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chemeurope.com's Encyclopedia of Chemistry provides articles for 64,557 entries from chemistry, pharmaceutics and material sciences as well as related scientific disciplines.

Definitions

Speed of light :"Lightspeed" redirects here. For other uses, see Lightspeed (disambiguation) . :For other uses of "speed of light", see speed of light (disambiguation) The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celerit more

Gas tungsten arc welding

Gas tungsten arc welding Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld . The weld area is protected from atmospheric contamination by a shielding gas (usually an inert more

Elias Ashmole

Elias Ashmole , c. 1681, below. Elias Ashmole (23 May 1617 – 18 May 1692 ), the celebrated English antiquary , was a politician , officer of arms , student of astrology and alchemy , and an early speculative Freemason . He supported the royalist side during the English Civil War , and at the more

History of saffron

History of saffron fresco from the excavation of Akrotiri on the Aegean island of Santorini . The history of saffron in human cultivation and use reaches back more than 3,000 years. and spans many cultures, continents, and civilizations. Saffron , a spice derived from the dried stigmas of t more

Sun

Sun The Sun () is the star at the center of the Solar System . It is a medium size star. The Earth and other matter (including other planet s, asteroid s, meteoroid s, comet s and dust ) orbit the Sun, which by itself accounts for about 99.8% of the solar system 's mass . Energy from the Sun, more

Chemical elements