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chemical industry

(Encyclopedia)chemical industry, the business of using chemical reactions to turn raw materials, such as coal, oil, and salt, into a variety of products. During the 19th and 20th cent. technological advances in the...

chemical reaction

(Encyclopedia)chemical reaction, process by which one or more substances may be transformed into one or more new substances. Energy is released or is absorbed, but no loss in total molecular weight occurs. When, fo...

chemical warfare

(Encyclopedia)chemical warfare, employment in war of incendiaries, poison gases, and other chemical substances. Ancient armies attacking or defending fortified cities threw burning oil and fireballs. A primitive ty...

free radical

(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...

alkene

(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...

Stockdale, James Bond

(Encyclopedia)Stockdale, James Bond, 1923–2005, U.S. naval officer, b. Abingdon, Ill.; grad. U.S. Naval Academy, 1947. A fighter pilot and highly decorated career naval officer (1946–79), he was the highest ran...

Bond, Carrie Jacobs

(Encyclopedia)Bond, Carrie Jacobs, 1862–1946, American songwriter, b. Janesville, Wis. A self-taught musician, she composed about 175 songs, both words and music, gave concerts of them, and even published them he...

Bond, George Phillips

(Encyclopedia)Bond, George Phillips, 1825–65, American astronomer, b. near Boston, grad. Harvard, 1845. He became the assistant of his father, William Cranch Bond, and in 1859 succeeded him as director of the Har...

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