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  • 1
    Electronic Resource
    Electronic Resource
    The chromatographic behaviour of cycloolefins on stationary phases of different polarity. Prediction of their retention indices and boiling points (1987)
    Springer
    Chromatographia 23 (1987), S. 33-37 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Physico-chemical properties ; Retention indices ; Cycloolefins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The retention indices of mono and polycycloolefins with endo or exo double bonds, on squalane or polypropylenglycol 425 are related to their physico-chemical properties such as boiling point, molar volume, molar refraction, and refractive index. Equations have been empirically obtained, from which accurate retention indices of these compounds can be predicted. Unknown boiling points of some of these compounds can also be calculated from their lineal relation with the retention index on squalane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02310415
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Life cycle and adaptive strategies of three non-annual, ruderalCardueae: Onopordum nervosum, Carthamus arborescens, andCirsium scabrum (1990)
    Springer
    Plant systematics and evolution 171 (1990), S. 117-128 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Asteraceae ; Cardueae ; Onopordum nervosum ; Carthamus arborescens ; Cirsium scabrum ; Life cycle ; adaptive strategies ; autoecology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The life cycle and autoecology of three Mediterranean thorny species,Onopordum nervosum (Iberian endemic),Cirsium scabrum (Western Mediterranean) andCarthamus arborescens (Iberian-North African), of potential use in agriculture as bioenergetic, forage or oil producing plants were studied. These threeCardueae spp. are good examples of ways in which Mediterranean plants adapt their typical annual cycle to avoid summer droughts.O. nervosum is a perennial, monocarpic, heliophilous species which flowers in early summer and grows even under the extreme xeric conditions of the Mediterranean summers. It is a basiphilous plant usually found in sandy-loamy and sandy-clayey-loamy soils with a marked geographical variability in its seed germination.C. scabrum is a perennial, monocarpic species which has a long life cycle, flowering in summer and growing only during the wet months. It is not well-adapted to droughts and is usually restricted to acid soils.C. arborescens is a perennial, polycarpic species which flowers in spring and dries up in summer. It is usually found in basic loamy-sandy or sandy-loamy soils poor in organic matter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940599
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Kováts retention indices of selected mono and polycyclic olefins (1987)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 10 (1987), S. 461-463 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Mono and polycyclic olefins ; Retention index data ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240100809
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Prediction of gas chromatographic retention indices of linear, branched, and cyclic alkanes from their physicochemical properties (1984)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 191-195 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Saturated hydrocarbons ; Retention indices ; Molar refraction ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Kováts retention indices for a series of linear, branched, and cyclic alkanes on squalane at any temperature, and on other stationary phases of different polarity at a given temperature, are related to physicochemical properties of the solutes, such as boiling point and molar refraction, by multiple regression analysis. The equations found permit calculation of the Kováts retention index for all alkanes, with standard deviations close to experimental error. The same equations can also be used for calculating the physicochemical parameters they contain.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240070404
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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