Loeb , Jacques

Loeb , Jacques
(1859–1924) German–American physiologist
Loeb was born at Mayen in Germany. After studying medicine at Strasbourg, he settled in America (1891) where he held professorships at Bryn Mawr College, Pennsylvania, and the universities of Chicago and California, before becoming a member of the Rockefeller Institute for Medical Research (1910).
Much of Loeb's major research was concerned with plant and animal tropisms (involuntary movements in response to stimuli such as light, water, and gravity); he postulated that these occur not only in primitive animals but also in higher animals, including man (Forced Movements, Tropisms, and Animal Conduct, 1918). He also carried out important work on artificial parthenogenesis, showing that unfertilized frogs' eggs could be induced to divide by altering their environment. Another discovery was that sea-urchin eggs are hatched by the osmotic pressure exerted by various substances dissolved in water.

Scientists. . 2011.

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  • LOEB, JACQUES — (1859–1924), U.S. physiological chemist. Born near Strasbourg, Alsace, into a family of Portuguese and Italian origin, Loeb studied medicine. He immigrated to the U.S. and became professor of physiology at the University of California (1902–10),… …   Encyclopedia of Judaism

  • Loeb, Jacques — ▪ German biologist born April 7, 1859, Mayen, near Koblenz, Prussia [now in Germany] died Feb. 11, 1924, Hamilton, Bermuda  German born American biologist noted chiefly for his experimental work on artificial parthenogenesis (reproduction without …   Universalium

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  • Jacques Loeb — (Mayen cerca de Coblenza 7 de abril de 1859 Hamilton en las islas Bermudas 11 de febrero de 1924) fue un fisiólogo y biólogo estadounidense nacido en Alemania …   Wikipedia Español

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  • Jacques Loeb — Pour les articles homonymes, voir Loeb. Jacques Loeb Jacques Loeb est un biologiste américain d’origine allemande, né le 7  …   Wikipédia en Français

  • Jacques Loeb — (* 7. April 1859 in Mayen bei Koblenz; † 11. Februar 1924 in Hamilton auf den Bermuda Inseln) war ein deutsch amerikanischer Biologe, der als einer der Begründer der sich etwa ab 1880 entwickelnden experimentellen Forschungsrichtung in der… …   Deutsch Wikipedia

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