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  • LUNAR AND PLANETARY EXPLORATION  (2)
  • neoprene  (2)
  • ASTROPHYSICS  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The fate of tributyltin toxicants in neoprene-based elastomeric antifouling coatings: 119mSn Mössbauer, 119Sn NMR and chemical studies (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 1 (1987), S. 393-401 
    Details
    ISSN: 0268-2605
    Keywords: Tributyltin elastomers ; curing process ; chemical changes ; 119mSn Mössbauer spectra ; 119Sn NMR spectra ; carbon black ; neoprene ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fate of a series of tributyltin toxicants on incorporation into cured neoprene elastomers has been studied by 119mSn Mössbauer and 119Sn NMR spectroscopic techniques, together with supporting chemical derivatization techniques. It is shown that all of the toxicants undergo chemical change during the curing process, being converted into tributyltin chloride, together with (in some cases) tributyltin stearate and a small amount of dibutyltin distearate. Possible interactions between the organotin agents and other components of the elastomer, e.g. carbon black filler, and cure accelerators such as tetramethylthiuram disulphide, have also been investigated.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590010503
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The degradation of triphenyltin biocides in neoprene-based elastomeric marine antifouling coatings: 119mSn Mössbauer and chemical speciation studies (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 3 (1989), S. 343-347 
    Details
    ISSN: 0268-2605
    Keywords: Triphenyltin ; neoprene ; elastomer ; Mössbauer ; degradation ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fate of a series of triphenyltin biocides on incorporation into neoprene elastomers has been studied by 119mSn Mössbauer spectroscopy, together with supporting chemical derivatization techniques. It is shown that triphenyltin compounds undergo drastic degradation on incorporation into neoprene, suffering cleavage of phenyl-tin bonds to give a mixture of products in which all stages of dephenylation are present, including stannic chloride. This degradation occurs not only in elastomers cured at 150°C, but also in room temperature solvent-cast samples.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590030407
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    Paper (German National Licenses)
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  • 3
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    Variable oxygen airglow on Venus as a probe of atmospheric dynamics (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: High-resolution images are presented of an oxygen airglow that arises during downwelling at an altitude of about 95 km on the nightside of Venus. Oxygen atoms are formed by photolysis of CO2 on the sunlit hemisphere and are then transported to the nightside, where they recombine during descent. The newly formed molecular oxygen emits radiation to produce the airglow. Localized, short-lived regions of emission and neighboring dark areas are observed, demonstrating the potential of such observations to constrain atmospheric dynamics at this little-studied and important altitude in the Venusian mesosphere.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Nature (ISSN 0028-0836); 359; 6395; p. 516-519.
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    The Population One Core of the Galaxy (1995)
    In:  Other Sources
    Details
    Publication Date: 2013-08-29
    Description: Spectral imaging in the near-infrared of the central parsec of the Galaxy has revealed that a population of massive young stars resides in the core of our Galaxy. We suggest it has undergone a mild starburst.
    Keywords: ASTROPHYSICS
    Type: Astronomical Society of the Pacific, Airborne Astronomy Symposium on the Galactic Ecosystem: From Gas to Stars to Dust, Volume 73; p 465-468
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  • 5
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    Near-infrared light from Venus' nightside - A spectroscopic analysis (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The near-IR spectra of the Venus nightside emission are here simulated by means of a radiative transfer code that allows for emission, absorption, and scattering by atmospheric gases and particles. An effort is made to assess the adequacy of current gas data bases in simulating Venus' nightside near-IR spectra and, within these limitations, to derive information on gas abundances below the main clouds and these clouds' optical thickness. It is in this way established that the HITRAN data base for the permitted transitions of CO2 is completely inadequate for simulating the Venus nightside near-IR emissions.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus (ISSN 0019-1035); 103; 1; p. 1-42.
    Format: text
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    NASA TECHNICAL REPORTS
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