Columbia Encyclopedia

(Encyclopedia) bronze, in metallurgy, alloy of copper, tin, zinc, phosphorus, and sometimes small amounts of other elements. Bronzes are harder than brasses. Most are produced by melting the copper and adding the de...

(Encyclopedia) Potosí pōtōsēˈ [key], city (1992 pop. 112,078), capital of Potosí dept., S Bolivia, at the foot of one of the world's richest ore mountains. In the cold, bleak, high Andes at an altitude of c.13...

(Encyclopedia) de La Renta, Oscar (Óscar Arístides de la Renta Fiallo) də lə räNˈtə, rĕnˈtə [key], 1932–2014, Dominican-American fashion designer, b. Santo Domingo, Dominican Republic. He studied in Madr...

(Encyclopedia) Dubuque, Julien dəbyo͞okˈ [key], 1762–1810, pioneer settler of Iowa, b. Nicolet co., Que. Setting out at a young age for the West, Dubuque reached Prairie du Chien, in what is now Wisconsin, by 1...

(Encyclopedia) antisense, DNA or RNA manipulated in a laboratory so that its components (nucleotides) form a complementary copy of normal, or “sense,” messenger RNA (mRNA; see nucleic acid). Antisense techniques...

(Encyclopedia) ibuprofen īˈbyo͞oprōˌfən [key], nonsteroidal anti-inflammatory drug (NSAID) that reduces pain, fever, and inflammation. Along with naproxen and ketoprofen, ibuprofen belongs to the propionic aci...

(Encyclopedia) hemorrhage hĕmˈərĭj [key], escape of blood from the circulation (arteries, veins, capillaries) to the internal or external tissues. The term is usually applied to a loss of blood that is copious e...

(Encyclopedia) Heng Samrin hĕng sämˈrĭn [key], 1934–, Cambodian politician. He was president of Cambodia from 1979 to 1991 and headed the Communist party from 1981 to 1991. A regimental commander of the Khmer ...

(Encyclopedia) yaws or frambesia, tropical infection of the skin caused by a spirochete (Treponema pertenue) closely related to that causing syphilis. Yaws, however, is not a sexually transmitted disease, i.e., it i...

(Encyclopedia) Vladikavkaz vlədyēˈkävkäz [key], city (1989 pop. 300,000), capital of North Ossetia-Alania, SE European Russia, on the Terek River and at the northern foot of the Caucasus. It is the starting poi...