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  • FLUID MECHANICS AND HEAT TRANSFER  (6)
  • ASTRONAUTICS (GENERAL)  (3)
  • Analytical Chemistry and Spectroscopy  (3)
  • Launch Vehicles and Launch Operations
  • 2005-2009
  • 1990-1994  (12)
  • 1991  (12)
Collection
Keywords
Publisher
Years
  • 2005-2009
  • 1990-1994  (12)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Statistical considerations in chromatographic separations (1991)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 14 (1991), S. 501-502 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240140802
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Quantification of plasma phenylethylamine by combined gas chromatography/electron capture negative ion mass spectrometry of the N-acetyl-N-pentafluorobenzoyl derivative (1991)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 20 (1991), S. 375-381 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An ultrasensitive method capable of detection and quantification of β-phenylethylamine in 1 ml of human plasma has been developed using gas chromatography/electron capture negative ion mass spectrometry. Phenylethylamine and tetra-deutero phenylethylamine internal standard in plasma were acetylated, extracted into organic solvent and then further acylated with pentafluorobenzoyl chloride. The N-acetyl-N-pentafluorobenzoyl-phenylethylamines were detected by high-resolution single ion monitoring of the molecular ions. Normal plasma levels were found to be 41.5 ± 10.7 pg ml-1, in accordance with results of a previous high-performance liquid chromatographic method.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200200608
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    1H and 13C NMR spectra of fifteen substituted isoquinolinesContribution No. 43 from Analytical and Environmental Research, Syntex Research. (1991)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 29 (1991), S. 513-517 
    Details
    ISSN: 0749-1581
    Keywords: 1H NMR ; 13C NMR ; Isoquinoline ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Detailed analyses of the 1H and 13C NMR spectra of fifteen mono- and di-substituted isoquinoline derivatives were carried out by two-dimensional 1H-1H and 1H-13C shift correlation and nuclear Overhauser effect difference techniques.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260290518
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    Paper (German National Licenses)
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  • 4
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    The linear stability of plane stagnation-point flow against general disturbances (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The linear-stability theory of plane stagnation-point flow against an infinite flat plate is re-examined. Disturbances are generalized from those of Goertler type to include other types of variations along the plate. It is shown that Hiemenz flow is linearly stable and that the Goertler-type modes are those that decay slowest. This work then rationalizes the use of such self-similar disturbances on Hiemenz flow and shows how questions of disturbance structure can be approached on other self-similar flows.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Quarterly Journal of Mechanics and Applied Mathematics (ISSN 0033-5614); 44; 135-146
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Optimal cycling between cislunar and cismartian libration points with reusable nuclear electric transfer vehicles (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A cyclical Mars exploration scenario is described which combines the use of libration points in the earth-moon and sun-Mars systems with a pair of reusable nuclear electric propulsion (NEP) transfer vehicles. In this approach, the NEP transfer vehicles are stationed at the cislunar and cismartian libration points, and involves short cislunar point escape and capture spirals. It eliminates any spiral requirements at Mars by utilizing the cismartian point as a transportation node. Chemical/aerobrake vehicles are used to transport humans between earth and the cislunar point as well as between Mars and the cismartian point.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: AAS PAPER 91-104 , In: Spaceflight mechanics 1991; Proceedings of the 1st AAS(AIAA Annual Spaceflight Mechanics Meeting, Houston, TX, Feb. 11-13, 1991. Pt. 1 (A93-17901 05-13); p. 141-161.
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Atmospheric pressure flow reactor: Gas phase chemical kinetics under tropospheric conditions without wall effects (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A flow reactor for simulating the interaction in the troposphere is set forth. A first reactant mixed with a carrier gas is delivered from a pump and flows through a duct having louvers therein. The louvers straighten out the flow, reduce turbulence and provide laminar flow discharge from the duct. A second reactant delivered from a source through a pump is input into the flowing stream, the second reactant being diffused through a plurality of small diffusion tubes to avoid disturbing the laminar flow. The commingled first and second reactants in the carrier gas are then directed along an elongated duct where the walls are spaced away from the flow of reactants to avoid wall interference, disturbance or turbulence arising from the walls. A probe connected with a measuring device can be inserted through various sampling ports in the second duct to complete measurements of the first and second reactants and the product of their reaction at selected XYZ locations relative to the flowing system.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Satellite Repair Program (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: NASA-Goddard's Satellite Repair Program counts among its major achievements the successful use of welding in servicing equipment employed in the Flight Support System (FSS) structures addressed by the the Solar Maximum Repair Mission of 1984. The FSS berthing and positioning ring will again be employed with the Space Shuttle for the anticipated upgrading of the Hubble Space Telescope; the Explorer Platform (EP) mission will also use the FSS during the planned on-orbit exchange of the EUV Explorer payload for an X-ray Timing Explorer payload. The EP, to which attention is presently given, is the first spacecraft designed to be entirely serviceable by intravehicular activity or EVA.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Welding in Space and the Construction of Space Vehicles by Welding; Sept. 24-26, 1991; New Carrollton, MD; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    The High Energy Solar Physics mission (HESP): Scientific objectives and technical description (1991)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: The High Energy Solar Physics mission offers the opportunity for major breakthroughs in the understanding of the fundamental energy release and particle acceleration processes at the core of the solar flare problem. The following subject areas are covered: the scientific objectives of HESP; what we can expect from the HESP observations; the high energy imaging spectrometer (HEISPEC); the HESP spacecraft; and budget and schedule.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA-TM-105033 , NAS 1.15:105033
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    A new parameter for predicting crossflow instability (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Instability of boundary-layer over a concave wall and a rotating disk which were thought to be essentially different in instability sources, are compared in order to investigate whether or not a single crossflow parameter can be defined. Using a newly defined crossflow parameter, prediction was attempted on a yawed cylinder boundary-layer transition. By comparing the calculation with experiment, it was found out that this parameter can document fairly well the onset condition of the crossflow instability.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: ASME and JSME Joint Fluids Engineering Conference; Jun 23, 1991 - Jun 27, 1991; Portland, OR; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Time-accurate finite difference solutions to the incompressible Navier-Stokes/energy equations (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Two new algorithms for solving coupled Navier-Stokes and energy equations are presented. The algorithms are compared with available Navier-Stokes solutions for the model problem of a driven-cavity-flow over a range of Reynolds numbers. It is noted that the algorithms represent two different implementations of the fractional step approach to the solution of the coupled Navier-Stokes and energy equations using the Boussinesq approximation.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA Computational Fluid Dynamics Conference; Jun 24, 1991 - Jun 27, 1991; Honolulu, HI; United States
    Format: text
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    NASA TECHNICAL REPORTS
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