<i>Hyphomicrobium sp.</i> (IMAGE) Helmholtz Association Caption The electron micrograph shows bacteria (Hyphomicrobium sp.; Yellow) growing up partly on solid surfaces, floors and sediment grains. During growth whatsoever cells die and deformed or fragmenting cell envelopes remain. Small-scale fragments of these shells (red) then set the microparticulate matrix in soils and sediments. Credit Photo: Burkhard Schmidt-Brücken, Institute of Material Science/Dresden University of Technology Colored by: Christian Schurig, Helmholtz Centre for Environmental Research 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.