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carbonyl group

(Encyclopedia)carbonyl group kärˈbənĭl [key], in chemistry, functional group that consists of an oxygen atom joined by a double bond to a carbon atom. The carbon atom is joined to the remainder of the molecule ...

Cohen-Tannoudji, Claude Nessim

(Encyclopedia)Cohen-Tannoudji, Claude Nessim, 1933–, French physicist, b. Algeria, Ph.D. École Normale Supérieure, Paris, 1962. He has continued his research at the École Normale Supérieure, and was a profess...

Hall, Samuel Read

(Encyclopedia)Hall, Samuel Read, 1795–1877, American educator and clergyman, b. Croydon, N.H. After teaching in Rumford, Maine, and Fitchburg, Mass., he founded (1823) at Concord, Vt., a training school for teach...

Twachtman, John Henry

(Encyclopedia)Twachtman, John Henry twäktˈmən [key], 1853–1902, American landscape painter and etcher, b. Cincinnati. He studied in Cincinnati under Duveneck and in Munich and Paris, but was influenced princip...

Platt, Charles Adams

(Encyclopedia)Platt, Charles Adams, 1861–1933, American architect, landscape architect, painter, and etcher, b. New York City. He studied etching with Stephen Parrish and painting, in Paris, under Boulanger and L...

Salem, cities, United States

(Encyclopedia)Salem. 1 City (1990 pop. 38,091), seat of Essex co., NE Mass., on an inlet of Massachusetts Bay; inc. 1629. Its once famous harbor has silted up. Salem has electronic, leather, and machinery industrie...

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....

Teton Range

(Encyclopedia)Teton Range, part of the Rocky Mts., NW Wyo. and SE Idaho, just S of Yellowstone National Park. The highest peaks are within Grand Teton National Park, with Grand Teton (13,747 ft/4,190 m) the highest...

Schwartz, Delmore

(Encyclopedia)Schwartz, Delmore, 1913–66, American poet, b. New York City, grad. New York Univ., 1935. He was an editor of the Partisan Review (1943–55). His first work, In Dreams Begin Responsibilities, includ...

Ponselle, Rosa

(Encyclopedia)Ponselle, Rosa pŏnzĕlˈ [key], 1897–1981, American operatic soprano, b. Meriden, Conn. First appearing in vaudeville, she made her debut (1918) at the Metropolitan Opera in Verdi's La forza del de...