Biogenic substance
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A biogenic substance is a product made by or of life forms. While the term originally was specific to metabolite compounds that had toxic effects on other organisms, it has developed to encompass any
Crude oil, a transformed biogenic substance
Natural gum, a secretion from Hevea brasiliensis
Biogenic sediment: limestone containing fossils
Oncolitic limestone: the spheroidal oncolites are formed via deposition of calcium carbonate by cyanobacteria
Biogenic silica
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Biogenic silica, also referred to as opal, biogenic opal, or amorphous opaline silica, forms one of the most widespread biogenic minerals. For example, microscopic particles of silica called phytolith
Biogenic substance
…Biogenic amine receptor Biogenic silica Biogenic sulfide corrosion…
Diatoms are capable of synthesizing silica glass in vivo.
Diatomaceous earth as viewed under bright field illumination on a light microscope. Diatomaceous earth is made up of diatom cell walls, an example of biogenic silica. Silica is synthesised in the diatom cell by the polymerisation of silicic acid. This image of diatomaceous earth particles in water is at a scale of 6.236 pixels/μm, the entire image covers a region of approximately 1.13 by 0.69 mm.