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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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Uranium

Uranium Uranium () is a white/black metal lic chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. It has 92 proton s and electron s, 6 of them valence electron s. It can have between 141 and 146 neutron s, with 143 and 146 in its most co 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

Nicotinamide adenine dinucleotide

Nicotinamide adenine dinucleotide Nicotinamide adenine dinucleotide, abbreviated NAD+, is a coenzyme found in all living cell s. The compound is a dinucleotide, since it consists of two nucleotide s joined through their phosphate groups: with one nucleotide containing an adenosine ring, and the 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

Black pepper

Black pepper Black pepper (Piper nigrum) is a flowering vine in the family Piperaceae , cultivated for its fruit , which is usually dried and used as a spice and seasoning . The same fruit is also used to produce white pepper, red/pink pepper, and green pepper. Black pepper is native to South more

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