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Pyruvaldehyde is the aldehyde form of pyruvic acid. It has two carbonyl groups, so it is a dicarbonyl compound. It is both an aldehyde and a ketone. It is used as a reagent in organic synthesis, as a flavoring agent, and in tanning. It has been demonstrated as an intermediate in the metabolism of acetone and its derivatives in isolated cell preparations, in various culture media, and in vivo in certain animals.

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Quartz is the second most abundant mineral in the Earth's continental crust, after feldspar. There are many different varieties of quartz, several of which are semi-precious gemstones.Its been the most commonly used minerals in the making of jewelry and hardstone carvings. Quartz is used in the making of sandpaper, optics, glass, liquid filters, circuit boards, computer components, cement , mortar, and jewelry. Quartz crystals are also piezoelectric meaning when an electrical current passes through them they vibrate a small amount. Time can be measured from the vibrations of the quartz crystals so quartz crystals are often used in clocks.

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