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  • MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT  (1)
  • Nocdrdia  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Metabolism of o-phthalic acid by different gram-negative and gram-positive soil bacteria (1976)
    Springer
    Archives of microbiology 109 (1976), S. 109-114 
    Details
    ISSN: 1432-072X
    Keywords: Phthalic acid ; Terephthalic acid ; Nocdrdia ; Arthrobacter ; Pseudomonas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Different bacteria, isolated from soil by the enrichment method, were able to grow on phthalic acid as carbon source. Protocatechuate was identified as intermediate in phthalate metabolism. All phthalategrown bacteria oxidized phthalate and protocatechuate rapidly without having a lag-period. Benzoic acid, terephthalic acid, protocatechuic acid, salicylic acid, di- and mono-butyl phthalate were also metabolized by some of the organisms, benzoic acid being degraded via catechol and terephthalic acid via protocatechuate as intermediate. All organisms tested cleaved protocatechuate or catechol, respectively, by the “ortho” fission, when grown on phthalate, terephthalate, or benzoate as carbon source. A characterization and tentative identification of the organisms is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00425121
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    Paper (German National Licenses)
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  • 2
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    Electrochemical cell for obtaining oxygen from carbon dioxide atmospheres (1989)
    In:  CASI
    Details
    Publication Date: 2017-03-17
    Description: For manned missions to Mars to become a reality, an efficient and reliable means of obtaining oxygen from the carbon dioxide-rich atmosphere will be required. Otherwise, the high cost of transporting the oxygen needed to sustain the astronauts will severely restrict the expedition to the martian surface. Recently, the use of electrochemical devices has been explored as a means of obtaining oxygen from the carbon dioxide-rich atmosphere. In these devices, oxygen ions diffuse through solid oxide membranes, thus, separating oxygen from the other gases presented. This phenomenon has only recently been explored as a means of obtaining large quantities of oxygen from toxic atmospheres, although first observed by Walter nernst in 1899. Nernst observed that stabilized zirconia will conduct oxygen ions when an electrical potential is applied across metallic electrodes applied to the ceramic membrane. Diatomic oxygen molecules are dissociated at the positive electrode/electrolyte interface. The oxygen ions enter the ceramic body due to the ion density gradient which is produced by the electrical potential across the electrolytic membrane. Once the ions have diffused through the membrane, they reform diatomic oxygen molecules at the anode. The separation of oxygen from carbon dioxide is achieved by the combination of thermal and electrochemical processes. The thermal decomposition of carbon dioxide (at 1000 C) results in the production of carbon monoxide and oxygen by the reaction.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: USRA, NASA(USRA University Advanced Design Program Fifth Annual Summer Conference; p 43-45
    Format: text
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    NASA TECHNICAL REPORTS
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