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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 19 (1976), S. 11-18 
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Cette étude est basée sur les réponses antennaires de Sirex noctilio aux composants des huiles de pin et à quelques composés chimiques apparentés, en utilisant la technique de l'électro-antennogramme appliquée à une antenne isolée prélevée sur une femelle de cet insecte. Un taux de réponse à chaque composé a été établi par comparaison à la réaction enregistrée à l'égard d'une égale quantité de linalool réaction utilisée comme unité de référence. On a mis en évidence certaines corrélations entre la structure chimique et l'activité biologique des composés. A l'intérieur de chaque classe de composés, ceux qui sont insaturés et qui possèdent un squelette pinane ont la plus grande activité biologique. Cette activité biologique diffère entre les formes cis- et trans- d'un même composé et varie avec la position des groupes fonctionnels, avec également la position et le nombre des doubles-liaisons.
    Notes: Abstract A study was made of the response to components of pine oils and related compounds of antennae excised from female Sirex noctilio using electroantennogram (EAG) techniques. A response ratio of each compound was obtained after determining the response expected from the same amount of linalool, which was used as a reference material. Correlations were found between activity and chemical structure. Within each chemical class, compounds having a pinane skeleton and unsaturation showed the highest response. Activity differed between the cis- and trans-isomers of the same compound and varied according to the location of substituents with compounds possessing functional groups.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 19 (1976), S. 205-213 
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Les composés volatils émanant de Pinus radiata ne montrent que de faibles changements dans leur composition après l'abattage, bien que l'attractivité des arbres abattus à l'égard de Sirex noctilio change nettement au-delà de 3 semaines. Pendant les premières 3 semaines suivant l'abattage les monoterpènes hydrocarbons représentent plus de 95% des composés volatils et leur composition varie peu durant cette période. Les composants oxygénés (camphor, pinocamphone, isopinocamphone et trans-pinocarveol) qui sont absents ou seulement présents à l'état de traces immédiatement après l'abattage, sont produits en quantités croissantes et représentent 1% des substances volatiles au bout de 3 semaines. Leur présence dans la fraction volatile accroît de facon significative la réponse antennaire de Sirex noctilio. Les principaux monoterpènes hydrocarbonés et les composants oxygénés ont été identifiés par les techniques chromatographiques et spectrographiques.
    Notes: Abstract Volatiles emanating from Pinus radiata show only minor changes in composition with time after felling even though attractiveness of the felled timber to the wood wasp Sirex noctilio changes markedly over the first 3 weeks. Monoterpene hydrocarbons account for more than 95% of the volatiles and show little change in relative composition during this time. Oxygenated components (camphor, pinocamphone, isopinocamphone and trans-pinocarveol), which are absent or present in trace amounts immediately after felling, are produced in increasing amounts and account for 1% of the volatiles after 3 weeks. Their presence in the volatile fraction significantly increases the response from the antenna of S. noctilio. The major monoterpene hydrocarbons and oxygenated components were identified by chromatographic and spectral techniques.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 12 (1979), S. 733-736 
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Gas volume, influence of ; Preconcentration ; Wine headspace analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Examination was made of the changes in composition of aroma volatiles trapped on Chromosorb 105 during dynamic headspace sampling of aged wine. Collections from different gas volumes were analysed and a subsequent collection made. It was demonstrated that analyses of headspace collections containing reduced quantities of the more volatile and more, hydrophobic compounds could aid in the identification and quantitative determination of alcoholic beverage components.
    Type of Medium: Electronic Resource
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  • 4
    Publication Date: 1979-11-01
    Print ISSN: 0009-5893
    Electronic ISSN: 1612-1112
    Topics: Chemistry and Pharmacology
    Published by Springer
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  • 5
    Publication Date: 1978-01-01
    Print ISSN: 1527-1404
    Electronic ISSN: 1938-3681
    Topics: Geosciences
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