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Integrated Pest Management

(Encyclopedia)Integrated Pest Management (IPM), planned program that coordinates economically and environmentally acceptable methods of pest control with the judicious and minimal use of toxic pesticides. IPM progr...

Hsia

(Encyclopedia)Hsia shēä [key], semilegendary first dynasty of China, which ruled, according to traditional dates, from c.2205 b.c. to c.1766 b.c. or, according to some modern scholars, from c.1994 b.c. to c.1523 ...

War Production Board

(Encyclopedia)War Production Board (WPB), former U.S. government agency, established (Jan., 1942) by executive order to direct war production and the procurement of materials in World War II. The chairman (Donald M...

Tooele

(Encyclopedia)Tooele to͞oĭlˈə [key], city (1990 pop. 13,887), seat of Tooele co., N central Utah, a rapidly growing suburb of Salt Lake City, in a farm area; inc. 1853. A major source of employment is the Tooel...

Seeckt, Hans von

(Encyclopedia)Seeckt, Hans von häns fən zākt [key], 1866–1936, German general. He fought in Poland, Serbia, Romania, and Turkey during World War I. In 1920 he was made chief of the Reichswehr—the German army...

uranium

(Encyclopedia)uranium yo͞orāˈnēəm [key], radioactive metallic chemical element; symbol U; at. no. 92; mass number of most stable isotope 238; m.p. 1,132℃; b.p. 3,818℃; sp. gr. 19.1 at 25℃; valence +3, +4...

deuterium

(Encyclopedia)deuterium do͞otērˈēəm [key], isotope of hydrogen with mass no. 2. The deuterium nucleus, called a deuteron, contains one proton and one neutron. Deuterium is also called heavy hydrogen, and water...

inorganic chemistry

(Encyclopedia)inorganic chemistry, the study of all the elements and their compounds with the exception of carbon and its compounds, which fall under the category of organic chemistry. Inorganic chemistry investiga...

Mottelson, Benjamin Roy

(Encyclopedia)Mottelson, Benjamin Roy, 1926–, Danish physicist, b. Chicago, Ph.D. Harvard, 1950. Raised and educated in the United States, he moved to Denmark, where he began work as a nuclear physicist. Mottelso...

Waterford, town, United States

(Encyclopedia)Waterford, town (1990 pop. 17,930), New London co., SE Conn., on Long Island Sound; settled c.1653, inc. as a separate town from New London, 1801. Mainly residential, it has a recording and film studi...