Diatom Alga, Arachnoidiscus #1
by Eric Grave
Title
Diatom Alga, Arachnoidiscus #1
Artist
Eric Grave
Medium
Photograph - Photograph
Description
Diatom alga. Light micrograph of the disk-shaped diatom Arachnoidiscus ehrenbergi. Diatoms, members of a division of the algae family, are microscopic unicellular organisms that occur abundantly in marine and freshwater plankton. They form an important part of the food chain. The body is composed of two halves, which fit together like a tiny pill box. The cell walls contain silica, which is preserved in deposits known as siliceous or diatomaceous earths (ooze). Once hardened into rock it is called diatomite. The high porosity of this rock enables it to be used for filters, fillers and as a mild abrasive. Magnification x213 at 35mm size.
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March 14th, 2013
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