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  • 1
    Digitale Medien
    Digitale Medien
    Modification and Evaluation of the Potato Disc Assay and Antitumor Screening of Euphorbiaceae Seeds (1982)
    s.l. : American Chemical Society
    Journal of natural products 45 (1982), S. 679-686 
    Details
    ISSN: 1520-6025
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/np50024a005
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Use of Potato Disc and Brine Shrimp Bioassays to Detect Activity and Isolate Piceatannol as the Antileukemic Principle from the Seeds of Euphorbia lagascae (1984)
    s.l. : American Chemical Society
    Journal of natural products 47 (1984), S. 347-352 
    Details
    ISSN: 1520-6025
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/np50032a019
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    A technique for evaluation of three-dimensional behavior in turbulent boundary layers using computer augmented hydrogen bubble-wire flow visualization (1983)
    Springer
    Experiments in fluids 1 (1983), S. 43-49 
    Details
    ISSN: 1432-1114
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract A system is described which allows the recreation of the three-dimensional motion and deformation of a single hydrogen bubble time-line in time and space. By digitally interfacing dualview video sequences of a bubble time-line with a computer-aided display system, the Lagrangian motion of the bubble-line can be displayed in any viewing perspective desired. The u and v velocity history of the bubble-line can be rapidly established and displayed for any spanwise location on the recreated pattern. The application of the system to the study of turbulent boundary layer structure in the near-wall region is demonstrated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00282266
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    In vivo marking of shallow-water and deep-sea amphipods by ingestion of bait mixed with fast green (1983)
    Springer
    Marine biology 73 (1983), S. 183-192 
    Details
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Seven vital stains were mixed with fish muscle and fed to a sublittoral lysianassid (Orchomene sp. A collected in Scripps Canyon off La Jolla, California USA between August 1978 and August 1981) in the laboratory to test the utility of these dyes as feeding labels for scavenging amphipods. Fast-green FCF proved to be the most effective of the stains tested; 〉90% of starved amphipods fed fast-green-stained bait (Scomber japonicus muscle) for as little as 1 h exhibited a conspicuous green coloration along the digestive tract, which lasted an average of ≥35 d. The ability to label animals with such a single, short exposure interval makes this dye especially suitable for marking scavengers attracted to bait. Fast green efficiently stained this amphipod over a broad range of concentrations (1 to 8% by weight in water) and feeding regimes, and had no significant effects on survivorship or activity of laboratory-held organisms. Nile blue A also proved to be an acceptable feeding label for Orchomene sp. A for time scales of about 1 wk. Additional laboratory and field tests between August 1978 and August 1979 indicated that fast green is an effective feeding stain for 2 bathyal species (Orchomene sp. B and O. plebs from the Ross Sea, Antarctica) and 3 abyssal species (Eurythenes gryllus, O. gerulicorbis and Paralicella caperesca from the central North Pacific Ocean) of amphipods. Field labeling of amphipods at 5 800 m in the central North Pacific Ocean with fast green demonstrates that feeding stains may be used readily as in situ marking agents for population studies of scavengers in remote environments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00406887
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  • 5
    Digitale Medien
    Digitale Medien
    Volatile food attractants forOryzaephilus surinamensis (L.) from oats (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 301-309 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Oryzaephilus surinamensis ; Coleoptera ; Cucujidae ; oats ; attractants ; (E)-2-nonenal ; (E,E)-2,4-nonadienal ; 2-furaldehyde ; formaldehyde ; propanal ; hexanal ; heptanal ; octanal ; (E)-2-heptenal
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract The sawtoothed grain beetle,Oryzaephilus surinamensis (L.) (Coleoptera: Cucujidae), is attracted to certain volatile components that occur in whole and rolled oats as determined by a laboratory pitfall chamber bioassay. More than 100 components were detected in the attractive carbonyl-containing fractions; 14 of these, making up 60% of the total, were identified and bioassayed. Although hexanal, heptanal, octanal, (E)-2-heptenal, and 2-furaldehyde, at doses ranging variously from 1 to 100 μg, were all significantly attractive, only 1 /10 to 1 /100 as much (E)-2-nonenal or (E,E)-2,4-nonadienal was necessary to produce comparable insect response. In addition, propanal and formaldehyde (previously reported in oats but not detected by us) were bioassayed and found to be attractive.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00987858
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  • 6
    Digitale Medien
    Digitale Medien
    Biological activities ofTrewia nudiflora extracts against certain economically important insect pests (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 409-418 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Pest control agent ; plant extract ; Trewia nudiflora ; trewiasine ; control agent ; antifeedant ; morphogenic agent
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract An ethanol extract ofTrewia nudiflora (Euphorbiaceae) seed was tested as an agent for controlling several economically important insects. Results suggest that this plant extract acts as an antifeedant for the spotted cucumber beetle (Diabrotica undecimpunctata howardi Barber) and the European corn borer [Ostrinia nubilalis (Hübner)] but not for the other insects tested. Also indicated were morphogenic effects on the codlingmoth [Laspeyresia pomonella (L.)], disruption of the normal life cycle of the redbanded leafroller [Argyrotaenia velutinana (Walker)], and reduction in the progeny of the plum curculio [Conotrachelus nenuphar (Herbst)]. In addition, the extract was toxic to the striped cucumber beetle [Acalymma vittatum (F.)] and gave 100% control of the chicken body louse [Menacanthus stramineus (Nitzsch)] from 5 to 28 days. Fractionation of the extract was monitored by a bioassay usingO. nubilalis. This fractionation yielded six pure compounds, the most abundant of which was trewiasine. Its LD50 was 7.4 ppm when incorporated into the diet ofO. nubilalis. Dose-mortality relationships for the other compounds withO. nubilalis are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00987789
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