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  • Other Sources  (5)
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  • 1
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    Preliminary experimental results of gas recycling subsystems except carbon dioxide concentration (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Oxygen concentration and separation is an essential factor for air recycling in a controlled ecological life support system (CELSS). Furthermore, if the value of the plant assimilatory quotient is not coincident with that of the animal respiratory quotient, the recovery of oxygen from the concentrated CO2 through chemical methods will become necessary to balance the gas contents in a CELSS. Therefore, oxygen concentration and separation equipment using Salcomine and O2 recovery equipment, such as Sabatier and Bosch reactors, were experimentally developed and tested.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: NASA, Ames Research Center, Controlled Ecological Life Support System: Regenerative Life Support Systems in Space; p 67-70
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Production of carbon monoxide by charged particle deposition. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Recent studies of electron energy deposition in CO2 and CO based upon a large set of electron impact cross sections are utilized to estimate the telluric CO directly produced by various charged-particle deposition mechanisms. The mechanisms considered are (1) lightning, (2) cloud coronal discharges, (3) background radioactivity, (4) natural electrostatic discharges, (5) photoelectrons in the ionosphere, (6) auroral electrons, (7) auroral protons, (8) cosmic rays, and (9) solar wind. 'Ball park' estimates of the global CO production by each of these mechanisms are given. Apart from mechanisms 1, 2, and 5, all CO production mechanisms are estimated to be small compared to artificial sources. If, as appears to be the case, the hot oxygen atoms and ions and other atomic species immediately produced by these three charged-particle deposition mechanisms react rapidly with CO2 to produce CO, these mechanisms can readily lead to CO production levels in the multimegaton-per-year range.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 78; Aug. 20
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Electron impact excitation cross sections and energy degradation in CO. (1972)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: We determine a comprehensive set of electron impact cross sections for carbon monoxide mainly on the basis of recently accumulated data on electron impact spectra, the Born approximation at high energies, and simple rules developed earlier to take into account low-energy effects. The calculation of the complete energy degradation of electrons incident on CO is carried out with these input cross sections, and the efficiencies associated with possible loss channels are presented.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 77; Sept. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Electron energy deposition in CO2. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Semiempirical cross sections of Strickland and Green (1969) are compared with and supplemented by more recent data. The composite set is used in the energy degradation calculation of electrons with emphasis on energies below 100 ev. Good agreements are obtained with accepted values of the loss function and the average electron volts per ion pair at high energies. Efficiencies associated with various loss channels are obtained. The relationship with the recent Mariner UV data is discussed.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 77; Sept. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Dynamic light scattering analysis of solutions from which lysozyme crystals grow (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The variation of the friction factor was measured by photon correlation spectroscopy during isothermal growth of chicken egg white lysozyme crystals. It was observed to initially increase to a maximum as crystals formed, and then to decrease to a constant value. The change in the friction factors was measured as a function of temperature at concentrations of lysozyme varying from one sufficiently low that molecular interactions were undetectable to concentrations near those at which crystals grow in solutions, in all cases the ionic strength was below that required for crystallization.
    Keywords: MATERIALS PROCESSING
    Type: Journal of Crystal Growth (ISSN 0022-0248); 122; 4-Jan; p. 41-49.
    Format: text
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