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  • Other Sources  (2)
  • 2010-2014  (2)
  • 2000-2004
  • 1955-1959
  • 2010  (2)
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  • 2010-2014  (2)
  • 2000-2004
  • 1955-1959
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  • 1
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    Selection of Environmentally Friendly Solvents for the Extravehicular Mobility Unit Secondary Oxygen Pack Cold Trap Testing (2010)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Freon-113(TradeMark) has been used as a chemistry lab sampling solvent at NASA/JSC for EMU (extravehicular Mobility Unit) SOP (Secondary Oxygen Pack) oxygen testing Cold Traps utilized at the USA (United Space Alliance) Houston facility. Similar testing has occurred at the HSWL (Hamilton Sundstrand Windsor Locks) facility. A NASA Executive Order bans the procurement of all ODS (ozone depleting substances), including Freon-113 by the end of 2009. In order to comply with NASA direction, HSWL began evaluating viable solvents to replace Freon-113 . The study and testing effort to find Freon-113 replacements used for Cold Trap sampling is the subject of this paper. Test results have shown HFE-7100 (a 3M fluorinated ether) to be an adequate replacement for Freon-113 as a solvent to remove and measure the non-volatile residue collected in a Cold Trap during oxygen testing. Furthermore, S-316 (a Horiba Instruments Inc. high molecular weight, non-ODS chlorofluorocarbon) was found to be an adequate replacement for Freon-113 as a solvent to reconstitute non-volatile residue removed from a Cold Trap during oxygen testing for subsequent HC (hydrocarbon) analysis via FTIR (Fourier Transform Infrared Spectroscopy).
    Keywords: Chemistry and Materials (General)
    Type: JSC-CN-19309 , JSC-CN-19982 , 40th International Conferene on Environmental Systems; Jul 11, 2010 - Jul 15, 2010; Barcelona; Spain
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Mate replacement entails a fitness cost for a socially monogamous seabird (2010)
    Springer
    In:  Naturwissenschaften, 97 (1). pp. 109-113.
    Details
    Publication Date: 2020-06-22
    Description: Studies of the selective advantages of divorce in socially monogamous bird species have unravelled extensive variation among different lineages with diverse ecologies. We quantified the reproductive correlates of mate retention, mate loss and divorce in a highly philopatric, colonially breeding biparental seabird, the Australasian gannet Morus serrator. Estimates of annual divorce rates varied between 40-43% for M. serrator and were high in comparison with both the closely related Morus bassanus and the range of divorce rates reported across monogamous avian breeding systems. Mate retention across seasons was related to consistently higher reproductive success compared with mate replacement, while divorce per se contributed significantly to lower reproductive output only in one of two breeding seasons. Prior reproductive success was not predictive of mate replacement overall or divorce in particular. These patterns are in accordance with the musical chairs hypothesis of adaptive divorce theory, which operates in systems characterised by asynchronous territorial establishment.
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
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