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  • 1
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    Unknown
    Development and testing of dry chemicals in advanced extinguishing systems for jet engine nacelle fires (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The effectiveness of dry chemical in extinguishing and delaying reignition of fires resulting from hydrocarbon fuel leaking onto heated surfaces such as can occur in jet engine nacelles is studied. The commercial fire extinguishant dry chemical tried are sodium and potassium bicarbonate, carbonate, chloride, carbamate (Monnex), metal halogen, and metal hydroxycarbonate compounds. Synthetic and preparative procedures for new materials developed, a new concept of fire control by dry chemical agents, descriptions of experiment assemblages to test dry chemical fire extinguishant efficiencies in controlling fuel fires initiated by hot surfaces, comparative testing data for more than 25 chemical systems in a 'static' assemblage with no air flow across the heated surface, and similar comparative data for more than ten compounds in a dynamic system with air flows up to 350 ft/sec are presented.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: NASA-CR-165011
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Chelate-modified polymers for atmospheric gas chromatography (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Chromatographic materials were developed to serve as the stationary phase of columns used in the separation of atmospheric gases. These materials consist of a crosslinked porous polymer matrix, e.g., a divinylbenzene polymer, into which has been embedded an inorganic complexed ion such as N,N'-ethylene-bis-(acetylacetoniminato)-cobalt (2). Organic nitrogenous bases, such as pyridine, may be incorporated into the chelate polymer complexes to increase their chromatographic utility. With such materials, the process of gas chromatography is greatly simplified, especially in terms of time and quantity of material needed for a gas separation.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Fire extinguishant materials (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Fire extinguishant composition comprising a mixture of a finely divided aluminum compound and alkali metal, stannous or plumbous halide is provided. Aluminum compound may be aluminum hydroxide, alumina or boehmite but preferably it is an alkali metal dawsonite. The metal halide may be an alkali metal, e.g. potassium iodide, bromide or chloride or stannous or plumbous iodide, bromide or chloride. Potassium iodide is preferred.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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