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  • 1
    Electronic Resource
    Electronic Resource
    Projected impact of deep ocean carbon dioxide discharge on atmospheric CO2 concentrations (1994)
    Springer
    Climatic change 27 (1994), S. 225-244 
    Details
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract An evaluation of oceanic containment strategies for anthropogenic carbon dioxide is presented. Energy conservation is also addressed through an input hydrocarbon-fuel consumption function. The effectiveness of the proposed countermeasures is determined from atmospheric CO2 concentration predictions. A previous box model with a diffusive deep ocean is adapted and applied to the concept of fractional CO2 injection in 500 m deep waters. Next, the contributions of oceanic calcium carbonate sediment dissolution, and of deep seawater renewal, are included. Numerical results show that for CO2 direct removal measures to be effective, large fractions of anthropogenic carbon dioxide have to be processed. This point favors fuel pre-processing concepts. The global model also indicates that energy conservation, i.e. a hydrocarbon-fuel consumption slowdown, remains the most effective way to mitigate the greenhouse effect, because it offers mankind a substantial time delay to implement new energy production alternatives.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01093592
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Density functional calculation of the electronegativity and other related properties of atoms and ions of the principal groups of the periodic table (1984)
    Springer
    The European physical journal 319 (1984), S. 275-282 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The relation between the electronegativityχ of an atom or an ion (χ=−∂E(Z,N)/∂N) and its finite difference (Mulliken like) counterpart has been studied for the elements of the groups IA to VIIA of the Periodic Table, using an approximate Density Functional Theory. Only the valence electrons are taken into account and the effect of the ionic core is simulated by a simple empty core pseudopotential. The first derivative ∂χ/6N of the electronegativity has also been computed. The interest inχ and∂χ/∂N is illustrated by a simple model for the transfer of electronic charge in a molecule. Molecular electronegativities are then computed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412540
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Density functional theory of the chemical potential of atoms and its relation to electrostatic potentials and bonding distances (1986)
    Springer
    The European physical journal 1 (1986), S. 215-221 
    Details
    ISSN: 1434-6079
    Keywords: 31.10 ; 31.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using an approximate density functional pseudopotential method we have confirmed several relations proposed earlier by P. Politzer, R.G. Parr and D.R. Murphy (J. Chem. Phys.79, 3859 (1983)), who combined theoretical and experimental information. The main result is that the radial distancer μ where the chemical potential μ is equal to the electrostatic potential in the free atom, is of especial significance for the bonding properties of the atom.r μ is linearly related to the nonpolar covalent radius and to the Wigner-Seitz radius of the solid phase. On the other hand μ is linearly related to the electrostatic potentialV Q (r μ ) due to the net charge inside a sphere of radiusr μ in the free atom. Finally we have discovered that a linear relation exists in the free atom between (−μ)1/2 and ρ(r μ )1/3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436557
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    Paper (German National Licenses)
    Fulltext
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