Staining of cells (IMAGE) Universität Bayreuth Caption In order to be able to distinguish whether a microplastic particle has been absorbed by a cell or only adheres to the cell, the cells are stained. Credit Photo: UBT/Chr. Wissler Usage Restrictions None 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.