Examining Surfaces (IMAGE) Universität Bayreuth Caption Prof. Dr.-Ing. Gregor Lang examining microbial infestation via scanning electron microscopy. Credit Photo: UBT / Christian Wißler. 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.