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Perutz, Max Ferdinand

(Encyclopedia)Perutz, Max Ferdinand, 1914–2002, British molecular biologist, b. Vienna. One of the pioneers in the field of molecular biology, Perutz studied chemistry at the Univ. of Vienna (1932–36) and then ...

Frederick I, elector of Brandenburg

(Encyclopedia)Frederick I, 1371–1440, elector of Brandenburg (1415–40), first of the Hohenzollerns (see Hohenzollern, family) to rule Brandenburg. As Frederick VI, burgrave of Nuremburg, he served under King Si...

explosive

(Encyclopedia)explosive, substance that undergoes decomposition or combustion with great rapidity, evolving much heat and producing a large volume of gas. The reaction products fill a much greater volume than that ...

Dillenius, Johann Jakob

(Encyclopedia)Dillenius, Johann Jakob dĭlāˈnēəs [key], 1687–1747, English botanist, of German birth. He published catalogs of the plants of Eltham, Kent, and of Geissen, Germany, and a work on mosses that pl...

Eckermann, Johann Peter

(Encyclopedia)Eckermann, Johann Peter yōhänˈ pāˈtər ĕkˈərmän [key], 1792–1854, German scholar and author. He assisted Goethe in various literary labors, was professor of English and German at the Univ. ...

De Kalb, Johann

(Encyclopedia)De Kalb, Johann: see Kalb, Johann. ...

Döbereiner, Johann Wolfgang

(Encyclopedia)Döbereiner, Johann Wolfgang yōˈhän vôlfˈgäng döˈbərīnər [key], 1780–1849, German chemist. From 1810 he was professor of the Univ. of Jena. He is known especially for his discovery of sim...

Droysen, Johann Gustav

(Encyclopedia)Droysen, Johann Gustav yōhänˈ go͝osˈtäf droiˈzən [key], 1808–84, German historian. A member of the Frankfurt Parliament, he was a leading proponent of German unification under the leadership...

Albrechtsberger, Johann Georg

(Encyclopedia)Albrechtsberger, Johann Georg yōˈhän gāˈôrk älˈbrĕkhtsbĕrˌgər [key], 1736–1809, Austrian musical theorist, teacher, and composer. He became (1772) court organist in Vienna and later was ...

Encke, Johann Franz

(Encyclopedia)Encke, Johann Franz yōˈhän fränts ĕngˈkə [key], 1791–1865, German astronomer. He was assistant (1816–22) and director (1822–25) of the observatory at Seeberg (near Gotha) and director (fr...