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Diploneis freshwater diatom, light micrograph
Differential interference contrast (DIC) light micrograph of the freshwater diatom Diploneis sp. Diploneis belongs to the pennate diatoms (penna: Latin for feather). The single cells contain two wall chloroplasts whose brown colour is caused by the dye fucoxanthin. The picture shows a shell view of the cell. The focus is on the outside of the shell with the longitudinal raphe and the fine transverse stripes on the outside of the cell. Magnification: x600 at a print width of 10 centimetres., by GERD GUENTHER/SCIENCE PHOTO LIBRARY
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