Jixun Zhan, Utah State University (IMAGE) Utah State University Caption USU Associate Professor of Biological Engineering Jixun Zhan has secured a patent for the production of a natural blue dye known as indigoidine. Credit USU Engineering 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.