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Here is a critical account of the experimental work of German biologist and Nobel laureate Hans Spemann, one of the founders of experimental embryology.The author, a distinguished developmental biologist, spent almost a decade in Spemann's laboratory.He examines Spemann's work and traces the different lines of investigation which emerged from his mentor's seminal research, and laid the foundation for modern cellular and developmental biology. ... Read more

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This digital document, covering the life and work of Hans Spemann, is an entry from Contemporary Authors, a reference volume published by Thompson Gale. The length of the entry is 1212 words. The page length listed above is based on a typical 300-word page. Although the exact content of each entry from this volume can vary, typical entries include the following information:

• Place and date of birth and death (if deceased)
• Family members
• Education
• Professional associations and honors
• Employment
• Writings, including books and periodicals
• A description of the author's work
• References to further readings about the author

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This digital document is an article from Contenido, published by Thomson Gale on March 1, 2006. The length of the article is 777 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Hans Spemann, el olvidado "padre" de la clonación: realizó sus primeros experimentos hace más de un siglo, y las técnicas que discurrió probaron ser tan acertadas que aún ahora las emplean en laboratorios de todo el mundo.(Biografía)
Author: Juan José Morales
Publication: Contenido (Magazine/Journal)
Date: March 1, 2006
Publisher: Thomson Gale
Issue: 513Page: 76(3)

Article Type: Biografía

Distributed by Thomson Gale ... Read more

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Kapitel: Christiane Nüsslein-Volhard, August Weismann, Hans Mohr, Wolfgang Driever, Hans Spemann, Anne Mclaren, Peter Gruss, Irving L. Weissman, Herbert Jäckle, Hans Driesch, Stuart Kauffman, Richard Von Hertwig, Otto Mangold, Hans Querner, Ludolph Christian Treviranus, Klaus Sander, Martin Chalfie, Frank Jülicher, Viktor Hamburger, H. Robert Horvitz, Conrad Hal Waddington, Brian Goodwin, Hermann Henking, Walter Gehring, Edward B. Lewis, Heinz Tiedemann, Hilde Mangold, Hans Meinhardt, Eric F. Wieschaus, Ulrike Gaul, Ernst Hafen, Lewis Wolpert, Christof Niehrs, Paul Alfred Weiss, Lennart Olsson. Aus Wikipedia. Nicht dargestellt. Auszug: Christiane Nüsslein-Volhard (born October 20, 1942 in Magdeburg) is a German biologist who won the Albert Lasker Award for Basic Medical Research in 1991 and the Nobel Prize in Physiology or Medicine in 1995, together with Eric Wieschaus and Edward B. Lewis, for their research on the genetic control of embryonic development. The experiments that earned Nüsslein-Volhard and Wieschaus their Nobel prize aimed to identify genes involved in the development of Drosophila melanogaster (fruit fly) embryos. At this point (the late 1970s and early 1980s) little was known about the genetic and molecular mechanisms by which multicellular organisms develop from single cells to morphologically complex forms during embryogenesis. Fruit flies have long been an important model organism in genetics due to their small size and quick generation time, which makes even large numbers of them relatively easy to maintain and observe in the laboratory. Nüsslein-Volhard and Weischaus identified genes involved in embryonic development by a series of genetic screens. They generated random mutations in fruit flies using a chemical. Some of these mutations affected genes involved in the development of the embryo. Nüsslein-Volhard and Weischaus took advantage of the segmented form of Drosophila larvae to address the logic of th...http://booksllc.net/?l=de ... Read more

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Die Entdeckung des aufsehenerregenden Organisatoreffektes bei Amphibien durch den Freiburger Hans SPEMANN (1869 - 1941) und seiner Studentin Hilde MANGOLD (geb. Pröscholdt, 1898 - 1924) stellt den bedeutsamsten Meilenstein in der Entwicklungsbiologie des 20. Jahrhunderts dar. Für SPEMANN war es die Krönung seiner langjährigen Forschungen. Im Jahre 1935 erhielt er hierfür den Nobelpreis für Medizin und Physiologie zugesprochen - als zweiter Biologe nach dem amerikanischen Genetiker Hunt Morgan. Mit der vorliegenden Biographie werden erstmals Lebensweg und wissenschaftlicher Werdegang Hans SPEMANNs auf breiter Quellenbasis skizziert. Umfangreiche Tagebuchnotizen und zahlreiche Briefwechsel mit berühmten Kollegen gewähren dem Leser ebenso neue wie lebendige Informationen über Hans SPEMANN. ... Read more

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This digital document is an article from Science and Its Times, brought to you by Gale®, a part of Cengage Learning, a world leader in e-research and educational publishing for libraries, schools and businesses.The length of the article is 1542 words.The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase.You can view it with any web browser.The histories of science, technology, and mathematics merge with the study of humanities and social science in this interdisciplinary reference work. Essays on people, theories, discoveries, and concepts are combined with overviews, bibliographies of primary documents, and chronological elements to offer students a fascinating way to understand the impact of science on the course of human history and how science affects everyday life. Entries represent people and developments throughout the world, from about 2000 B.C. through the end of the twentieth century. ... Read more

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This digital document is a journal article from Studies in History and Philosophy of Biol & Biomed Sci, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

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The term 'mechanism' has been used in two quite different ways in the history of biology. Operative, or explanatory mechanism refers to the step-by-step description or explanation of how components in a system interact to yield a particular outcome (as in the 'mechanism of enzyme action' or the 'mechanism of synaptic transmission'). Philosophical Mechanism, on the other hand, refers to a broad view of organisms as material entities, functioning in ways similar to machines-that is, carrying out a variety of activities based on known chemical and physical processes. In the early twentieth century philosophical Mechanism became the foundation of a 'new biology' that sought to establish the life sciences on the same solid and rigorous foundation as the physical sciences, including a strong emphasis on experimentation. In the context of the times this campaign was particularly aimed at combating the reintroduction of more holistic, non-mechanical approaches into the life sciences (organicism, vitalism). In so doing, Mechanists failed to see some of the strong points of non-vitalistic holistic thinking. The two approaches are illustrated in the work of Jacques Loeb and Hans Spemann. ... Read more