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  • BIOSCIENCES  (1)
  • Infrared detector  (1)
  • zinc  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Zinc increases the longevity of unfertilized sea urchin eggs (1991)
    Springer
    Cellular and molecular life sciences 47 (1991), S. 734-736 
    Details
    ISSN: 1420-9071
    Keywords: Longevity ; sea urchin eggs ; zinc ; cell death ; protease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We have found that Zn2+ prevented lysis of unfertilized sea urchin eggs, and the eggs retained the ability to form fertilization membranes and to divide. SDS polyacrylamide gel electrophoresis showed that proteolysis of several proteins accompanied egg lysis, but Zn2+ inhibited this proteolysis. Therefore, Zn2+ blocks protease activity directly or indirectly and thereby prolongs the longevity of unfertilized sea urchin eggs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01958830
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Radiation effects on a GE:GA photoconductive detector (1984)
    Springer
    International journal of infrared and millimeter waves 5 (1984), S. 1499-1505 
    Details
    ISSN: 1572-9559
    Keywords: Infrared detector ; radiation effects ; curing procedure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have investigated radiation effects on a Ge:Ga photoconductive infrared detector at low photon background level of 4×108 ph cm−2s−1, using Cobalt 60 as a gamma ray source. The irradiation immediately induced spike noises which degrded NEP (short term effect), while it gradually increased responsivity (long term effect). After the removal of the gamma ray source, the spikes disappeared while the responsivity still stayed in a higher level and gradually decreased with a time scale of several hours. The responsivity-change-rate before and after the irradiation is smaller for a higher bias voltage. Finally we have made the first trial to cure the long term effect, using a flashing procedure and have found out its effectiveness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01009707
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    Paper (German National Licenses)
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  • 3
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    Secondary-electron distribution for heavy ions. (1967)
    In:  Other Sources
    Details
    Publication Date: 2011-08-12
    Description: Secondary-electron distribution for heavy ions - behavior of energy spectra
    Keywords: BIOSCIENCES
    Format: text
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    NASA TECHNICAL REPORTS
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