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  • 1
    Electronic Resource
    Electronic Resource
    Adiabatic variation—Part V: Nonlinear near-periodic oscillator (1976)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 27 (1976), S. 181-195 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Die langsame Modulation des fast-periodischen, aber beliebig nichtlinearen, dynamischen Systems eines Freihheitsgrades wird untersucht. Invarianz der Wirkung zu erster Ordnung wird für kaum glatte Modulation bewiesen; wenn der Hamiltonian analytisch in Zeit und Amplitude ist, wird die Wirkungsänderung exponential klein.
    Notes: Summary The slow modulation of a near-periodic, but otherwise arbitrarily nonlinear, dynamic system of one degree of freedom is studied. The action is shown to be a first-order invariant for barely smooth modulation, and to be invariant to exponential precision, if the Hamiltonian is analytic in time and amplitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01590804
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Transposition of DNA inserted into deletions of the Tn5 kanamycin resistance element (1979)
    Springer
    Molecular genetics and genomics 171 (1979), S. 7-13 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Tn5-trp hybrid transposons have been constructed by insertion of a trpPOED Hind III fragment into an in vivo Tn5 internal deletion mutant or by substitution of trp for the internal Tn5 Hind III fragment. These hybrids are called, respectively, Tn409 and Tn410. Both Tn409 and Tn410 will transpose into λ in the presence of a complementing Tn5 element. In the absence of a wild Tn5, lysogens carrying R1162::Tn409 and R1162::Tn410 plasmids will yield λtrp phages at less than six per cent of the complemented frequency. This reduction indicates that Tn409 and Tn410 lack a diffusible transposition function provided by wild Tn5 elements. However, the formation of λtrp phages without complementation is real. Most of these transducing particles contain Tn409 and Tn410 still linked to the carrier R1162 plasmid. This observation suggests that uncomplemented Tn409 and Tn410 elements mediate the formation of λ-transposon-plasmid cointegrate structures. Thus, the missing transposition function may be involved in resolving these cointegrate structures to the final λ::Tn409 or λ::Tn410 product.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00274009
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Physical and genetic studies with restriction endonucleases on the broad host-range plasmid RK2 (1977)
    Springer
    Molecular genetics and genomics 152 (1977), S. 129-135 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The cleavage map of the plasmid RK2 was determined for the five restriction endonucleases EcoRI, HindIII, Bam H-I, Sal I and Hpa I. DNA has been inserted into several of these sites and cloned in Escherichia coli. Efforts to obtain derivatives of RK2 reduced in size by restriction endonuclease digestion of the plasmid were not successful and indicated that genes required for the maintenance of this plasmid in E. coli are not tightly clustered. An RK2 derivative possessing an internal molecular rearrangement was obtained by transformation with restriction endonuclease digests of the plasmid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00268809
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The volumetric method for petroleum resource estimation (1978)
    Springer
    Mathematical geology 10 (1978), S. 501-518 
    Details
    ISSN: 1573-8868
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02461981
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Petroleum resource data systems (1977)
    Springer
    Mathematical geology 9 (1977), S. 281-299 
    Details
    ISSN: 1573-8868
    Keywords: petroleum geology ; data files ; data systems ; resource analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract Construction of a petroleum data file first requires answers to specific questions: Who are to be the users; for what purpose is the file to be used; what are to be the data sources; are proprietary data to be included; is graphic display of the data desired? After fixing these guidelines, attention may be directed to data acquisition and file building. Because many useful software systems are now readily available, this aspect of the file-building process should require little attention. In general, the software should include an open-ended format to permit addition of new data items and easy updating, with economy of space on the tape or lisc. With respect to the data, and unless the file has a narrow usage, all available data on the geological and engineering aspects of petroleum occurrence should be collected. Proprietary data should be avoided, if possible, or else clearly labeled, and the file should be planned for public use, for convenience, to provide a needed service, and to avoid the pitfalls of implied secrecy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02272390
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Expression of incompatibility by derivatives of the broad host-range inc P-1 plasmid RK2 (1979)
    Springer
    Molecular genetics and genomics 177 (1979), S. 155-161 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A segment of DNA encoding incompatibility on the inc P-1 plasmid pRK248 was identified by the analysis of deletions generated in vitro, and then cloned into several unrelated and mutually compatible plasmids. These derivatives were tested for expression of P-1 incompatibility. It was demonstrated by transformation experiments that P-1 plasmids were efficiently eliminated from an E. coli host following introduction of any one of the derivatives. However, all the derivatives were compatible with each other. The cloned segment of pRK248 DNA is itself capable of autonomous replication, without being cloned into any plasmid, if plasmid-specified gene products are provided in trans. This satellite plasmid is eliminated from the cell by the inc P-1 plasmid pRK286. The results argue against a partitioning mechanism as the basis for P-1 incompatibility but are consistent with incompatibility being the consequence of negative regulation of copy number. For the inc P-1 system, susceptibility of the plasmid to elimination, but not its ability to eliminate, requires that the P-1 replication system is active.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00267265
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    Paper (German National Licenses)
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