Samples (image) Bielefeld University Caption Hundreds of samples were needed to reach success: The synthetic biofilter developed by Bielefeld University's iGEM team can filter out estrogens from contaminated water. Credit iGEM-Team Bielefeld-Germany Usage Restrictions The image may only be used with appropriate caption or credit. 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.