Microbial electrosynthesis of acetate from CO under hypersaline conditions.

Microbial electrosynthesis (MES) enables the bioproduction of multicarbon compounds from CO using electricity as the driver. Although high salinity can improve the energetic performance of bioelectrochemical systems, acetogenic processes under elevated salinity are poorly known. Here MES under 35-60 g L salinity was evaluated.

Diverse Microorganisms in Sediment and Groundwater Are Implicated in Extracellular Redox Processes Based on Genomic Analysis of Bioanode Communities.

Extracellular electron transfer (EET) between microbes and iron minerals, and syntrophically between species, is a widespread process affecting biogeochemical cycles and microbial ecology. The distribution of this capacity among microbial taxa, and the thermodynamic controls on EET in complex microbial communities, are not fully known. Microbial electrochemical cells (MXCs), in which electrodes serve as the electron acceptor or donor, provide a powerful approach to enrich for organisms capable of EET and to study their metabolism.

Changes in protein expression across laboratory and field experiments in Geobacter bemidjiensis.

Bacterial extracellular metal respiration, as carried out by members of the genus Geobacter, is of interest for applications including microbial fuel cells and bioremediation. Geobacter bemidjiensis is the major species whose growth is stimulated during groundwater amendment with acetate. We have carried out label-free proteomics studies of G.

Application of dual-focus fluorescence correlation spectroscopy to microfluidic flow-velocity measurement.

Several methods exist to measure and map fluid velocities in microfluidic devices, which are vital to understanding properties on the micro- and nano-scale. Fluorescence correlation spectroscopy (FCS) is a method traditionally exploited for its ability to measure molecular diffusion coefficients. However, several reports during the past decade have shown that FCS can also be successfully used to measure precise flow rates in microfluidics with very high spatial resolution, making it a competitive alternative to other common flow-measurement methods.