The Perfect Shot of Espresso Every Time With Chemistry (image) American Chemical Society Share Print E-Mail Caption Refining the espresso brewing process could result in money saved and consistently tasty coffee. Credit Photo credit: Charlie Litchfield, University of Oregon Usage Restrictions Please credit Charlie Litchfield, University of Oregon, for the photo. 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.