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  • 1
    Electronic Resource
    Electronic Resource
    15N NMR spectra of pyrimidine and [1,3-15N2]pyrimidine15N NMR Spectroscopy, Part XIII. For Part XII, see Ref. 1. (1985)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 23 (1985), S. 130-133 
    Details
    ISSN: 0749-1581
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fully proton-coupled 15N NMR spectra of pyrimidine with natural isotope abundance and of bis-labelled [1,3-15N2]pyrimidine, obtained using single pulse experiments, are described. The 15N and 1H spectra are analysed for 2J, 3J and 4J(NH) as well as N,N and H,H coupling constants.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260230217
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    Paper (German National Licenses)
    Fulltext
  • 2
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    The influence of ozone and aerosols on the brightness and color of the twilight zone (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The radiance and color of the twilight sky are calculated for single scattered radiation with the use of spherically symmetric models of the earth's atmosphere. Spherical geometry is used throughout the calculations with no plane parallel approximations. Refraction effects are taken into account through fine subdivision of the atmosphere into spherical shells of fixed index of refraction. Shell's law of refraction is used to calculate a direction of travel each time that a photon traverses the interface between layers. Five different models of the atmosphere were used: a pure molecular scattering atmosphere; molecular atmosphere plus ozone absorption; and three models with aerosol concentrations of 1, 3, and 10 times normal together with molecular scattering and ozone absorption. The results of the calculations are shown for various observation positions and local viewing angles in the solar plane for wavelengths in the range of 0.40 microns to 0.75 microns.
    Keywords: GEOPHYSICS
    Type: NASA-CR-133739 , REPT-7
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    The influence of ozone and aerosols on the brightness and color of the twilight sky (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The radiance and color of the twilight sky are calculated for single scattered radiation with the use of spherically symmetric models of the earth's atmosphere. Spherical geometry is used throughout the calculations with no plane-parallel approximations. Refraction effects are taken into account through fine subdivision of the atmosphere into spherical shells of fixed index of refraction. Snell's law of refraction is used to calculate a new direction of travel each time that a photon traverses the interface between layers. Five different models of the atmosphere were used: a pure molecular scattering atmosphere; molecular atmosphere plus ozone absorption; and three models with aerosol concentrations of one, three, and ten times normal together with molecular scattering and ozone absorption. The results of the calculations are shown for various observation positions and local viewing angles in the solar plane for wavelengths in the range from 0.40 to 0.75 micron.
    Keywords: GEOPHYSICS
    Type: Journal of the Atmospheric Sciences; 31; Sept
    Format: text
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    NASA TECHNICAL REPORTS
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