General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

vivianite

Science; General science

A hydrated ferrous phosphate mineral, with the formula Fe 3 (PO 4 ) 2 ·8H 2 O, for which the vivianite group is named. Other important members of this group are annabergite and erythrite.

talc

Science; General science

A hydrated magnesium layer silicate (phyllosilicate) with composition close to Mg 3 Si 4 O 10 (OH) 2 . Limited substitution of aluminum (Al) or titanium (Ti) for silicon (Si) and of iron (Fe), ...

wavellite

Science; General science

A hydrated phosphate of aluminum mineral with composition Al 3 (OH) 3 (PO 4 ) 2 · 5H 2 O, in which small amounts of fluorine and iron may substitute for the hydroxyl group (OH) and aluminum (Al), ...

triterpene

Science; General science

A hydrocarbon or its oxygenated analog containing 30 carbon atoms and composed of six isoprene units. Triterpenes form the largest group of terpenoids, but are classified into only a few major ...

alkene

Science; General science

A hydrocarbon that contains a carbon-carbon double bond (C = C); dienes or polyenes contain two or more double bonds. The synonym olefin is often used, especially in connection with ...

A hydrocarbon with a chemistry similar to that of benzene. Aromatic hydrocarbons are either benzenoid or nonbenzenoid. Benzenoid aromatic hydrocarbons contain one or more benzene rings and are by far ...

water tunnel

Science; General science

A hydrodynamic facility used for research, test, and evaluation, comprising a well-guided and controlled stream of water in which items for test are placed. The water tunnel is in many ways similar ...