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  • 1
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    The MARSIS Science Mission (2005)
    In:  CASI
    Details
    Publication Date: 2005-04-25
    Description: The Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) is an integral component of the Mars Express mission. A low-frequency sounding radar was carried on the Russian Mars 96 spacecraft, and in keeping with the concept of re-flying the science experiments lost on that mission, a call for a radar sounder was part of the Announcement of Opportunity for the 2003 ESA Mars Express mission. MARSIS is the only totally new instrument on Mars Express. The instrument was developed, delivered and operated as a joint effort between the Italian Space Agency and the U.S space agency NASA. The MARSIS science mission has been delayed due to concerns about the safety of the antenna deployment. As a testament to the importance placed on the
    Keywords: Instrumentation and Photography
    Type: Workshop on Radar Investigations of Planetary and Terrestrial Environments; 68; LPI-Contrib-1231
    Format: text
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  • 2
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    A Low Frequency Radio and Radar Instrument to Explore Jupiter's Icy Moons (2003)
    In:  CASI
    Details
    Publication Date: 2004-10-30
    Description: The addition of a comprehensive wave investigation to the Jupiter Icy Moons Orbiter (JIMO) science payload will provide a broad range of information on the icy moons of Jupiter including the detection of subsurface liquid oceans; mapping of their ionospheres; their interaction with the magnetospheric environment; and on the Jovian magnetosphere. These measurements are obtained through the use of both passive and active (sounding) means over broad frequency ranges. The frequency range of interest extends from less than 1 Hz to 40 MHz for passive measurements, from approximately 1 kHz to a few MHz for magnetospheric and ionospheric sounding, and between 1 and approximately 10 MHz for subsurface radar sounding. An instrument to detect subsurface radar sounding, magnetospheric interactions, and ionospheric sounding is discussed.
    Keywords: Instrumentation and Photography
    Type: Forum on Concepts and Approaches for Jupiter Icy Moons Orbiter; 42; LPI-Contrib-1163
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  • 3
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    The effects of spaceflight on mammary metabolism in pregnant rats (1999)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The effects of spaceflight on mammary metabolism of 10 pregnant rats was measured on Day 20 of pregnancy and after parturition. Rats were flown on the space shuttle from Day 11 through Day 20 of pregnancy. After their return to earth, glucose oxidation to carbon dioxide increased 43% (P 〈 0.05), and incorporation into fatty acids increased 300% (P 〈 0.005) compared to controls. It is unclear whether the enhanced glucose use is due to spaceflight or a response to landing. Casein mRNA and gross histology were not altered at Day 20 of pregnancy. Six rats gave birth (on Day 22 to 23 of pregnancy) and mammary metabolic activity was measured immediately postpartum. The earlier effects of spaceflight were no longer apparent. There was also no difference in expression of beta-casein mRNA. It is clear from these studies that spaceflight does not impair the normal development of the mammary gland, its ability to use glucose, nor the ability to express mRNA for a major milk protein.
    Keywords: Aerospace Medicine
    Type: Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N. Y.) (ISSN 0037-9727); Volume 222; 1; 85-9
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  • 4
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    Association between gravitational force and tissue metabolism in periparturient rats (2004)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Recently, interest in mammalian reproduction and offspring survival in altered gravity has been growing. Because successful lactation is critical for mammalian neonate survival, we have been studying the effect of gravity metabolism. We have shown an exponential relationship between glucose metabolic rate in mammary tissue of periparturient rats and an increase in gravity load. In this study we showed that changes in mammary metabolic rate due to gravity force were accompanied by a decrease in glucose metabolism in adipose tissue and by a reduced size of adipocytes. We assume that these changes are likely due to changes in prolactin or leptin levels related to altered gravity load.
    Keywords: Aerospace Medicine
    Type: Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology (ISSN 1077-9248); 11; 2; P157-60
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