(IMAGE) Max Planck Institute for Chemical Ecology Caption Ian Keesey is injecting a headspace odor collection sample from plant tissue into the GC-MS for separation, analysis and identification. Credit Anna Schroll 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.