(shpā′män′), Hans 1869-1941.
German zoologist and physiologist. He won a 1935 Nobel Prize for his discovery of the organizer effect in embryonic development.
References in periodicals archive ?
111) Walter Sutton hypothesized in 1902 that "chromosomes hold the genetic information in the nucleus," twelve years later Hans Spemann was able to perform the first successful nuclear transfer (112) experiment.
In his book, Embryonic Development and Induction, Spemann proposed "a fantastical experiment to transfer one cell's nucleus into an egg without a nucleus, providing the basis for subsequent cloning experiments.
Early in the 20th century, German biologist Hans Spemann separated two cells of a salamander zygote using a strand of his daughter's hair.
The first significant step towards understanding the issue was made nearly a century ago in experiments conducted by the German embryologists Hans Spemann and Hilde Mangold.
encounters, Goldschmidt happened to be present when Hans Spemann gave
Some of these factors inducing apoptosis under genetic control -as the Nieuwkoop head organizer and the body axis organizer, which are both equivalent to the Spemann organizer center- are related to the transforming growth factor-beta [TGF-beta] superfamily, demonstrated to play a key role in the development and differentiation of the mammary gland, together with FGF control proliferation and cellular differentiation phenomena.
1901 Hans Spemann splits a two-cell newt embryo into two parts, successfully producing two larvae.
4) Hans Vaihinger, Kommentar zu Kants Kritik der reinen Vernunft (Stuttgart: Spemann, 1881-86); Norman Kemp-Smith, A Commentary to Kant's `Critique of Pure Reason', (London: Macmillan Publisher, Ltd.
Friedric Portheim, Uber den dekorativen Stil in der altchristlichen Kunst (Stuttgart: Spemann, 1886), pp.
For several years, Niehrs and his colleagues have studied a region of the growing embryo known as the Spemann organizer.
In 1938, just a few years before his death, the famous German embryologist Hans Spemann pondered a long-debated idea called nuclear equivalency.
The Lim1 result jibes with Nobel prize-winning work by German embryologist Hans Spemann in the 1920s.