Integral Controller (IMAGE) ETH Zurich Caption The scientists developed an integral controller (represented in front as a circuit diagram) for Escherichia coli bacteria. Credit ETH Zurich / Christine Khammash 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.