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  • 1
    Electronic Resource
    Electronic Resource
    Intramolecular Hydrogen Bonding in Heterocyclic Systems (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 248-249 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has been pointed out3.4 that if covalent forces played an appreciable part in hydrogen bonding, considerable alterations in the O-H stretching band in the infra-red would be expected. In the case of intermolecular hydrogen bonds the shifts in the O-H band from 3,200 cm.-1 are usually small, and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/183248a0
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  • 2
    Electronic Resource
    Electronic Resource
    Secretion of the Dufour gland of the antNothomyrmecia macrops (Hymenoptera:Formicidae) (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 715-719 
    Details
    ISSN: 1420-9071
    Keywords: Ant ; Nothomyrmecia ; Dufour gland ; hydrocarbons ; farnesene ; springene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The Dufour gland of the primitive Australian antNothomyrmecia macrops contains microgram quantities in total of linear alkanes and alkenes from C13 to C30 with heptadecene the major component (66%). In all, 50 substances, including methyl-branched hydrocarbons, aldehydes and acetates, α-farnesene and α-springene in low nanogram amounts, were identified by gas chromatography-mass spectrometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941041
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  • 3
    Electronic Resource
    Electronic Resource
    Contents of Dufour glands in some formicine ants: queens and workers of Camponotus aethiops and a re-examination of Lasius fuliginosus (1988)
    Springer
    Entomologia experimentalis et applicata 46 (1988), S. 109-115 
    Details
    ISSN: 1570-7458
    Keywords: Ants ; Dufour gland ; Camponotus aethiops ; Lasius fuliginosus ; queens ; hydrocarbons ; 2-alkanones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Les sécrétions des glandes de Dufour sont toutes semblables et comprennent, chez les reines et les ouvrières de C. aethiops, une chaîne linéaire d'hydrocarbures de C10 à C15, avec C11 comme constituant principal. Les différences entre les castes se traduisent chez la reine, par une teneur totale en sécrétions plus faible et l'existence de C15 uniquement sous forme de traces. Chez L. fuliginosus, la sécrétion de la glande de Dufour comprend une série de chaînes linéaires d'hydrocarbures (C10−C17) avec l'undécane comme constituant principal, et une série de 2-alkanones allant de C13 à C19.
    Notes: Abstract The Dufour gland secretions of both virgin queens and workers of Camponotus aethiops are similar and consist of straight chain hydrocarbons ranging from C10−C15 with C11 the major compound. The difference between the two castes is that C15 appears only as a trace in queens, and the total amount of secretion is smaller in queens than in workers. In Lasius fuliginosus, the Dufour gland secretion contains a series of straight chain hydrocarbons (C10−C17) with undecane the major compound, and a series of 2-alkanones ranging from C13 to C19.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00190840
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  • 4
    Electronic Resource
    Electronic Resource
    Methyl 6-methylsalicylate, trail pheromone of the ant Tetramorium impurum (1987)
    Springer
    Naturwissenschaften 74 (1987), S. 596-597 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00368520
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  • 5
    Electronic Resource
    Electronic Resource
    The contents of the pygidial gland of the primitive antNothomyrmecia macrops (Hymenoptera:Formicidae) (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 794-797 
    Details
    ISSN: 1420-9071
    Keywords: Ant ; pygidial gland ; Nothomyrmecia ; dimethyloctenone ; γ-dodecalactone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The principal constituent of the pygidial gland ofNothomyrmecia macrops is 3,7-dimethyloct-6-en-2-one, a substance not previously identified in insects. Also identified were 2,6-dimethylhept-5-enal, 2-nonanone, indole, γ-dodecalactone, and the hydrocarbons pentadecane, heptadecane, heptadecene and heptadecadiene, all in low nanogram quantities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01959170
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  • 6
    Electronic Resource
    Electronic Resource
    3-Ethyl-2,5-dimethylpyrazine, a component of the trail pheromone of the antMessor bouvieri (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 487-489 
    Details
    ISSN: 1420-9071
    Keywords: Messor bouvieri ; Formicidae ; 3-ethyl-2,5-dimethylpyrazine ; trail pheromone ; poison gland ; anabasine ; Dufour gland ; Tapinoma simrothi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 3-Ethyl-2,5-dimethylpyrazine, found in the poison gland of workers, induces trail following in the Mediterranean harvester antMessor bouvieri. The poison gland contains on average 9 ng of this trail pheromone component. The alkaloids anabasine and anabaseine are also present in this gland, but induce no reaction in workers. Trail following is also induced by substances present in the Dufour gland, but the combined effect of both glands shows no synergism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952041
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  • 7
    Electronic Resource
    Electronic Resource
    Dufour gland contents of three species ofMyrmecia (Hymenoptera: Formicidae), primitive ants of australia (1989)
    Springer
    Journal of chemical ecology 15 (1989), S. 2191-2205 
    Details
    ISSN: 1573-1561
    Keywords: Ant ; Dufour gland ; Myrmecia ; Hymenoptera ; Formicidae ; hydrocarbons ; acetates ; eicosenal ; chemotaxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Chemical investigation of the Dufour gland contents of three species ofMyrmecia by GC and GC-MS showed thatM. gulosa andM. nigriceps contain predominantly linear hydrocarbons, whereasM. pilosula contains acetates, aldehydes, and propionates. The major components ofM. gulosa andM. nigriceps are (Z)-8-heptadecene, pentadecane, and heptadecane. Their chemical profiles are similar to each other and to that ofNothomyrmecia macrops, the most primitive living ant, placed by itself in a separate subfamily. The major components ofM. pilosula are hexadecyl acetate, (Z)-9-octadecenyl acetate, (Z)-11-eicosenyl acetate, and (Z)-11-eicosenal. Some geographical variation was observed in the relative proportions of the components. The chemotaxonomic significance for the primitive Australian ant subfamilies Myrmeciinae and Nothomyrmeciinae is considered. The possibility is discussed that 11-eicosenal or geranylcitronellol, minor components of the Dufour gland secretion ofM. gulosa, may be responsible for the aggressive behavior released by the natural stinging secretions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01014109
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  • 8
    Electronic Resource
    Electronic Resource
    Contents of dufour glands of workers of three species ofTetramorium (Hymenoptera: Formicidae) (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 669-685 
    Details
    ISSN: 1573-1561
    Keywords: Dufour gland ; ant ; Tetramorium ; pentadecane ; isomeric pentadecenes ; sesquiterpene homologues ; Hymenoptera ; Formicidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The Dufour glands of worker ants ofTetramorium caespitum, and the morphologically similarT. impurum are filled with similar, but species-specific mixtures of linear hydrocarbons and three homologous sesquiterpene corhpounds. Glands of workers ofT. caespitum contain, on average, 70 ng of oil containing C13 to C17 linear hydrocarbons withn-pentadecane (64%) and a mixture of pentadecenes (14%) as major components.T. impurum glands are smaller and contain an average of 40 ng of the same mixture but withn-pentadecane (49%) and a sesquiterpenoid compound (19%) the major components. Two isomeric pentadecenes, (Z)-6-pentadecene and (Z)-7-pentadecene are present in both species.T. semilaeve workers contain on average only 30 ng of a simple mixture of hydrocarbons with pentadecane contributing more than 90% of the total.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012101
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