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  • 1
    Electronic Resource
    Electronic Resource
    Ambidentate character of oxime groups in metal complexes. The crystal structure of (4-methyliminopentane-2,3-dione 3-oximato)(4-iminopentane-2,3-dione 3-oximato)nickel(II) (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 29 (1973), S. 2477-2482 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740873006886
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  • 2
    Electronic Resource
    Electronic Resource
    Variation in relative quantities of airborne sex pheromone components from individual femaleEphestia cautella (Lepidoptera: Pyralidae) (1987)
    Springer
    Journal of chemical ecology 13 (1987), S. 639-653 
    Details
    ISSN: 1573-1561
    Keywords: Effluvium ; variation ; Ephestia cautella ; Lepidoptera ; Pyralidae ; single insect ; pheromone composition ; behaviour ; GC-MS ; (Z,E)-9,12-tetradecadien-1-yl acetate ; (Z)-9-tetradecen-1-yl acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The airborne sex pheromone components (Z,E)-9,12-tetradeca-dien-1-yl acetate and (Z)-9-tetradecen-1-y1 acetate from single calling females ofEphestia cautella (Walker) were trapped within glass capillary tubes and were measured by gas chromatography-mass spectrometry. Broad and similar distributions of relative quantities were found for a laboratory strain and three Australian field strains, and means differed strongly from those reported previously for this species. The overall mean proportion of the two components found for Australian females was 88∶12. The composition in individuals ranged from 63∶27 to 97∶3. The proportions for individuals appeared to vary slightly in a random fashion from day to day, and proportions for first-generation progeny were influenced by the maternal blend.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01880106
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  • 3
    Electronic Resource
    Electronic Resource
    Dihydromatricariate-based triglycerides, glyceride ethers, and waxes in the australian soldier beetle,Chauliognathus lugubris (Coleoptera: Cantharidae) (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 411-423 
    Details
    ISSN: 1573-1561
    Keywords: Dihydromatricaria acid ; triglyceride ; (Z)-dec-8-ene-4,6-diynoic acid ; glyceride ethers ; waxes ; antifeedant ; Chauliognathus lugubris ; Coleoptera ; Cantharidae ; accessory glands ; defense
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The soldier beetleChauliognathus lugubris is shown to contain triglycerides and glyceride ethers of 8-dihydromatricaria acid, and waxes of the C12 homolog, of this acid, as well as the previously reported free acid. The triglycerides contain one, two, or three dihydromatricariate moieties, with any remaining positions esterified with normal fatty acids. The glyceride ethers were monostearyl ethers of glycerol esterified with dihydromatricaria acid and oleic or linoleic acid. The waxes, which also include a dihydromatricaria chromophore in the alcohol moiety, occur only in the females and are present in paired accessory glands in the abdomen. The ethers are restricted to females and appear to be associated with developing eggs. The triglycerides are much more abundant in females than males. Triglycerides, glyceride ethers, and waxes represent about 95% of the dihydromatricariate moiety (average, ca. 590 μg) in females with free acid the remainder; in males free acid is present to over 50% (ca. 22 μg) and the remainder is triglyceride (ca. 15 μg). Larvae contain mainly tridihydromatricariate-substituted triglyceride and a smaller quantity of the free acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01013893
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  • 4
    Electronic Resource
    Electronic Resource
    Convenient method applicable to single insects for collection and measurement of blend ratios of airborne pheromones from artificial sources (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 1677-1692 
    Details
    ISSN: 1573-1561
    Keywords: airborne pheromones ; collection ; GC-MS ; single insect ; glass surface ; pheromone composition ; (Z,E)-9,12-tetradecandienyl acetate ; aldehydes ; alcohol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A simple, fast, and sensitive technique has been developed for collecting airborne pheromones with potential application to a live and free-moving single insect. The surface within a disposable glass (Pasteur) pipet is sufficient to trap low nanogram quantities of sex pheromones, and molecules sensitive to oxidation such as (Z)-9-tetradecenal and (Z,E)-9,12-tetradecadienyl acetate are not significantly degraded during the chosen periods of aerial trapping. Rapid measurements of blend ratios for synthetic pheromone mixtures and detection at the low picogram level have been achieved by GC-MS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987354
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  • 5
    Electronic Resource
    Electronic Resource
    Chemical composition of sex pheromone of oriental fruit moth and rates of release by individual female moths (1992)
    Springer
    Journal of chemical ecology 18 (1992), S. 1421-1435 
    Details
    ISSN: 1573-1561
    Keywords: Grapholita molesta ; Lepidoptera ; Tortricidae ; sex pheromone ; effluvium ; release rates ; GC-MS ; (E/Z)-8-dodecenyl acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The sex pheromone emitted by individual calling females of the oriental fruit moth,Grapholita molesta, was trapped within glass capillaries, and the composition and release rates were determined by gas chromatography-mass spectrometry. Aerial release of (Z)-8-dodecenyl acetate ranged up to 25.3 ng/hr, while the mean release rate was 8.48 ± 7.26 ng/hr (±SD). The proportion of (E)-8-dodecenyl acetate to (Z)-8-dodecenyl acetate was remarkably constant (4.20 ± 0.60%). Significant amounts of dodecyl acetate were also recovered but, contrary to previous reports, only trace quantities of (Z)-8-dodecenol were detected in the effluvium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994366
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  • 6
    Electronic Resource
    Electronic Resource
    Valence-change in the mass spectra of metal complexes (1972)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 6 (1972), S. 931-937 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A review article is presented relating to the concept of valence-change in the mass spectra of metal-containing compounds. It is found that the modes of ion dissociation in these spectra are markedly dependent on the oxidation states normally assumed by the metal concerned and it is postulated that electron-transfer may be possible between the complexed metal atom and its ligands in the ion, such that the odd- or even-electron character of the ion is inter-changeable. Ion reactions such as the consecutive loss of two radicals are normally of low probability in the mass spectra of organic compounds, but are often observed in the mass spectra of metal-containing compounds and can be rationalized in terms of the valence-change concept. Convincing evidence for valence-change in some spectra is provided by the occurrence of reactions leading to the bare metal ion, or to the loss of neutral fragments containing the metal atom in a lower oxidation state than in the precursor molecule. Further applications of the concept may be found in the rationalization of the mass spectra of inorganic and organometallic compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210060814
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  • 7
    Electronic Resource
    Electronic Resource
    Chemical ionisation mass spectra of explosives (1974)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 9 (1974), S. 359-364 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The chemical ionisation mass spectra of a number of representative explosives have been obtained using hydrogen as reagent gas. Fragmentation modes of the protonated molecular ions tend to be simple although some rearrangements have been noted. Loss of a radical from an even electron parent ion has been observed. The use of ‘ghost spectra’ for confirmation of the molecular weight of the sample is stressed: these consist of ions of low abundance resulting from reactions between sample ions and sample molecules. Labelling studies were carried out using deuterium as reagent gas.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210090317
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  • 8
    Electronic Resource
    Electronic Resource
    The mass spectra of metal complexes of dibenzoylmethane (1968)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1968), S. 115-126 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of a series of metal complexes of dibenzoylmethane have been rationalized. The paths of novel rearrangement reactions involving both hydrogen and oxygen migration may differ according to the type of metal atom in the complex. Further examples are proposed of the effect of metal valency changes in ion reactions.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210010111
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  • 9
    Electronic Resource
    Electronic Resource
    Loss of CH2O and H2O by stepwise mechanisms in mass spectrometry (1971)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1971), S. 1391-1397 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Experimental evidence demonstrating reversible hydrogen transfer between specific positions in the molecular ions of anisole and o-toluic acid suggests stepwise mechanisms for the loss of CH2O and H2O, respectively. Added support for a stepwise mechanism for the loss of CH2O is found in the mass spectra of pyridine and quinoline analogues.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210051206
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  • 10
    Electronic Resource
    Electronic Resource
    Hydrogen randomization and the loss of CH3N in the mass spectra of 2-dimethylaminopyridines (1976)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1976), S. 848-856 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electron impact mass spectra of some deuterium labelled 2-dimethylaminopyridines are consistent with hydrogen randomization within the dimethylamino group prior to the loss of the elements of methylenimine.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210110810
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