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  • 12.20.Fv  (1)
  • 3-caren-10-ol  (1)
  • Springer  (2)
  • Nature Publishing Group
  • American Meteorological Society (AMS)
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  • Springer  (2)
  • Nature Publishing Group
  • American Meteorological Society (AMS)
Years
  • 1
    Electronic Resource
    Electronic Resource
    Bhabha to Møller cross section ratios in the energy range 2.15–2.45 MeV (1993)
    Springer
    The European physical journal 345 (1993), S. 79-88 
    Details
    ISSN: 1434-601X
    Keywords: 12.20.Fv ; 13.10.+q ; 14.80.Pb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The cross sections for Bhabha and Møller scattering have been investigated in the energy range 2.1–2.4 MeV using monoenergetic positrons and electrons to search for hypothetical resonances superimposed to the continuum predicted by quantum electro dynamics. Bhabba-to-Mott, Møller-to-Mott and Møller-to-Bhabha cross section ratios were measured. The Bhabha-to-Mott ratios could be determined with statistical errors of typically 1% and remaining systematic errors not exceeding the statistical ones. No resonances in Bhabha scattering were observed. Limits for the intrinsic widths of hypothetical resonances are given. For the first time upper limits are deduced from our data for hypothetical resonances in the Møller scattering cross section in the MeV range. Additionally, Møller-to-Bhabha cross section ratios could be determined with good precision. A good agreement between the experimental and theoretical Møller-to-Bhabha ratios can be stated calling in question the recently predicted existence of series of narrow, unresolvable resonances in the Bhabha scattering cross section.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290343
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  • 2
    Electronic Resource
    Electronic Resource
    Semiochemicals produced by western balsam bark beetle,Dryocoetes confusus Swaine (Coleoptera: Scolytidae) (1987)
    Springer
    Journal of chemical ecology 13 (1987), S. 823-836 
    Details
    ISSN: 1573-1561
    Keywords: Semiochemicals ; pheromones ; enantiomers ; western balsam bark beetle ; Dryocoetes confusus ; Coleoptera ; Scolytidae ; exo- andendo-brevicomin ; trans-verbenol ; verbenone ; myrtenol ; trans-pinocarveol ; cis- andtrans-p-menthen-7-ol ; 3-caren-10-ol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The most prominent beetle-produced volatiles identified in the abdominal extracts of maleDryocoetes confusus Swaine after they had bored for 24 hr in logs of subalpine fir,Abies lasiocarpa (Hook.) Nutt. were:exo andendo-brevicomin,trans-verbenol, verbenone, myrtenol,trans-pinocarveol,cis- andtrans-p-menthen-7-ol, 3-caren-10-ol, and several monoterpenes and sesquiterpenes. Myrtenol was the only conspicuous compound in extracts from males that had been exposed toA.lasiocarpa resin volatiles for 24 hr. Laboratory bioassays indicated that both (−)- and (+)-exo-brevicomin were attractive to femaleD. confusus, and that the (−) enantiomer did not inhibit response to its antipode. Results from field trapping experiments indicated that bothero-brevicomin and myrtenol are aggregation pheromones forD. confusus.exo-Brevicomin baits were effective in causing attack byD. confusus on baited and surrounding trees, suggesting that this pheromone may have utility in manipulating populations of the beetle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020163
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