polarisation at −0.6 V vs. Ag/AgCl on stainless steel cathodes to catalyse the reduction of fumarate.
Basséguy, Régine, Bergel, Alain, Délia, Marie-Line, Pons, Liz   +3 more
core   +2 more sources