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  • Analytical Chemistry and Spectroscopy  (2)
  • LASERS AND MASERS  (2)
  • 1975-1979  (4)
  • 1
    Electronic Resource
    Electronic Resource
    1H NMR spectra and ring shapes of the 4,5,8-trimethyl and 4-methyl derivatives of 1-tetralone (1975)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 7 (1975), S. 187-188 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 220 MHz spectra of the title compounds are reported and values for the internal ring dihedral angle, Ψ, formed between the C-2—C-1 and C-3—C-4 bonds, calculated using the R-value method. The trimethyltetralone exists in a conformer having Ψ = 51° and the 4-methyl group in the axial position. 4-Methyl-1-tetralone exists in a conformational equilibrium where the mean value of Ψ for the conformers adopted is 56°.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270070412
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    100 MHz n.m.r. spectra and conformational analysis of some methyl and trimethyl derivatives of 1-tetralone (1976)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 8 (1976), S. 513-517 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 100 MHz spectra of 2-methyl-, 4-methyl-, 4,5,8-trimethyl- and 4,5,7-trimethyl-1-tetralones have been analysed as 8-spin systems using iterative computation. The monomethyl derivatives exist in inverting half-chair conformations, the 2-methyl group favouring the equatorial site and the 4-methyl group showing equal preference for both axial and equatorial environments. The 5-methyl substituent of the trimethyl derivatives constrains the 4-methyl group to the axial site of rings which adopt non-half-chair conformations. The n.m.r. spectrum of 3-methyl-1-tetralone is also discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270081006
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    Paper (German National Licenses)
    Fulltext
  • 3
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    An airborne laser fluorosensor for the detection of oil on water (1975)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: An airborne laser fluorosensor for the detection of oil derivatives on water has been tested. The system transmits 337 nm UV radiation at the rate of 100 pulses per second and monitors fluorescent emission at 540 nm. Daylight flight tests were made over the areas of controlled oil spills and additional reconnaissance flights were made over a 50 km stretch of the Delaware River to establish ambient oil baseline in the river. The results show that the device is capable of monitoring and mapping out extremely low level oil on water which cannot be identified by ordinary photographic method.
    Keywords: LASERS AND MASERS
    Type: The Use of Lasers for Hydrographic Studies; p 197-202
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    The use of lasers for hydrographic studies (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The utilization of remote laser sensors in water pollution detection and identification, coastal environmental monitoring, and bathymetric depth sounding, is discussed. qr
    Keywords: LASERS AND MASERS
    Type: NASA-SP-375 , Sep 12, 1973; Wallops Island, VA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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