Dr. Arne Kappenberg (1 of 2) (image) University of Bonn Share Print E-Mail Caption from the Institute of Crop Science and Resource Conservation (INRES) at the University of Bonn equids the gas chromatograph. Credit (c) Photo: Volker Lannert/Uni Bonn Usage Restrictions This photo may be used with the press release. Share Print E-Mail 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.