Melamine Detection in Water (IMAGE) University of Miami Caption Visual color and turbidity changes of gold nanoparticles resulted from different concentrations of melamine (decreasing from left to right). Credit Fang Wei and Na LI 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.