The Experts below are selected from a list of 5640 Experts worldwide ranked by ideXlab platform
Derek R Lovley - One of the best experts on this subject based on the ideXlab platform.
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growth with high planktonic biomass in Shewanella Oneidensis fuel cells
Fems Microbiology Letters, 2008Co-Authors: Martin Lanthier, Kelvin B. Gregory, Derek R LovleyAbstract:Shewanella Oneidensis MR-1 grew for over 50 days in microbial fuel cells, incompletely oxidizing lactate to acetate with high recovery of the electrons derived from this reaction as electricity. Electricity was produced with lactate or hydrogen and current was comparable to that of electricigens which completely oxidize organic substrates. However, unlike fuel cells with previously described electricigens, in which cells are primarily attached to the anode, at least as many of the S. Oneidensis cells were planktonic as were attached to the anode. These results demonstrate that S. Oneidensis may conserve energy for growth with an electrode serving as an electron acceptor and suggest that multiple strategies for electron transfer to fuel cell anodes exist.
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Growth with high planktonic biomass in Shewanella Oneidensis fuel cells
FEMS microbiology letters, 2007Co-Authors: Martin Lanthier, Kelvin B. Gregory, Derek R LovleyAbstract:Shewanella Oneidensis MR-1 grew for over 50 days in microbial fuel cells, incompletely oxidizing lactate to acetate with high recovery of the electrons derived from this reaction as electricity. Electricity was produced with lactate or hydrogen and current was comparable to that of electricigens which completely oxidize organic substrates. However, unlike fuel cells with previously described electricigens, in which cells are primarily attached to the anode, at least as many of the S. Oneidensis cells were planktonic as were attached to the anode. These results demonstrate that S. Oneidensis may conserve energy for growth with an electrode serving as an electron acceptor and suggest that multiple strategies for electron transfer to fuel cell anodes exist.
Benjamin K. Keitz - One of the best experts on this subject based on the ideXlab platform.
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Tuning Extracellular Electron Transfer by Shewanella Oneidensis Using Transcriptional Logic Gates.
ACS synthetic biology, 2020Co-Authors: Christopher M. Dundas, David J. F. Walker, Benjamin K. KeitzAbstract:Extracellular electron transfer (EET) pathways, such as those in the bacterium Shewanella Oneidensis, interface cellular metabolism with a variety of redox-driven applications. However, designer co...
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Extracellular Electron Transfer by Shewanella Oneidensis Controls Palladium Nanoparticle Phenotype
ACS synthetic biology, 2018Co-Authors: Christopher M. Dundas, Austin J. Graham, Dwight K. Romanovicz, Benjamin K. KeitzAbstract:The relative scarcity of well-defined genetic and metabolic linkages to material properties impedes biological production of inorganic materials. The physiology of electroactive bacteria is intimately tied to inorganic transformations, which makes genetically tractable and well-studied electrogens, such as Shewanella Oneidensis, attractive hosts for material synthesis. Notably, this species is capable of reducing a variety of transition-metal ions into functional nanoparticles, but exact mechanisms of nanoparticle biosynthesis remain ill-defined. We report two key factors of extracellular electron transfer by S. Oneidensis, the outer membrane cytochrome, MtrC, and soluble redox shuttles (flavins), that affect Pd nanoparticle formation. Changes in the expression and availability of these electron transfer components drastically modulated particle synthesis rate and phenotype, including their structure and cellular localization. These relationships may serve as the basis for biologically tailoring Pd nanopa...
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Shewanella Oneidensis as a living electrode for controlled radical polymerization
Proceedings of the National Academy of Sciences of the United States of America, 2018Co-Authors: Christopher M. Dundas, Austin J. Graham, Nathaniel A Lynd, Benjamin K. KeitzAbstract:Metabolic engineering has facilitated the production of pharmaceuticals, fuels, and soft materials but is generally limited to optimizing well-defined metabolic pathways. We hypothesized that the reaction space available to metabolic engineering could be expanded by coupling extracellular electron transfer to the performance of an exogenous redox-active metal catalyst. Here we demonstrate that the electroactive bacterium Shewanella Oneidensis can control the activity of a copper catalyst in atom-transfer radical polymerization (ATRP) via extracellular electron transfer. Using S. Oneidensis , we achieved precise control over the molecular weight and polydispersity of a bioorthogonal polymer while similar organisms, such as Escherichia coli , showed no significant activity. We found that catalyst performance was a strong function of bacterial metabolism and specific electron transport proteins, both of which offer potential biological targets for future applications. Overall, our results suggest that manipulating extracellular electron transport pathways may be a general strategy for incorporating organometallic catalysis into the repertoire of metabolically controlled transformations.
Jürgen Vollmer - One of the best experts on this subject based on the ideXlab platform.
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Hybrid sideways/longitudinal swimming in the monoflagellate Shewanella Oneidensis: from aerotactic band to biofilm.
Journal of the Royal Society Interface, 2020Co-Authors: Laura Stricker, Isabella Guido, Thomas Breithaupt, Marco G. Mazza, Jürgen VollmerAbstract:Shewanella Oneidensis MR-1 are facultative aerobic electroactive bacteria with an appealing potential for sustainable energy production and bioremediation. They gather around air sources, forming a...
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hybrid sideways longitudinal swimming in the monoflagellate Shewanella Oneidensis from aerotactic band to biofilm
Journal of the Royal Society Interface, 2020Co-Authors: Laura Stricker, Isabella Guido, Thomas Breithaupt, Marco G. Mazza, Jürgen VollmerAbstract:Shewanella Oneidensis MR-1 are facultative aerobic electroactive bacteria with an appealing potential for sustainable energy production and bioremediation. They gather around air sources, forming a...
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Hybrid sideways/longitudinal swimming in the monoflagellate Shewanella Oneidensis: from aerotactic band to biofilm
2020Co-Authors: Laura Stricker, Isabella Guido, Thomas Breithaupt, Marco Mazza, Jürgen VollmerAbstract:Shewanella Oneidensis MR-1 are facultative aerobic electroactive bacteria with an appealing potential for sustainable energy production and bioremediation. They gather around air sources, forming aerotactic bands and biofilms. Here, we experimentally follow the evolution of the band around an air bubble, and we find good agreement with the numerical solutions of the pertinent transport equations. Video microscopy reveals a transition between motile and non-motile MR-1 upon oxygen depletion, preventing further development of the biofilm. We discover that MR-1 can alternate between longitudinal fast and sideways slow swimming. The resulting bimodal velocity distributions change in response to different oxygen concentrations and gradients, supporting the biological functions of aerotaxis and confinement
Martin Lanthier - One of the best experts on this subject based on the ideXlab platform.
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growth with high planktonic biomass in Shewanella Oneidensis fuel cells
Fems Microbiology Letters, 2008Co-Authors: Martin Lanthier, Kelvin B. Gregory, Derek R LovleyAbstract:Shewanella Oneidensis MR-1 grew for over 50 days in microbial fuel cells, incompletely oxidizing lactate to acetate with high recovery of the electrons derived from this reaction as electricity. Electricity was produced with lactate or hydrogen and current was comparable to that of electricigens which completely oxidize organic substrates. However, unlike fuel cells with previously described electricigens, in which cells are primarily attached to the anode, at least as many of the S. Oneidensis cells were planktonic as were attached to the anode. These results demonstrate that S. Oneidensis may conserve energy for growth with an electrode serving as an electron acceptor and suggest that multiple strategies for electron transfer to fuel cell anodes exist.
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Growth with high planktonic biomass in Shewanella Oneidensis fuel cells
FEMS microbiology letters, 2007Co-Authors: Martin Lanthier, Kelvin B. Gregory, Derek R LovleyAbstract:Shewanella Oneidensis MR-1 grew for over 50 days in microbial fuel cells, incompletely oxidizing lactate to acetate with high recovery of the electrons derived from this reaction as electricity. Electricity was produced with lactate or hydrogen and current was comparable to that of electricigens which completely oxidize organic substrates. However, unlike fuel cells with previously described electricigens, in which cells are primarily attached to the anode, at least as many of the S. Oneidensis cells were planktonic as were attached to the anode. These results demonstrate that S. Oneidensis may conserve energy for growth with an electrode serving as an electron acceptor and suggest that multiple strategies for electron transfer to fuel cell anodes exist.
Kelvin B. Gregory - One of the best experts on this subject based on the ideXlab platform.
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Changes in carbon electrode morphology affect microbial fuel cell performance with Shewanella Oneidensis MR-1
Energies, 2015Co-Authors: David V.p. Sanchez, Daniel Jacobs, Kelvin B. Gregory, Jiyong Huang, Radisav D. Vidic, Minhee YunAbstract:The formation of biofilm-electrodes is crucial for microbial fuel cell current production because optimal performance is often associated with thick biofilms. However, the influence of the electrode structure and morphology on biofilm formation is only beginning to be investigated. This study provides insight on how changing the electrode morphology affects current production of a pure culture of anode-respiring bacteria. Specifically, an analysis of the effects of carbon fiber electrodes with drastically different morphologies on biofilm formation and anode respiration by a pure culture (Shewanella Oneidensis MR-1) were examined. Results showed that carbon nanofiber mats had ~10 fold higher current than plain carbon microfiber paper and that the increase was not due to an increase in electrode surface area, conductivity, or the size of the constituent material. Cyclic voltammograms reveal that electron transfer from the carbon nanofiber mats was biofilm-based suggesting that decreasing the diameter of the constituent carbon material from a few microns to a few hundred nanometers is beneficial for electricity production solely because the electrode surface creates a more relevant mesh for biofilm formation by Shewanella Oneidensis MR-1.
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growth with high planktonic biomass in Shewanella Oneidensis fuel cells
Fems Microbiology Letters, 2008Co-Authors: Martin Lanthier, Kelvin B. Gregory, Derek R LovleyAbstract:Shewanella Oneidensis MR-1 grew for over 50 days in microbial fuel cells, incompletely oxidizing lactate to acetate with high recovery of the electrons derived from this reaction as electricity. Electricity was produced with lactate or hydrogen and current was comparable to that of electricigens which completely oxidize organic substrates. However, unlike fuel cells with previously described electricigens, in which cells are primarily attached to the anode, at least as many of the S. Oneidensis cells were planktonic as were attached to the anode. These results demonstrate that S. Oneidensis may conserve energy for growth with an electrode serving as an electron acceptor and suggest that multiple strategies for electron transfer to fuel cell anodes exist.
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Growth with high planktonic biomass in Shewanella Oneidensis fuel cells
FEMS microbiology letters, 2007Co-Authors: Martin Lanthier, Kelvin B. Gregory, Derek R LovleyAbstract:Shewanella Oneidensis MR-1 grew for over 50 days in microbial fuel cells, incompletely oxidizing lactate to acetate with high recovery of the electrons derived from this reaction as electricity. Electricity was produced with lactate or hydrogen and current was comparable to that of electricigens which completely oxidize organic substrates. However, unlike fuel cells with previously described electricigens, in which cells are primarily attached to the anode, at least as many of the S. Oneidensis cells were planktonic as were attached to the anode. These results demonstrate that S. Oneidensis may conserve energy for growth with an electrode serving as an electron acceptor and suggest that multiple strategies for electron transfer to fuel cell anodes exist.
