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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...

Halden

(Encyclopedia)Halden hälˈdən [key], town, Østfold co., SE Norway, a port on the Iddefjord (an arm of th...

cleavage

(Encyclopedia)cleavage, tendency of many minerals to split along definite smooth planar surfaces determined by their crystal structure. The directions of these surfaces are related to weaknesses in the atomic struc...

grouper

(Encyclopedia)grouper, common name for a large carnivorous member of the family Serranidae (sea bass family), abundant in tropical and subtropical seas and highly valued as food fish. There are several genera, nota...

titration

(Encyclopedia)titration tītrāˈshən [key], gradual addition of an acidic solution to a basic solution or vice versa (see acids and bases); titrations are used to determine the concentration of acids or bases in ...

L'Huillier, Anne

(Encyclopedia)Anne L'Huillier, 1958–, b. Paris, France, French-Swedish physicist, studied at Université Pierre et Marie Curie, Paris, and Commissariat à l’Energ...

Argonne National Laboratory

(Encyclopedia)Argonne National Laboratory, research center, based in Argonne, Ill., 27 mi (43 km) SW of downtown Chicago, with other facilities at the Idaho National Engineering Laboratory, 50 mi (80 km) W of Idaho...

nucleon

(Encyclopedia)nucleon, term applying to both the proton and the neutron, the two constituents of atomic nuclei. The nucleon may be considered a single particle, of which the proton and the neutron are two different...

chiffon

(Encyclopedia)chiffon shĭfŏnˈ [key], plain-weave, lightweight, sheer, transparent fabric made of cotton, silk, or synthetic fiber; it is made of fine, highly twisted, strong yarn. Chiffon is difficult to handle,...

transmutation of elements

(Encyclopedia)transmutation of elements, conversion of one chemical element into another. The expression has both historical and contemporary significance. The transmutation of certain metals into gold by means of ...