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  • 1
    Electronic Resource
    Electronic Resource
    Circular dichroism study of the interaction between T4 gene 32 protein and polynucleotides (1978)
    s.l. : American Chemical Society
    Biochemistry 17 (1978), S. 887-893 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00598a022
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  • 2
    Electronic Resource
    Electronic Resource
    Circular dichroism studies of the interaction of a limited hydrolysate of T4 gene 32 protein with T4 DNA and poly[d(A-T)].poly[d(A-T)] (1978)
    s.l. : American Chemical Society
    Biochemistry 17 (1978), S. 893-898 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00598a023
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  • 3
    Electronic Resource
    Electronic Resource
    Photosynthesis and fish production: Hypothetical effects of climatic change and pollution (1977)
    Springer
    Helgoland marine research 30 (1977), S. 666-672 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Overall comparisons of marine pelagic productions in different systems are speculative to a high degree. Yet they often bring to our attention processes which have not been sufficiently investigated. One such process may be the decrease of fish production due to the change in the diatom/flagellate ratio. The following hypothesis is discussed in the light of recent investigations: An increasing development of flagellates caused by some types of pollution or climatic changes not only may increase the number of trophic levels and thereby, decrease fish production, but also may cause a change in the flow of biomass from fish to ctenophores and other planktonic predators, thereby again decreasing the harvest available for human consumption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02207869
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  • 4
    Electronic Resource
    Electronic Resource
    Interspecific interaction: The analysis of complex structures in carnivorous zooplankton populations (1977)
    Springer
    Helgoland marine research 30 (1977), S. 83-91 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Linear unidirectional dependence of one population upon another is rather atypical among zooplankton species, as carnivory is not only characteristic of high trophic levels but also part of omnivory in many species of copepods. The feeding on its predatorjuveniles may be important for the survival of a copepod population, more in regard to the impact on the predator than to the nutritional benefit obtained. Such complex interrelationships are important for predictive ecosystem models. Ctenophore-copepod interrelationships have been analysed in experiments, and the results produced have been used for constructing simulation models. Details of experimentation and of modelling are described and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02207827
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  • 5
    Electronic Resource
    Electronic Resource
    The evolution of massive close binaries (1977)
    Springer
    Astrophysics and space science 50 (1977), S. 75-85 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The final state of the primaries of binary systems with initial massesM 1i=10M ⊙ to 15M ⊙ is derived from the mass of their C/O-cores. The possibility of a second stage of mass transfer towards the secondary is considered. It turns out that the critical mass for the bifurcation is about 14M ⊙: stars with larger masses in this range are the progenitors of neutron stars, while the lower mass stars are the ancestors of white dwarfs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648520
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  • 6
    Electronic Resource
    Electronic Resource
    Evolution of massive close binaries (1976)
    Springer
    Astrophysics and space science 43 (1976), S. 35-46 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The evolution of a binary system with components of 10M ⊙ and 8M ⊙ is computed through a case B of mass exchange. It is found that after the end of core helium burning, a second stage of mass transfer from the primary occurs. Carbon ignition is prohibited by the large neutrino losses in the degenerated core. The primary remnant, a 1.12M ⊙ star, ends as a white dwarf. A comparison with the 10M ⊙ single evolution is made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00640553
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  • 7
    Electronic Resource
    Electronic Resource
    Evolution of massive close binaries (1975)
    Springer
    Astrophysics and space science 35 (1975), S. 241-247 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract X-ray binaries such as Cen X-3, Cyg X-1, Vela X-1, 2U1700-37, SMC X-1, Cir X-1, with periods ranging from 2d.087 to 12d.28, are probably evolution products of massive binary systems. The massive primary starts losing mass after core hydrogen burning and undergoes a supernova explosion. The evolution of binary systems consisting of a 20M⊙ primary and secondaries of respectively 14, 10, 8 and 6M⊙ was computed from Main Sequence stage through the X-ray phase, until the second mass transfer phase. Estimates were performed for the evolution of a secondary of 4M⊙. It may be seen that some of these systems during their X-ray phase match the observed mass ratios and periods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00636994
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  • 8
    Electronic Resource
    Electronic Resource
    Evolution of massive close binaries (1975)
    Springer
    Astrophysics and space science 36 (1975), S. 219-225 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The further evolution of a massive X-ray binary consisting of a compact object and an OB supergiant is outlined. The supergiant exceeds its critical Roche lobe and a second stage of mass transfer starts. The remnant of the mass losing star — a pure helium star — develops a collapsing iron core and finally undergoes a supernova explosion. If the compact companion is a black hole the system remains bound; if the compact companion is a neutron star the system is disrupted unless an extra kick allowing an asymmetric explosion is given. Computations were performed for the massive binary 22.5M ⊙+2M ⊙. The possible final evolutionary products are: (1) a black hole and a compact object, in a binary system, (2) two run-away pulsars, (3) a binary pulsar. As final parameters for the described system the eccentricity and period for the recently discovered binary pulsar 1913+16 may be found. An orbital inclination ofi=40° may be derived. The probability for the generation of binary pulsars is very low; in most cases the system is disrupted during the supernova explosion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00681952
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  • 9
    Electronic Resource
    Electronic Resource
    The evolution of massive close binaries (1975)
    Springer
    Astrophysics and space science 38 (1975), S. 301-312 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The influence of tidal, interaction on the periods of massive X-ray binaries during the postsupernova evolution is investigated. It is assumed that after a certain time the orbit has become circular and synchronous. The tidal effects of subsequent evolutionary changes in the moment of inertia of the massive component are calculated. It is shown that, as is already suggested by Sparks and Stecher (1974), for small mass ratios and short binary periods a tidal instability may occur resulting in an accelerating inward spiral motion. Before the onset of the instability the tidal forces maintain a nearly synchronous orbit. Possibly the orbits of Cen X-3 and 3 U 1700-37 are already unstable at present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00647129
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  • 10
    Electronic Resource
    Electronic Resource
    The brightness distribution over the moon's disk at 6 cm wavelength (1976)
    Springer
    Earth, moon and planets 15 (1976), S. 317-323 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract On November 27, 1974, a map of the Moon was obtained at 6 cm wavelength with the 100-m-telescope in Effelsberg. The high angular and favourable temperature resolution allowed an interpretation of the observed brightness distribution. The dominant feature of the brightness distribution is the centre-to-limb variation, particularly noticeable in the direction of the poles. The exponentα of the commonly adopted cos α (ψ)-law, describing the temperature variation across the lunar disk, is determined asα ≃ 0.4. The North-South variation of the lunar surface temperature is estimated to be 30%; the depth of penetration (L e) of electromagnetic waves of 6 cm wavelength is found to beL e ≃ 17 m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00562243
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