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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 16 (1974), S. 659-673 
    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
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  • 2
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2006-10-26
    Description: Shielding properties of lead cylinder around magnetometer
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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  • 3
    Publication Date: 2006-10-26
    Description: Flaw detection by ultrasonic scanning using triangulation methods
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 4
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    In:  CASI
    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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  • 5
    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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  • 6
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    In:  Other Sources
    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
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  • 7
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    In:  Other Sources
    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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  • 8
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    In:  CASI
    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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  • 9
    Publication Date: 2019-06-28
    Description: This document describes research performed under the Radiometric Infrared Focal Plane Array Imaging System for Thermographic Applications contract. This research investigated the feasibility of using platinum silicide (PtSi) Schottky-barrier infrared focal plane arrays (IR FPAs) for NASA Langley's specific radiometric thermal imaging requirements. The initial goal of this design was to develop a high spatial resolution radiometer with an NETD of 1 percent of the temperature reading over the range of 0 to 250 C. The proposed camera design developed during this study and described in this report provides: (1) high spatial resolution (full-TV resolution); (2) high thermal dynamic range (0 to 250 C); (3) the ability to image rapid, large thermal transients utilizing electronic exposure control (commandable dynamic range of 2,500,000:1 with exposure control latency of 33 ms); (4) high uniformity (0.5 percent nonuniformity after correction); and (5) high thermal resolution (0.1 C at 25 C background and 0.5 C at 250 C background).
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-189701 , NAS 1.26:189701
    Format: application/pdf
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  • 10
    Publication Date: 2019-05-29
    Description: Instruments for measurement of spectral irradiances from solar simulators
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-68003 , NBS-8960
    Format: application/pdf
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