Adding Solvents (IMAGE) University at Buffalo Caption A researcher in the Organic and Stable Isotope Biogeochemistry Lab at UB, led by Assistant Professor of Geology Elizabeth Thomas, adds solvents to glass columns holding organic matter from lake sediment. This process enables scientists to separate out leaf waxes and bacterial lipids for further analysis. Though the samples shown here were not used in the new study, the methods depicted reflect the research team's procedures. Credit Douglas Levere / University at Buffalo Usage Restrictions This image may only be used in news reports discussing the research in the related press release. License Licensed 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.