Joachim Curtius and His Team (IMAGE) Goethe University Frankfurt Caption Mario Simon, Martin Heinritzi, Andreas Kürten, Andrea Wagner and Joachim Curtius are with the mass spectrometer they developed. This is used to measure the highly oxygenated multifunctional organic molecules and molecule clusters, which are responsible for particle generation and particle growth in the recent CLOUD experiments. Credit Uwe Dettmar 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.