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  • 1
    Publication Date: 2003-03-15
    Description: Captive breeding and release programs, widely used to supplement populations of declining species, minimize juvenile mortality to achieve rapid population growth. However, raising animals in benign environments may promote traits that are adaptive in captivity but maladaptive in nature. In chinook salmon, hatchery rearing relaxes natural selection favoring large eggs, allowing fecundity selection to drive exceptionally rapid evolution of small eggs. Trends toward small eggs are also evident in natural populations heavily supplemented by hatcheries, but not in minimally supplemented populations. Unintentional selection in captivity can lead to rapid changes in critical life-history traits that may reduce the success of supplementation or reintroduction programs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heath, Daniel D -- Heath, John W -- Bryden, Colleen A -- Johnson, Rachel M -- Fox, Charles W -- New York, N.Y. -- Science. 2003 Mar 14;299(5613):1738-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Great Lakes Institute for Environmental Research and Department of Biological Sciences, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada. dheath@uwindsor.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12637746" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Body Constitution ; Body Weight ; *Breeding ; Conservation of Natural Resources ; Environment ; Female ; Fertility ; *Fisheries ; Ovum/*physiology ; Salmon/genetics/*physiology ; Selection, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1989-10-06
    Description: The tyrosine kinase pp60v-src, encoded by the v-src oncogene, seems to regulate phosphatidylinositol metabolism. The effect of pp60v-src on control points in inositol phosphate production was examined by measuring the amounts of inositol polyphosphates in Rat-1 cells expressing wild-type or mutant forms of the protein. Expression of v-src-resulted in a five- to sevenfold elevation in the steady-state amount of an isomer of inositol tetrakisphosphate, whereas the concentrations of inositol trisphosphates or other inositol tetrakisphosphates were not affected. The activity of a key enzyme in the formation of inositol tetrakisphosphates, inositol (1,4,5)-trisphosphate 3-kinase, was increased six- to eightfold in cytosolic extracts prepared from the v-src-transformed cells, suggesting that this enzyme may be one target for the pp60v-src kinase and that it may participate in the synthesis of novel, higher order inositol phosphates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnson, R M -- Wasilenko, W J -- Mattingly, R R -- Weber, M J -- Garrison, J C -- CA-39076/CA/NCI NIH HHS/ -- CA-40042/CA/NCI NIH HHS/ -- DK-19952/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1989 Oct 6;246(4926):121-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Virginia School of Medicine, Charlottesville 22908.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2506643" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line, Transformed ; Fibroblasts/metabolism ; Inositol Phosphates/*metabolism ; Isomerism ; Oncogene Protein pp60(v-src) ; Protein-Tyrosine Kinases/metabolism ; Rats ; Retroviridae Proteins/*physiology ; Sugar Phosphates/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2010-01-16
    Description: We report here genome sequences and comparative analyses of three closely related parasitoid wasps: Nasonia vitripennis, N. giraulti, and N. longicornis. Parasitoids are important regulators of arthropod populations, including major agricultural pests and disease vectors, and Nasonia is an emerging genetic model, particularly for evolutionary and developmental genetics. Key findings include the identification of a functional DNA methylation tool kit; hymenopteran-specific genes including diverse venoms; lateral gene transfers among Pox viruses, Wolbachia, and Nasonia; and the rapid evolution of genes involved in nuclear-mitochondrial interactions that are implicated in speciation. Newly developed genome resources advance Nasonia for genetic research, accelerate mapping and cloning of quantitative trait loci, and will ultimately provide tools and knowledge for further increasing the utility of parasitoids as pest insect-control agents.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2849982/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2849982/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Werren, John H -- Richards, Stephen -- Desjardins, Christopher A -- Niehuis, Oliver -- Gadau, Jurgen -- Colbourne, John K -- Nasonia Genome Working Group -- Beukeboom, Leo W -- Desplan, Claude -- Elsik, Christine G -- Grimmelikhuijzen, Cornelis J P -- Kitts, Paul -- Lynch, Jeremy A -- Murphy, Terence -- Oliveira, Deodoro C S G -- Smith, Christopher D -- van de Zande, Louis -- Worley, Kim C -- Zdobnov, Evgeny M -- Aerts, Maarten -- Albert, Stefan -- Anaya, Victor H -- Anzola, Juan M -- Barchuk, Angel R -- Behura, Susanta K -- Bera, Agata N -- Berenbaum, May R -- Bertossa, Rinaldo C -- Bitondi, Marcia M G -- Bordenstein, Seth R -- Bork, Peer -- Bornberg-Bauer, Erich -- Brunain, Marleen -- Cazzamali, Giuseppe -- Chaboub, Lesley -- Chacko, Joseph -- Chavez, Dean -- Childers, Christopher P -- Choi, Jeong-Hyeon -- Clark, Michael E -- Claudianos, Charles -- Clinton, Rochelle A -- Cree, Andrew G -- Cristino, Alexandre S -- Dang, Phat M -- Darby, Alistair C -- de Graaf, Dirk C -- Devreese, Bart -- Dinh, Huyen H -- Edwards, Rachel -- Elango, Navin -- Elhaik, Eran -- Ermolaeva, Olga -- Evans, Jay D -- Foret, Sylvain -- Fowler, Gerald R -- Gerlach, Daniel -- Gibson, Joshua D -- Gilbert, Donald G -- Graur, Dan -- Grunder, Stefan -- Hagen, Darren E -- Han, Yi -- Hauser, Frank -- Hultmark, Da -- Hunter, Henry C 4th -- Hurst, Gregory D D -- Jhangian, Shalini N -- Jiang, Huaiyang -- Johnson, Reed M -- Jones, Andrew K -- Junier, Thomas -- Kadowaki, Tatsuhiko -- Kamping, Albert -- Kapustin, Yuri -- Kechavarzi, Bobak -- Kim, Jaebum -- Kim, Jay -- Kiryutin, Boris -- Koevoets, Tosca -- Kovar, Christie L -- Kriventseva, Evgenia V -- Kucharski, Robert -- Lee, Heewook -- Lee, Sandra L -- Lees, Kristin -- Lewis, Lora R -- Loehlin, David W -- Logsdon, John M Jr -- Lopez, Jacqueline A -- Lozado, Ryan J -- Maglott, Donna -- Maleszka, Ryszard -- Mayampurath, Anoop -- Mazur, Danielle J -- McClure, Marcella A -- Moore, Andrew D -- Morgan, Margaret B -- Muller, Jean -- Munoz-Torres, Monica C -- Muzny, Donna M -- Nazareth, Lynne V -- Neupert, Susanne -- Nguyen, Ngoc B -- Nunes, Francis M F -- Oakeshott, John G -- Okwuonu, Geoffrey O -- Pannebakker, Bart A -- Pejaver, Vikas R -- Peng, Zuogang -- Pratt, Stephen C -- Predel, Reinhard -- Pu, Ling-Ling -- Ranson, Hilary -- Raychoudhury, Rhitoban -- Rechtsteiner, Andreas -- Reese, Justin T -- Reid, Jeffrey G -- Riddle, Megan -- Robertson, Hugh M -- Romero-Severson, Jeanne -- Rosenberg, Miriam -- Sackton, Timothy B -- Sattelle, David B -- Schluns, Helge -- Schmitt, Thomas -- Schneider, Martina -- Schuler, Andreas -- Schurko, Andrew M -- Shuker, David M -- Simoes, Zila L P -- Sinha, Saurabh -- Smith, Zachary -- Solovyev, Victor -- Souvorov, Alexandre -- Springauf, Andreas -- Stafflinger, Elisabeth -- Stage, Deborah E -- Stanke, Mario -- Tanaka, Yoshiaki -- Telschow, Arndt -- Trent, Carol -- Vattathil, Selina -- Verhulst, Eveline C -- Viljakainen, Lumi -- Wanner, Kevin W -- Waterhouse, Robert M -- Whitfield, James B -- Wilkes, Timothy E -- Williamson, Michael -- Willis, Judith H -- Wolschin, Florian -- Wyder, Stefan -- Yamada, Takuji -- Yi, Soojin V -- Zecher, Courtney N -- Zhang, Lan -- Gibbs, Richard A -- 5R01GM070026-04/GM/NIGMS NIH HHS/ -- 5R01HG000747-14/HG/NHGRI NIH HHS/ -- 5R24GM084917-02/GM/NIGMS NIH HHS/ -- AI028309-13A2/AI/NIAID NIH HHS/ -- R01 AI055624/AI/NIAID NIH HHS/ -- R01 GM064864/GM/NIGMS NIH HHS/ -- R01 GM064864-04/GM/NIGMS NIH HHS/ -- R01 GM064864-05A2/GM/NIGMS NIH HHS/ -- R01 GM070026/GM/NIGMS NIH HHS/ -- R01 GM070026-04S1/GM/NIGMS NIH HHS/ -- R01 GM079484/GM/NIGMS NIH HHS/ -- R01 GM085163/GM/NIGMS NIH HHS/ -- R01 GM085163-01/GM/NIGMS NIH HHS/ -- R01 GM085233/GM/NIGMS NIH HHS/ -- R01 HG000747/HG/NHGRI NIH HHS/ -- R01 HG000747-14/HG/NHGRI NIH HHS/ -- R01GM064864/GM/NIGMS NIH HHS/ -- R24 GM084917/GM/NIGMS NIH HHS/ -- R24 GM084917-01/GM/NIGMS NIH HHS/ -- R24 GM084917-02/GM/NIGMS NIH HHS/ -- U54 HG003273/HG/NHGRI NIH HHS/ -- U54 HG003273-03/HG/NHGRI NIH HHS/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Jan 15;327(5963):343-8. doi: 10.1126/science.1178028.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20075255" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arthropods/parasitology ; *Biological Evolution ; DNA Methylation ; DNA Transposable Elements ; Female ; Gene Transfer, Horizontal ; Genes, Insect ; Genetic Speciation ; Genetic Variation ; *Genome, Insect ; Host-Parasite Interactions ; Insect Proteins/genetics/metabolism ; Insect Viruses/genetics ; Insects/genetics ; Male ; Molecular Sequence Data ; Quantitative Trait Loci ; Recombination, Genetic ; Sequence Analysis, DNA ; Wasp Venoms/chemistry/toxicity ; Wasps/*genetics/physiology ; Wolbachia/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2015-05-16
    Description: The evolution of eusociality is one of the major transitions in evolution, but the underlying genomic changes are unknown. We compared the genomes of 10 bee species that vary in social complexity, representing multiple independent transitions in social evolution, and report three major findings. First, many important genes show evidence of neutral evolution as a consequence of relaxed selection with increasing social complexity. Second, there is no single road map to eusociality; independent evolutionary transitions in sociality have independent genetic underpinnings. Third, though clearly independent in detail, these transitions do have similar general features, including an increase in constrained protein evolution accompanied by increases in the potential for gene regulation and decreases in diversity and abundance of transposable elements. Eusociality may arise through different mechanisms each time, but would likely always involve an increase in the complexity of gene networks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kapheim, Karen M -- Pan, Hailin -- Li, Cai -- Salzberg, Steven L -- Puiu, Daniela -- Magoc, Tanja -- Robertson, Hugh M -- Hudson, Matthew E -- Venkat, Aarti -- Fischman, Brielle J -- Hernandez, Alvaro -- Yandell, Mark -- Ence, Daniel -- Holt, Carson -- Yocum, George D -- Kemp, William P -- Bosch, Jordi -- Waterhouse, Robert M -- Zdobnov, Evgeny M -- Stolle, Eckart -- Kraus, F Bernhard -- Helbing, Sophie -- Moritz, Robin F A -- Glastad, Karl M -- Hunt, Brendan G -- Goodisman, Michael A D -- Hauser, Frank -- Grimmelikhuijzen, Cornelis J P -- Pinheiro, Daniel Guariz -- Nunes, Francis Morais Franco -- Soares, Michelle Prioli Miranda -- Tanaka, Erica Donato -- Simoes, Zila Luz Paulino -- Hartfelder, Klaus -- Evans, Jay D -- Barribeau, Seth M -- Johnson, Reed M -- Massey, Jonathan H -- Southey, Bruce R -- Hasselmann, Martin -- Hamacher, Daniel -- Biewer, Matthias -- Kent, Clement F -- Zayed, Amro -- Blatti, Charles 3rd -- Sinha, Saurabh -- Johnston, J Spencer -- Hanrahan, Shawn J -- Kocher, Sarah D -- Wang, Jun -- Robinson, Gene E -- Zhang, Guojie -- DP1 OD006416/OD/NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Jun 5;348(6239):1139-43. doi: 10.1126/science.aaa4788. Epub 2015 May 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Carl R. WoeseInstitute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Biology, Utah State University, Logan, UT 84322, USA. karen.kapheim@usu.edu wangj@genomics.org.cn generobi@illinois.edu zhanggj@genomics.org.cn. ; China National GeneBank, BGI-Shenzhen, Shenzhen, 518083, China. ; China National GeneBank, BGI-Shenzhen, Shenzhen, 518083, China. Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Copenhagen, 1350, Denmark. ; Departments of Biomedical Engineering, Computer Science, and Biostatistics, Johns Hopkins University, Baltimore, MD 21218, USA. Center for Computational Biology, McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. ; Center for Computational Biology, McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. ; Carl R. WoeseInstitute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. ; Carl R. WoeseInstitute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. ; Carl R. WoeseInstitute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Human Genetics, University of Chicago, Chicago, IL 60637, USA. ; Carl R. WoeseInstitute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Program in Ecology and Evolutionary Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Biology, Hobart and William Smith Colleges, Geneva, NY 14456, USA. ; Roy J. Carver Biotechnology Center, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. ; Department of Human Genetics, Eccles Institute of Human Genetics, University of Utah, Salt Lake City, UT 84112, USA. USTAR Center for Genetic Discovery, University of Utah, Salt Lake City, UT 84112, USA. ; Department of Human Genetics, Eccles Institute of Human Genetics, University of Utah, Salt Lake City, UT 84112, USA. ; U.S. Department of Agriculture-Agricultural Research Service (USDA-ARS) Red River Valley Agricultural Research Center, Biosciences Research Laboratory, Fargo, ND 58102, USA. ; Center for Ecological Research and Forestry Applications (CREAF), Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain. ; Department of Genetic Medicine and Development, University of Geneva Medical School, 1211 Geneva, Switzerland. Swiss Institute of Bioinformatics, 1211 Geneva, Switzerland. Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA. The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. ; Department of Genetic Medicine and Development, University of Geneva Medical School, 1211 Geneva, Switzerland. Swiss Institute of Bioinformatics, 1211 Geneva, Switzerland. ; Institute of Biology, Department Zoology, Martin-Luther-University Halle-Wittenberg, Hoher Weg 4, D-06099 Halle (Saale), Germany. Queen Mary University of London, School of Biological and Chemical Sciences Organismal Biology Research Group, London E1 4NS, UK. ; Institute of Biology, Department Zoology, Martin-Luther-University Halle-Wittenberg, Hoher Weg 4, D-06099 Halle (Saale), Germany. Department of Laboratory Medicine, University Hospital Halle, Ernst Grube Strasse 40, D-06120 Halle (Saale), Germany. ; Institute of Biology, Department Zoology, Martin-Luther-University Halle-Wittenberg, Hoher Weg 4, D-06099 Halle (Saale), Germany. ; Institute of Biology, Department Zoology, Martin-Luther-University Halle-Wittenberg, Hoher Weg 4, D-06099 Halle (Saale), Germany. German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig, 04103 Leipzig, Germany. ; School of Biology, Georgia Institute of Technology, Atlanta, GA 30332, USA. ; Department of Entomology, University of Georgia, Griffin, GA 30223, USA. ; Center for Functional and Comparative Insect Genomics, Department of Biology, University of Copenhagen, Copenhagen, Denmark. ; Departamento de Biologia, Faculdade de Filosofia, Ciencias e Letras de Ribeirao Preto, Universidade de Sao Paulo, 14040-901 Ribeirao Preto, SP, Brazil. Departamento de Tecnologia, Faculdade de Ciencias Agrarias e Veterinarias, Universidade Estadual Paulista (UNESP), 14884-900 Jaboticabal, SP, Brazil. ; Departamento de Genetica e Evolucao, Centro de Ciencias Biologicas e da Saude, Universidade Federal de Sao Carlos, 13565-905 Sao Carlos, SP, Brazil. ; Departamento de Biologia, Faculdade de Filosofia, Ciencias e Letras de Ribeirao Preto, Universidade de Sao Paulo, 14040-901 Ribeirao Preto, SP, Brazil. ; Departamento de Genetica, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, 14049-900 Ribeirao Preto, SP, Brazil. ; Departamento de Biologia Celular e Molecular e Bioagentes Patogenicos, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, 14049-900 Ribeirao Preto, SP, Brazil. ; USDA-ARS Bee Research Lab, Beltsville, MD 20705 USA. ; Department of Biology, East Carolina University, Greenville, NC 27858, USA. ; Department of Entomology, Ohio Agricultural Research and Development Center, Ohio State University, Wooster, OH 44691, USA. ; Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA. ; Department of Animal Sciences, University of Illinois, Urbana, IL 61801, USA. ; Department of Population Genomics, Institute of Animal Husbandry and Animal Breeding, University of Hohenheim, Germany. ; Department of Biology, York University, Toronto, ON M3J 1P3, Canada. Janelia Farm Research Campus, Howard Hughes Medical Institue, Ashburn, VA 20147, USA. ; Department of Biology, York University, Toronto, ON M3J 1P3, Canada. ; Carl R. WoeseInstitute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Department of Computer Science, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. ; Department of Entomology, Texas A&M University, College Station, TX 77843, USA. ; Department of Organismic and Evolutionary Biology, Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA. ; China National GeneBank, BGI-Shenzhen, Shenzhen, 518083, China. Department of Biology, University of Copenhagen, 2200 Copenhagen, Denmark. Princess Al Jawhara Center of Excellence in the Research of Hereditary Disorders, King Abdulaziz University, Jeddah 21589, Saudi Arabia. Macau University of Science and Technology, Avenida Wai long, Taipa, Macau 999078, China. Department of Medicine, University of Hong Kong, Hong Kong. karen.kapheim@usu.edu wangj@genomics.org.cn generobi@illinois.edu zhanggj@genomics.org.cn. ; Carl R. WoeseInstitute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Center for Advanced Study Professor in Entomology and Neuroscience, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. karen.kapheim@usu.edu wangj@genomics.org.cn generobi@illinois.edu zhanggj@genomics.org.cn. ; China National GeneBank, BGI-Shenzhen, Shenzhen, 518083, China. Centre for Social Evolution, Department of Biology, Universitetsparken 15, University of Copenhagen, DK-2100 Copenhagen, Denmark. karen.kapheim@usu.edu wangj@genomics.org.cn generobi@illinois.edu zhanggj@genomics.org.cn.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25977371" target="_blank"〉PubMed〈/a〉
    Keywords: Amino-Acid N-Acetyltransferase ; Animals ; Bees/classification/*genetics ; DNA Transposable Elements ; *Evolution, Molecular ; Gene Expression Regulation ; Gene Regulatory Networks ; *Genetic Drift ; Genome, Insect/genetics ; Phylogeny ; Selection, Genetic ; *Social Behavior ; Transcription Factors/chemistry/genetics ; *Transcriptome
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Macromolecules 5 (1972), S. 41-45 
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
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  • 6
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 2475-2480 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: It is possible to generate high-power microwave pulses with fast rise time by using resonant cavities to obtain power gain from pulse compression. In the usual case, especially when normal-conducting cavities are used, the principal output pulse from a pulse-compression device is preceded by a precursor signal that may be only 40 dB below the main pulse. For some applications this large a prepulse is unacceptable. We have developed a prototype normal-conducting, x-band, pulse-compression cavity in which the prepulse is suppressed by more than 70 dB. When this cavity is driven by a 20-kW source, output pulses with 200-kW peak power, 5-ns pulse width, and sub-nanosecond rise time can be obtained. We have also built an s-band cavity that has produced pulses of 5-ns width, 200-MW peak power, and under 3-ns rise time. The s-band cavity is typically driven at 5–10 MW and has a prepulse that can be more than 80 dB below the peak of the main pulse.
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 553-555 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Heavy ion fusion requires high current density, low-emittance ion sources that are reliable and long lived. We report experimental and simulation results on the performance of carbon arc ion sources intended for use in a scaled induction linac experiment. These sources use a planar electrostatic plasma switch to prevent plasma from entering the extraction gap before the extraction voltage pulse is applied. This provides good beam optics for short pulse extraction. Measurements of current density and emittance are presented. Both double-slit and channel plate-pepper pot techniques are used for emittance measurement. Data presented are from a compact three-arc source with plasma coupling of the cathodes. Data on lifetime and multiple arc triggering are also presented. The plasma switch performance has been modeled with a 2D explicit electrostatic particle-in-cell code. Results showing plasma shutoff phenomena and behavior during extraction are presented. A 2D steady-state ion flow model is also used to predict the optimum plasma switch geometry for producing minimum emittance generation at the switch surface.
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 14 (1966), S. 165-169 
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The freezing point of whey was determined at 3,5, 10,15, and 20% solids content in an automatic Osmometer, and effective molecular weight of the solute was determined to be 235 using freezing point depression equations. Differential Scanning Calorimetery was used to estimate the specific heat of whey in the temperature range -40 to 20°C. The frozen water fraction and refrigeration requirements are predicted as a function of temperature. Correlations of enthalpy and the freezing point of whey are presented. With these correlations, energy required for freezing whey can be computed. The application of therm odynamic data to whey freeze concentration is demonstrated.
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 307 (1984), S. 233-237 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The cDNA sequence for murine interleukin-3, one of the colony stimulating factors that regulate haematopoiesis, codes for a polypeptide of 166 amino acids including a putative signal peptide. The predicted amino acid sequence indicates that formation of mature interleukin-3 involves proteolytic ...
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