 Hi, I'm Makayla Taravis and I recently finished my PhD in the Ancient Lab at Cornell University. One of our research interests is the physiology of electro-respiring bacteria, which breathe using solid metal oxides or conductive electrodes as they terminal electron acceptor. Our recent paper in Biotechnology and Bioengineering focuses on the physiology of Shawanella Onydensis in anode chambers of bio-electrochemical systems. Shawanella Onydensis differs from other model organisms for bio-electrochemical systems in that it can use solid electron acceptors or oxygen for respiration. We were interested in investigating what happens when Shawanella is exposed to both oxygen and an electrode at the same time. Contrary to conventional wisdom, Shawanella is actually capable of producing more electric current in bio-electrochemical systems when it's exposed to oxygen than when it isn't. This effect is greater in continuous flow systems than in batch-fed systems. This is because Shawanella typically produces electric current through transferring its electrons through soluble electron shadow molecules and these are washed out or essentially diluted in continuous flow systems. We found that when we add oxygen to a continuous flow system this stimulates the Shawanella cells to grow and produce electron shadow molecules at a faster rate which overcomes the dilution and allows them to produce more electric current. These results deepen our understanding of Shawanella in bio-electrochemical systems and show us that oxygen isn't always bad for current production in these systems. We think this is especially important for the development of biosensing type applications where the overall current production signal is much more important than the electron capture efficiency and we hope that these results will help future bio-electrochemical applications. Thanks for watching and I hope you'll check out our full paper on the Biotechnology and Bioengineering website. Thanks.