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A sample of food-grade diatomaceous earth
A sample of food-grade diatomaceous earth
Scanning electron micrograph of diatomaceous earth
Scanning electron micrograph of diatomaceous earth
c. 1900–1910 Diatomaceous earth pit at Neuohe
c. 1900–1910 Diatomaceous earth pit at Neuohe
c. 1900–1910 a drying area: One firing pile is being prepared; another is under way.
c. 1900–1910 a drying area: One firing pile is being prepared; another is under way.
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Diatom
Diatom
Intricate structures of the diatom Areolae (hexagonal or polygonal boxlike perforation with a sieve present on the surface of diatom) Striae (pores, p
Intricate structures of the diatom Areolae (hexagonal or polygonal boxlike perforation with a sieve present on the surface of diatom) Striae (pores, punctae, spots or dots in a line on the surface) Raphe (slit in the valves) Central nodule (thickening of wall at the midpoint of raphe) Stigmata (holes through valve surface which looks rounded externally but with a slit like internal) Punctae (spots or small perforations on the surface) Polar nodules (thickening of wall at the distal ends of the raphe)
Selections from Ernst Haeckel's 1904 Kunstformen der Natur (Art Forms of Nature), showing pennate (left) and centric (right) frustules.
Selections from Ernst Haeckel's 1904 Kunstformen der Natur (Art Forms of Nature), showing pennate (left) and centric (right) frustules.
Light microscopy of a living diatom. Numbered graduations are 10 micrometres apart
Light microscopy of a living diatom. Numbered graduations are 10 micrometres apart