Food-coloring Dyes Disinfection (IMAGE) Purdue University Caption This image shows the work of Purdue University innovators as they develop a new approach to airborne disinfection using food-coloring dyes. Credit Young Kim/Purdue University 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.