61. Dictionary Page CO.UK - Scientists Spallanzani, Lazaro spemann, hans Strausburger, Eduard A. Swammerdam, Jan http://scientists.d.dictonarypage.co.uk/

Scientists Aristotle Averroes, Ibn Roshd Bacon, Francis Scientists Aristotle Averroes, Ibn Roshd Bacon, Francis ... Wolff, Kaspar F.

62. Neuroscience Newsletter Wilhelm Roux, hans Driesch, Ross Harrison and hans spemann, he subsequentlymoved to the University of Frieburg to work with hans spemann. http://web.sfn.org/NL/2000/May-June/articles/pioneer.html

PIONEER OF A NEW ERA Viktor Hamburger and the Emergence of Experimental Embryology and Neuroembryology Dr. Hamburger's pioneering work in experimental embryology and neuroembryology is the subject of a special symposium during the Society's 30th Annual Meeting in New Orleans. For more information on this and other Annual Meeting symposia and lectures, watch for the Preliminary Program, which will mail to all members in early July. A video-taped archival interview with Dr. Hamburger is part of the Society's "History of Neuroscience in AutobiographyÓ series, featuring senior neuroscientists who have played an integral role in shaping modern neuroscience. For more information on the video series and companion books, visit our Web site at www.sfn.org By Ronald W. Oppenheim, Ph.D. Wake Forest University School of Medicine On July 9 of this year, Viktor Hamburger, one of the giants of modern embryology and neuroscience, will celebrate his 100th birthday. Although it is difficult to pinpoint a specific date as marking the beginning of a discipline, the period spanning the turn of the 20th century (~ 1890-1910) is often considered to be the birth date of both experimental embryology and neuroembryology. Accordingly, 1900 can be reasonably considered as marking the beginning of these fields, thereby making the year 2000 the centenary of both Viktor Hamburger and the disciplines with which he is so closely associated.

63. Chapter 12: Differentiation | Heredity And Development, Second Edition | John A. spemann, hans. 1938. Embryonic Development and Induction. New Haven Yale UniversityPress. Republished by Hafner, New York. TRINKAUS, JP 1969. http://scienceclassics.nas.edu/moore/chap12.html

Heredity and Development, SECOND EDITION JOHN A. MOORE PROFESSOR OF BIOLOGY UNIVERSITY OF CALIFORNIA, RIVERSIDE Text displayed electronically by permission of the Moore Family Trust A, Betty C. Moore, Trustee. Previous Table of Contents Next Differentiation The Problem of Differentiation. PREFORMATION AND EPIGENESIS We can begin our study of embryological concepts at the close of this long and sterile period. Much of the speculation of the seventeenth and eighteenth centuries concerned two rival concepts of development, preformation and epigenesis. Preformation, as the term implies, means that all the parts of the adult, including the most minute ones, are already perfectly formed at the very beginning of development. Epigenesis means that the adult parts are not present at the beginning, but are developed during embryonic life. Preformation. Homunculus in human sperm (from Hartsoeker, Essai de dioptrique, Paris, 1694, p. 230). The spermatists reported tiny animals in sperm. shows what one observer thought he would find if he could see the inner detail of the human sperm. Many others claimed to confirm him, not only on human sperm but on animal sperm as well. There is no problem of differentiation for the preformationists: the adult structures are already differentiated at the beginning of embryonic life; development consists only of growth.

64. Encyclopedia: Hans Spemann Web page about hans spemann (http//bio.p9.org.uk/). Categories 1869 births 1941 deaths Nobel Prize in Physiology or Medicine winners http://www.nationmaster.com/encyclopedia/Hans-Spemann

Supporter Benefits Signup Login Sources ... Pies Related Articles People who viewed "Hans Spemann" also viewed: Robert Barany Nobel Prize for Physiology or Medicine Paul Lauterbur Peter Mansfield ... Nobel Prize in physiology or medicine What's new? Our next offering Latest newsletter Student area Lesson plans Recent Updates Image:Bar_headed.goose.arp.750pix.jpg Image:Bar_headed.goose.750pix.jpg Ilford Il Capitano ... More Recent Articles Top Graphs Richest Most Murderous Most Taxed Most Populous ... More Stats Encyclopedia: Hans Spemann Updated 217 days 11 hours 17 minutes ago. Other descriptions of Hans Spemann Hans Spemann June 27 September 12 ) 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 link Web page about Hans Spemann http://bio.p9.org.uk/ Categories 1869 births 1941 deaths Nobel Prize in Physiology or Medicine winners Click for other authoritative sources for this topic (summarised at Factbites.com)

65. Hans Spemann Translate this page Begrifferklärung hans spemann. Dieser Artikel basiert auf dem Artikel hansspemann (http//de.wikipedia.org/wiki/hans_spemann) aus der freien http://www.netzwelt.de/lexikon/Hans_Spemann.html

Themen Ratgeber Shopping Forum ... PDA Sie sind hier: Home Lexikon Hans Spemann 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 den gemeinsam mit Hilde Mangold entdeckten Organisator-Effekt während der Embryonalentwicklung den Nobelpreis für Medizin . Er hatte durch Transplantations -Experimente 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.

66. American Zoologist: Homology In Development And The Development Of The Homology hans spemann and the causalanalytical conception of homology. By his own admissionhans spemann was not a friend of theoretical speculation. http://www.findarticles.com/p/articles/mi_qa3746/is_200011/ai_n8912858

@import url(/css/us/style1.css); @import url(/css/us/searchResult1.css); @import url(/css/us/articles.css); @import url(/css/us/artHome1.css); Advanced Search Home Help IN free articles only all articles this publication Automotive Sports 10,000,000 articles - not found on any other search engine. FindArticles American Zoologist Nov 2000 Content provided in partnership with 10,000,000 articles Not found on any other search engine. Featured Titles for ASA News ASEE Prism Academe African American Review ... View all titles in this topic Hot New Articles by Topic Automotive Sports Top Articles Ever by Topic Automotive Sports Homology in development and the development of the homology concept American Zoologist Nov 2000 by Laubichler, Manfred D Save a personal copy of this article and quickly find it again with Furl.net. It's free! Save it. Homology in Development and the Development of the Homology Concept1 SYNOPSIS. Homology is a central concept for Developmental Evolution. Here I argue that homology should be explained within the reference processes of development and evolution; development because it is the proximate cause of morphological characters and evolution because it deals with organic transformations and stability. This was already recognized by Hans Spemann in 1915. In a seminal essay "A history and critique of the homology concept" Spemann analyzed the history and present problems of the homology concept. Here I will continue Spemann's project and analyze some of the 20th century contributions to homology. I will end with a few reflections about the connections between developmental processes and homology and conclude that developmental processes are inherent in (i) the assessment of homology, (ii) the explanation of homology, (iii) the origin of evolutionary innovations (incipient homologues), and (iv) can be considered homologous themselves.

67. A Baby's Hair hans spemann was in a foul mood as he rearranged his blankets. Some of thefirst microsurgery tools created by hans spemann and Hilde Pröscholdt. http://www.scienceforpeople.com/Essays/baby_hair.htm

From Jones and Bartlett, a book on Stem Cells from Dr. Ann A. Kiessling and Scott C. Anderson: Human Embryonic Stem Cells: An Introduction to the Science and Therapeutic Potential Selected Articles: Creation of male/female embryos shows need for federal oversight Chicago Tribune July 13, 2003 Why use male cells in female embryos? This is just simple (if naive) practicality: Y chromosomes can be distinguished with a quick and inexpensive test. If the implanted cells became incorporated into the embryo, they would be easy to spot. So [Norbert Gleicher]'s team placed up to three male cells into female embryos that were 21 days old. Of Pharmers and Chimeras Spiked Online August 6, 2002 The green fields that ostentatiously carpet the hills of Scotland are home to the drug factories of the Roslin Institute. These factories produce only a modest amount of gas, and nobody in the neighborhood is complaining. After all, these 'factories' are sheep, genetically engineered to produce human proteins in their milk. The Big Chill Tech Central Station August 5, 2002

68. Developmental Biology Online: Embryos And Individuality This was precisely the question that brought hans spemann and others into The Heritage of Experimental Embryology hans spemann and the Organizer. http://www.devbio.com/article.php?ch=10&id=96

69. Developmental Biology Online: A Selective History Of Induction II That same year, hans spemann (3) published one of the most significant and The Heritage of Experimental Embryology hans spemann and the Organizer. http://www.devbio.com/article.php?ch=10&id=114

70. Especiales Diario Médico Translate this page En 1914 hans spemann fue nombrado director adjunto del Instituto de Biología hans spemann recibió el Premio Nobel con 66 años, mientras se encontraba en http://www.diariomedico.com/medicinasiglo/nobel1935.html

Mapa Web Contacto Publicidad Servicios Internet Sanitario Archivo Asesor Legal Congresos Deportes Dossieres Especiales DM Foros Imprescindibles DM Impuestos Informes Web Medline Multimedia Newsletters Ocio en DM Ofertas de trabajo Ondasalud.com Tienda de libros Especialidades Aparato Digestivo Enfermedades raras Ginec./Obstet. Infecciosas/Sida Med. Deportiva Med. Familiar Medicina Intensiva Med. Interna Medicina Legal Med. Nuclear Med. Preventiva Med. Trabajo Med. Urgencias Otorrinolaring. Trasplantes Form. continuada Telemedicina Secciones Sanidad Normativa Medicina Gestion Entorno Inicio Comentarios y sugerencias dminternet@recoletos.es Portada Hans Spemann Hans Spemann © Recoletos Medios Digitales S.L. Aviso Legal

71. Should Be Viewed At 800x600 Resolution This Page Is For Genreal hans spemann was born on June 27, 1869, in Stuttgart Germany. spemann s name willalways be associated with the work he did on experimental embryology. http://www.angelfire.com/on/HansSpemann1869/

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72. 20th Century Year By Year 1935 spemann, hans, Germany, University of Freiburg im Breisgau, b. 1869, d. 1941 forhis discovery of the organizer effect in embryonic development . Physics http://www.historycentral.com/20th/1935.html

Major Event/ Sports Nobel Prizes Pulitzer Prizes ... Pan Am Begins Service To Manila Sports Stanley Cup: Montreal Maroons vs. Toronto Maple Leafs Series: 3-0 US Open Golf: Sam Parks, Jr. Score: 299 Course: Oakmont CC Location: Oakmont, PA World Series: Detroit Tigers vs. Chicago Cubs Series: 4-2 Nobel Prizes Chemistry The prize was awarded jointly to: JOLIOT, FRƒDƒRIC, France, Institut du Radium, Paris, b. 1900, d. 1958; and his wife JOLIOT-CURIE, IRéNE, France, Institut du Radium, Paris, b. 1897, d. 1956: "in recognition of their synthesis of new radioactive elements" Literature The prize money was with 1/3 allocated to the Main Fund and with 2/3 to the Special Fund of this prize section. Peace Physiology or Medicine SPEMANN, HANS, Germany, University of Freiburg im Breisgau, b. 1869, d. 1941: "for his discovery of the organizer effect in embryonic development" Physics CHADWICK, Sir JAMES, Great Britain, Liverpool University, b. 1891, d. 1974: "for the discovery of the neutron" Pulitzer Prizes Drama: Zoe Akins ... "The Old Maids"

73. Early Amphibian Development hans spemann Hilde Mangold 1924. • spemann called the dorsal lip theirderivatives (notochord, prechordal mesoderm (become head mesoderm)) - organizer http://faculty.ncwc.edu/ddaley/B308.Amphib.develo.axis.htm

Early Amphibian Development Axis Formation Determination of Amphibian Axes Arise progressively through a sequence of interactions between neighboring cells This is regulative development Where a isolated blastomere has a potency greater than its normal embryonic fate called inductions Such inductive interactions are responsible for amphibian axis determination Early Experiments of Spemann Demonstrated early nuclear equivalence in newt cleavage (1903) Once in awhile a nucleus would cross the the constriction into the non-nucleated side Cleavage would then also began on this side Tighten the lasso - separate the two halves - twin larvae develop, one a little older than the other Early Experiments of Spemann Second experiment - constriction this time was perpendicular to the original, but still longitudinal This time he left a region directly opposite to the sperm entry point, the gray crescent on one side The earlier experiment cut right through the gray crescent Gray Crescent This exposes a region of the egg that was covered by dark cortical cytoplasm of the animal hemisphere The underlying cytoplasm has only diffuse pigment granules and appears gray - called the gray crescent Reorganization of Cytoplasm after Fertilization Early Experiments of Spemann 2nd Experiment Thus something in the gray crescent was necessary for normal development Asymmetry in the Amphibian Egg Early Experiments of Spemann How does the gray crescent region function in normal development Answer from fate maps of the egg - gray crescent cells initiate gastrulation

74. Cloning 7 “spemann, hans,” Dictionary of Scientific Biography , Vol. 12, p. 568a. 8 ThinkQuest, “History of Cloning;” See also Michael Specter with Gina Kolata, http://www.geocities.com/skews_me/cloning.html

75. Freiburger, Überregionale & Internationale Preise - Zentrale Verwaltung Der Uni Translate this page hans spemann? hans spemann (1869 bis 1941), Biologe. Wirkte als Ordinarius ander Albert-Ludwigs-Universität von 1919 bis zu seiner Emeritierung 1935. http://www.zuv.uni-freiburg.de/zuv/preise/preise_db.php?action=show&id=20

76. Índice Alfabético De Los Premios Nobel De Fisiología O Medicina (1901-1998) spemann, hans (1935) SPERRY, Roger Wolcott (1981) SUTHERLAND, Earl Wilbur (1971)SZENTGYÖRGYI, Albert (1937) TATUM, Edward Lawrie (1958) http://www.bvs.sld.cu/revistas/his/vol_2_99/his12299.htm

Indice Anterior Siguiente Formato .PDF ADRIAN, Edgar Douglas (1932) ARBER, Werner (1978) AXELROD, Julius (1970) BALTIMORE, David (1975) BANTING, Frederick Grant (1923) BEADLE, Georges Wells (1958) BEHRING, Emil Adolf von (1901) BENACERRAF, Baruj (1980) BISHOP, Michael John (1989) BLACK, James Whyte (1988) BLOCH, Konrad Emil (1964) BLUMBERG, Baruch Samuel (1976) BORDET, Jules Jean Baptiste Vicent (1919) BOVET, Daniel (1957) BROWN, Michael Stuart (1985) BURNET, Frank Macfarlane (1960) CARREL, Alexis (1912) CHAIN, Ernest Boris (1945) CLAUDE, Albert (1974) COHEN, Stanley (1986) CORI, Carl Ferdinand (1947) CORI, Gerty Theresa Radnitz (1947) CORMACK, Allan MacLeod (1979) CRICK, Francis Harry Compton (1962) DALE, Henry Hallet (1936) DAM, Henrik Carl Peter (1943) DAUSSET, Jean (1980) DOHERTY, Peter C. (1996) DOISY, Edward Adelbert (1943) DOMAGK, Gerhard (1939) DULBECCO, Renato (1975) ECCLES, John Carew (1963) EDELMAN, Gerald Maurice (1972) EHRLICH, Paul (1908) EIJKMAN, Christiaan (1929) EINTHOVEN, Willem (1924) ELION, Gertrude Belle (1988) ENDERS, John Franklin (1954)

77. Hans Spemann Winner Of The 1935 Nobel Prize In Medicine Translate this page hans spemann nacio el 27 de junio de 1869, en Stuttgart. El era el hijo mayordel editor, Wilhelm spemann. De 1878 a 1888 el fue a la Escuela http://deraser.bravehost.com/hans_spemann1935.htm

setInterval("window.status='All what you need - bookmark us !(Ctrl+D)'",5); Hans Spemann - Biografia Hans Spemann nacio el 27 de junio de 1869, en Stuttgart. El era el hijo mayor del editor, Wilhelm Spemann. De 1878 a 1888 el fue a la Escuela Eberhard-Ludwig en Stuttgart y cuando el abandono la escuela en 1888 el gasto un ano en la empresa editora de su padre. De 1889-1890 el hizo su servicio militar y luego, despues de un periodo como un librero de venta al publico, el entro, en 1891, la Universidad de Heidelberg. Alli, hasta que el tomara su examen preliminar en 1893, el estudio la medicina, y fue sobre todo atraido por el trabajo del anatomista relativo alli, Carl Gegenbaur. Durante el invierno de 1893-1894 el estudio en la Universidad de Munich, donde el se hizo mas estrechamente informado con agosto Pauly - un hecho muy importante a el. De la primavera 1894 al final de 1908, el trabajo en el Instituto Zoologico en la Universidad de Wurzburg. En 1895 el tomo su grado en zoologia, botanica, y fisica (sujetos de servir sus estudios anatomicos), habiendo trabajado bajo Theodor Boveri, Julius Sachs, y Wilhelm R o ntgen, todo de los que tenia la influencia mayor sobre su desarrollo cientifico. En 1898 el se licencio como un conferenciante en la zoologia en la Universidad de Wurzburg, y en 1908 le pidieron hacerse el Profesor de Zoologia y Anatomia Relativa en Rostock, y en 1914 el se hizo el Director Asociado del Kaiser Wilhelm el Instituto de la Biologia en el Berlin-Dahlem. En 1919 el fue designado al Profesor de la Zoologia en la Universidad de Freiburg-im-Breisgau, en la sucesion a Hans Doflein, un poste que el sostuvo hasta que el se retirara y se hiciera el Profesor Emerito en 1935.

78. 04.01.01: A Clone Of Your Own: The Legal Issues And The Future Of Genetic Engine 1902 the German Embryologist hans spemann used a strand of human hair to tie 1938 hans spemann proposes a “fantastical experiment” to transfer one http://www.yale.edu/ynhti/curriculum/units/2004/1/04.01.01.x.html

Yale-New Haven Teachers Institute Home A Clone of Your Own: The Legal Issues and the Future of Genetic Engineering on Humans by Joanna Maria Ali Contents of Curriculum Unit 04.01.01: Narrative The Possible Reasons for Human Cloning Why Should We Care About Cloning? Medical Dangers of Human Cloning ... To Guide Entry This unit is intended for a senior honors or Advanced Placement Biology class and will require about two to four weeks to complete depending on the students’ aptitude and prior knowledge. The New Haven Public Schools Science Curriculum demonstrates a commitment to the discussion of current science events among its teachers and students. The questioning of modern biological techniques and the discussion of its social and moral implications is a vital part of a science curriculum; this includes any legal issues that may arise. The bullets to be covered in the unit stem from the Connecticut Common Core of Teaching and Learning and were adapted by The New Haven Public School science curriculum committee; they include: 1. Prepare and defend a position on the ethics of genetic engineering

79. Nat' Academies Press, The Language Of Life (2005) spemann, hans, 8687, 104, 105, 106, 108. spinal cord, 117, 134, 194. src gene,70, 153. Src protein, 70-71. St. Mary’s Hospital (Middletown, PA), 175 http://www.nap.edu/openbook/0309089891/html/327.html

Read more than 3,000 books online FREE! More than 900 PDFs now available for sale HOME ABOUT NAP CONTACT NAP HELP ... ORDERING INFO Items in cart [0] TRY OUR SPECIAL DISCOVERY ENGINE Questions? Call 888-624-8373 The Language of Life (2005) Joseph Henry Press ( JHP Find More Like This Book Research ... Dashboard NEW! BUY This Book CHAPTER SELECTOR: Openbook Linked Table of Contents Front Matter, pp. i-vi Introduction, pp. 1-8 1 Small Talk, pp. 9-40 2 Build It and They Will Talk, pp. 41-80 3 Plaiting the Net, pp. 81-138 4 Life in the Balance, pp. 139-184 5 "The Scenario-Buffered Building", pp. 185-240 6 The Viirtual Cell, pp. 241-260 Notes, pp. 261-304 Acknowledgements, pp. 305-306 Index, pp. 307-330 GO TO PAGE: TABLE OF CONTENTS PAGE PRINTABLE PDF PAGE CHAPTER PAGE SEARCH THIS BOOK: The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. mathematical modeling, in memory and learning

80. Active Skim View Of: Index 68 Song vocalization, 68–70 Sound localization in owls, 73–77, 165 Sparrows,whitecrowned, 66–67, 69 spemann, hans, 15 Sperry, Roger, 25–26 Stem cells, http://www.nap.edu/nap-cgi/skimit.cgi?isbn=030909223X&chap=179-190

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