James Dumesic and Jeremy Luterbacher, Wisconsin Energy Institute (image) University of Wisconsin-Madison Share Print E-Mail Caption UW-Madison researchers James Dumesic and Jeremy Luterbacher use a plant-derived chemical, called gamma valerolactone or GVL, to produce a concentrated stream of sugars. Luterbacher (right) holds a vial containing light colored concentrated sugar solution, which spontaneously separates from the dark GVL when high salt or high sugar concentrations are present or when liquid carbon dioxide is added to the mixture. Credit Matthew Wisniewski/Wisconsin Energy Institute 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.