Ignacio Vargas Barca, McMaster University (IMAGE) McMaster University Caption This is Ignacio Vargas Barca, Associate Professor in McMaster University's Department of Chemistry and Chemical Biology. Credit Sarah Janes, McMaster 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.