Evidence for involvement of an electron shuttle in electricity generation by Geothrix fermentans

Article Abstract:

A report of complete oxidation of organic compounds linked to electrode reduction by an isolate outside of the Proteobacteria is presented. The finding that Geothrix fermentans can oxidize acetate and other substrates with an electrode serving as the role electron acceptor suggests that the enrichment of organisms closely related to G. fermentans on energy-harvesting electrodes in freshwater sediment might be due to these organisms gaining an energetic advantage by growth on or near the electrode.

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Resistance of solid-phase U(VI) to microbial reduction during in situ bioremediation of uranium-contaminated groundwater

Article Abstract:

A study is conducted to demonstrate the specification of solid-phase uranium in uranium-contaminated subsurface sediments undergoing uranium bioremediation. The findings indicate that although microbial reduction of soluble U(VI) readily immobilized uranium as U(IV), a substantial portion of the U(VI) in the aquifer is strongly associated with the sediments and not microbially reducible.

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Lack of electricity production by pelobacter carbinolicus indicates that the capacity for Fe(III) oxide reduction does not necessarily confer electron transfer ability to fuel cell anodes

Article Abstract:

The stability of Pelobacter carbinolicus to oxidize electron donors with electron transfer to the anodes of dis evaluated. Study reveals that half of the cells growing on the anode surface are P. carbinolicus but there is nearly equal number of planktonic cells of P. carbinolicus.

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