vials (IMAGE) California Institute of Technology Caption The vial at the left contains a solution with a fluorescent pigment bound within a mechanophore. At right, the pigment has been released from the mechanophore with ultrasound. Credit Caltech Usage Restrictions Must credit Caltech 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.