Pan Liao (IMAGE) Purdue University Caption Pan Liao, a postdoctoral researcher at Purdue, works in the Dudareva laboratory. Liao was first author of a paper describing the biosynthesis of thymol, carvacrol and thymohydroquinone; molecular compounds with medicinal properties found in some herbs. Credit Purdue University photo/Tom Campbell Usage Restrictions No restrictions. License Public Domain 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.