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Träfflista för sökning "WFRF:(Du J.) srt2:(1990-1994)"

Sökning: WFRF:(Du J.) > (1990-1994)

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1.
  • Baker, T. C., et al. (författare)
  • Identification and bioassay of sex pheromone components of carob moth, Ectomyelois ceratoniae (Zeller)
  • 1991
  • Ingår i: Journal of Chemical Ecology. - 0098-0331. ; 17:10, s. 1973-1988
  • Tidskriftsartikel (refereegranskat)abstract
    • Three sex pheromone components of the carob moth were isolated and identified from the extract of female pheromone glands, using a variety of techniques including coupled gas chromatographic-electroantennographic recordings, coupled gas chromatographic-mass spectrometric analysis, microozonolysis, electroantennographic assays of monounsaturated standards, wind-tunnel bioassays, and field trials. The major component was identified as (Z,E)-9,11,13-tetradecatrienal, a novel lepidopterous pheromone component structure. Two minor components, either one of which improves the upwind flight response of males when blended with the major component, were identified as (Z,E)-9,11-tetradecadienal, and (Z)-9-tetra-decenal.
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2.
  • Wepener, V., et al. (författare)
  • The development of an aquatic toxicity index as a tool in the operational management of water quality in the Olifants River (Kruger National Park)
  • 1992
  • Ingår i: Koedoe. - : AOSIS. - 0075-6458 .- 2071-0771. ; 35:2, s. 1-9
  • Tidskriftsartikel (refereegranskat)abstract
    • The development of an aquatic toxicity index and its application is described. In this index the protection of aquatic life is always referred to in terms of toxic effects of different water quality variables to fish, as health indicators of the aquatic ecosystem. The final index score is produced by means of standard additive techniques as well as by using the water quality variable giving the lowest index score (minimum operator). The minimum operator is employed in order not to conceal important water quality information. The aquatic toxicity index development has been linked to toxicological data, international water quality standards and South African guidelines. The index provides valuable information concerning toxic effects of a specific variable on fish should the threshold level for normal maintanence of aquatic life be exceeded. This index is intended as an aid in the interpretation of water quality information in order to facilitate management decisions.
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