Jonathan Willker (1 of 2) (IMAGE) Purdue University Caption Jonathan Wilker, professor of inorganic chemistry, studies shellfish to develop adhesives that are more sustainable and stronger, and work in a wider range of environments than current adhesives. Credit Purdue University photo/Rebecca McElhoe 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.