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  • Lunar and Planetary Science and Exploration  (23)
  • INSTRUMENTATION AND PHOTOGRAPHY  (14)
  • Biochemistry and Biotechnology
  • 1
    Electronic Resource
    Electronic Resource
    Optimization of the release of undegraded material extracted from cells by ultrasound (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 16 (1974), S. 659-673 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The time course of release of intact labile material from cells by cavitating ultrasound is examined. Curves are presented which show the yield of intact subcellular components obtainable from cells as a function of sonication time for various values of the ratio of inactivation rate to release rate. The general cases where inactivation of released product is concentration dependent (chemical) and concentration independent (mechanical) are considered.For a flow system the time of attainment of equilibrium concentration of active product is analyzed as a function of flow rate, release rate, inactivation rate, and volume of chamber. Curves of optimal yields to be expected for batch and flow systems are presented. It is shown that sonochemical inactivation can be made negligible by sonication of high cell concentration suspensions.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260160508
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Surface composition of Kuiper belt object 1993SC (1997)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The 1.42- to 2.40-micrometer spectrum of Kuiper belt object 1993SC was measured at the Keck Observatory in October 1996. It shows a strongly red continuum reflectance and several prominent infrared absorption features. The strongest absorptions in 1993SC's spectrum occur near 1.62, 1.79, 1.95, 2.20, and 2.32 micrometers in wavelength. Features near the same wavelengths in the spectra of Pluto and Neptune's satellite Triton are due to CH4 on their surfaces, suggesting the presence of a simple hydrocarbon ice such as CH4, C2H6, C2H4, or C2H2 on 1993SC. In addition, the red continuum reflectance of 1993SC suggests the presence of more complex hydrocarbons.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Science (ISSN 0036-8075); Volume 276; 5314; 937-9
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Identification of water ice on the Centaur 1997 CU26 (1998)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Spectra of the Centaur 1997 CU26 were obtained at the Keck Observatory on 27 October 1997 (universal time). The data show strong absorptions at 1.52 and 2.03 micrometers attributable to water ice on the surface of 1997 CU26. The reflectance spectrum of 1997 CU26 is matched by the spectrum of a mixture of low-temperature, particulate water ice and spectrally featureless but otherwise red-colored material. Water ice dominates the spectrum of 1997 CU26, whereas methane or methane-like hydrocarbons apparently dominate the spectrum of the Kuiper belt object 1993 SC, perhaps indicating different origins, thermal histories, or both for these two objects.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Science (ISSN 0036-8075); Volume 280; 5368; 1430-2
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Stable field environment for magnetometer testing (1965)
    In:  CASI
    Details
    Publication Date: 2006-10-26
    Description: Shielding properties of lead cylinder around magnetometer
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Automated ultrasonic scanning by triangulation methods - The Dickinson system (1966)
    In:  CASI
    Details
    Publication Date: 2006-10-26
    Description: Flaw detection by ultrasonic scanning using triangulation methods
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Leakage detection and measurement (1965)
    In:  CASI
    Details
    Publication Date: 2006-10-26
    Description: Hydrogen and oxygen sensors to detect explosive forming gases leaking from liquid propellant systems
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Calculation of fringe visibility in a laser- illuminated interferometer. (1967)
    In:  Other Sources
    Details
    Publication Date: 2011-08-11
    Description: Fringe visibility dependence on path length difference in laser illuminated two-beam interferometer
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: OPTICAL SOCIETY OF AMERICA
    Format: text
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  • 8
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    Advanced radiographic imaging techniques. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Examination of the nature and operational constraints of conventional X-radiographic and neutron imaging methods, providing a foundation for a discussion of advanced radiographic imaging systems. Two types of solid-state image amplifiers designed to image X rays are described. Operational theory, panel construction, and performance characteristics are discussed. A closed-circuit television system for imaging neutrons is then described and the system design, operational theory, and performance characteristics are outlined. Emphasis is placed on a description of the advantages of these imaging systems over conventional methods.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Device for producing very low magnetic fields. (1968)
    In:  Other Sources
    Details
    Publication Date: 2011-08-12
    Description: Reduced magnetic field obtained by using superconducting lead foil sack
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; ACE(
    Format: text
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  • 10
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    Seeding materials: Health and safety considerations (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The choice of a proper seeding material for laser velocimeters must include health and safety considerations. Failure to do so can lead to catastrophic results. All materials are toxic, and laser velocimeter seeding materials are no exception. Toxicity may be considered an inherent property of a given material. The manifestation of that property or the physiological response to the material is dependent on dose and exposure conditions. An approximate physiological classification of toxicity is given in tablular form. Toxicity in some situations is not necessarily the most restrictive factor in selection of materials. It is also very important to consider how the material is used so that actual exposure to the material in a damaging form can result. For example, nickel and cadmium are both extremely toxic as systemic poisons and in the case of nickel as a carcinogen. Seeding materials are dispersed in air under conditions that favor personnel exposure. Dispersal equipment is frequently if not normally manned, and personnel are often required to make frequent adjustments to assure proper operations.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Wind Tunnel Seeding Systems for Laser Velocimeters; p 211-219
    Format: application/pdf
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