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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.

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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

Convention on Psychotropic Substances

Convention on Psychotropic Substances The Convention on Psychotropic Substances is a United Nations treaty designed to control psychoactive drug s such as amphetamine s, barbiturate s, and psychedelics . During the 1960s, drug use increased greatly around the world, especially in Western nations. more

Proteasome

Proteasome Proteasomes are large protein complex es inside all eukaryote s and archaea , as well as in some bacteria . In eukaryotes, they are located in the nucleus and the cytoplasm .Peters JM, Franke WW, Kleinschmidt JA. (1994) Distinct 19S and 20S subcomplexes of the 26S proteasome and their more

Helicobacter pylori

Helicobacter pylori Helicobacter pylori () is a Gram-negative , microaerophilic , and acidophilic bacterium that infects various areas of the stomach and duodenum . Many cases of peptic ulcer s, gastritis , duodenitis , and perhaps some cancer s are caused by H. pylori infections. However, man more

Antioxidant

Antioxidant glutathione . The yellow sphere is the redox-active sulfur atom that provides antioxidant activity, while the red, blue, white, and dark grey spheres represent oxygen, nitrogen, hydrogen, and carbon atoms, respectively. An antioxidant is a molecule capable of slowing or preventing th more

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