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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of plasmids isolated from Rhizobium meliloti (1979)
    Springer
    Archives of microbiology 121 (1979), S. 1-7 
    Details
    ISSN: 1432-072X
    Keywords: Rhizobium meliloti ; Symbiosis ; Influence of the RP4 plasmid on effectivity ; Cryptic plasmids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The occurrence of endogenous plasmid DNA in Rhizobium meliloti is reported. R. meliloti strains carrying RP 4 were used to work out a suitable plasmid isolation method. By sarcosyl lysis RP 4 plasmid DNA as well as cryptic plasmid DNA was isolated. Cryptic plasmid DNA possesses a buoyant density of 1.717 g cm-3 and shows a heterogeneity in contour length. Large plasmid molecules of 130 μm length were detected in the electron microscope. We also found that RP4 is able to restore the nitrogen fixation capacity of an ineffective R. meliloti strain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409198
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  • 2
    Electronic Resource
    Electronic Resource
    Spectres de masse de derives de l'aza-6 bicyclo[3, 2, 1]octane (1972)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 6 (1972), S. 1207-1215 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mass spectra of eleven bridged aza bicyclic derivatives have been recorded. In all cases, the fragmentation is clean and characteristic. A clearcut stereochemical effect on fragmentation is observed on two pairs of epimers.
    Notes: Les spectres de masse d'une série de dérivés aza-bicycliques pontés sont examinés Dans la totalité des cas, la fragmentation est à la fois simple et caractéristique. De plus, sur deux couples d'épimères, on observe un effet stéréochimique, se traduisant par des fragmentations nettement différenciées.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210061106
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