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mercurous chloride

(Encyclopedia)mercurous chloride, mercury (I) chloride, or calomel, chemical compound, Hg2Cl2, a white crystalline powder, very slightly soluble in water. It was once used medicinally as a purgative, cathartic, li...

Sturza, Dimitrie A.

(Encyclopedia)Sturza or Sturdza, Dimitrie A. both: dēmēˈtrēyĕ sto͝orˈdzə [key], 1833–1914, Romanian statesman, of a prominent Moldavian family. With Ion Bratianu and Constantin Rosetti he helped bring abo...

Mitchell, Peter Dennis

(Encyclopedia)Mitchell, Peter Dennis, 1920–92, British chemist, Ph.D. Cambridge, 1950. A professor at the Univ. of Edinburgh (1955–63), Mitchell was named director of Glynn Research Laboratories in 1964. He for...

Duhem, Pierre Maurice Marie

(Encyclopedia)Duhem, Pierre Maurice Marie pyĕr mōrēsˈ märēˈ düĕmˈ [key], 1861–1916, French physicist and philosopher and historian of science. After studying at the École Normale Supérieure he taught ...

Hell, Stefan Walter

(Encyclopedia)Hell, Stefan Walter, 1962–, German physicist, Ph.D. Heidelberg Univ., 1990. Hell worked at the European Molecular Biology Laboratory in Heidelberg (1991–93) and at the Univ. of Turku in Finland (1...

Rowland, Frank Sherwood

(Encyclopedia)Rowland, Frank Sherwood, 1927–2012, American chemist, b. Delaware, Ohio, Ph.D. Univ. of Chicago, 1952. Rowland taught at Princeton from 1952 to 1956 and at the Univ. of Kansas from 1956 to 1964, whe...

radiation sickness

(Encyclopedia)radiation sickness, harmful effect produced on body tissues by exposure to radioactive substances. The biological action of radiation is not fully understood, but it is believed that a disturbance in ...

Munich, Technical University of

(Encyclopedia)Munich, Technical University of, at Munich, Germany; founded 1868 by King Ludwig II, acquired its present name 1970. It has three main campuses, with faculties of architecture, business administration...

Aston, Francis William

(Encyclopedia)Aston, Francis William, 1877–1945, English physicist and chemist. He was affiliated with the Cavendish Laboratory, Cambridge, from 1910. In 1922 he received the Nobel Prize in Chemistry mainly for h...

transactinide elements

(Encyclopedia)transactinide elements trănsˌăkˈtənīdˌ [key], in chemistry, elements with atomic numbers greater than that of lawrencium (at. no. 103), the last member of the actinide series. See transuranium ...