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  • 1
    Electronic Resource
    Electronic Resource
    Toward a microscopic description of theM1 states in deformed even-odd nuclei (1989)
    Springer
    The European physical journal 334 (1989), S. 403-414 
    Details
    ISSN: 1434-601X
    Keywords: 21.60 ; 23.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic dipole collective excitation, known as scissors mode, is studied in odd deformed nuclei within the framework of a particle-core coupling scheme. The description is made in the intrinsic and laboratory frames. In both frames the core is described in the RPA approach by a schematic many body Hamiltonian. In the intrinsic frame we use an effective particle-core Hamiltonian which is treated perturbatively. In the laboratory frame twoK=1/2 triplets withJ=1/2, 3/2, 5/2 are constructed through projection from two intrinsic excited states respectively. Each member of these multiplets are collectivelyM1 excited from the state (K, J π)=(3/2, 3/2+). Their energies are obtained by averaging a rotationally invariant Hamiltonian. Another multiplet withK=3/2 andJ=3/2, 5/2, which is strongly coupled to the state (K, J π)=(5/2, 5/2+) through aM1 transition, is described. These results indicate that theM1 collective excitation should exist also in odd deformed nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294746
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    Paper (German National Licenses)
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  • 2
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    Sex-linked genetic influence on caste determination in a termite (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-11-10
    Description: The most ecologically successful and destructive termite species are those with both a nymph caste and an irreversibly wingless worker caste. The early developmental bifurcation separating these castes is widely accepted to be strictly environmentally determined. We present evidence that genotype also influences this process. Offspring from four different crosses of nymph- and worker-derived secondary reproductive individuals had strongly differentiated caste and sex ratios, despite uniform rearing conditions. These data fit an X-linked, one-locus-two-allele model. Of five possible genotypes, one was lethal, two resulted in workers, and two resulted in either nymphs or environmentally determined workers. Caste is thus controlled both by environment and by a complex genetic inheritance pattern.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hayashi, Yoshinobu -- Lo, Nathan -- Miyata, Hitoshi -- Kitade, Osamu -- New York, N.Y. -- Science. 2007 Nov 9;318(5852):985-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Natural History Laboratory, College of Science, Ibaraki University, Mito, Ibaraki 310-8512, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17991866" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Behavior, Animal ; Biological Evolution ; Crosses, Genetic ; Female ; *Genes, Insect ; *Genes, X-Linked ; Genotype ; Inheritance Patterns ; Isoptera/*genetics/growth & development/*physiology ; Male ; Models, Genetic ; Nymph/genetics/physiology ; Parthenogenesis ; Reproduction ; Sex Ratio ; Social Behavior
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    INSECT PHYLOGENOMICS. Comment on "Phylogenomics resolves the timing and pattern of insect evolution" (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-08-01
    Description: Misof et al. (Reports, 7 November 2014, p. 763) used a genome-scale data set to estimate the relationships among insect orders and the time scale of their evolution. Here, we reanalyze their data and show that their method has led to systematic underestimation of the evolutionary time scale. We find that key insect groups evolved up to 100 million years earlier than inferred in their study.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tong, K Jun -- Duchene, Sebastian -- Ho, Simon Y W -- Lo, Nathan -- New York, N.Y. -- Science. 2015 Jul 31;349(6247):487. doi: 10.1126/science.aaa5460.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Biological Sciences, University of Sydney, Sydney NSW 2006, Australia. ; School of Biological Sciences, University of Sydney, Sydney NSW 2006, Australia. nathan.lo@sydney.edu.au.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26228137" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Insect Proteins/*classification ; Insects/*classification ; *Phylogeny
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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