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  • SPACE RADIATION  (3)
  • arylsulfatase  (2)
  • 1990-1994  (2)
  • 1985-1989  (3)
  • 1930-1934
  • 1
    Electronic Resource
    Electronic Resource
    Purification and properties of arylsulfatase B from high- and low-activity mouse strains (1985)
    Springer
    Biochemical genetics 23 (1985), S. 771-786 
    Details
    ISSN: 1573-4927
    Keywords: arylsulfatase ; chondroitin-4-sulfatase ; electrophoretic variants ; house mouse ; regulation ; sulfatase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Arylsulfatase B (arylsulfate sulfohydrolase; EC 3.1.6.1) activities in C57BL/6J, SWR/J, and A/J mouse liver approximate a 5:3:1 ratio. Each enzyme was purified to apparent homogeneity, and the properties of the three purified enzymes were compared. The purified enzyme behaved as a monomer with an apparent molecular weight of 50,000. The purified enzyme catalyzed the hydrolysis ofp-nitrocatechol sulfate (pNCS), 4-methylumbelliferyl sulfate (4MUS), and chondroitin-4-sulfate (C4S) heptasaccharide. Purified SWR/J arylsulfatase B possessed a higher relative electrophoretic mobility atpH 4.0 than the A/J and C57BL/6J isozymes, and the SWR/J enzyme was more thermostable than either the C57BL/6J or the A/J enzyme. No differences were observed among the three enzymes with respect to their Michaelis constants for 4MUS and pNCS, isoelectric points, responses to inhibitors,pH optima, or electrophoretic mobilities atpH 8.3. The relativein vivo rates of synthesis of C57BL/6J, A/J, and SWR/J arylsulfatase B were comparable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00554087
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Purification and properties of arylsulfatase B from high- and low-activity mouse strains (1985)
    Springer
    Biochemical genetics 23 (1985), S. 771-786 
    Details
    ISSN: 1573-4927
    Keywords: arylsulfatase ; chondroitin-4-sulfatase ; electrophoretic variants ; house mouse ; regulation ; sulfatase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Arylsulfatase B (arylsulfate sulfohydrolase; EC 3.1.6.1) activities in C57BL/6J, SWR/J, and A/J mouse liver approximate a 5:3:1 ratio. Each enzyme was purified to apparent homogeneity, and the properties of the three purified enzymes were compared. The purified enzyme behaved as a monomer with an apparent molecular weight of 50,000. The purified enzyme catalyzed the hydrolysis ofp-nitrocatechol sulfate (pNCS), 4-methylumbelliferyl sulfate (4MUS), and chondroitin-4-sulfate (C4S) heptasaccharide. Purified SWR/J arylsulfatase B possessed a higher relative electrophoretic mobility atpH 4.0 than the A/J and C57BL/6J isozymes, and the SWR/J enzyme was more thermostable than either the C57BL/6J or the A/J enzyme. No differences were observed among the three enzymes with respect to their Michaelis constants for 4MUS and pNCS, isoelectric points, responses to inhibitors,pH optima, or electrophoretic mobilities atpH 8.3. The relativein vivo rates of synthesis of C57BL/6J, A/J, and SWR/J arylsulfatase B were comparable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02399408
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Observation of gamma ray bursts and flares by the EGRET telescope on the Compton Gamma Ray Observatory (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory has observed energetic gamma ray bursts and flares. On May 3, 1991, EGRET detected a gamma ray burst both in the energy measuring NaI (Tl) scintillator and independently in the spark chamber imaging assembly. The NaI spectra were accumulated by a special BURST mode of EGRET. The spectra were measured over a range from 1 to 200 MeV, in three sequential spectra of 1,2, and 4 seconds. During the peak of the burst, six individual gamma rays were detected in the spark chamber, allowing a determination of the burst arrival direction. The intense flares of June were also detected. A solar flare on June 4 was observed to last for several minutes and for a brief time, less than a minute, had significant emission of gamma rays exceeding 150 MeV.
    Keywords: SPACE RADIATION
    Type: In: Gamma-ray bursts; Proceedings of the Workshop, Univ. of Alabama, Huntsville, Oct. 16-18, 1991 (A93-40051 16-93); p. 38-42.
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Unknown
    Detection of high-energy gamma radiation from quasar 3C 279 by the EGRET telescope on the Compton Gamma Ray Observatory (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Intense gamma radiation has been observed from the direction of the quasar 3C 279 throughout the energy range from 30 MeV to over 5 GeV by the Energetic Gamma Ray Experiment Telescope (EGRET) during the period June 15-28, 1991. Its spectrum is well represented by a photon differential power-law exponent of 2.0 +/- 0.1, with a photon intensity above 100 MeV of (2.8 +/- 0.4) x 10 exp -6/sq cm s. For E is greater than 100 MeV, the 2-sigma upper limits were 1.0 x 10 exp -6/sq cm s in 1973 from the SAS 2 observations and 0.3 x 10 exp -6/sq cm s for the combined 1976, 1978, and 1980 COS B observations. Hence, there has been a large increase in high-energy gamma-ray intensity relative to the earlier times, as there has been in the radio, infrared, optical, and X-ray ranges. This source is the most distant and by far the most luminous gamma-ray source yet detected.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 385; L1-L4
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Unknown
    High energy gamma ray balloon instrument (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The High Energy Gamma Ray Balloon Instrument was built in part to verify certain subsystems' performance for the Energetic Gamma Ray Experiment Telescope (EGRET) instrument, the high energy telescope to be carried on the Gamma Ray Observatory. This paper describes the instrument, the performance of some subsystems, and some relevant results.
    Keywords: SPACE RADIATION
    Type: OG-9.2-12 , 19th Intern. Cosmic Ray Conf - Vol. 3; p 338-341; NASA-CP-2376-VOL-3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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