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  • 1
    Series available for loan
    Series available for loan
    Bibliography of the geology of the western phosphate field (1954)
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Details Availability
    Call number: SR 90.0001(1018)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: III, 89 S.
    Series Statement: U.S. Geological Survey bulletin 1018
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical Modification and Site-Directed Mutagenesis Studies of Rat 3-Hydroxyisobutyrate Dehydrogenase (1995)
    s.l. : American Chemical Society
    Biochemistry 34 (1995), S. 4231-4237 
    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/bi00013a012
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  • 3
    Electronic Resource
    Electronic Resource
    Gm-3.2, A new granulocyte/macrophage alloantigen (1985)
    Springer
    Immunogenetics 21 (1985), S. 61-70 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A monoclonal antibody defining a unique mouse neutrophil cell-surface antigen, Gm-3.2, is described. Gm-3.2 is found on all neutrophils in peritoneal exudates and in bone marrow, and is also present on macrophages activated by thioglycolate but is absent from lymphoid, kidney, liver, heart, and red cells. Gm-3.2 is a differentiation antigen of myeloid cells, as granulocyte/macrophage colony-forming cells are Gm-3.2− while mature neutrophils are Gm-3.2+. Strain distribution pattern analysis shows linkage of the Gm-3 locus to the Ly-4, B2m, H-3 complex on chromosome 2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372242
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  • 4
    Electronic Resource
    Electronic Resource
    Ground state densities from electron propagators: Optimized Thomas–Fermi approximation for short wavelength modes (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 6687-6696 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Electron densities obtained from a ground state path integral approach to density functional theory using a primitive Monte Carlo method display large statistical uncertainties when short wavelength fluctuations of the paths are considered directly. An optimized Thomas–Fermi approximation is developed to eliminate these degrees of freedom in a systematic and physically motivated fashion. Beyond improving the precision of the numerical results, this theoretical development permits a simple qualitative discussion of how the calculation pushes electron density into tunneling regions by iteratively renormalizing the Fermi wavelength appropriate to the remaining integrations which involve only long wavelength coordinates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458304
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  • 5
    Electronic Resource
    Electronic Resource
    Vibrational circular dichroism and electric-field shielding tensors: A new physical interpretation based on nonlocal susceptibility densities (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 6995-7002 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Motion of nuclei within a molecule induces a magnetic moment me in the electronic charge distribution, giving a nonzero electronic contribution to the magnetic transition dipole that produces vibrational circular dichroism. In this paper, we develop a new susceptibility density theory for the induced magnetic moment. The theory is based on the response of the electrons to changes in the nuclear Coulomb field, due to shifts in nuclear positions. The electronic response to these changes depends on the same susceptibility densities that determine response to external fields. Our analysis suggests a new physical picture of vibrational circular dichroism. It yields an equation for the density of the induced electronic magnetic moment within a molecule; it also yields a new relation connecting the electric-field shielding at nucleus I of a molecule in an applied magnetic field of frequency ω to the derivative of me with respect to the velocity of nucleus I, regarded as a parameter in the electronic wave function. Within our theory, the derivative of me with respect to nuclear velocity separates into quantum-mechanical and classical components in close analogy with the Hellmann–Feynman theorem for forces on nuclei. In matrix-element form, results from our theory are identical to those obtained with nonadiabatic perturbation theory, to leading order. In general, the leading nonadiabatic corrections to electronic properties are determined directly by the electrons' response to the changes in the nuclear Coulomb field, when the nuclei move.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.460233
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  • 6
    Electronic Resource
    Electronic Resource
    On the resolution of an apparent conflict in the relation between position and momentum operators within the Hartree–Fock approximation (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 5856-5857 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Time-dependent Hartree–Fock theory leads to two apparently quite different expressions relating matrix elements of the electronic position and momentum operators, depending upon whether a single-particle or a many-particle matrix element is used as the starting point. The two expressions are shown to be equivalent, in a complete Hartree–Fock basis set, by means of explicit use of the commutation properties of r with V and J on the one hand, and self-consistency relations and Brillouin's theorem on the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457539
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  • 7
    Electronic Resource
    Electronic Resource
    Statistical theory of electron densities (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 1818-1823 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: An optimized Thomas–Fermi theory is proposed which retains the simplicity of the original theory and is a suitable reference theory for Monte Carlo density functional treatments of condensed materials. The key ingredient of the optimized theory is a neighborhood sampled potential which contains effects of the inhomogeneities in the one-electron potential. In contrast to the traditional Thomas–Fermi approach, the optimized theory predicts a finite electron density in the vicinity of a nucleus. Consideration of the example of an ideal electron gas subject to a central Coulomb field indicates that implementation of the approach is straightforward. The optimized theory is found to fail completely when a classically forbidden region is approached. However, these circumstances are not of primary interest for calculations of interatomic forces. It is shown how the energy functional of the density may be constructed by integration of a generalized Hellmann–Feynman relation. This generalized Hellmann–Feynman relation proves to be equivalent to the variational principle of density functional quantum mechanics, and, therefore, the present density theory can be viewed as a variational consequence of the constructed energy functional.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454105
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  • 8
    Electronic Resource
    Electronic Resource
    Simple interpretation of dephasing in absorption and resonance Raman theory (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 3744-3748 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: It is shown that the effects of "pure dephasing'' in vibronic absorption and resonance Raman scattering may be simply derived by beginning with the Fermi Golden Rule. The medium introduces electronic dephasing by modulating the electronic energy gap of the molecule. In both absorption and Raman scattering the cross section depends upon a medium correlation function φ(t) whose form is identical to one that appears in vibrational relaxation theory. Explicit equations for the resonance Raman cross section are derived for an exponential medium correlation function. Also, φ(t) is derived for medium models which consist of a collection of classical and quantum mechanical oscillators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450947
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  • 9
    Electronic Resource
    Electronic Resource
    On the manifestation of retardation effects in diagonally polarized light scattering (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 658-663 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: It is shown, as an exact consequence of the nonrelativistic quantum theory of light scattering, that the dependence of differential cross section on the incident and scattered wave vectors and polarization vectors is the same as it is in the Kramers–Heisenberg approximate result. Combining this result with previous work, we conclude that in systems of randomly oriented scattering molecules (with no external fields) there is a necessary condition for the diagonally polarized elements of the Perrin matrix 〈Pi3〉 and 〈P3i〉 (with i=1,2,4) to be nonzero. The condition is that the molecule be radiatively and/or nonradiatively damped, and/or that retarded multiple scattering is occurring within the molecule. To show observable retardation effects, molecular size need only be comparable to wavelength. The retarded component of the 〈P3i〉 elements has a frequency prefactor of ω6, in contrast to the total intensity prefactor of ω4. Therefore, the bluest possible laser should be used for their measurement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448541
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  • 10
    Electronic Resource
    Electronic Resource
    A simple electron gas treatment of the magnetic susceptibility tensor of the lowest 3Σ+u state of H2 (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 5018-5022 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The incremental diamagnetic susceptibility tensor of the 3Σ+u state of H2 is obtained using an electron gas theory. This state of the hydrogen molecule is a model for the ground state of a system of interacting closed shell species. Because the energy functional is a gauge independent functional of the electron density, there is no separation of the susceptibility tensor into paramagnetic and diamagnetic portions. The results agree in sign, but not magnitude, with a simple valence bond calculation using London orbitals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448675
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