BPS Bildungsportal Sachsen GmbH Campus M21 Communardo Software GmbH Dresden International University eScience – Forschungsnetzwerk Sachsen Gesellschaft der Freunde und Förderer der TU Dresden e.V. Gesellschaft für Informatik e.V. (GI) Gesellschaft für Medien in der Wissenschaft e.V. itsax – pludoni GmbH Learnical GbR Medienzentrum, TU Dresden ObjectFab GmbH Transinsight GmbH T-Systems Multimedi...

BPS Bildungsportal Sachsen GmbH Campus M21 Communardo Software GmbH Dresden International University eScience – Forschungsnetzwerk Sachsen Gesellschaft der Freunde und Förderer der TU Dresden e.V. Gesellschaft für Informatik e.V. (GI) Gesellschaft für Medien in der Wissenschaft e.V. itsax – pludoni GmbH Learnical GbR Medienzentrum, TU Dresden ObjectFab GmbH Transinsight GmbH T-Systems Multimedi...

Biochar, a charcoal-like product of the incomplete combustion of organic materials, is an increasingly popular soil amendment designed to improve soil fertility. We investigated the possibility that biochar could promote direct interspecies electron transfer (DIET) in a manner similar to that previously reported for granular activated carbon (GAC). Although the biochars investigated were 1000 t...

We examined the ability of the metal-reducing bacteria Geobacter metallireducens GS-15 and Shewanella oneidensis MR-1 to reduce Pu(VI) and Pu(V). Cell suspensions of both bacteria reduced oxidized Pu [a mixture of Pu(VI) and Pu(V)] to Pu(IV). The rate of plutonium reduction was similar to the rate of U(VI) reduction obtained under similar conditions for each bacteria. The rates of Pu(VI) and U(...

Dehalococcoides mccartyi strains are obligate organohalide-respiring bacteria harboring multiple distinct reductive dehalogenase (RDase) genes within their genomes. A major challenge is to identify substrates for the enzymes encoded by these RDase genes. We demonstrate an approach that involves blue native polyacrylamide gel electrophoresis (BN-PAGE) followed by enzyme activity assays with gel ...

Electrogenic microorganisms possess unique redox biological features, being capable of transferring electrons to the cell exterior and converting highly toxic compounds into nonhazardous forms. These have led development Microbial Electrochemical Technologies (METs), which include applications in fields bioremediation bioenergy production. The optimization these technologies involves efforts fr...

Geobacter species often play an important role in bioremediation of environments contaminated with metals or organics and show promise for harvesting electricity from waste organic matter in microbial fuel cells. The ability of Geobacter species to fix atmospheric nitrogen is an important metabolic feature for these applications. We identified novel regulatory cascades controlling nitrogen-fixa...

Members of the genus Geobacter are the dominant metal-reducing microorganisms in a variety of anaerobic subsurface environments and have been shown to be involved in the bioremediation of both organic and metal contaminants. To facilitate the study of the physiology of these organisms, a genetic system was developed for Geobacter sulfurreducens. The antibiotic sensitivity of this organism was c...

The in situ stimulation of Fe(III) oxide reduction in the subsurface stimulates the growth of Geobacter spp. and the precipitation of U(VI) from groundwater. As with Fe(III) oxide reduction, the reduction of uranium by Geobacter spp. requires the expression of their conductive pili. The pili bind the soluble uranium and catalyse its extracellular reductive precipitation along the pili filaments...

BACKGROUND Production or consumption of protons in growth medium during microbial metabolism plays an important role in determining the pH of the environment. Such pH changes resulting from microbial metabolism may influence the geochemical speciation of many elements in subsurface environments. Protons produced or consumed during microbial growth were measured by determining the amount of acid...