Columbia Encyclopedia

(Encyclopedia) Constantius II, 317–61, Roman emperor, son of Constantine I. When the empire was divided (337) at the death of Constantine, Constantius II was given rule over Asia Minor, Syria, and Egypt, while his...

(Encyclopedia) Triglav trēˈgläv [key], peak, 9,392 ft (2,863 m) high, Slovenia, in the Julian Alps, near the Italian and Austrian borders. It is the Julian Alps' highest peak. ...

(Encyclopedia) free radical, in chemistry, a molecule or atom that contains an unpaired electron but is neither positively nor negatively charged. Free radicals are usually highly reactive and unstable. They are pro...

(Encyclopedia) Jovian (Flavius Claudius Jovianus) jōˈvēən [key], c.331–364, Roman emperor (363–64). The commander of the imperial guard under Julian the Apostate in his Persian campaign, Jovian was proclaime...

(Encyclopedia)  CE5 Alkenes alkene ălˈkēn [key], any of a group of aliphatic hydrocarbons whose molecules contain one or more carbon-carbon double bonds (see chemical bond). Alkenes with only one double bond h...

(Encyclopedia)  CE5 Alkynes alkyne ălˈkīn [key], any of a group of aliphatic hydrocarbons whose molecules contain one or more carbon-carbon triple bonds (see chemical bond). Alkynes with one triple bond have t...

(Encyclopedia) WikiLeaks: see Assange, Julian.

(Encyclopedia) Malina, Judith: see Beck, Julian. ...

(Encyclopedia) Péguy, Charles shärl pāgēˈ [key], 1873–1914, French poet and writer. Of a poor, working family, he won scholarships and made a brilliant record as a student. He left the École normale supérie...

(Encyclopedia) organometallic chemistry, the reactions and use of a class of compounds (R-M) that contain a covalent bond between carbon and metal. They are prepared either by direct reaction of the metal with an or...