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  • Computational Chemistry and Molecular Modeling  (2)
  • Aphis craccivora Koch  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Inheritance of resistance to the cowpea aphid in cowpea (1987)
    Springer
    Theoretical and applied genetics 74 (1987), S. 817-819 
    Details
    ISSN: 1432-2242
    Keywords: Aphis craccivora Koch ; Resistance genetics ; Insect resistance ; Vigna unguiculata (L.) Walp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Inheritance of resistance to cowpea aphid, Aphis craccivora Koch, in three resistant cultivars of cowpea, Vigna unguiculata (L.) Walp, was studied. The parents, F1 and F2 population were grown in an insect-proof screenhouse. Each 3-day-old seedling was infested with 10 apterous adult aphids. Seedling reaction was recorded when the susceptible check was killed. The segregation data revealed that the resistance of ICV11 and TVU310 is governed by single dominant genes. All the F2 seedlings of the cross ICV10xTVU310 were resistant, indicating that they have the same gene for resistance. However, the F2 populations from the crosses ICV10xICV11 and ICV11xTVU310 segregated in a ratio of 15∶1, indicating that the dominant genes in ICV11 and TVU310 are non-allelic and independent of each other. The resistance gene of ICV10 and TVU310 is designated as Ac1 and that of ICV11 as Ac2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00247562
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Degeneracy in one dimension: Role of singular potentials (1996)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 59 (1996), S. 219-226 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: That the bound energy eigenstates of one-dimensional quantum systems can be degenerate in the presence of specific singular or supersingular potentials is demonstrated by choosing a family of bistable and other oscillators. Relevance of our study to spectroscopic observations is noted. Quasi-degeneracy is found even in the absence of any singularity in the potential and the importance of tunneling is highlighted in this context to analyze the general nature of such potentials leading to double degeneracy. Additionally, the case of spiked oscillators is discussed with particular reference to the “Klauder phenomenon,” revealing clearly that the mere presence of singularity in the potential is not a sufficient criterion for the occurrence of degeneracy. © 1996 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 3
    Electronic Resource
    Electronic Resource
    Eigenstates of double wells at varying well depths (1995)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 54 (1995), S. 13-18 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A recipe for the accurate calculation of eigenstates of quartic double-well oscillators is presented. The behavior of eigenenergies as a function of the coupling strength is also studied. The quality of the semiclassical (WKB) expression for eigenvalues is critically assessed in this context. The analysis also includes a discussion on the possibility of degeneracy in such one-dimensional systems. © 1995 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560540104
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    Paper (German National Licenses)
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