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  • INSTRUMENTATION AND PHOTOGRAPHY  (3)
  • Life Sciences (General)  (2)
  • 04. Solid Earth::04.03. Geodesy::04.03.05. Gravity variations
  • F22
  • J24
  • 1990-1994  (5)
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  • 1
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    Effects of spaceflight in the adductor longus muscle of rats flown in the Soviet Biosatellite COSMOS 2044. A study employing neural cell adhesion molecule (N-CAM) immunocytochemistry and conventional morphological techniques (light and electron microscopy) (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The effects of spaceflight upon the "slow" muscle adductor longus were examined in rats flown in the Soviet Biosatellite COSMOS 2044. The techniques employed included standard methods for light microscopy, neural cell adhesion molecule (N-CAM) immunocytochemistry and electron microscopy. Light microscopic observations revealed myofiber atrophy and segmental necrosis accompanied by cellular infiltrates composed of macrophages, leukocytes and mononuclear cells. Neural cell adhesion molecule immunoreactivity (N-CAM-IR) was seen on the myofiber surface and in regenerating myofibers. Ultrastructural alterations included Z band streaming, disorganization of myofibrillar architecture, sarcoplasmic degradation, extensive segmental necrosis with apparent preservation of the basement membrane, degenerative phenomena of the capillary endothelium and cellular invasion of necrotic areas. Regenerating myofibers were identified by the presence of increased amounts of ribosomal aggregates and chains of polyribosomes associated with myofilaments. The principal electron microscopic changes of the neuromuscular junctions showed axon terminals with a decrease or absence of synaptic vesicles replaced by microtubules and neurofilaments, degeneration of axon terminals, vacant axonal spaces and changes suggestive of axonal sprouting. The present observations suggest that alterations such as myofibrillar disruption and necrosis, muscle regeneration and denervation and synaptic remodeling at the level of the neuromuscular junction may take place during spaceflight.
    Keywords: Life Sciences (General)
    Type: Journal of neuropathology and experimental neurology (ISSN 0022-3069); Volume 51; 4; 415-31
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    The simulation of multispectral composite satellite imagery on 8-bit color workstations (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: A technique is described which combines up to three channels of imagery into a single 8-bit composite color image. Each image controls a specific color or colors (red, green, or blue) in the resultant color composite image, allowing for improved interpretation of scene characteristics. The technique is a useful tool for the forecaster and satellite image analyst. In addition to providing the capability of displaying multichannel images on an 8-bit desktop color workstation, the technique allows sophisticated image manipulation to be performed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: In: Conference on Satellite Meteorology and Oceanography, 6th, Atlanta, GA, Jan. 5-10, 1992, Preprints (A93-36051 14-47); p. J92-J95.
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Applying an 8-bit multispectral color-composite image simulation technique to operational real-time AVHRR data (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The Geophysics Directorate's 8-bit multispectral color-composite image display technique has been installed on the Satellite Data Processing System at the German Military Geophysical Office in Traben-Trarbach, Germany. The technique simulates 24-bit full-color composites on 8-bit color workstations, combining image data from the NOAA multispectral Advanced Very High Resolution Radiometer. The real-time application of this technique to operational satellite data is discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: American Meteorological Society, Bulletin (ISSN 0003-0007); 73; 6, Ju
    Format: text
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  • 4
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    Glutamine synthetase immunoreactivity is present in oligodendroglia of various regions of the central nervous system (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Glutamine synthetase immunoreactive oligodendrocytes were identified in the cerebral cortex, cerebellum, brain stem, and spinal cord. They were mostly confined to the gray matter, particularly close to neurons and processes. The white matter showed few immunoreactive oligodendroglia. It was suggested that some type of oligodendrocytes, specially those in perineuronal location, might fulfill a functional role more akin to astrocytes than to the normally myelinating oligodendroglia.
    Keywords: Life Sciences (General)
    Type: Glia (ISSN 0894-1491); 3; 5; 335-41
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    The simulation of composite color imagery on 8-bit display devices (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A transformation method has been developed that is very successful in simulating composite imagery and shows that, in general, 8-bit simulated composite images are almost indistinguishable from true composite imagery. This technique was designed to facilitate the display and interpretation of composite satellite imagery on display devices with only 256 displayable colors. The method is suitable for the combination of two 8-bit images into a single 8-bit composite image.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: International Conference on Interactive Information and Processing Systems for Meteorology, Hydrology, and Oceanography; Jan 14, 1991 - Jan 18, 1991; New Orleans, LA; United States
    Format: text
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    NASA TECHNICAL REPORTS
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