Dr. Norbert Mitzel, Bielefeld University (IMAGE) Bielefeld University Caption This is professor Dr. Norbert Mitzel with the improved gas electron diffractometer. Credit Bielefeld University Usage Restrictions The image may only be used with appropriate caption or credit. 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.