Gabriel Rodriguez and Shota Atsumi, UC Davis (image) University of California - Davis Share Print E-Mail Caption UC Davis graduate student Gabriel Rodriguez, left, and Shota Atsumi, assistant professor of chemistry sample a culture of E. coli engineered to produce a sweet-smelling ester. Esters are key to the $20 billion-a-year scents and flavorings industry, but almost all are currently derived from oil and gas. New technology invented at UC Davis allows specific esters to be made by microbes. Credit Andy Fell/UC Davis Usage Restrictions Please acknowledge source. 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.