Micromotor (IMAGE) University of Gothenburg Caption The outside of the micromotor in this study is coated with the chemical compound laccase. This enables the motor to convert the urea in the water into ammonia. Credit Institute of Chemical Research of Catalonia (ICIQ) Usage Restrictions None License Original 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.