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  • 1980-1984  (2)
  • 1955-1959
  • 65 J  (1)
  • Dasymutilla occidentalis  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Enclosing methods in perturbed nonlinear operator equations (1984)
    Springer
    Computing 32 (1984), S. 1-11 
    Details
    ISSN: 1436-5057
    Keywords: 65 H ; 65 J ; Nonlinear equation ; monotonous enclosure ; perturbation ; Newton- ; Regula falsi- ; Jacobi-Newton-type methods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Es werden nichtlineare Gleichungen betrachtet, die in gewissen Eingangsparametern störungsbehaftet sind. Durch eine Klasse monoton einschließender Verfahren werden Folgen von Intervallen konstruiert, die für jeden Wert der Störungsparameter mindestens eine Nullstelle der Aufgabe enthalten. Für endlich-dimensionale Räume werden u. a. Verfahrensrealisierungen vom Newton-, Regula falsi- und Jacobi-Newton-Typ angegeben.
    Notes: Abstract Nonlinear equations are considered, where some input parameters are subjected to errors. By a class of monotone enclosing methods sequences of intervals are constructed, containing for each value of the perturbation parameter at least one zero of the problem. In finite dimensional spaces concrete realizations are given, e. g. of Newton-, Regula falsi- and Jacobi-Newton-type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02243015
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mandibular gland allomones ofDasymutilla occidentalis and other mutillid wasps (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 895-903 
    Details
    ISSN: 1573-1561
    Keywords: Dasymutilla occidentalis ; Dasymutilla ; Timulla ; Pseudomethoca ; Smicromyrme ; Traumatomutilla ; Pappognatha ; Hymenoptera ; Mutillidae ; 4-methyl-3-heptanone ; 4,6-dimethyl-3-nonanone ; 4,6-dimethyl-3-octanone ; allomones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The mandibular gland secretion of the mutillid wasp,Dasymutilla occidentalis, possesses three short-chained ketones-4-methyl-3-heptanone (4MH), 4,6-dimethyl-3-nonanone (4,6DMN), 4,6-dimethyl-3-octanone (4,6DMO)—and several unidentified compounds. This is the first report of 4,6DMN as a natural product and its synthesis is described. These ketones, which are either known to be ant alarm pheromones or are structurally very similar to ant alarm pheromones, appear to function as allomones against ants, major potential predators of mutillid wasps. The major secretory component, 4-methyl-3-heptanone, which was identified in females and/ or males of the species analyzed within the generaDasymutilla, Timulla, Traumatomutilla, andPappognatha, appears to constitute a chemical character of the defensive secretions of these genera.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00990473
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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