Garden compost inoculum leads to microbial bioanodes with potential-independent characteristics.

Garden compost leachate was used to form microbial bioanodes under polarization at -0.4, -0.2 and +0.

Effect of variation of environmental conditions on the microbial communities of deep-sea vent chimneys, cultured in a bioreactor.

Both cultivation and molecular techniques were used to investigate the microbial diversity and dynamic of a deep-sea vent chimney. The enrichment cultures performed in a gas-lift bioreactor were inoculated with a black smoker chimney sample collected on TAG site on the mid-Atlantic ridge. To mimic as close as possible environmental conditions, the cultures were performed in oligotrophic medium with nitrogen, hydrogen and carbon dioxide (N(2)/H(2)/CO(2)) gas sweeping.

Presence and activity of anaerobic ammonium-oxidizing bacteria at deep-sea hydrothermal vents.

Recent studies indicate that ammonia is an important electron donor for the oxidation of fixed nitrogen, both in the marine water column and sediments. This process, known as anammox, has so far only been observed in a large range of temperature habitats. The present study investigated the role of anammox in hydrothermal settings.