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  • 1
    ISSN: 1420-9098
    Keywords: Vespa crabro ; cuticular hydrocarbons ; discriminant analysis ; nestmate recognition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Cuticular hydrocarbons were extracted from sixty individual workers from six colonies ofVespa crabro L. and analyzed by combined gas-chromatography/mass spectrometry. Discriminant analysis of the cuticular hydrocarbon profiles of workers and queens showed that the wasps could be grouped by colony and by caste. Stepwise discriminant analysis selected the components which were weighted most heavily in these analyses. Different combinations of cuticular hydrocarbons were important in grouping workers by colony, queens and workers by colony, and workers and queens by caste.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 40 (1995), S. 171-194 
    ISSN: 0066-4170
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 48 (1992), S. 414-416 
    ISSN: 1420-9071
    Keywords: Solitary bees ; lipid polymer ; silk ; CP/MAS13CNMR ; Hymenoptera ; Colletidae ; Hylaeus bisinuatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The nest cell lining ofHylaeus bisinuatus (Hymenoptera: Colletidae) was shown by high-resolution solidstate [13C]NMR to be composed of lipid polymer and protein. The lipid polymer was shown by reduction and subsequent GC/MS analysis to be comprised of ω-hydroxy fatty acids (C20, C22, C24 and C26) and fatty alcohols (C16 to C30). The protein portion of the lining had a silk-like amino acid composition.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 15 (1989), S. 2003-2017 
    ISSN: 1573-1561
    Keywords: Manduca sexta ; Lepidoptera ; Sphingidae ; insect cuticular lipids ; plant cuticular lipids ; plant-insect interactions ; predator-prey interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Cuticular lipid components were examined from fourth-instar larvae ofManduca sexta reared on artificial diet or growing plants. The plants used were potato, tobacco, and tomato grown in pots in a greenhouse. Twenty-eight components made up the bulk of the lipids, but there were significant differences in the proportions of them present in insects reared on the different diets. In the case of some insect cuticular lipid components, there was an obvious relationship with the surface components of the plant, but generally this relationship was weak. Nonetheless, the differences may have ecological relevance, as indicated by preliminary work on predation.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1615-6102
    Keywords: Cutin ; Epidermis ; Low temperature ; Mestome sheath ; Secale cereale ; Suberin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Winter rye (Secale cereale L cv. Puma) was grown at 20 °C and at 5 °C and the development of epidermal and mestome sheath cells of leaves from plants grown at both temperatures was compared by electron microscopy. At 5 °C, the cells became densely packed with cytoplasm and small vacuoles after 41 days of growth. By day 56 at 5 °C, epidermal and mestome sheath cells were small in diameter and multivacuolate with asymmetrically thickened walls. By day 76 at 5 °C, a new developmental stage had been reached in epidermal and mestome sheath cells. The cells were larger in diameter although the thickened cell walls and multivacuolate cytoplasm were still present. As epidermal and mestome sheath cell walls thickened during low temperature growth of winter rye, an increase in cuticle thickness and the deposition of a lamellar layer could be observed in epidermal and mestome sheath cells, respectively. The lipid-derived polymers from the leaves of rye plants grown at 20 °C were shown by reductive depolymerization and GC-MS analysis to be comprised of 18-hydroxy-9, 10-epoxyoctadecanoic acid (47%) and dihydroxyhexa-decanoic acid (29%). The leaves of plants grown at 5 °C had two to four times as much lipid-derived polymeric material as those grown at 20 °C and the proportion of the major monomer, 18-hydroxy-9,10-epoxyoctadecanoic acid, increased to 73% of the polymeric material. Physical isolation of both epidermal tissue and vascular bundles followed by GC-MS analysis of the monomeric components released by reduction of the respective lipid polymers showed that 18-hydroxy-9,10 epoxyoctadecanoic acid was the major monomer in the polymer of both the epidermis and the mestome sheaths. The presence of this epoxide monomer in both the cuticles and mestome sheath cell walls of rye leaves was confirmed and visualized by using an epoxide-specific staining reaction.
    Type of Medium: Electronic Resource
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