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  • 1
    Electronic Resource
    Electronic Resource
    Solvent extraction studies using phosphonic acid monoesters (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 149 (1991), S. 345-349 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The extraction of radioactive152–154Eu by ethyl hydrogen benzyl phosphonate (HEBP) and ethyl hydrogen benzoyl phosphonate (HEBOP) in n-hexane from an aqueous solution of ionic strength 0.1M (Na+, HClO4) has been investigated at different temperatures and the thermodynamic functions evaluated. HEBOP was found to be more efficient than HEBP as extractant. In addition, the stability constant of the extracted complexes were determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02062063
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  • 2
    Electronic Resource
    Electronic Resource
    Solvent extraction studies using phosphonic acid monoesters (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 149 (1991), S. 351-354 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The extraction of radioactive60Co by ethyl hydrogen benzoyl phosphonate (HEBOP) has been investigated. Different parameters that may effect this extraction such as the change in pH and [HEBOP] were studied. Extraction was carried out in three organic solvents. In addition, the equilibrium constants were determined at different temperatures and the thermodynamic parameters for such extraction process were calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02062064
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  • 3
    Electronic Resource
    Electronic Resource
    Thermodynamics of the extraction of europium(III) radiotracer by benzyl-phosphonic acid monoester (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 134 (1989), S. 415-421 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The extraction of Eu3+ from perchloric acid by ethyl hydrogen benzyl phosphonate (HEBP) dissolved in a series of organic diluents, has been studied at different temperatures. From the variation of the distribution ratio with temperature, the thermodynamic functions ΔH, ΔS and ΔG have been determined. The meaning of the experimentally obtained thermodynamic quantities is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02278278
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  • 4
    Electronic Resource
    Electronic Resource
    Radiation transfer for an inhomogeneous half-space with an internal source (1984)
    Springer
    Astrophysics and space science 100 (1984), S. 381-389 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The emergent flux for radiation transfer in an inhomogeneous half-space with internal source is obtained in terms of the source-function of the diffuse reflection problem. Modified Eddington method is used to calculate the diffuse problem and, hence, the emergent flux. Numerical result are given and compared with previous work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651613
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  • 5
    Electronic Resource
    Electronic Resource
    Padé approximant calculations for the number of scattering during particle diffusion (1984)
    Springer
    Astrophysics and space science 100 (1984), S. 53-64 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mean number of particle scattering in a semi-infinite and finite slab for arbitrary energy sources are calculated by Padé approximants. Uniform source distribution is considered for the finite slab. For the semi-infinite medium we calculatethe number of particles due external radiation and at a particular point in the medium. Numerical calculations and comparisons were performed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651585
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  • 6
    Electronic Resource
    Electronic Resource
    Padé approximants for radiative transfer in inhomogeneous medium (1983)
    Springer
    Astrophysics and space science 91 (1983), S. 125-131 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Padé approximants is used to estimate the albedo for an inhomogeneous semi-infinite medium. The single-scattering albedo is assumed to fall off exponentially with optical depth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650219
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  • 7
    Electronic Resource
    Electronic Resource
    Particle transfer in multiregions (1983)
    Springer
    Astrophysics and space science 96 (1983), S. 233-238 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Asymptotic calculations for reflection and transmission coefficients for particles incident on an inhomogeneous plane parallel medium are performed. The medium is assumed to consist of several different optically thick homogeneous layers. Functional relations between the reflection and transmission coefficients for the sublayers are obtained. The invariant embedding concepts are used to calculate the albedo for sublayers. Numerical calculations and comparisons are performed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651667
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  • 8
    Electronic Resource
    Electronic Resource
    Diffuse reflection and transmission of radiation for Rayleigh phase function (1983)
    Springer
    Astrophysics and space science 89 (1983), S. 345-354 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Diffuse reflection and transmission coefficients in a plane parallel medium are calculated for a Rayleigh phase-function averaged over polarization and Rayleigh polarized phase-function. This is calculated by imbedding the finite medium into a semi-infinite scattering and absorbing medium. Numerical calculations for semi-infinite albedo are compared with Pomraning results. The albedos for finite medium are calculated via the imbedding equations which converge for large τ to the value of semi-infinite medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00655987
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  • 9
    Electronic Resource
    Electronic Resource
    The composition and stability of the Germanium phenylfluoronate complex (1979)
    Springer
    Microchimica acta 71 (1979), S. 175-182 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Germaniumphenylfluoronat entsteht als orange gefärbter Komplex in Lösung bei pH 2,5–3,4. Seine Zusammensetzung wurde durch verschiedene Methoden untersucht, wobei sich ein Verhältnis von 1∶2 und eine Stabilitätskonstante von 6,80·102 ergaben. Der Komplex wurde in festem Zustand hergestellt und auf verschiedene Weise (chemisch-analytisch, IR-spektroskopisch, differential-thermoanalytisch) untersucht. Dabei ergab sich die Formel (C19H11O5)2Ge·4H2O. Das Metall ist an die C=O- und an die OH-Gruppe gebunden.
    Notes: Summary Germanium phenylfluoronate is formed in solution as an orange coloured complex at pH 2.5–3.4. Its composition has been studied by continuous variation, slope ratio and mole ratio methods. The results indicate that the complex formed is of the 1∶2 type, and its stability constant is 6.80×102. The solid complex was prepared and examined by various methods including chemical analysis, infrared spectroscopy and differential thermal analysis. It conforms to the formula (C19H11O5)2Ge·4H2O and the bonding to the metal was found to be at the C=O and OH groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01196403
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  • 10
    Electronic Resource
    Electronic Resource
    Energy albedo for multiregion slabs (1984)
    Springer
    Astrophysics and space science 107 (1984), S. 11-18 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An asymptotic solution for the equation of radiative transfer in an inhomogeneous medium was obtained on the basis of the corresponding solutions for homogeneous sub-layers in the slowing down region. Function relations between the reflection and transmission coefficients for the whole slab and those of the sublayers are given. The invariant embedding concepts are used to get the reflection and transmission coefficients for the sub-layers. We assumed different models for the slowing-down kernels. Laplace transform was used to transform the Boltzmann equation to one velocity approximation with re-scaled mean-free path and single-scattering albedo. Numerical results are given for energy albedo as a function of the mass number of the host medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00649611
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