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  • Articles: DFG German National Licenses  (2)
  • 1975-1979  (1)
  • 1970-1974  (1)
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  • Articles: DFG German National Licenses  (2)
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  • 1
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. The alkaloids of reed canarygrass respond to changes in soil moisture and nitrogen fertility. Gramine and hordenine levels increased under field conditions of moisture deprivation and this effect was enchanced when nitrogen fertilizer was applied. The level of 5-methoxy-N-methyltryptamine was affected mainly by the nitrogen amendment. Exceptional alkaloid levels in reed canarygrass are interpreted in relation to climatic and plant osmotic parameters. Improved TLC fluorescence scanning procedures are presented for quantifying reed canarygrass alkaloids.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 20 (1971), S. 282-291 
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Resultate von ab initio-Rechnungen für das CH3-Radical für die tiefliegenden Konfigurationen werden angegeben. Die Konfiguration des tiefsten 2 E′-Zustandes resultiert allerdings bei planarer Geometrie nicht aus der Elektronen-Grundkonfiguration. Letztere ist zwar bei fast pyramidaler Struktur wesentlich tiefer, schneidet aber erstere im Verlauf der Verzerrung des Moleküls. In dieser Region ist die HF-Näherung nicht mehr gültig. — Die anderen tiefliegenden Konfigurationen [2A″2 (Grund-Konfiguration), 2 A′1 (3s Rydberg) und 1 A′1 (Ion)] verhalten sich normal.
    Notes: Abstract Ab initio LCAO-MO-SCF calculations have been performed on assorted low-lying configurations of the CH3 radical to assess the adequacy of the Hartree-Fock treatment of this species. The 2 E′ configuration of lowest energy in the planar ground state equilibrium geometry is shown not to be the valence configuration. Near its (pyramidal) equilibrium geometry the 2 E′ valence configuration is well below the other 2 E′ configuration. The two 2 E′ configurations must, then, cross as the molecule is distorted. In this region the Hartree-Fock formation is unable to describe 2 E′ states. The other low-lying states [2 A′'2 (ground), 2 A′1 (3s Rydberg), and 1 A′1 (ion)] and the 2 E′ states in the pyramidal geometry are satisfactorily determined within the Hartree-Fock formalism.
    Type of Medium: Electronic Resource
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