Madeline Monroe, Rice University (IMAGE) Rice University Caption Rice University graduate student Madeline Monroe led a project to use layered filter paper to mimic aortic heart valves. The technique allows researchers to study in detail how calcifying diseases slow or stop hearts from functioning. Credit Jeff Fitlow/Rice 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.