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  • 1
    Electronic Resource
    Electronic Resource
    Gas chromatography-mass spectroscopy analysis of juvenile hormone released by insect corpora allata
    Amsterdam : Elsevier
    Analytical Biochemistry 145 (1985), S. 251-256 
    Details
    ISSN: 0003-2697
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-2697(85)90358-6
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  • 2
    Electronic Resource
    Electronic Resource
    Ergosterol biosynthesis and its inhibition by fenpropimorph in Fusarium species
    Amsterdam : Elsevier
    Phytochemistry 31 (1992), S. 1223-1233 
    Details
    ISSN: 0031-9422
    Keywords: Fusarium ; ergosterol biosynthesis ; fenpropimorph ; fungi ; fungitoxicity ; squalene ; sterol Δ^1^4-reductase ; sterolΔ^8-〉 Δ^7-isomerase ; Δ^8-sterols ; Δ^8^,^1^4-sterols
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0031-9422(92)80265-G
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  • 3
    Electronic Resource
    Electronic Resource
    Cyclopropane ring location in linear aliphatic compounds by NO^+ -induced ion-molecule reactions
    Amsterdam : Elsevier
    Tetrahedron Letters 33 (1992), S. 231-234 
    Details
    ISSN: 0040-4039
    Keywords: NO^+ ; aliphatic compounds ; cyclopropane location ; ion-molecule reactions ; mass spectrometry.
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-4039(92)88058-D
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of the sex pheromone of the maritime pine scale matsucoccus feytaudi
    Amsterdam : Elsevier
    Tetrahedron Letters 31 (1990), S. 6633-6636 
    Details
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(00)97133-8
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  • 5
    Electronic Resource
    Electronic Resource
    Mise en évidence d'une activité kairomonale des œufs de la pyrale du maïs sur les femelles deTrichogramma maidis (1989)
    Springer
    BioControl 34 (1989), S. 569-580 
    Details
    ISSN: 1573-8248
    Keywords: Ostrinia nubilalis ; Trichogramma maidis ; relation hôte-parasite ; kairomone ; extraits d'œufs ; Ostrinia nubilalis ; Trichogramma maidis ; host-parasite relationships ; kairomones ; egg extract
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Extracts from the surface of eggs of the European corn borer were tested in small observation chambers and in a linear olfactometer for their effects on the searching behaviour of the egg-parasitoidTrichogramma maidis. In the observation chambers, the extracts elicited exploratory behaviour by female parasitoids with no previous oviposition experiences and increased the time the females spent in walking and drumming their antennae. Recording the position of 10 ♀♀ each minute for 15 min in 2 tubes of an olfactometer, indicated that upwind motion was significantly greater in the tube containing 10 μl of an egg extract than in the control tube containing just solvent. It is concluded that kairomones are present onO. nubilalis eggs and could act as searching incitants and short-range attractants. Preliminary GC and GC/MS analysis revealed the abundance of hydrocarbons in the extracts but the active chemicals were not characterized.
    Notes: Résumé Des extraits de la surface d'œufs de Pyrale du maïs ont été testés en microenceinte et dans un olfactomètre linéaire sur des ♀♀ deTrichogramma maidis. En microenceinte, les extraits stimulent la locomotion et le comportement exploratoire des ♀♀. En olfactomètre ils stimulent à distance la remontée des tubes vers la source. Ces résultats impliquent la présence de substances à activité kairomonale sur les œufs de Pyrale du maïs. Des analyses préliminaires des extraits ont été faites par chromatographie en phase gazeuse couplée ou non à la spectrométrie de masse et démontrent la présence de nombreux hydrocarbures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374395
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  • 6
    Electronic Resource
    Electronic Resource
    A peculiar fatty acid, (Z,Z)-9,12,17-octadecatrienoic acid, identified in the phospholipids of the pea aphid,Acyrthosiphon pisum (Harris) (homoptera: aphididae) (1993)
    Springer
    Cellular and molecular life sciences 49 (1993), S. 915-918 
    Details
    ISSN: 1420-9071
    Keywords: Homoptera ; Aphididae ; pea aphid ; fatty acid ; phospholipid ; (Z,Z)-9,12,17-octadecatrienoic acid ; symbiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A peculiar fatty acid previously detected in the phospholipids of the pea aphid,Acyrthosiphon pisum, is identified as (Z,Z)-9,12,17-octadecatrienoic acid. It is the first report of this compound in the literature. Comparison of fatty acid profiles of phospholipids between normal and aposymbiotic pea aphids shows that aphid symbionts are not responsible for the biosynthesis of this unusual fatty acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952609
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  • 7
    Electronic Resource
    Electronic Resource
    Transesterification of juvenile hormone occurs in vivo in locust when injected in alcoholic solvents (1995)
    Springer
    Cellular and molecular life sciences 51 (1995), S. 1220-1224 
    Details
    ISSN: 1420-9071
    Keywords: Transesterification ; insect ; JH metabolism ; ethyl-JH
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Catabolism of juvenile hormone was studied in vivo in the African locust by injection of the labelled natural enantiomer (10R) (12-3H) JH-III. Due to the poor solubility of JH in aqueous solution, it was injected in a water-miscible solvent. Ethanol was chosen for its apparently low toxicity towards the locust. In these experimental conditions, reverse phase liquid chromatography procedure (RP-HPLC) coupled with on line radiodetection, revealed an apolar metabolite of JH-III. This compound was found both in adult females and in fifth stadium larvae. We demonstrate that this metabolite resulted from substitution of the carboxyl methyl group of JH-III by some hydrophobic moiety. This compound co-migrates in our RP-HPLC system with the JH analog epoxy-ethyl farnesoate (JH-III ethyl ester) obtained by KCN-catalysed transesterification of JH-III in ethanol. Both JH-III ethyl ester of chemical origin and biological compounds extracted from locusts give the same spectra when analyzed by gas chromatography-mass spectroscopy (GC-MS). Transesterification of JH-III was not observed with locust tissues incubated in vitro but occurred in vivo even if JH was injected in other alcoholic solvents such as propanol. Our data suggest that transesterification of JH-III occurred in vivo and underline the role of injecting solvent in in vivo studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01944740
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  • 8
    Electronic Resource
    Electronic Resource
    Chemical analysis of the pheromone blends produced by males and females of the neotropical moth,Mocis megas (Guénée) (Lepidoptera, Noctuidae, Catocalinae) (1990)
    Springer
    Cellular and molecular life sciences 46 (1990), S. 536-539 
    Details
    ISSN: 1420-9071
    Keywords: Sex pheromone ; male secretion ; chemical analysis ; (Z,Z) 6,9 heneicosadiene ; (Z,Z,Z) 3,6,9 heneicosatriene ; (Z,Z)-3,6-cis-9S,10R-epoxyheneicosadiene ; Mocis megas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Pheromonal secretions produced by females and males of the noctuid moth,Mocis megas (Guénée) have been analyzed by gas chromatography and mass spectrometry (EI (electron impact) and CI (chemical ionization)). The female sex pheromone was a blend of (Z,Z,Z) 3,6,9 heneicosatriene (55%) and (Z,Z) 3,6-cis-9S, 10R-epoxyheneicosadiene (45%). Male secretion produced at the level of a prothoracic organ was a blend of two unsaturated major hydrocarbons: (Z,Z) 6,9 heneicosadiene, (64%) and (Z,Z,Z) 3,6,9 heneicosatriene (24%) and C19, C20 and C22 homologues (total ratio 12%), as minor components. The trienic hydrocarbon was present in both sexes. The behavioral role of this male secretion has not yet been elucidated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01954259
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  • 9
    Electronic Resource
    Electronic Resource
    Isolement et identification de composés à activité phéromonale chez les femelles de l'arctiide Tyria jacobaeae: Détermination biologique de la configuration absolue du composé majoritaire (1988)
    Springer
    Entomologia experimentalis et applicata 46 (1988), S. 281-289 
    Details
    ISSN: 1570-7458
    Keywords: Lepidoptera ; Arctiidae ; Sex Pheronome ; Behaviour ; Electroantennography ; Physico-chemistry ; (Z,Z)-3,6-Cis-9S,10R-epoxyheneicosadiene ; (Z,Z)-3,6-Cis-9,10-epoxyeicosadiene ; (Z,Z,Z)-3,6,9-heneicosatriene ; Lépidoptère ; Arctiidae ; Phéromone sexuelle ; Comportement ; Electroantennographie ; Physicochimie ; Epoxy-9S,10R-(Cis) hénéicosadiène-3Z,6Z ; Epoxy-9,10-(Cis) éicosadiène-3Z,6Z ; Hénéicosatriène-3Z,6Z,9Z
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Abstract The hexanic extracts from pheronomal glands of T. jacobaeae virgin females have been studied. Gas-chromatographic and mass-spectrometric analyses of the main component (no 1) (98%) in combination with behavioral and electrophysiological bioassays allowed us to determine its structure and absolue configuration: (Z,Z)-3,6-Cis-(S,R)9,10-epoxyheneicosadiene previously described in other Arctiid moths. A minor constituent (no 2) (1.5%) was identified as (Z,Z)-3,6-Cis-(S,R)9,10-epoxyeicosadiene by comparison with synthetic compound. This structure is a new one for a lepidoptera sex pheromone. The third component (no 3) of the same extracts has the same physico-chemical data as those of a previously reported constituent of another Arctiid moth: (Z,Z,Z)-3,6,9 heneicosatriene.
    Notes: Abstract Les analyses physico-chimiques d'extraits hexaniques de glandes à phéromone de femelles vierges de T. jacobaeae, associées à des études du comportement sexuel et à l'électroantennographie, ont permis d'identifier le composé majoritaire (98%) comme étant l'époxy-9S,10R-(Cis)-hénéicosadiène-3Z,6Z (no 1) et de déterminer sa configuration absolue. Les analogies entre les spectres du composé no 2 (1,5%) et ceux de l'époxy-9S,10R éicosadiène-3Z,6Z de synthèse nous conduisent à proposer cette structure pour ce constituant minoritaire. Le troisième produit (0,5%) possède les caractéristiques physico-chimiques de l'hénéicosatriène-3Z,6Z,9Z (no 3). Les produits 1 et 3 ont déjà été identifiés comme constituants de phéromones d'Arctiidae tandis que le produit 2 est décrit ici pour la première fois dans une sécrétion phéromonale de Lépidoptère.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364200
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  • 10
    Electronic Resource
    Electronic Resource
    Sex pheromone of the european sunflower moth,Homoeosoma nebulellum (Den. & Schiff.) (Lepidoptera: Pyralidae) (1991)
    Springer
    Journal of chemical ecology 17 (1991), S. 1399-1414 
    Details
    ISSN: 1573-1561
    Keywords: Lepidoptera ; Pyralidae ; Homoeosoma nebulellum ; European sunflower moth ; sex pheromone ; identification ; multicomponent blend ; (Z,E)-9,12-tetradecadienal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Four components, (Z)-9-tetradecenal (8.6%), (Z,E)-9,12-tetradecadienal (4.8%), (Z)-11-hexadecenal (49.5%), and (Z)-13-octadecenal (37.1%), were identified in extracts of female pheromone glands of the European sunflower moth,Homoeosoma nebulellum (Lepidoptera: Pyralidae) using GC and GC-MS analyses. EAG and single-cell recordings of male antennal receptors gave strong evidence for (Z,E)-9,12-tetradecadienal as the antennal key compound of sex pheromone detection in this species. This result was confirmed by field trapping; removal of (Z,E)-9,12-tetradecadienal from quaternary blends completely suppressed the male catches. The synthetic blends with this compound as a major component caught five times less males than the blends reproducing the ratio found in the female extracts [5% of (Z,E)-9,12-tetradecadienal only]. The occurrence of a minor component perceived as the most biologically relevant compound is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983772
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