Diatoms have cell walls called frustules that contain opaline silica and fine pores. The tiny pores in the frustules make them a useful filtering material for a wide range of industrial products, including beer and jet fuel.
Two interphase cells with immunofluorescence labeling of actin filaments (purple), microtubules (yellow), and nuclei (green). This image won first place in the Nikon 2003 Small World photo competition. The Cell: An Image Library - Image
This is a live image of the of Diatom Arachnoidiscus under magnification. The picture shows the diatom's silicified cell wall, which forms a pillbox-like shell (frustule) composed of overlapping halves that contain intricate and delicate markings.
infinity-imagined: “Scanning electron micrographs of diatoms, microscopic algae that form the base of the food chain and produce of Earth’s oxygen. ” The beautiful base of the pyramid of biology, feeding our air, land and life.