Tannic acid crystals, light micrograph

Tannic acid crystals, light micrograph

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Credit: MAREK MIS/SCIENCE PHOTO LIBRARY

Caption: Tannic acid crystals. Polarized light micrograph of a section through crystals of tannic acid (tricarboxylic acid). Tannic acid is a commercial form of tannin, an astringent polyphenolic compound that binds to and precipitates proteins and various other organic compounds including amino acids and alkaloids. Magnification: x400 when printed at 10 centimetres tall.

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Keywords: abstract, astringent, biochemical, biochemistry, chemical, chemistry, colorful, colors, colourful, colours, compound, crystal, crystals, light micrograph, microcrystal, microcrystals, microscopy, nature, no-one, nobody, organic chemistry, pattern, patterns, photomicrograph, polarised light, polyphenolic, section, sectioned, tannic acid, tannin, tannins, tannoid

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