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  • Analytical Chemistry and Spectroscopy  (2)
  • SPACE RADIATION  (1)
  • SPACECRAFT INSTRUMENTATION  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Fast atom bombardment mass spectrometry and fast atom bombardment mass spectrometry/mass spectrometry of three glutathione conjugates of acetaminophen (1987)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 14 (1987), S. 517-521 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Three glutathione conjugates of acetaminophen were characterized by fast atom bombardment/mass spectrometry (FAB/MS) and fast atom bombardment/mass spectrometry/mass spectrometry (FAB/MS/MS). The conjugates, 3-(glutathion-S-yl)acetaminophen, 3-(glutathion-S-yl)diacetaminophen and 3-(diglutathion-S-yl)diacetaminophen showed intense [MH]+ ions at m/z 457, 606 and 911, respectively. Only 3-(glutathion-S-yl)acetaminophen showed any fragmentation by FAB/MS. Structurally characteristic fragmentation was observed with all three conjugates when the [MH]+ ions were collisionally activated. The loss of the glycine (GLY) and glutamic acid (GLU) moieties indicated the presence of at least one glutathione (GSH) group. Multiple losses, some of which could only occur via cleavages in both GSH moieties, were observed with the diglutathione conjugate.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200140907
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Direct analysis of rat bile for acetaminophen and two of its conjugated metabolites via thermospray liquid chromatography/mass spectrometry (1987)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 14 (1987), S. 705-709 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bile from rats treated with acetaminophen was analyzed by direct injection onto a thermospray liquid chromatography/mass spectrometry (LC/MS) system. Two conjugated metabolites of acetaminophen were separated by the high-pressure liquid chromatographic system and analyzed by mass spectrometry. The conjugates were identified as the glutathione-acetaminophen conjugate and the glucuronide-acetaminophen conjugate by comparison of the chromatographic retention times and the mass spectra to that of the synthetic standards. No evidence of acetaminophen metabolites was observed when bile samples were subjected to direct analysis by fast atom bombardment mass spectrometry.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200141203
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    Paper (German National Licenses)
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  • 3
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    Measurements of low energy electrons and ions during long-lived solar particle events (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The stream of ions and electrons which appeared in planetary space for about eight days after an April 1979 solar flare exhibited a classic energetic storm particle (ESP) event ion pattern. Distinct populations of these electrons can be identified in association with IMF filaments, and the electron energy spectrum is well fit by a power law exponent of -2.7 during most of the event. The pitch angle distributions of the low energy electrons are found to be complex and to undergo many changes, with weak pitch angle scattering and adiabatic effects playing a role in the shaping of these distributions.
    Keywords: SPACE RADIATION
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    An experiment to measure interplanetary and solar electrons (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The paper describes an ISEE experiment designed to study interplanetary and solar electrons in the energy range between solar wind and galactic cosmic rays. The instrumentation is designed to identify and measure electron fluxes with high energy resolution and high sensitivity from approximately 2 keV to 1 MeV. Angular distributions of these electrons will also be obtained; in addition, energetic ions above 50 keV will be measured. Measurements of particle acceleration in solar flares, solar radio emission, interplanetary particles and shock wave acceleration, and low energy electron propagation are discussed. The instrumentation is described with emphasis on the semiconductor telescopes, the electrostatic analyzer, and the electronics.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: IEEE Transactions on Geoscience Electronics; GE-16; July 197
    Format: text
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    NASA TECHNICAL REPORTS
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