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Hamden

(Encyclopedia)Hamden, town (2020 pop. 61,169), New Haven co., S Conn.; inc. 1786. The town, settled c.1638, was named for John Hampden, the ...

Fischer, Ernst Otto

(Encyclopedia)Fischer, Ernst Otto, 1918–2007, German chemist, Ph.D. Technical Univ. of Munich (TUM), 1952. Fischer was a professor at TUM (1954–57) and the Univ. of Munich (1957–64). He returned to TUM in 196...

trinitrotoluene

(Encyclopedia)trinitrotoluene or TNT trīˌnīˌtrōtŏlˈyo͞oēn [key], CH3C6H2(NO2)3, crystalline, aromatic compound that melts at 81℃. It is prepared by the nitration of toluene. Trinitrotoluene is a high exp...

Novara

(Encyclopedia)Novara nōväˈrä [key], city (1991 pop. 101,112), capital of Novara prov., Piedmont, N Italy. It is an agricultural and industrial center and a rail junction. Manufactures include textiles, chemical...

Oshawa

(Encyclopedia)Oshawa ŏshˈəwə [key], city (1991 pop. 129,344), SE Ont., Canada, a port on Lake Ontario; since 1974 it has been part of the regional municipality of Durham (1991 pop. 409,070). Oshawa is the home ...

Vannes

(Encyclopedia)Vannes vän [key], town (1990 pop. 48,454), capital of Morbihan dept., NW France, in Brittany, on the Gulf of Morbihan. It is an important agricultural and tourist center that produces processed food,...

solder

(Encyclopedia)solder sŏdˈər [key], metal alloy used in the molten state as a metallic binder. The type of solder to be used is determined by the metals to be united. Soft solders are commonly composed of lead an...

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...

hydrogen chloride

(Encyclopedia)hydrogen chloride, chemical compound, HCl, a colorless, poisonous gas with an unpleasant, acrid odor. It is very soluble in water and readily soluble in alcohol and ether. It fumes in moist air. It is...

leaching

(Encyclopedia)leaching, method of extraction in which a solvent is passed through a mixture to remove some desired substance from it. A simple example is the passage of boiling water through ground coffee to dissol...