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  • Humans  (4)
  • SPACECRAFT DESIGN, TESTING AND PERFORMANCE  (4)
  • Launch Vehicles and Launch Operations
  • 2005-2009
  • 1990-1994  (8)
  • 1985-1989
  • 1940-1944
  • 1930-1934
  • 1990  (8)
  • 1
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    Expression of T cell antigen receptor heterodimers in a lipid-linked form (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-08-10
    Description: The interaction of the T cell receptor for antigen (TCR) with its antigen-major histocompatibility complex ligand is difficult to study because both are cell surface multimers. The TCR consists of two chains (alpha and beta) that are complexed to the five or more nonpolymorphic CD3 polypeptides. A soluble form of the TCR was engineered by replacing the carboxyl termini of alpha and beta with signal sequences from lipid-linked proteins, making them susceptible to enzymatic cleavage. In this manner, TCR heterodimers can be expressed independently of the CD3 polypeptides and in significant quantities (0.5 milligram per week). This technique seems generalizable to biochemical and structural studies of many other cell surface molecules as well.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, A Y -- Devaux, B -- Green, A -- Sagerstrom, C -- Elliott, J F -- Davis, M M -- New York, N.Y. -- Science. 1990 Aug 10;249(4969):677-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Stanford University School of Medicine, CA 94305-5402.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1696397" target="_blank"〉PubMed〈/a〉
    Keywords: Alkaline Phosphatase/genetics ; Amino Acid Sequence ; Animals ; Antigens, CD3 ; Antigens, CD55 ; Antigens, Differentiation, T-Lymphocyte/genetics ; Cell Line ; Complement Inactivator Proteins/genetics ; Female ; Humans ; Macromolecular Substances ; Membrane Proteins/genetics ; Molecular Sequence Data ; Placenta/enzymology ; Pregnancy ; Protein Sorting Signals/genetics ; Receptors, Antigen, T-Cell/*genetics ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Smokers: black and white (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-07-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schneiderman, M -- Davis, D L -- Wagener, D K -- New York, N.Y. -- Science. 1990 Jul 20;249(4966):228-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2374921" target="_blank"〉PubMed〈/a〉
    Keywords: African Americans ; European Continental Ancestry Group ; Female ; Humans ; Lung Neoplasms/mortality ; Male ; Prevalence ; Smoking/*epidemiology ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    A receptor for tumor necrosis factor defines an unusual family of cellular and viral proteins (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-05-25
    Description: Tumor necrosis factor alpha and beta (TNF-alpha and TNF-beta) bind surface receptors on a variety of cell types to mediate a wide range of immunological responses, inflammatory reactions, and anti-tumor effects. A cDNA clone encoding an integral membrane protein of 461 amino acids was isolated from a human lung fibroblast library by direct expression screening with radiolabeled TNF-alpha. The encoded receptor was also able to bind TNF-beta. The predicted cysteine-rich extracellular domain has extensive sequence similarity with five proteins, including nerve growth factor receptor and a transcriptionally active open reading frame from Shope fibroma virus, and thus defines a family of receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, C A -- Davis, T -- Anderson, D -- Solam, L -- Beckmann, M P -- Jerzy, R -- Dower, S K -- Cosman, D -- Goodwin, R G -- New York, N.Y. -- Science. 1990 May 25;248(4958):1019-23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Immunex Corporation, Seattle, WA 98101.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2160731" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Blotting, Northern ; Cloning, Molecular ; DNA/genetics ; Humans ; Membrane Proteins/genetics ; Molecular Sequence Data ; Multigene Family ; Receptors, Cell Surface/*genetics ; Receptors, Tumor Necrosis Factor ; Tumor Necrosis Factor-alpha/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    The human genome and other initiatives (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-07-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, B D -- New York, N.Y. -- Science. 1990 Jul 27;249(4967):342-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2377887" target="_blank"〉PubMed〈/a〉
    Keywords: Budgets ; *Human Genome Project/economics ; Humans ; National Institutes of Health (U.S.) ; Research Support as Topic ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Simulation of Martian dust accumulation on surfaces (1990)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Future NASA space missions include the possibility of manned landings and exploration of Mars. Environmental and operational constraints unique to Mars must be considered when selecting and designing the power system to be used on the Mars surface. A technique is described which was developed to simulate the deposition of dust on surfaces. Three kinds of dust materials were studied: aluminum oxide, basalt, and iron oxide. The apparatus was designed using the Stokes and Stokes-Cunningham law for particle fallout, with additional consideration given to particle size and shape. Characterization of the resulting dust films on silicon dioxide, polytetrafluoroethylene, indium tin oxide, diamondlike carbon, and other surfaces are discussed based on optical transmittance measurements. The results of these experiments will guide future studies which will consider processes to remove the dust from surfaces under Martian environmental conditions.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA, Goddard Space Flight Center, 16th Space Simulation Conference Confirming Spaceworthiness Into the Next Millennium; p 447-456
    Format: application/pdf
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  • 6
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    Agent-independent planning (1990)
    In:  Other Sources
    Details
    Publication Date: 2013-08-29
    Description: Viewgraphs and discussion on agent-independent planning are presented. Topics covered include: definitions; Space Station Freedom robotics environment; transition from crewmember to robots; agent-independent planning system flow; independence between plans and agents; existing testbed; benefits of approach; and directions of future research.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA, Washington, Technology for Space Station Evolution. Volume 4: Power Systems(Propulsion)Robotics; p 445-461
    Format: text
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  • 7
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    Plasma sources for spacecraft neutralization (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The principles of the operation of plasma sources for the neutralization of the surface of a spacecraft traveling in the presence of hot plasma are discussed with special attention given to the hollow-cathode-based plasma contactors. Techiques are developed that allow the calculation of the potentials and particle densities in the near environment of a hollow cathode plasma contactor in both the test tank and the LEO environment. The techniques and codes were validated by comparison of calculated and measured results.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 90-1556
    Format: text
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  • 8
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    Aeolian Removal of Dust Types from Photovoltaic Surfaces on Mars (1990)
    In:  CASI
    Details
    Publication Date: 2015-12-15
    Description: Dust elevated in local or global dust storms on the Martian surface could settle on photovoltaic (PV) surfaces and seriously hamper their performance. Using a recently developed technique to apply a uniform dust layer, PV surface materials were subjected to simulated Martian winds in an attempt to determine whether natural aeolian processes on Mars would sweep off the settled dust. Three different types of dust were used. The effects of wind velocity, angle of attack, height above the Martian surface, and surface coating material were investigated. It was found that arrays mounted on an angle of attack approaching 45 deg show the most efficient clearing. Although the angular dependence is not sharp, horizontally mounted arrays required much higher wind velocities to clear off the dust. From this test it appears that the arrays may be erected quite near the ground, but previous studies have suggested that saltation effects can be expected to cause such arrays to be covered by soil if they are set up less than about a meter from the ground. Particle size effect appear to dominate over surface chemistry in these experiments, but additional tests are required to confirm this.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA, Goddard Space Flight Center, 16th Space Simulation Conference Confirming Spaceworthiness Into the Next Millennium; p 379-396
    Format: application/pdf
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