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  • LUNAR AND PLANETARY EXPLORATION  (11)
  • Deuterium oxide  (2)
  • PIC  (2)
  • 1
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    The vespa process for the analysis of seismic signals (1971)
    In:  Nature, Warszawa, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 232, no. 5, pp. 8-13, pp. 1013, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1971
    Keywords: Seismic networks ; Seismic arrays ; PIC ; ves
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Pattern recognition techniques for the interpretation of vespagrams and beamsplit data (1971)
    MIT Lincoln Lab.
    In:  Semiannual Technical Summary Report, Lexington, Mass., MIT Lincoln Lab., vol. 10, no. rapport C 20754-9.1 (2.2), pp. 38-41
    Details
    Publication Date: 1971
    Keywords: Artificial intelligence (AI) ; Pattern recognition ; Detectors ; PIC ; ves ; Seismic networks ; Seismic arrays ; Discrimination ; Data analysis / ~ processing
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
    Electronic Resource
    Electronic Resource
    The effect of deuterium oxide on protein turnover in Lemna minor (1979)
    Springer
    Planta 146 (1979), S. 229-236 
    Details
    ISSN: 1432-2048
    Keywords: Density labelling ; Deuterium oxide ; Lemna ; Protein turnover
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Lemna minor fronds transferred to a sterile culture medium containing 50% (v/v) deuterium oxide (2H2O) rapidly undergo a loss of soluble protein with a corresponding increase in free amino acids. The loss of protein is due to two factors: (i) the inhibition of protein synthesis for 4 h followed by a slower rate of synthesis than normal, (ii) a rapid 9–10 fold increase in protein degradation. In plants grown for longer periods (3–6 days) in 50% 2H2O medium, protein synthesis is inhibited by 20% and the rate constant of degradation is 2–3 times that measured in fronds growing in normal (H2O containing) complete medium. The initial loss of protein is not due to the breakdown of any specific protein fraction. Investigation of several enzymes indicates that all proteins are catabolised in response to 2H2O treatment. The implications of these results with regard to the interpretation of density-labelling experiments are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388237
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The mechanism of deuterium oxide-induced protein degradation in Lemna minor (1980)
    Springer
    Planta 148 (1980), S. 374-380 
    Details
    ISSN: 1432-2048
    Keywords: Deuterium oxide ; Lemna ; Protein degradation ; Stress (D2O) ; Tonoplast properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Transfer of Lemna minor fronds to culture medium containing 50% (v/v) deuterium oxide induces a large increase in the rate of protein breakdown, which is not due to an increase in the activity of acidic or neutral proteolytic enzymes or peptidases. Biochemical and ultrastructural evidence indicates that deuterium oxide affects the properties of certain membranes, particularly the tonoplast, and allows vacuolar proteolytic enzymes to pass into the cytoplasm and cause the increased protein breakdown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388126
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    Paper (German National Licenses)
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  • 5
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    Measurements of water vapor in Mars' antarctic (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A complete Mars year of measurements of atmospheric water vapor in the south arctic have been obtained from the Viking Orbiters. Analysis of the observations indicates that, except for the south remnant cap, the southern hemisphere of Mars is devoid of any substantial reservoirs of water in contact with the atmosphere, and that, in the summer time, the top layer of soil is desiccated. Small amounts of water ice are incorporated into the annual CO2 cap; this water is released at the cap margin when it retreats in the spring. The first global dust storm resulted in heating of the south arctic atmosphere and a transport of water in from the equatorial region. The second global dust storm had a negligible effect on atmospheric water vapor; the dust contained little water.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 45; Jan. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    The relative humidity of Mars' atmosphere (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: As a general rule, Mars' atmosphere contains as much water vapor as it can hold on a daily basis; it reaches saturation at night, and the vapor appears to be distributed throughout the lowest several kilometers. Interesting exceptions to this occur when there are temperature inversions in the arctic springtime and during dust-storm activity. As contrasted to the northern hemisphere there appears to be no local source of water in the southern temperate and arctic areas.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 84; Dec. 30
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    The vertical distribution of Mars water vapor (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Analysis of observations made from the Viking 1 Orbiter indicates that the water vapor over the Viking 1 landing site is uniformly mixed with the atmosphere and not concentrated near the surface. The analysis incorporates the effects of atmospheric scattering and explains why previous earth-based observations showed a strong diurnal variation in water content. It also explains the lack of an early morning fog and removes the necessity of daily exchange of large amounts of water between the surface and the atmosphere. A water vapor volume mixing ratio of 1.5 x 10 to the -4th is inferred for the Viking 1 site in late summer.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 84; June 10
    Format: text
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  • 8
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    Effects of dust on the heating of Mars' surface and atmosphere (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: An analysis performed to determine the effect dust particles suspended in Mars' atmosphere have on the radiation reaching the surface both directly and scattered by the dust is described. Additionally, the fraction of incident sunlight directly absorbed by the atmospheric dust is computed. These calculations are done for ranges of dust opacity, incidence angle, surface albedo, and dust albedo, representative of the conditions on Mars. The effect of atmospheric dust on the Bond albedo is discussed. It is shown that direct heating of the atmosphere by dust absorption of solar radiation is adequate to explain Mars' south polar spring temperature inversion. Under most circumstances the presence of dust in Mars' atmosphere produces a lowering of the average surface temperature; this is probably the cause of the anomalously slow south polar cap retreat of 1977. Explicit forms for both the surface heating and the atmospheric heating as a function of the dust opacity, incidence angle, surface albedo and dust albedo are given.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 84; Dec. 30
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  • 9
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    The Mars water cycle (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A model has been developed to test the hypothesis that the observed seasonal and latitudinal distribution of water on Mars is controlled by the sublimation and condensation of surface ice deposits in the Arctic and Antarctic, and the meridional transport of water vapor. Besides reproducing the observed water vapor distribution, the model correctly reproduces the presence of a large permanent ice cap in the Arctic and not in the Antarctic. No permanent ice reservoirs are predicted in the temperate or equatorial zones. Wintertime ice deposits in the Arctic are shown to be the source of the large water vapor abundances observed in the Arctic summertime, and the moderate water vapor abundances in the northern temperate region. Model calculations suggest that a year without dust storms results in very little change in the water vapor distribution. The current water distribution appears to be the equilibrium distribution for present atmospheric conditions.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 45; Feb. 198
    Format: text
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  • 10
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    Viking: Mars atmospheric water vapor mapping experiment - Preliminary report of results (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Observations made from the Viking 1 orbiter show very little water vapor in the Mars atmosphere in the southern hemisphere (0 to 3 precipitable micrometers) with a gradual increase across the equator to northern latitudes. Maximum amounts between 20 and 30 micrometers have been observed in the short period covered by the observations to date. The season, northern midsummer, corresponds to the beginning of the water vapor cycle in that hemisphere. A strong repetitive diurnal cycling between the solid and vapor phase is observed at a site to the east of the Tharsis Ridge at 10 deg north latitude; the vapor lies close to the martian surface and is most probably in saturation equilibrium with a surface haze or fog throughout much of the day.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Science; 193; Aug. 27
    Format: text
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