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  • ASTRONOMY  (2)
  • free triiodothyronine  (1)
  • 1
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    Unknown
    An imaging telescope for high energy gamma-ray astronomy (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Recent tests of a gamma-ray imaging telescope, which incorporated a coded aperture mask and multiwire proportional counter system produced good images of a tritium target source which was used to generate the 20 MeV protons at a proton Van de Graaff accelerator. This paper indicates what performance might be expected if a large area drift chamber were used in conjunction with a coded aperture mask. The prospects for achieving significant scientific results if such a system were flown on a variety of space vehicles are discussed.
    Keywords: ASTRONOMY
    Type: Advances in Space Research (ISSN 0273-1177); 3; 4 19; 1983
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Accelerator test of the coded aperture mask technique for gamma-ray astronomy (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A prototype gamma-ray telescope employing the coded aperture mask technique has been constructed and its response to a point source of 20 MeV gamma-rays has been measured. The point spread function is approximately a Gaussian with a standard deviation of 12 arc minutes. This resolution is consistent with the cell size of the mask used and the spatial resolution of the detector. In the context of the present experiment, the error radius of the source position (90 percent confidence level) is 6.1 arc minutes.
    Keywords: ASTRONOMY
    Type: International Cosmic Ray Conference; Jul 13, 1981 - Jul 25, 1981; Paris; France
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
    Electronic Resource
    Electronic Resource
    Measurement of free thyroid hormones in patients on long-term phenytoin therapy (1984)
    Springer
    European journal of clinical pharmacology 26 (1984), S. 633-634 
    Details
    ISSN: 1432-1041
    Keywords: phenytoin ; thyroid hormones ; thyroid function tests ; free thyroxine ; free triiodothyronine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Total thyroxine and triiodothyronine levels are often reduced in long-term phenytoin therapy, a finding at variance with the euthyroid clinical state of these subjects. We have measured free (biologically active) thyroid hormone levels in 31 patients on phenytoin therapy and have found a significant reduction in measurements of both free thyroxine and free triiodothyronine. In contrast, addition of phenytoin to normal serum in vitro resulted in an increase in free thyroxine and free triiodothyronine concentrations. The findings in vitro are consistent with displacement of thyroid hormones from thyroxine binding globulin while the reduced free hormone levels in vivo confirm that the effects of phenytoin are not confined to binding inhibition and suggest that phenytoin has induced a change in the cellular metabolism of thyroid hormones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00543499
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    Paper (German National Licenses)
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