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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  • 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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  • LOEB, LEO — (1869–1959), pathologist and pioneer in cancer research. Loeb, who was born in Mayen, Germany, immigrated to the United States in 1900 and held a variety of academic and research posts until 1910, when he settled in St. Louis, Missouri. From 1915 …   Encyclopedia of Judaism

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