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  • Polymer and Materials Science  (2)
  • Influence of the RP4 plasmid on effectivity  (1)
  • Equisetum
  • Organic Chemistry
  • R/V Vereshchagin
  • pollen analytical standard techniques
  • 1975-1979  (2)
  • 1970-1974  (2)
  • 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
    Über den Mechanismus des Elektropolierens von Molybdän in nichtwäßrigen Elektrolyten (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 906-909 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Mechanism of the electropolishing of molybdenum in nonaqueous electrolytesMeasurements carried out on molybdenum electrodes in solutions of magnesium per-chlorate and lithium chloride in ethanol dimethylsulphoxide and dimethyl form-amide have shown that the metal can be electropolished in solutions containing perchlorate. The formal valency (nformal) of the molybdenum dissolution in the electropolishing region, as determined from the weight loss of the electrode and the charge transferred is 3≤n formal≤ 2,75.
    Notes: Es wurden Messungen an Molybdänelektroden in Lösungen von Magnesiumperchlorat und Lithiumchlorid in Äthanol, Dimethylsulfoxid und Dimethylformamid durchgeführt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740251206
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  • 3
    Electronic Resource
    Electronic Resource
    Carotenoids of Rhizobia. I. New Carotenoids from Rhizobium lupini (1977)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 60 (1977), S. 254-258 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The main pigments of Rhizobium lupini were 2,3,2′,3′-di-trans-tetrahydroxy-β,β-caroten-4-one and 2,3,2′,3′-di-trans-tetrahydroxy-β,β-carotene. As minor components 7,8,7′,8′-tetrahydro-ψ, ψ-carotene (ζ-carotene), β, β-carotene (β-carotene), and tentatively, a 2,3,2′(or 3′)-trihydroxy-β, β-caroten-4-one and a 2,3,2′(or 3′)-trihydroxy-β, β-carotene were identified.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19770600131
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  • 4
    Electronic Resource
    Electronic Resource
    Elektrochemische Untersuchungen an Molybdän (1971)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 22 (1971), S. 115-120 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Electrochemical studies on molybdenumThe authors show, that the power law found during earlier measurements is valid for at least five decimal powers of the time. The correlation derived from potentiostatic switch-in measurements has been confirmed by galvanostatic tests. The results give rise to the assumption that the kinetic law has its origin in the rates of the reactions resulting in metal dissolution. In order to elucidate these reactions a triangle potential method has been used. The findings enable a first suggestion to be made as to the reaction sequence.
    Notes: Es wird gezeigt, daß das aus früheren Messungen gefundene Potenzgesetz wenigstens über fünf Zehnerpotenzen der Zeit gültig ist. Der aus potentionstatischen Einschaltmessungen hergeleitete Zusammenhang wurde durch galvanostatische Versuche bestätigt. Die Ergebnisse deuten darauf hin, daß das Zeitgesetz seinen Ursprung im Ablauf der zur Metallauflösung führenden Reaktionen hat. Zur Klärung dieser Reaktionen wurde die Dreiecksspannungsmethode angewendet. Der Meßbefund erlaubt es, einen ersten Vorschlag über die Reaktionsfolge zu machen.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19710220202
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