Helmut Coelfen, University of Konstanz (IMAGE) University of Konstanz Caption Professor Helmut Coelfen, professor of Physical Chemistry at the University of Konstanz. Credit University of Konstanz Usage Restrictions None 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.