Zihui Zhou with test sample of COF-999 (IMAGE) University of California - Berkeley Caption UC Berkeley graduate student Zihui Zhou with a 100 milligram test sample of COF-999. The sample was placed in the analyzer behind Zhou to measure carbon dioxide adsorption from an air mixture similar to that of ambient air. Credit Robert Sanders, UC Berkeley Usage Restrictions none License Original 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.