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VX

(Encyclopedia)VX vēˈĕks [key], nerve gas several times more toxic than sarin but less volatile. It kills within minutes if inhaled or deposited on the skin; protection from VX would require both protective suits...

Wald, George

(Encyclopedia)Wald, George, 1906–97, American biochemist, b. New York City, Ph.D. Columbia, 1932. He spent most of his career on the faculty at Harvard. In 1967 Wald, Haldan K. Hartline, and Ragnar Granit receive...

Tatum, Edward Lawrie

(Encyclopedia)Tatum, Edward Lawrie, 1909–75, American geneticist, b. Boulder, Colo., grad. Univ. of Wisconsin (B.A., 1931; M.S., 1932; Ph.D., 1935). From 1937 to 1945 he taught at Stanford and from 1945 to 1948 a...

Stendal

(Encyclopedia)Stendal shtĕnˈdäl [key], city (1994 pop. 47,252), Saxony-Anhalt, N central Germany, on the Uchte River. It is a major rail junction and has sugar refineries, metalworks, food canneries, and chemica...

Zhanjiang

(Encyclopedia)Zhanjiang or Chankiang both: jän-jyäng [key], Cantonese Tsamkong, official Chinese name for the former French territory of Kwangchowan (325 sq mi/840 sq km) on Guangzhou Bay, S Guangdong prov., Chin...

Bernoulli

(Encyclopedia)Bernoulli or Bernouilli both: bĕrno͞oyēˈ [key], name of a family distinguished in scientific and mathematical history. The family, after leaving Antwerp, finally settled in Basel, Switzerland, whe...

lanthanum

(Encyclopedia)lanthanum lănˈthənəm [key] [Gr.,=to lie hidden], metallic chemical element; symbol La; at. no. 57; at. wt. 138.90547; m.p. about 920℃; b.p. about 3,460℃; sp. gr. 6.19 at 25℃; valence +3. Lan...

argon

(Encyclopedia)argon ärˈgŏn [key] [Gr.,=inert], gaseous chemical element; symbol Ar; at. no. 18; at. wt. 39.948; m.p. −189.2℃; b.p. −185.7℃; density 1.784 grams per liter at STP; valence 0. Argon is a col...

amino group

(Encyclopedia)amino group, in chemistry, functional group that consists of a nitrogen atom attached by single bonds to hydrogen atoms, alkyl groups, aryl groups, or a combination of these three. An organic compound...

germanium

(Encyclopedia)germanium jərmāˈnēəm [key] [from Germany], semimetallic chemical element; symbol Ge; at. no. 32; at. wt. 72.63; m.p. 937.4℃; b.p. 2,830℃; sp. gr. 5.323 at 25℃; valence +2 or +4. Pure german...