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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of blackcurrant stem lignin
    Amsterdam : Elsevier
    Phytochemistry 37 (1994), S. 1703-1706 
    Details
    ISSN: 0031-9422
    Keywords: Grossulariaceae ; Ribes nigrum ; hardwood ; lignin ; pulp. ; stem
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)89596-5
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Characterization of blackcurrant stem lignin
    Amsterdam : Elsevier
    Phytochemistry 37 (1994), S. 1703-1706 
    Details
    ISSN: 0031-9422
    Keywords: Grossulariaceae ; Ribes nigrum ; hardwood ; lignin ; pulp. ; stem
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0031-9422(00)89596-5
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Sharp slender cones in near-free-molecule hypersonic flow (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Shock tunnel drag measurements on sharp slender cones in near free molecule hypersonic flow in air and He
    Keywords: AERODYNAMICS
    Type: ; YAL SOCIETY (
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Sphere drag in near-free-molecule hypersonic flow (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Spheres drag coefficient at hypersonic Mach numbers for near free molecular flow
    Keywords: AERODYNAMICS
    Type: ; UGREVUE(
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Emittance of RSI Coatings Determined from Radiation Measurements in Arc Jet Tests (1973)
    In:  CASI
    Details
    Publication Date: 2014-09-09
    Description: Simultaneous measurements were made on three surface insulation coatings for total surface radiation and radiation at discrete wavelengths between 0.88 and 4.5 microns. The mullite coating radiated all the applied heat at convective heat rates of 204 and 295 kw/sq m. Radiation from the ceramic mullite fiber coating was 170 kw/sq m at a heat rate of 454 kw/sq m. Effective total emissivity and spectral emissivity values were evaluated; all three coatings were significantly non-grey. Effective total emissivity values were 0.79 for mullite, 0.50 for ceramic mullite fiber, and 0.78 for silica composite.
    Keywords: MATERIALS, NONMETALLIC
    Type: Symp. on Reusable Surface Insulation for Space Shuttle, Vol. 3; p 1291-1311
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Cyclic arc plasma tests of RSI materials using a preheater (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The results of a test program are reported in which a preheater was used with an arc plasma stream to study the thermal response of samples of candidate reusable surface insulation materials for the space shuttle. The preheater simulated the shuttle temperature history during the first and last portions of the test cycle, which could not be simulated by the air arc plasma flow. Pre- and post-test data taken for each of the materials included magnified views, optical properties, and chemical analyses. The test results indicate that the mullite base samples experience higher surface temperatures than the other materials at heating rates greater than 225 kw/sq m. The ceramic fibrous mullite and silica coatings show noncatalytic wall behavior. Internal temperature response data for the materials are compared and correlated with analytical predictions.
    Keywords: MATERIALS, NONMETALLIC
    Type: Symp. on Reusable Surface Insulation for Space Shuttle, Vol. 2; p 559-589
    Format: application/pdf
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  • 7
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    Heating distribution comparison between asymmetric and symmetric blunt cones (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: An experiment was performed to compare the heating distribution between symmetric and asymmetric large-angle blunt cones, with cone angles of 100, 120, and 140 deg. These hot-wall data were obtained from models made from typical thermal protection insulation for proposed aeroassisted orbital transfer vehicles. Experimental data are compared with predictions using a boundary-layer integral matrix procedure with kinetics to determine how well the heating distribution over an asymmetric cone could be approximated using axisymmetric solutions for a cone and spherical segment. In addition, a relationship between the stagnation-point heat-transfer rate and the bow-shock standoff distance for these cones is discussed. The heat-distribution data from the symmetric and asymmetric cones were very similar. Numerical results compared well with the measured wall temperatures at the stagnation point but slightly underpredicted them over the conical portion of the models.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 86-1307
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Silica Reusable Surface Insulation Improvement Research (1973)
    In:  CASI
    Details
    Publication Date: 2014-09-09
    Description: Fiber characterization, fabrication processes, physical properties, and thermal responses are investigated to improve silica reusable surface insulation tiles. Criteria for fiber selection on the basis of chemical composition, shrinkage, and devitrification have been defined and a simple process for fabricating silica surface insulation materials has been developed that produces only 5% shrinkage and no devitrification of tiles at 1533 K in ten hours. Anisotropic tile with improved weak direction strength has been fabricated using conventional molding techniques.
    Keywords: MATERIALS, NONMETALLIC
    Type: Symp. on Reusable Surface Insulation for Space Shuttle, Vol. 1; p 155-196
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Chemical and morphological changes of reusable surface insulation coatings as a function of convectively heated cyclic testing (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The effects of convective heating upon reusable surface insulation coatings were studied utilizing scanning electron microscopy, X-ray fluorescence, and X-ray diffraction. Samples of coated silica, mullite, and ceramic mullite fiber were cycled in an arc plasma stream up to 15 times for 15 minutes per cycle at surface temperatures simulating those on the space shuttle vehicle. The surfaces of ceramic mullite fiber and mullite coatings were roughened substantially by the convectively heated environment while the silica was significantly smoothed after testing. Scanning electron microscopy also showed surface cracking of varying degrees in all of the coatings. The surface chemistry of the coatings as examined by X-ray fluorescence revealed that significant changes in composition were occurring during cycling, particularly within the mullite coating.
    Keywords: MATERIALS, NONMETALLIC
    Type: Symp. on Reusable Surface Insulation for Space Shuttle, Vol. 2; p 851-894
    Format: application/pdf
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  • 10
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    Effect of variable surface catalysis on heating near the stagnation point of a blunt body (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: This paper describes arc-jet data obtained on the performance of glass coated thermal protection systems in a convectively heated environment. These data confirm earlier flight and arc-jet data that show an increased surface catalysis with salt contamination and a decreased surface catalysis near the softening point temperature of the glass. In addition, surface temperature distributions along sphere-cones with abruptly changing surface catalysis were measured near the stagnation point and compared well with computations using a reacting boundary layer code.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 85-0248
    Format: text
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