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Holden, Oliver

(Encyclopedia)Holden, Oliver hōlˈdən [key], 1765–1844, American composer and compiler of hymns, b. Shirley, Mass. His popular tune Coronation, to Edward Perronet's hymn All Hail the Power of Jesus' Name, first...

formula, in chemistry

(Encyclopedia)formula, in chemistry, an expression showing the chemical composition of a compound. Formulas of compounds are used in writing the equations (see chemical equations) that represent chemical reactions....

Stoddart, James Fraser

(Encyclopedia)Stoddart, James Fraser, 1942–, British chemist, Ph.D. Univ. of Edinburgh, 1966. He began his career at Sheffield Univ., England, in 1970, then moved to Birmingham Univ., England, in 1990, the Univ. ...

nutrition

(Encyclopedia)nutrition, study of the materials that nourish an organism and of the manner in which the separate components are used for maintenance, repair, growth, and reproduction. Nutrition is achieved in vario...

polymer

(Encyclopedia)CE5 A. Addition polymerization: Two ethylene molecules, C2H4, combine to form two links in the polyethylene chain molecule (C2H4)n. B. Condensation polymerization: Two glycine molecules, NH2CH2COOH...

melting point

(Encyclopedia)melting point, temperature at which a substance changes its state from solid to liquid. Under standard atmospheric pressure different pure crystalline solids will each melt at a different specific tem...

Feringa, Bernard Lucas

(Encyclopedia)Feringa, Bernard Lucas, 1951–, Dutch organic chemist, Ph.D. Univ. of Groningen, Netherlands, 1978. He has been on the faculty at the Univ. of Groningen since 1984. Feringa was jointly awarded the 20...

metric system

(Encyclopedia)CE5 metric system, system of weights and measures planned in France and adopted there in 1799; it has since been adopted by most of the technologically developed countries of the world. It is based...

Gramme, Zénobe-Théophile

(Encyclopedia)Gramme, Zénobe-Théophile zānôbˈ tāôfēlˈ gräm [key], 1826–1901, Belgian electrical engineer. While working as a model maker for a Parisian manufacturer of electrical devices, Gramme became ...

Canonsburg

(Encyclopedia)Canonsburg, borough (2020 pop. 8,672), Washington co., SW Pa., inc. 1802. Its steel and coal industries have declined significantly. A gram of radium pr...