41. 1928: First Nuclear Transfer Experiment Conducted By Hans Spemann 1928 First Nuclear transfer experiment conducted by hans spemann. In 1928, GermanDr. hans spemann performed the first nuclear transfer experiment with http://library.thinkquest.org/C0122429/history/1928.htm

1928: First Nuclear transfer experiment conducted by Hans Spemann In 1928, German Dr. Hans Spemann performed the first nuclear transfer experiment with salamander embryos , where he transferred the nucleus of a salamander embryonic cell into a cell with no nucleus. Using a strand of hair, he tightened a loop around a newly fertilized egg, until he separated the nucleus and some of the cytoplasm The side with the nucleus divided until it has sixteen cells. Spemann then loosened the loop and let the nucleus from one of the embryonic cells to move over into the cytoplasm of the other side. He tightened the loop even more and separated the cytoplasm with the new nucleus from the other embryo A normal salamander embryo grew from that cell. This experiment proved that the nucleus of an early embryo cell can lead to the growth of a complete organism. Back to timeline Back to main

42. Spemann And Mangold’s Discovery Of The Organizer hans spemann and Hilde Mangold’s demonstration (published in 1924) of the Enter hans spemann, an energetic, imaginative and technically highly skilled http://www.bioinfo.org.cn/book/Great Experments/great30.htm

43. Ethel Browne, Hans Spemann, And The Discovery Of The Organizer Phenomenon -- Len Ethel Browne, hans spemann, and the Discovery of the Organizer Phenomenon.HM Lenhoff Department of Developmental and Cell Biology, University of California http://www.biolbull.org/cgi/content/abstract/181/1/72

HOME HELP FEEDBACK SUBSCRIPTIONS ... TABLE OF CONTENTS QUICK SEARCH: [advanced] Author: Keyword(s): Year: Vol: Page: This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager PubMed Articles by Lenhoff, H. M. ARTICLES Ethel Browne, Hans Spemann, and the Discovery of the Organizer Phenomenon H. M. Lenhoff Department of Developmental and Cell Biology, University of California, Irvine, California 92717 Ethel Browne Harvey (1885-1965) will be familiar to some as a researcher on the embryology of sea urchins. Few, however, know her as Ethel Browne who, as a graduate student, published, in 1909, a remarkable paper demonstrating for the first time the induction by a transplant of a secondary axis of polarity in the host. This process was later named "organization" by Spemann and Mangold (1924) in a paper that led to Spemann's being awarded the Nobel Prize. Why did the Nobel Committee, or other embryologists for

44. Ethel Browne, Hans Spemann, And The Discovery Of The Organizer Phenomenon -- Len http://www.biolbull.org/cgi/reprint/181/1/72

Your browser does not support frames. Click here to view the unframed reprint.

45. FML - Biography Of Hans Spemann (1869-1941) hans spemann was born in Stuttgart on June 27th, 1869. hans spemann studiedembyogenesis on the newt embryo by transplantation and by cutting off the http://www2.fml.tuebingen.mpg.de/Spemann

@import url(http://www2.fml.tuebingen.mpg.de/ploneColumns.css); @import url(http://www2.fml.tuebingen.mpg.de/plone.css); @import url(http://www2.fml.tuebingen.mpg.de/ploneCustom.css); Skip to content Small Text Normal Text Large Text ... FML Sections Home Profile Groups Jobs ... Links Personal tools You are not logged in Log in You are here: Home Biography of Hans Spemann (1869-1941) Biography of Hans Spemann (1869-1941) Hans Spemann was born in Stuttgart on June 27th, 1869. 1904 Professor in W¼rzburg. 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. Created by raetsch Last modified

46. Biografia De Spemann, Hans Translate this page spemann, hans. (1869-1941) Zoólogo y embriólogo alemán, n. en Stuttgart y m.en Friburgo de Brisgovia. Estudió en la Universidad de Heidelberg y en el http://www.biografiasyvidas.com/biografia/s/spemann.htm

Inicio Buscador Las figuras clave de la historia Reportajes Los protagonistas de la actualidad Spemann, Hans (1869-1941) Zoólogo y embriólogo alemán, n. en Stuttgart y m. en Friburgo de Brisgovia. Estudió en la Universidad de Heidelberg y en el Instituto Zoológico de la Universidad de Wurzburgo. Profesor de zoología en la Universidad de Rostock (1908), director del Instituto de Biología Kaiser-Wilhelm de Berlín (1914) y, a partir de 1919, profesor de zoología en la Universidad de Friburgo, fue galardonado en 1935 con el premio Nobel de Fisiología y Medicina por su descubrimiento del factor organizador en el desarrollo embrionario. Escribió Zur Geschichte und Kritik des Begriffes der Homologie, Mikrochirurgische Operations-Technik y Zur Theorie der tierischen Entwicklung. Inicio Buscador Recomendar sitio

47. Der Nobelpreis Für Physiologie Oder Medizin: Hans Spemann Entwicklungsstadium . hans spemann *1869, † 1941. PAGERANK SEO. http://www.nobelpreis.org/medizin/spemann.htm

vor suchen Home Chemie ... Wirtschaft Hans Spemann (Deutschland) "Für die Entdeckung des Organisator-Effekts im embryonalen Entwicklungsstadium"

48. MSN Encarta - Spemann, Hans Translate this page spemann, hans (Stoccarda 1869 - Friburgo in Brisgovia 1941), embriologo tedesco . Altre risorse di Encarta. Cerca in Encarta spemann, hans http://it.encarta.msn.com/encyclopedia_761582641/Spemann_Hans.html

MSN Home My MSN Hotmail Shopping ... Migliora la tua esperienza con Encarta Cerca in Encarta Articolo riservato agli iscritti MSN Encarta Premium: Puoi consultare questo e altri 30.000 articoli, un atlante interattivo, un dizionario bilingue e altre risorse, effettuando l'iscrizione a MSN Encarta Premium per €29,95 all'anno. Per saperne di pi¹. L'articolo ¨ disponibile solo per gli utenti iscritti a MSN Encarta Premium. Gi  iscritto? Per accedere fare clic sul pulsante Accedi in alto a destra. Spemann, Hans Spemann, Hans (Stoccarda 1869 - Friburgo in Brisgovia 1941), embriologo tedesco. Cominci² gli studi di medicina all'Universit  di Heidelberg nel 1891.... Vuoi altri contenuti di Encarta? Iscriviti subito e avrai a tua disposizione: Pi¹ di 30.000 articoli Atlante dinamico Dizionario bilingue Approfondimenti Bibliografie Web Center Trova altre informazioni su Spemann, Hans Altre risorse di Encarta Cerca in Encarta Spemann, Hans © 2005 Microsoft Informativa sulla privacy di MSN Condizioni per l'utilizzo Pubblicit  Guida

49. Organizing The Embryo: The Central Nervous System In 1924, the German embryologists hans spemann and Hilde Mangold performed anexperiment that. demonstrated that the pattern of development of cells is http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/Spemann.html

Index to this page The Spemann Organizer A Tail Organizer Patterning the central nervous system in Drosophila Dorsal vs Ventral Nerve Cords ... We're halfway done! Organizing the Embryo: The Central Nervous System In the embryonic development of a zygote, gradients of mRNAs and proteins, deposited in the egg by the mother as she formed it, give rise to cells of diverse fates despite their identical genomes. For a discussion of the evidence that leads to this important conclusion, examine Embryonic Development: Getting Started But is the embryo fully patterned in the fertilized egg? It is difficult to imagine that the relatively simple gradients in the egg could account for all the complex migration and differentiation of cells during embryonic development. And, in fact, the answer is no. However, once these gradients have sent certain cells along a particular path of gene expression, the stage is set for those cells to begin influencing nearby cells to become increasingly diversified. In other words, cell-intrinsic signals (established between a nucleus and the particular cytoplasmic environment that cleavage has placed it in) lay the foundation for cell-cell interactions to further guide the cells of the embryo to assume their proper position in the embryo and to differentiate into their final specialized form and function.

50. S spemann, hans eggtying experiment in another context transplant experiment.Spermatogenesis S phase of cell cycle Sphenopsids http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/S.html

Go to Section A B C D ... Z S Saccharomyces cerevisiae (budding yeast) [diploid number] [genome] St. Johnswort Salmonella also [ genome Ames Test uptake by cells Saprophyte Heterotrophic plant (or fungus ) that secures its food by the extracellular digestion of nonliving organic matter. Sarcoma A cancer produced by a malignant cell of supporting tissue such as muscle, bone, or cartilage. Compare with carcinoma Sarcomere Sarcopterygians Scaphopoda ... Scatchard equation Schistosomiasis life cycle of parasite how it evades the immune system Schwann cell SCID (Severe combined immunodeficiency) SCID-X1 adenosine deaminase deficiency defective V(D)J recombination in mice ... Scientific papers Scion Detached part of a plant (e.g., a piece of stem) that is grafted onto another plant. Sclerenchyma SCR S -locus C ysteine- R ich protein) Scrapie Screwworm fly Scrub forest biome Scurvy ... Seeds Selection natural stabilizing, directional, disruptive sexual coefficient ( ... Selective serotonin reuptake inhibitors (SSRIs) Selector gene Gene that regulates the expression of many other genes. Selector genes encode transcription factors Examples Selenocysteine Self-incompatibility in plants ... Semicircular canals Sense strand antisense strand as a template.) [

51. Especiales Diario Médico Translate this page hans spemann nació en Wurgwurg (Alemania) en 1869. Enhttp//gays.xadulthosting.com/1914 hans spemann fue nombrado director adjuntodel Instituto de http://nobelfree.4t.com/nobel1935.html

Free Web Hosting Provider Web Hosting E-commerce High Speed Internet ... Photo Sharing if(window.ivnRotate) window.ivnRotate1 = new window.ivnRotate('ivnRotate1',0,document.awsSearch1.Keywords) Popular Searches: Hans Spemann Hans Spemann http://zoostories.bestialityhost.com/ sistema nervioso. http://gay.pornparks.com/mono/ http://mature.xadulthosting.com/ En http://gays.xadulthosting.com/ http://zed.maxspeed.com/ los anejos embrionarios especiales. http://now.dojoin.com/ numerosas publicaciones. http://sergo.capita.org/ http://jizz.hopto.org/ http://mask.etowns.org/ http://digits.flnet.org/ ... http://zfamily.servegame.com/ embrionarias, y observando que el desarrollo de los embriones continuaba con toda normalidad.

52. Hans Spemann Translate this page Lebenslauf von hans spemann. hans spemann Am 27. Juni 1869 wurde hans spemannals Sohn eines Verlegers in Stuttgart geboren. http://home.tiscalinet.ch/biografien/biografien/spemann.htm

Hans Spemann (1869-1941) Sowohl die entgegengesetzten philosophischen Standpunkte als auch die widersprechenden Deutungen der experimentellen Ergebnisse von Roux (Mosaikentwicklung) und Driesch Die Keimplasmatheorie von Weismann Weismann ausging. Weismann Rana esculenta Roux und Driesch Roux mit Amphibienkeimen arbeitend die Ungleichwertigkeit der ersten Furchungszellen festgestellt hatte, konnte Driesch deren Gleichwertigkeit (Aquipotenz) bei Seeigeln beobachten. Der Anstichversuch von Roux Und doch hat er ihn geschrieben.

53. Hans Spemann Translate this page Lebenslauf von hans spemann. von hans spemann, Freiburg i. Br. Deutsche Ausgabeder Stillman Lectures gehalten an der Yale University http://home.tiscalinet.ch/biografien/sources/spemann_schluss.htm

Sicher gibt es auch andere Wege des Fortschritts; aber dies ist der mir durch Begabung und Neigung gewiesene. von Hans Spemann, Freiburg i. Br. Deutsche Ausgabe der Stillman Lectures gehalten an der Yale University Berlin, Verlag von Julius Springer, 1936

54. Milestones Klonen Translate this page spemann, hans (1936) Experimentelle Beiträge zu einer Theorie der Entwicklungmit 217 Abb. spemann, hans (1938) Embryonic development and induction. http://www.ta-akademie.de/deutsch/aktuelles/klonen/milestones.asp?SID=2008007424

55. Bibliographic Essays: Life Sciences In The Twentieth Century A general perspective is given in hans spemann and the Organizer Concept, Experientia 1969, 2511211125. A more recent essay by Hamburger details the http://www.hssonline.org/teach_res/essays/allen/allenp2.html

Bibliographic Essays: Life Sciences in the Twentieth Century, by Garland E. Allen, Page 3 EXPERIMENTAL EMBRYOLOGY By the late nineteenth century various biologists began to seek ways of incorporating more experimental methods and causal explanation into what had been basically a descriptive science. This trend was initially most prominent in embryology (developmental biology, in today's terms), but it soon spread to other fields such as heredity, evolution, and, ultimately, ecology, and animal behavior. A useful collection of contemporary reviews papers discussing the state of embryological and morphological work in the 1890s comes from the Marine Biological Laboratory's famous Friday evening lecture series (1889-1899). Selected papers from this series have been reprinted with commentary by Jane Maienschein as Defining Biology: Lectures from the 1890s (Cambridge, Mass.: Harvard Univ. Press, 1986). This collection provides easy access to some authoritative but not overly technical primary source material that could easily be assigned to undergraduate students.

56. The Heritage Of Experimental Embryology: Hans Spemann And The Organizer The heritage of experimental embryology hans spemann and the organizer.Reviewed by Jonathan Slack. ICRF Developmental Biology Unit, Oxford. Full text http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1035894

57. Spelter - Definition Of Spelter By The Free Online Dictionary, Thesaurus And Enc spemann, hans spemann, hans SPEMCSCF SPEMS SPEN SPEN Spenard, Alaska Spence Spence School Spence, (James) Lewis Thomas Chalmers http://www.thefreedictionary.com/spelter

Domain='thefreedictionary.com' word='spelter' Your help is needed: American Red Cross The Salvation Army join mailing list webmaster tools Word (phrase): Word Starts with Ends with Definition subscription: Dictionary/ thesaurus Computing dictionary Medical dictionary Legal dictionary Financial dictionary Acronyms Columbia encyclopedia Wikipedia encyclopedia Hutchinson encyclopedia spelter 0.01 sec. Page tools Printer friendly Cite / link Email Feedback spel·ter (sp l t r) n. Zinc, especially in the form of ingots, slabs, or plates. Probably of Dutch or Low German origin Mentioned in References in classic literature No references found Deane, attached to a firm of which the returns were on the increase, naturally took a more lively view of the present, and had some details to give concerning the state of the imports, especially in hides and spelter , which soothed Mr. The Mill on the Floss by Eliot, George View in context More results Dictionary/thesaurus browser Full browser spelling checker spelling contest Spelling match spelling pronunciation ... spelt spelter Spelunc spelunk spelunker Spemann ... Spellman, Francis (Joseph)

58. Spellwork - Definition Of Spellwork By The Free Online Dictionary, Thesaurus And spelter Spelunc spelunk spelunker spelunker Spelunkers Spelunking SPEM spemann spemann spemann, hans spemann, hans SPEMCSCF http://www.thefreedictionary.com/Spellwork

Domain='thefreedictionary.com' word='Spellwork' Your help is needed: American Red Cross The Salvation Army join mailing list webmaster tools Word (phrase): Word Starts with Ends with Definition subscription: Dictionary/ thesaurus Computing dictionary Medical dictionary Legal dictionary Financial dictionary Acronyms Columbia encyclopedia Wikipedia encyclopedia Hutchinson encyclopedia Spellwork 0.04 sec. Page tools Printer friendly Cite / link Email Feedback n. Power or effect of magic; that which is wrought by magic; enchantment. Like those Peri isles of light That hang by spellwork in the air. - Moore. Mentioned in References in classic literature No references found No references found Dictionary/thesaurus browser Full browser spelling bee Spelling book spelling checker spelling contest ... Spellken Spellwork spelt spelter Spelunc spelunk ... Spells of Dungeons and Dragons Spellwork Spelman Spelman Spelman College Spelman College ... Spelunkers Word (phrase): Word Starts with Ends with Definition Free Tools: For surfers: Browser extension Word of the Day NEW!

59. People Files Marcello / Skowronski, Jacek / Sloan, MJ / Smart, John / Smith, Guinevere /So, Margaret / Solnick, David / Spector, David / spemann, hans / Spencer, http://library.cshl.edu/archives/archives/people.htm

Carnegie Building - 1905 CSHL PEOPLE FILES Cold Spring Harbor Laboratory Archives A B C D ... Z Balbinder, E. / Balch, Francis / Baltimore, David / Banta, A.M. / Bar-Sagi, Dafna / Barford, David / Barrows, F.L. / Bates, Robert / Bateson, William / Baum, Peter / Beach, David / Beckwith, David / Belling, John / Benedict, William / Bentvelzen, P. / Benzer, Seymour / Berg, John W. / Berg, Paul / Bergner, A. Dorothy / Bernardi, G. / Bigelis, Ramunus / Blackford, Eugene G. / Blakeslee, A.F. 5.1 / Blatch, Harriet / Blose, Sephen / Bodmer, Walter / Boivin, Andre / Bolger, Graeme / Bonnevie, Kristine / Botchan, Michael / Botstein, David / Boveri, Theodore / Boyer, Herbert / Bradbury, M. / Bragg, Sir Lawrence / Braun, Werner / Brenner, Sidney / Bridges, Calvin 5.2 / Brings, Art / Broach, James / Broker, Thomas / Brown, Donald / Browne, G. Morgan / Bruenn, Jeremy / Bryson, Verson / Bukhari, Ahmad / Burridge, Keith / Bush, Vannevar / Buzzati-Traverso, A. Falcoz-Kelly, Francoise / Fano, Ugo / Fassano, O. / Federley, H. / Feilotter, Harriet / Feramisco, J. / Fey, George / Fiddes, John / Field, Marshall III / Finch, John / Fink, Gerald / Fisher, Agnes / Fisher, R.A. / Fitzpatrick, William / Flint, Jane / Ford, Nancy / Fox, Donald / Franklin, Rosalind / Franza, Bob / Frassetto, F. / Frets, G.P. / Fricke, Hugo / Frisque, Richard / Futcher, Bruce / Furth, Jacob Gall, J. / Gallimore, Phil / Gallo, Robert C. / Galloway, Denise / Galston, Clarence / Garrels, James / Garrod, Archibald / Gates, R. Ruggles / Gehring, W.J. / Gelanis, Richard / Genovese, William / Gensel, Susan (Cooper) / Gerard, Robert / Gesteland, R.F. / Gething, Mary Jane / Ghigi, A. / Giese, Karle Peter / Gilbert, Walter / Gilman, Mike / Gingeras, Thomas / Glass, Bentley / Gluzman, Yakov / Goldfarb, Mitch / Goldman, Robert / Goldschmidt, R.B. / Goodrich, Julia / Gorini, Luigi (photos from "Gene Function in Prokaryotes" 1983) / Grace Mr. & Mrs. (Oliver) / Greenaway, P. / Greider, Carol / Grodzicker, Terri / Gros, Francois / Grotewold, Erich / Gunnery, Shobha

60. Lexikon Hans Spemann hans spemann aus der freien EnzyklopädieWikipedia und steht unter der GNU Lizenz. Die Liste der Autoren ist unter http://lexikon.freenet.de/Hans_Spemann

E-Mail Mitglieder Community Suche ... Hilfe document.write(''); im Web in freenet.de in Shopping Branchen Lexikon Artikel nach Themen alphabetischer Index Artikel in Kategorien Weitere Themen Wer wird Kanzler? In den Wettb¼ros liegt Angie ganz weit vorn Sexy am Strand: S¼Ÿe Rihanna rockt im heiŸen Sand IAA-Neuheit: Sport- liches Fun-Car mit Erdgasantrieb RAZR-Serie: die ultraflachen Handys von Motorola ... 60-Stundenwoche: Allheilmittel gegen Arbeitslosigkeit? Sie sind hier: Startseite Lexikon Hans Spemann Hans Spemann Hans Spemann 27. Juni in Stuttgart 9. September in Freiburg im Breisgau ) war ein deutscher Biologe Spemann f¼hrte 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 k¼nstlich Zwillinge erzeugte. Durch dieses Experiment und weitere Versuche an mehrzelligen Embryonalstadien wurde nachgewiesen, dass die Furchungszellen eines Embryos auf fr¼hen Entwicklungsstadien noch s¤mtliche f¼r die weitere Entwicklung notwendige Erbinformationen beinhalten.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Page 3     41-60 of 98    Back | 1  | 2  | 3  | 4  | 5  | Next 20