1. WIEM: Spemann Hans spemann hans (18691941), niemiecki embriolog, 1919-1935 profesor uniwersytetu we Fryburgu Bryzgowijskim. Twórca teorii indukcji http://www.encyklopedia.pl/wiem/009d48.html

WIEM 2004 - zobacz now± edycjê encyklopedii! Kup abonament i encyklopediê na CD-ROM, sprawd¼ ofertê cenow±! Oferta specjalna abonamentów dla szkó³ i instytucji! Uwaga! Przedstawione poni¿ej has³o pochodzi z archiwalnej edycji WIEM 2001! Prace redakcyjne nad edycj± 2001 zosta³y zakoñczone. Zapraszamy do korzystania z nowej, codziennie aktualizowanej i wzbogacanej w nowe tre¶ci edycji WIEM 2004 Medycyna, Niemcy Spemann Hans Spemann Hans (1869-1941), niemiecki embriolog , 1919-1935 profesor uniwersytetu we Fryburgu Bryzgowijskim. Twórca teorii indukcji embriologicznej. Nagroda Nobla w dziedzinie medycyny w 1935 za odkrycie istoty uk³adu "organizatorów" w rozwoju zarodkowym. WIEM zosta³a opracowana na podstawie Popularnej Encyklopedii Powszechnej Wydawnictwa Fogra zobacz wszystkie serwisy do góry

2. MSN Encarta - Search Results - Spemann Hans Encarta Search results for spemann hans . Page 1 of 1. Found in the NobelPrize Winners table. 4. Magazine and news articles about spemann hans *. http://encarta.msn.com/Spemann_Hans.html

MSN Home My MSN Hotmail Shopping ... Money Web Search: logoImg('http://sc.msn.com'); Encarta Subscriber Sign In Help Home ... Upgrade to Encarta Premium Search Encarta Encarta Search results for "Spemann Hans" Page of 1 Exclusively for MSN Encarta Premium Subscribers Spemann, Hans Article—Encarta Encyclopedia Spemann, Hans (1869-1941), German embryologist and winner of the 1935 Nobel Prize for his description of the processes by which cells in an embryo... related items amphibian used by Spemann in experiments history of cloning illustration, Spemann’s experiments see also ... Hans Spemann Picture—Encarta Encyclopedia Picture from Encarta Encyclopedia Nobel Prize, Physiology or Medicine Chart or Table—Encarta Encyclopedia Found in the Nobel Prize Winners table Magazine and news articles about Spemann Hans Encarta Magazine Center Search the Encarta Magazine Center for magazine and news articles about "Spemann Hans" Books about Spemann Hans Exclusively for MSN Encarta Premium Subscribers Page of 1 Results from MSN Search Spemann, Hans - Spemann's Induction Experiments

3. About Hans Spemann Hans Spemann. Hans Spemann was born on June 27, 1869, in StuttgartGermany. German embryologist who was awarded the Nobel Prize for http://bio.p9.org.uk/

Hans Spemann Hans Spemann was born on June 27, 1869, in Stuttgart Germany. German embryologist who was awarded the Nobel Prize for Physiology or Medicine in 1935 for his discovery of the effect now known as embryonic induction, the influence exercised by various parts of the embryo that directs the development of groups of cells into particular tissues and organs. Spemann, initially a medical student, attended the universities of Heidelberg, Munich, and Wurzburg and graduated in zoology, botany, and physics. He worked at the Zoological Institute of Wurzburg (1894-1908), held a professorship at Rostock (1908-14), was director of the Kaiser Wilhelm Institute for Biology in Berlin (1914-19), and occupied the chair of zoology at Freiburg (1919-35). Spemann's concept of induction was based upon a lifetime of research into the early development of the newt. His work showed that, in the earliest stages, the fate of the embryonic parts has not been determined: if a piece of presumptive skin tissue is excised and transplanted into an area of presumptive nervous tissue, it will form nervous tissue, not skin. These results illuminated not only normal processes of development but also the origin of congenital abnormalities. Spemann summarized his researches in Experimentelle Beitrage zu einer Theorie der Entwicklung (1936; Embryonic Development and Induction). Experiments This page is for genreal information purposes only. The sources of this information is found in the bibliography.

4. WIEM: Spemann Hans spemann hans (18691941), niemiecki embriolog, 1919-1935 profesor uniwersytetuwe Fryburgu Bryzgowijskim. Medycyna, Niemcy spemann hans (1869-1941). http://wiem.onet.pl/wiem/009d48.html

WIEM 2004 - zobacz now± edycjê encyklopedii! Kup abonament i encyklopediê na CD-ROM, sprawd¼ ofertê cenow±! Oferta specjalna abonamentów dla szkó³ i instytucji! Uwaga! Przedstawione poni¿ej has³o pochodzi z archiwalnej edycji WIEM 2001! Prace redakcyjne nad edycj± 2001 zosta³y zakoñczone. Zapraszamy do korzystania z nowej, codziennie aktualizowanej i wzbogacanej w nowe tre¶ci edycji WIEM 2004 Medycyna, Niemcy Spemann Hans Spemann Hans (1869-1941), niemiecki embriolog , 1919-1935 profesor uniwersytetu we Fryburgu Bryzgowijskim. Twórca teorii indukcji embriologicznej. Nagroda Nobla w dziedzinie medycyny w 1935 za odkrycie istoty uk³adu "organizatorów" w rozwoju zarodkowym. WIEM zosta³a opracowana na podstawie Popularnej Encyklopedii Powszechnej Wydawnictwa Fogra zobacz wszystkie serwisy do góry

5. Hans Spemann Hans Spemann. Hans Spemann (18691941 and organs. External links. Webpage about Hans Spemann. This article is from Wikipedia. All text http://www.fact-index.com/h/ha/hans_spemann.html

Main Page See live article Alphabetical index Hans Spemann Hans Spemann ) was a German embryologist who was awarded the Nobel Prize for Physiology or Medicine in for his discovery of the effect now known as embryonic induction, the influence exercised by various parts of the embryo that directs the development of groups of cells into particular tissues and organs. External links Web page about Hans Spemann This article is from Wikipedia . All text is available under the terms of the GNU Free Documentation License

6. Hans Spemann Translate this page Hans spemann hans Spemann (1869-1941) fue un embriólogo alemán que fue distinguidocon el Premio Nobel de Medicina en 1935 por el descubrimiento del efecto http://www.guajara.com/wiki/es/wikipedia/h/ha/hans_spemann.html

Hans Spemann Hans Spemann ) fue un embriólogo alemán que fue distinguido con el Premio Nobel de Medicina en por el descubrimiento del efecto conocido en la actualidad como inducción embriológica. Enlaces externos Sitio sobre Hans Spemann (En inglés) Tagoror.com CineBSO Radioaficionados.net Tacoronte Guia ... Deranet El contenido de Wikipedia se publica bajo la Datos de Contacto

7. ThinkQuest : Library : Conceiving A Clone Hans Spemann. Web Link Biography of Hans Spemann. http://library.thinkquest.org/24355/data/details/profiles/spemann.html

Index Life Science Genetics Conceiving a Clone Trace cloning technology from its beginnings to today's exciting biotechnology developments. Learn about techniques for "conceiving a clone." But not everyone agrees on the answers to the ethical and moral questions raised by this biological tinkering. Should humans be cloned? Join the discussion and let your views be known! Discover what countries around the world are doing to regulate cloning experimentation. Languages: English. Visit Site 1998 ThinkQuest Internet Challenge Awards Second Place Languages English Students Kayvon Round Rock High School, Round Rock, TX, United States Brandon Round Rock High School, Round Rock, TX, United States Bennett Round Rock High School, Round Rock, TX, United States Coaches Edwin Round Rock High School Library, Round Rock, TX, United States Mark San Francisco, CA, United States Want to build a ThinkQuest site? The ThinkQuest site above is one of thousands of educational web sites built by students from around the world. Click here to learn how you can build a ThinkQuest site.

8. Biography Of Hans Spemann Hans Spemann (18691941). Hans Spemann studied embyogenesis on the newt embryoby transplantation and by cutting off the circulation to certain tissues. http://www.fml.tuebingen.mpg.de/spemann.htm

Hans Spemann (1869-1941) The biography : Hans Spemann was born in Stuttgart on June 27th, 1869. 1908 Professor in Rostock und Head of the Institute of Zoology, Rostock 1913 Head of the Department for Development and Causal Morphology of the newly founded 'Kaiser-Willhelm-Institute of Biology' in Berlin-Dahlem 1919 Head of the Institute of Zoology, Freiburg 1935 Nobel price for Medicine Hans Spemann died in Freiburg on September 12th, 1941 Hans Spemann studied embyogenesis on the newt embryo by transplantation and by cutting off the circulation to certain tissues. One of his most famous experiments together with H. Mangold was the transplantation of the blastopol lip in a Triturus embryo, wich led to the formation of a second body axsis, like in siamese twins. On vertebrate eyes, he discovered the induction of different Anlagen, for example the induction of the lens from epidermal tissue. For the first time he tried to find causal relations between different events of the embryogenesis. He was the first zoologist to recieve the Nobel price. Document last modified March 10th, 1998 by

9. Hans Spemann Hans Spemann. Hans Spemann (18691941) byl Nemec pletiv a varhany. Externíspojení. Internetová stránka okolo Hans Spemann. Toto je strojový http://wikipedia.infostar.cz/h/ha/hans_spemann.html

švodn­ str¡nka Tato str¡nka v origin¡le Hans Spemann Hans Spemann ) byla němčina embryologist kdo byl udělen Nobelova cena pro fyziologii nebo medic­nu v pro jeho objev ºÄinku nyn­ zn¡m©ho jako z¡rodečn© přeruÅ¡en­, vliv vykon¡van½ různ½mi č¡stmi embrya, kter© ř­d­ v½voj skupin buňek do zvl¡Å¡tn­ch tk¡n­ a org¡ny. VnějÅ¡­ spojen­ Internetov¡ str¡nka o Hansi Spemann Toto je strojov½ překlad čl¡nku z encyklopedie Wikipedia . Cel½ text je dostupn½ za podm­nek GNU FDL licence

10. Hans Spemann - Wikipedia Translate this page Druckversion. Nicht angemeldet Anmelden Hilfe. Andere Sprachen English. Hans Spemann.aus Wikipedia, der freien Enzyklopädie. Hans Spemann (* 27. http://de.wikipedia.org/wiki/Hans_Spemann

Hans Spemann aus Wikipedia, der freien Enzyklopädie Hans Spemann 27. Juni in Stuttgart 9. September in Freiburg im Breisgau ) war ein deutscher Biologe Spemann führte bereits 1902 erste wichtige Versuche zur Zellteilung durch. Es gelang ihm beispielsweise, die beiden Zellen des Zwei-Zell-Stadiums eines Salamanders zu trennen, wodurch er künstlich Zwillinge erzeugte. Durch dieses Experiment und weitere Versuche an mehrzelligen Embryonalstadien wurde nachgewiesen, dass die Furchungszellen eines Embryos auf frühen Entwicklungsstadien noch sämtliche für die weitere Entwicklung notwendige Erbinformationen beinhalten. Seit 1919 war Spemann Professor in Freiburg im Breisgau erhielt er für die Entdeckung des Organisator -Effektes während der Embryonalentwicklung den Nobelpreis für Medizin . Er hatte durch Transplantations -Expermente an der frühen Gastrula nachgewiesen, dass sich ein Gewebe ortsspezifisch verhält, also sich gemäß der Stelle, an die das Gewebe in die Empfänger-Gastrula verpflanzt wurde, entwickelt, und nicht gemäß der Herkunftsstelle im Spenderorganismus. Die Zellen waren in diesem frühen Entwicklungsstadium noch nicht determiniert . Bei Transplantationsexperimenten an der späten Gastrula ergab sich dagegen ein anderer Effekt: Hier entwickelte sich das Transplantat herkunftsgemäß. Das heißt, das Gewebe war nun determiniert.

11. Hans Spemann - Information An online Encyclopedia with information and facts Hans Spemann Information, anda wide range of other subjects. Hans Spemann - Information. deHans Spemann. http://www.book-spot.co.uk/index.php/Hans_Spemann

Hans Spemann - Information Home Mathematical and natural sciences Applied arts and sciences Social sciences and philosophy ... Interdisciplinary categories adsonar_pid=2712;adsonar_ps=1199;adsonar_zw=120;adsonar_zh=600;adsonar_jv='ads.adsonar.com'; Hans Spemann ) was a German embryologist who was awarded the Nobel Prize for Physiology or Medicine in for his discovery of the effect now known as embryonic induction, the influence exercised by various parts of the embryo that directs the development of groups of cells into particular tissues and organs. External links Web page about Hans Spemann de:Hans Spemann All text is available under the terms of the GNU Free Documentation License (see for details). . Wikipedia is powered by MediaWiki , an open source wiki engine.

12. EXtrabooks.de Translate this page Spemann, Magarete. Stunden mit Hans Thoma. Pauline, 15,50, in den Warenkorb.Spemann, Friedrich Wilhelm. spemann hans - Forschung und Leben. http://www.literaturnetz.com/extra/extrabooks/SHOP0/PROGRAM/ARTIKEL/listartikel.

13. Hans Spemann - Biography hans spemann – Biography. hans spemann was born on June 27, 1869, atStuttgart. He was the eldest son of the publisher, Wilhelm spemann. http://www.nobel.se/medicine/laureates/1935/spemann-bio.html

Hans Spemann was born on June 27, 1869, at Stuttgart. He was the eldest son of the publisher, Wilhelm Spemann. From 1878 until 1888 he went to the Eberhard-Ludwig School at Stuttgart and when he left school in 1888 he spent a year in his father's publishing business. From 1889-1890 he did his military service and then, after a period as a retail bookseller, he entered, in 1891, the University of Heidelberg . There, until he took his preliminary examination in 1893, he studied medicine, and was especially attracted by the work of the comparative anatomist there, Carl Gegenbaur. During the winter of 1893-1894 he studied at the University of Munich , where he became more closely acquainted with August Pauly - a fact of great importance to him. From the spring of 1894 to the end of 1908, he worked in the Zoological Institute at the . In 1895 he took his degree in zoology, botany, and physics (subjects to serve his anatomical studies), having worked under Theodor Boveri, Julius Sachs, and , all of whom had the greatest influence on his scientific development.

14. Medicine 1935 hans spemann. Germany. The Nobel Prize in Physiology or Medicine 1935 PresentationSpeech hans spemann Biography Nobel Lecture Banquet Speech. prev 1934, 1936 next. http://www.nobel.se/medicine/laureates/1935/

The Nobel Prize in Physiology or Medicine 1935 "for his discovery of the organizer effect in embryonic development" Hans Spemann Germany University of Freiburg im Breisgau Breisgau, Germany b. 1869 d. 1941 The Nobel Prize in Physiology or Medicine 1935 Presentation Speech Hans Spemann Biography ... Banquet Speech The 1935 Prize in: Physics Chemistry Physiology or Medicine Literature ... Peace Find a Laureate: SITE FEEDBACK CONTACT TELL A FRIEND Last modified October 16, 2003 The Official Web Site of The Nobel Foundation

15. Spemann, Hans spemann, hans. ( b. June 27, 1869, Stuttgart, Württemberg now in Germanyd spemann, initially a medical student, attended the universities of Heidelberg, Munich, and Würzburg and http://www.britannica.com/nobel/micro/560_31.html

Spemann, Hans Nobel Prize for Physiology or Medicine in 1935 for his discovery of the effect now known as embryonic induction, the influence exercised by various parts of the embryo that directs the development of groups of cells into particular tissues and organs. Spemann's concept of induction was based upon a lifetime of research into the early development of the newt. His work showed that, in the earliest stages, the fate of the embryonic parts has not been determined: if a piece of presumptive skin tissue is excised and transplanted into an area of presumptive nervous tissue, it will form nervous tissue, not skin. These results illuminated not only normal processes of development but also the origin of congenital abnormalities. Spemann summarized his researches in Embryonic Development and Induction).

16. Hans Spemann's Contributions To Developmental Biology Contains information about hans spemann 1935 Nobel Laureate in Medicine http://bio.p9.org.uk/hans_spemann.html

Hans Spemann Hans Spemann was born on June 27, 1869, in Stuttgart Germany. Spemann's name will always be associated with the work he did on experimental embryology. He made himself a master of micro-surgical technique. In 1924, while working on the relatively large eggs of amphibians he discovered, together with Hilde Mangold, the existence of an area in the embryo, the portions of which, upon transplantation into a different part of a second embryo ,induced the secondary embryonic primordia. The name "organizer centre" or "organizer" was given by him to those parts. For this discovery of the organizer effect in embryonic development, he was awarded the Nobel Prize in 1935. Later Spemann showed that different parts of the organization centre produced different parts of the embryo. The anterior parts of it tend to produce parts of the head, and the posterior parts of it parts of the tail. Further, tail organizers, when they are grafted into the head region of another embryo, may produce heads instead of tails, the reason being that they are influenced by the head organizer in their new environment. Earlier Spemann had transplanted the optic cups of new embryos into the outermost layer of the region of the abdomen and had found that they induced the production, in this new situation, of a lens of the eye. This was interpreted as being evidence of the existence of secondary organizers which operate after the induction exerted by the primary organizer has been completed.

17. Spemann's Induction Experiments A Selective History of Induction II. spemann's induction experiments. A. spemann's lens induction experiments That same year, hans spemann (3) published "one of the most significant and seminal http://zygote.swarthmore.edu/regul2.html

A Selective History of Induction II. Spemann's induction experiments A. Spemann's lens induction experiments In 1901, Curt Herbst wrote that he thought it possible "to establish the occurrence of formative stimuli which are exerted from one part of the embryo to another, and to demonstrate eventually the possiblity of a complete resolution of the entire ontogenesis into a sequence of such inductions." This prediction of inductive cascades was a bold statement, given that no sequence of events had yet been observed (1, 2). But that was soon to change. That same year, Hans Spemann (3) published "one of the most significant and seminal papers in the history of embryology" (4), his experimental analysis of lens formation in the frog. Spemann cauterized the prospective retina anlagen in the neurula stage Rana fusca Rana palustris (a related American frog) and got the opposite results: free lenses which were not connected to an eye. King's paper sent Spemann back to the laboratory where he did the identical experiment on different species of frog neurulae. He confirmed both his earlier results and Helen King's results (7). There was a component of induction that was species-specific. There appeared to be two ways to make a lens: induction or self-determination. Spemann put this result in the context of a model proposed the previous yearconcerning the operculum of amphibian tadpoles. When the limbs of amphibian tadpoles arise during metamorphosis, they emerge through an opening called the operculum. It had been thought that the limbs mechanically pushed through this barrier. However, when Herman Braus removed the forelimb rudiments, the operculum still openned at the appropriate time. Braus explained this phenomenon by introducing the engineering term "double assurance" into embryology (6). Spemann (8) maintained that double assurance also worked for amphibian lenses, and that while some frogs had only one mechanism of lens determination, most species were in between and had some self-differentiation but still required contact for optimum lens formation.

18. AllRefer Encyclopedia - Hans Spemann (Cell Biology, Biographies) - Encyclopedia AllRefer.com reference and encyclopedia resource provides complete information on hans spemann, Cell Biology, Biographies. Includes related research links. Cell Biology, Biographies hans spemann. By Alphabet Encyclopedia AZ S. hans spemann, Cell hans spemannhans shpA´mAn Pronunciation Key, 18691941, German embryologist http://reference.allrefer.com/encyclopedia/S/Spemann.html

AllRefer Channels :: Health Yellow Pages Reference Weather SEARCH : in Reference June 05, 2004 You are here : AllRefer.com Reference Encyclopedia Cell Biology, Biographies ... Hans Spemann By Alphabet : Encyclopedia A-Z S Hans Spemann, Cell Biology, Biographies Related Category: Cell Biology, Biographies Hans Spemann [hAns shp A Pronunciation Key Embryonic Development and Induction Topics that might be of interest to you: embryo Encyclopedia U com Check out around 175,000 brief encyclopedia articles on almost all topics. Related Categories: Medicine Biographies People Science and Technology ... Biographies More articles from AllRefer Reference on Hans Spemann Encyclopedia U com Check out around 175,000 brief encyclopedia articles on almost all topics. Content on this web site is provided for informational purposes only. We accept no responsibility for any loss, injury or inconvenience sustained by any person resulting from information published on this site. We encourage you to verify any critical information with the relevant authorities. About Us Contact Us Privacy Links Directory ... Link to AllRefer.com

19. Hans Spemann Winner Of The 1935 Nobel Prize In Medicine hans spemann, a Nobel Prize Laureate in Physiology and Medicine, at the Nobel Prize Internet Archive. hans spemann. 1935 Nobel Laureate in Medicine Links added by Nobel Internet Archive visitors. hans spemann Bio And Photo http://www.almaz.com/nobel/medicine/1935a.html

H ANS S PEMANN 1935 Nobel Laureate in Medicine for his discovery of the organizer effect in embryonic development. Background Residence: Germany Affiliation: University of Freiburg im Breisgau Featured Internet Links Search WWW Search The Nobel Prize Internet Archive Links added by Nobel Internet Archive visitors Hans Spemann Bio And Photo (submitted by Kirk) Hans Spemann Experiments (submitted by Kirk) Hans Spemann - Biography (submitted by Davis Brown) Memories of Professor Hans Spemann's (submitted by Johns) Back to The Nobel Prize Internet Archive Literature Peace Chemistry ... Medicine We always welcome your feedback and comments

20. Hans Spemann Winner Of The 1935 Nobel Prize In Medicine hans spemann, a Nobel Prize Laureate in Physiology and Medicine, at the NobelPrize Internet Archive. hans spemann. 1935 Nobel Laureate in Medicine http://almaz.com/nobel/medicine/1935a.html

H ANS S PEMANN 1935 Nobel Laureate in Medicine for his discovery of the organizer effect in embryonic development. Background Residence: Germany Affiliation: University of Freiburg im Breisgau Featured Internet Links Search WWW Search The Nobel Prize Internet Archive Links added by Nobel Internet Archive visitors Hans Spemann Bio And Photo (submitted by Kirk) Hans Spemann Experiments (submitted by Kirk) Hans Spemann - Biography (submitted by Davis Brown) Memories of Professor Hans Spemann's (submitted by Johns) Back to The Nobel Prize Internet Archive Literature Peace Chemistry ... Medicine We always welcome your feedback and comments

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