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A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada
- Scott F. Lamoureux, Robert Gilbert
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- Journal:
- Quaternary Research / Volume 61 / Issue 2 / March 2004
- Published online by Cambridge University Press:
- 20 January 2017, pp. 134-147
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The varve record from High Arctic, proglacial Bear Lake reveals a regionally coherent hydroclimatic signal as well as complexities due to changing hydroclimatic and limnologic conditions. Varve formation is strongly dependent on underflows that exhibit variability in strength during the past 750 yr. Periods with reduced underflow sedimentation and accumulation rates fail to produce varves in the distal part of the lake. Isolated coarse silt and sand grains occur in 80% of the varves and are interpreted to be niveo-aeolian in origin. Coarse (>500 μm) sand grains deposited on the lake ice by strong winter winds are notably less common since A.D. 1850, likely due to reduced storminess. Regression of the varve thickness record with meteorological records indicates high correlations with autumn (September and October) temperatures and total monthly snowfall. These correlations are best at times when underflow activity is sufficiently strong to produce varves throughout the lake. The close association with warmer temperatures and snow-bearing synoptic systems moving north in Baffin Bay suggests that the primary climate signal in the varves is varying autumn snow pack that controls nival discharge in the following year. The similarity between the other records of melt season temperature and sea-ice cover and the Bear Lake record suggests that summer and autumn conditions were generally similar across the Baffin Bay region through much of the last millennium.
T. J. Horder, J. A. Witkowski, and C. C. Wylie (editors), A history of embryology (British Society for Developmental Biology, symposium 8), Cambridge University Press, 1986, 8vo, pp. xxiv, 477, illus., £60.00.
- Scott F. Gilbert
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- Journal:
- Medical History / Volume 31 / Issue 2 / April 1987
- Published online by Cambridge University Press:
- 16 August 2012, pp. 226-227
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Contributors
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- By Rose Teteki Abbey, K. C. Abraham, David Tuesday Adamo, LeRoy H. Aden, Efrain Agosto, Victor Aguilan, Gillian T. W. Ahlgren, Charanjit Kaur AjitSingh, Dorothy B E A Akoto, Giuseppe Alberigo, Daniel E. Albrecht, Ruth Albrecht, Daniel O. Aleshire, Urs Altermatt, Anand Amaladass, Michael Amaladoss, James N. Amanze, Lesley G. Anderson, Thomas C. Anderson, Victor Anderson, Hope S. Antone, María Pilar Aquino, Paula Arai, Victorio Araya Guillén, S. Wesley Ariarajah, Ellen T. Armour, Brett Gregory Armstrong, Atsuhiro Asano, Naim Stifan Ateek, Mahmoud Ayoub, John Alembillah Azumah, Mercedes L. García Bachmann, Irena Backus, J. Wayne Baker, Mieke Bal, Lewis V. Baldwin, William Barbieri, António Barbosa da Silva, David Basinger, Bolaji Olukemi Bateye, Oswald Bayer, Daniel H. Bays, Rosalie Beck, Nancy Elizabeth Bedford, Guy-Thomas Bedouelle, Chorbishop Seely Beggiani, Wolfgang Behringer, Christopher M. Bellitto, Byard Bennett, Harold V. Bennett, Teresa Berger, Miguel A. Bernad, Henley Bernard, Alan E. Bernstein, Jon L. Berquist, Johannes Beutler, Ana María Bidegain, Matthew P. Binkewicz, Jennifer Bird, Joseph Blenkinsopp, Dmytro Bondarenko, Paulo Bonfatti, Riet en Pim Bons-Storm, Jessica A. Boon, Marcus J. Borg, Mark Bosco, Peter C. Bouteneff, François Bovon, William D. Bowman, Paul S. Boyer, David Brakke, Richard E. Brantley, Marcus Braybrooke, Ian Breward, Ênio José da Costa Brito, Jewel Spears Brooker, Johannes Brosseder, Nicholas Canfield Read Brown, Robert F. Brown, Pamela K. Brubaker, Walter Brueggemann, Bishop Colin O. Buchanan, Stanley M. Burgess, Amy Nelson Burnett, J. Patout Burns, David B. Burrell, David Buttrick, James P. Byrd, Lavinia Byrne, Gerado Caetano, Marcos Caldas, Alkiviadis Calivas, William J. Callahan, Salvatore Calomino, Euan K. Cameron, William S. Campbell, Marcelo Ayres Camurça, Daniel F. Caner, Paul E. Capetz, Carlos F. Cardoza-Orlandi, Patrick W. Carey, Barbara Carvill, Hal Cauthron, Subhadra Mitra Channa, Mark D. 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- Edited by Daniel Patte, Vanderbilt University, Tennessee
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- The Cambridge Dictionary of Christianity
- Published online:
- 05 August 2012
- Print publication:
- 20 September 2010, pp xi-xliv
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8 - Genes Classical and Genes Developmental: The Different Use of Genes in Evolutionary Syntheses
- from PART THREE - GENETIC PROGRAMS AND DEVELOPMENTAL GENES
- Edited by Peter J. Beurton, Max-Planck-Institut für Wissenschaftsgeschichte, Berlin, Raphael Falk, Hebrew University of Jerusalem, Hans-Jörg Rheinberger, Max-Planck-Institut für Wissenschaftsgeschichte, Berlin
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- The Concept of the Gene in Development and Evolution
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- 12 January 2010
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- 29 May 2000, pp 178-192
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Summary
ABSTRACT
Dobzhansky (1964) stated that “Nothing in biology makes sense except in the light of evolution,” and the function of the gene is no exception. The use of genes in population genetics and developmental genetics differs significantly. This is reflected in the roles that genes are postulated to play in evolution. In the Modern Synthesis of population genetics and evolution, genes become manifest by differences in alleles that are active in conferring differential reproductive success in adult individuals. The gene is thought to act as a particulate, atomic unit. In current syntheses of evolution and developmental genetics, important genes are manifest by their similarities across distantly related phyla, and they are active in the construction of embryos. These developmental genes are thought to act in a contextdependent network. In the population genetics model of evolution, mutations in genes provide insights into the mechanisms for natural selection and microevolution. Different individuals will be selected and their genes will be represented in higher proportions in the next generation. For the developmental geneticist, mutations in the genes provide insights into the mechanisms of phylogeny and macroevolution. Different modes of regulation may enable the production of new types of structures or the modification of existing ones. The importance of developmental approaches to the role of genes is exemplified by the discovery and subsequent analysis of the developmental gene MyoD.
The concept of the gene has had its own radiation once it entered into the territory of developmental biology.
Wormwholes: A Commentary on K. F. Schaffner's “Genes, Behavior, and Developmental Emergentism”
- Scott F. Gilbert, Erik M. Jorgensen
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- Journal:
- Philosophy of Science / Volume 65 / Issue 2 / June 1998
- Published online by Cambridge University Press:
- 01 April 2022, pp. 259-266
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- June 1998
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Although Caenorhabditis elegans was chosen and modified to be an organism that would facilitate a reductionist program for neurogenetics, recent research has provided evidence for properties that are emergent from the neurons. While neurogenetic advances have been made using C. elegans which may be useful in explaining human neurobiology, there are severe limitations on C. elegans to explain any significant human behavior.
Resurrecting the Body: Has Postmodernism Had Any Effect on Biology?
- Scott F. Gilbert
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- Journal:
- Science in Context / Volume 8 / Issue 4 / Winter 1995
- Published online by Cambridge University Press:
- 26 September 2008, pp. 563-577
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- Winter 1995
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While postmodernism has had very little influence in biology (for reasons discussed in the paper), it can provide a framework for discussing the context in which biology is done. Here, four biological views of the body/self are contrasted: the neural, immunological, genetic, and Phenotypic bodies. Each physical view of the body extrapolates into a different model of the body politic, and each posits a different relationship between bodies of knowledge. The neural view of the body models a body politic wherein society is defined by its culture and laws. The genetic view privileges views of polities based on ethnicity and race. The immune body extrapolates into polities that can defend themselves against other such polities. The phenotypic view of the body politic stands in opposition to these three major perspectives and integrates them without given any predominance. The view of science as a “neural” body of knowledge contends that science is aperspectival and objective. The perspective of the “immune” body is that science exists to defend the interests of its creators. The genetic view of science is that science is the basis of all culture. The extrapolation of the phenotypic body to science insists upon the utilitarian rationale for scientific enterprises. In all instances, the genetic view of the body/body politic/body of science is presently in ascendance.
Introduction Postmodernism and Science
- Scott F. Gilbert
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- Science in Context / Volume 8 / Issue 4 / Winter 1995
- Published online by Cambridge University Press:
- 26 September 2008, pp. 559-561
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- Winter 1995
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