Aortic Heart Valves (image) Rice University Share Print E-Mail Caption Rice University researchers are configuring 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 Share Print E-Mail 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.