Shewanella oneidensis MR-1 (IMAGE) DOE/Pacific Northwest National Laboratory Caption Pacific Northwest National Laboratory scientists are studying the bacterium Shewanella oneidensis strain MR-1 in the Microbial Cell Project. The bacterium may be a potential biological solution to U.S. Department of Energy sites contaminated during the manufacture of nuclear weapons. This image shows Shewanella oneidensis strain MR-1 growing on the surface of the iron oxide mineral hematite. Credit Courtesy of Pacific Northwest National Laboratory. Usage Restrictions Image courtesy of Pacific Northwest National Laboratory. Use of image shall not claim any expressed or implied affiliation with, or endorsement by, Battelle Memorial Institute, Pacific Northwest National Laboratory or the U.S. Department of Energy. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.