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  • 1
    Electronic Resource
    Electronic Resource
    A new quantum statistical evaluation method for time correlation functions (1989)
    Springer
    Journal of statistical physics 54 (1989), S. 765-795 
    Details
    ISSN: 1572-9613
    Keywords: Time correlation functions ; Liouville operators ; cluster expansion ; exchange effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Considering a system ofN identical interacting particles, which obey Fermi-Dirac or Bose-Einstein statistics, we derive new formulas for correlation functions of the type $$C(t) = \langle \Sigma _{i = 1}^N A_i (t) \Sigma _{j = 1}^N B_j \rangle $$ (whereB j is diagonal in the free-particle states) in the thermodynamic limit. Thereby we apply and extend a superoperator formalism, recently developed for the derivation of long-time tails in semiclassical systems. As an illustrative application, the Boltzmann equation value of the time-integrated correlation functionC(t) is derived in a straightforward manner. Due to exchange effects, the obtained t-matrix and the resulting scattering cross section, which occurs in the Boltzmann collision operator, are now functionals of the Fermi-Dirac or Bose-Einstein distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01019775
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  • 2
    Electronic Resource
    Electronic Resource
    Quantum-statistical kinetic equations (1989)
    Springer
    Journal of statistical physics 56 (1989), S. 175-201 
    Details
    ISSN: 1572-9613
    Keywords: Kinetic equations ; exchange effects ; renormalized cluster series ; quantum-statistical Boltzmann and Choh-Uhlenbeck equations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Considering a homogeneous normal quantum fluid consisting of identical interacting fermions or bosons, we derive an exact quantum-statistical generalized kinetic equation with a collision operator given as explicit cluster series where exchange effects are included through renormalized Liouville operators. This new result is obtained by applying a recently developed superoperator formalism (Liouville operators, cluster expansions, symmetrized projectors,P q rule, etc.) to nonequilibrium systems described by a density operatorρ(t) which obeys the von Neumann equation. By means of this formalism a factorization theorem is proven (being essential for obtaining closed equations), and partial resummations (leading to renormalized quantities) are performed. As an illustrative application, the quantum-statistical versions (including exchange effects due to Fermi-Dirac or Bose-Einstein statistics) of the homogeneous Boltzmann (binary collisions) and Choh-Uhlenbeck (triple collisions) equations are derived.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01044240
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  • 3
    Electronic Resource
    Electronic Resource
    o-Chlorchinolin (1893)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 48 (1893), S. 140-151 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.18930480119
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  • 4
    Electronic Resource
    Electronic Resource
    Electronic structure of the 1,3-diphosphetane (1995)
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 8 (1995), S. 742-746 
    Details
    ISSN: 0894-3230
    Keywords: Organic Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The equilibrium structures of cis- and trans-1,3-diphosphetane were evaluated at the RHF/6-31g** level of optimization, with MP2 electron correlation correction. Both structures are puckered, the trans isomer being slightly lower in energy than the cis isomer. The inversion barrier in 1,3-diphosphetane is lower in energy than in phosphetane.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/poc.610081107
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  • 5
    Electronic Resource
    Electronic Resource
    Electronic structure of the disilenyl radical anionDedicated to Professor O. J. Scherer on the occasion of his 60th birthday. (1994)
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 7 (1994), S. 251-255 
    Details
    ISSN: 0894-3230
    Keywords: Organic Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: According to quantum chemical calculations, the anion radical of disilene adopts a syn- or anti-pyramidal geometry. The former is not a stable entity on the electronic hypersurface and it decreases further in energy by rotation of the Si-Si bond. Energy optimization of various structural alternatives reveals for the anion radical an Si-Si bond slightly longer than a single bond. The anti geometry prefers a C2h geometry whereas the syn geometry resembles a silylene coupled with a silylene radical anion. The fragmentation of disilene into two silylene units is less exothermic for the neutral species than for the anion (radical), as examined by the ab initio calculations.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/poc.610070506
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesen Thiamin-ähnlicher Verbindungen: Homothiamin-glykol und 3-[4′-Amino-2′-methyl-pyrimidyl-(5′)-methyl]-4-methyl-5-allyl-thiazoliumchlorid-hydrochlorid (1951)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 34 (1951), S. 826-832 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Synthesen des Homothiamin-glykols (II), [3-(4′-Amino-2′-methyl-pyrimidyl-(5′)-methyl)-4-methyl-5-(β,γ-dioxypropyl)-thiazoliumchlorid-hydrochlorid], sowie diejenige des 3-(4′-Amino-2′-methyl-pyrimidyl-(5′)-methyl)-4-methyl-5-allyl-thiazoliumchlorid-hydrochlorids (VIII) werden beschrieben. Erstere Verbindung ist (nach W. H. Schopfer) für gewisse Mikroorganismen ein Antagonist des Thiamins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19510340309
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  • 7
    Electronic Resource
    Electronic Resource
    Isolierung fluoreszierender Stoffe aus Drosophila melanogaster. Vorläufige Mitteilung (1955)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 38 (1955), S. 397-401 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden die Isolierung von vier fluoreszierenden Stoffen aus Drosophila melanogaster und deren Eigenschaften kurz beschrieben.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19550380204
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  • 8
    Electronic Resource
    Electronic Resource
    Synthese von Polypeptiden XXII. Derivate des l-Phenylalanin (1907)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 357 (1907), S. 1-24 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19073570102
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