Thalassiosira pseudonana (image) DOE/Pacific Northwest National Laboratory Share Print E-Mail Caption This is a side and overhead view of the microscopic marine diatom Thalassiosira pseudonana. PNNL scientists used this species to develop a fluorescent biosensor that changes its glow in the presence of the sugar ribose. Credit Nils Kröger, Universität Regensburg Usage Restrictions Credit required 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.