Caffeine crystals, light micrograph

Caffeine crystals, light micrograph

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Credit: DAVID PARKER/SCIENCE PHOTO LIBRARY

Caption: Caffeine crystals. Polarised light micrograph of crystals of caffeine (1,3,7-trimethylxanthine). Caffeine stimulates the central nervous system increasing alertness and deferring fatigue. Caffeine is also a diuretic (increases the removal of water from the body) and has laxative properties. It is widely known for its presence in coffee beans and tea leaves.

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Keywords: alertness, biochemical, biochemistry, biological, biology, caffeine, chemical, chemistry, coffee, colourful, colours, compound, compounds, crystal, crystalline, crystals, diuretic, drug, laxative, light micrograph, light microscope, multicoloured, neurobiology, neurological, neurology, patchwork, pattern, polarised light micrograph, polarised light microscope, purgative, stimulant, stimulating, stimulation, stimulative, tea, trimethylxanthine, xanthine

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