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Rydberg, Johannes Robert

(Encyclopedia)Rydberg, Johannes Robert yo͞oˈhänəs rôˈbərt rüdˈbĕryə [key], 1854–1919, Swedish physicist. Rydberg was a professor at Lund from 1901 to 1919. He is best known for his grouping of the freq...

Bednorz, Johannes Georg

(Encyclopedia)Bednorz, Johannes Georg yōhänˈəs gāôrkhˈ bĕdˈnôrts [key], 1950–, German physicist. After earning his doctorate from the Swiss Federal Institute of Technology, he began (1982) work at the I...

Potgieter, Everhardus Johannes

(Encyclopedia)Potgieter, Everhardus Johannes āvərhärˈdəs yōhänˈəs pôtˈgētər [key], 1808–75, Dutch critic, essayist, and poet. He was the first editor (1837–65) of and a major contributor to De Gids...

Purkinje, Johannes Evangelista

(Encyclopedia)Purkinje, Johannes Evangelista yōhänˈəs āˌväng-gālĭsˈtä po͝orˈkĭnyā [key], 1787–1869, Czech physiologist. While professor (1823–50) at the Univ. of Breslau he pioneered in establish...

Stark, Johannes

(Encyclopedia)Stark, Johannes, 1874–1957, German physicist, Ph.D. Univ. of Munich, 1897. From 1900 until he retired in 1922, Stark served short stints on the faculties of several academic institutions, including ...

Jensen, Johannes Vilhelm

(Encyclopedia)Jensen, Johannes Vilhelm yōhänˈəs vĭlˈhĕlm yĕnˈsən [key], 1873–1950, Danish writer. As a young man he studied medicine; his interest in biology and anthropology is obvious throughout his w...

Jørgensen, Jens Johannes

(Encyclopedia)Jørgensen, Jens Johannes yĕns yōhäˈnəs yörˈgənsən [key], 1866–1956, Danish poet and religious writer. He reacted against the naturalism of Georg Brandes and, in such works as Poems (1898),...

Wolf, Markus Johannes

(Encyclopedia)Wolf, Markus Johannes vôlf [key], 1923–2006, East German spymaster. A legendary cold-war espionage chief, he was called “the man without a face” because until 1978 there was no known photograp...

Witteveen, H. Johannes

(Encyclopedia)Witteveen, H. Johannes (Hendrikus Johannes Witteveen), 1921–2019, Dutch economist and political leader. After receiving his doctorate from the Netherlands School of Economics (now Erasmus Univ. Rott...

Brahms, Johannes

(Encyclopedia)Brahms, Johannes brämz, Ger. yōhänˈnĕs bräms [key], 1833–97, German composer, b. Hamburg. Brahms ranks among the greatest masters of the romantic period. The son of a musician, he early showed...