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  • Analytical Chemistry and Spectroscopy  (132)
  • LUNAR AND PLANETARY EXPLORATION  (122)
  • Aerodynamics
  • 1985-1989  (254)
  • 1935-1939
  • 1985  (254)
Collection
Keywords
Publisher
Years
  • 1985-1989  (254)
  • 1935-1939
Year
  • 1
    Electronic Resource
    Electronic Resource
    Letters to the editor (1985)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 20 (1985), S. 422-431 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210200608
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Mapping and Geological Analysis of Mercury and Venus Radar Ranging Data (1985)
    In:  CASI
    Details
    Publication Date: 2014-10-09
    Description: Although many radar profiles and images of the areas within 20 deg of Mercury's equator had been obtained from 1971, at both Goldstone and Arecibo radar facilities, surprisingly little geological analysis had been done with these data until recently. Topographic profiles and radar roughness reflectivity images which can be derived from these data will be crucial in completing the geological mapping of Mercury now underway at the U.S. Geological Survey. Earth based radar observations of Mercury and the other terrestrial planets as well are a potentially very valuable tool in the determination of the physical nature of their surfaces. Processing of available radar data must be completed to establish any systematic relationship between raar reflectivities and roughness, density, dielectric constant, and other related geological parameters.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984; p 453-455
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
    Electronic Resource
    Electronic Resource
    Fast atom bombardment of flavonols (1985)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 12 (1985), S. 596-601 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The positive ion fast atom bombardment (FAB) mass spectra of flavonols show reasonably abundant [M + H]+ ions. The protonated aglycone is the base peak in the spectra of all compounds investigated. The various protonated aglycones show structure-specific fragmentation reactions, which are more distinct in their metastable ion and collisional activation spectra. Discrimination between isomeric aglycones is possible using these characteristics. The number and size of the monosaccharides in the glycosides can be established. Their positional identity, however, cannot be derived from FAB spectra.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200121006
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    NMR study of sesquiterpenes of the helenalin and parthenin series (1985)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 23 (1985), S. 494-502 
    Details
    ISSN: 0749-1581
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The assignment of the proton and carbon spectra of some cyclopropane sesquiterpene lactone derivatives of helenalin and anhydroparthenin is presented. The interpretation of the spectra was achieved using 1H-13C two-dimensional heteronuclear chemical shift correlation, proton two-dimensional homonuclear correlated 2D and 2D-J, and some classical techniques. In particular, the spectra of halocyclopropane derivatives are discussed and compared with the spectra of the parent sesquiterpenes.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260230703
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    Paper (German National Licenses)
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  • 5
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    Mars: Seasonally variable radar reflectivity (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The 1971/1973 Mars data set acquired by the Goldstone Solar System Radar was analyzed. It was established that the seasonal variations in radar reflectivity thought to occur in only one locality on the planet (the Solis Lacus radar anomaly) occur, in fact, over the entire subequatorial belt observed by the Goldstone radar. Since liquid water appears to be the most likely cause of the reflectivity excursions, a permanent, year-round presence of subsurface water (frozen or thawed) in the Martian tropics can be inferred.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar and Planetary Inst. 16th Lunar and Planetary Sci. Conf.; p 74-77
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Unsupervised Classification of Global Radar Units on Venus (1985)
    In:  CASI
    Details
    Publication Date: 2014-10-09
    Description: Characterization of the Venusian surface in terms of its radar properties was accomplished by application of an unsupervised, linear discriminant algorithm to two Pioneer-Venus (PV) Orbiter radar data sets: the RMS-slope (surface roughness) and reflectivity. Both databases were spatially filtered to the same effective resolution of 100 km prior to classification. A recent supervised classification study using these data was based on presupposed morphologic significance of selected data ranges. The knowledge of both Venusian geology and the geologic significance of the radar data is so limited that the data warrant a more unsupervised approach; for this study a linear discriminant classifier was chosen. This approach is purely statistical, thereby removing any observer bias. Statistical significance of the resulting clusters was evaluated by an ancillary program in which an F test utilizing the Mahalanobis' distance.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984; p 450-452
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Lunar and Planetary Science Conference, 15th, Houston, TX, March 12-16, 1984, Proceedings. Part 2 (1985)
    In:  Other Sources
    Details
    Publication Date: 2016-03-09
    Description: Subjects of lunar petrology are discussed, taking into account Apollo 14 aluminous mare basalts and their possible relationship to KREEP, the petrology and geochemistry of clasts from consortium breccia, the depths of the mare basalt source region, the origin of olivine at Copernicus, a transient heating event in the history of a highlands troctolite from Apollo 12 soil, and the composition and evolution of the lunar crust in the Descartes highlands. Other topics explored are related to early earth and magmatic processes, differentiated meteorites, chondritic meteorites, other planets and remote sensing, and cratering. Attention is given to the gravity field of Venus at constant altitude and comparison with earth, a spectral analog of Martian soil, dark halo craters and the thickness of grooved terrain on Ganymede, the geomorphology of Rhea, a Monte Carlo model of lunar megaregolith development, the scaling of complex craters, crustal radiogenic heat production and the selective survival of ancient continental crust, and the formation of an impact-generated H2O atmosphere and its implications for the early thermal history of the earth.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: (ISSN 0148-0227)
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Martian Terrain Ages (1985)
    In:  CASI
    Details
    Publication Date: 2014-10-08
    Description: The cratering record in the inner Solar System shows two crater populations based on their size/frequency distributions. The heavily cratered surfaces of the Moon, Mercury and Mars all show a similar multisloped crater size distribution which represents the period of heavy bombardment. On the younger plains units of the Moon and Mars the crater size/frequency distribution has about a -3 slope over the same diameter range. The different crater population represents the accumulation of craters since the end of heavy bombardment. The high flux of the early impacting objects dominated the cratering record prior to 3.8 BY. If heavy bombardment was primarily the result of comets (1) or a disrupted planetesimal (2), then heavy bombardment ended simultaneously on all of the inner planets. If, on the other, heavy bombardment was caused by accretional remnants, then it may have extended as much as 1 BY later on Mars than on the Moon and other terrestrial planets (3). Martian surfaces can be dated relative to the end of heavy bombardment by the type of crater population superposed on them. The relative ages of surfaces within these two time divisions can be determined by crater densities.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984; p 177-179
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Venus Surface Composition from Radio/radar Measurements (1985)
    In:  CASI
    Details
    Publication Date: 2014-10-08
    Description: Three different radio techniques were used to study the electrical properties of the surface of Venus. The reflectivity of the surface at near normal incidence was studied using radar from the Pioneer Venus Orbiter (PVO) spacecraft. These measurements have inferred the corresponding dielectric constants. Surface emissivities were calculated using measurements of thermal emission brightness temperature obtained both from spacecraft and from the ground. These measurements also have inferred dielectric constant. The degree of linear polarization associated with thermal energy emitted from the surface at various angles was examined. The dielectric constant was calculated. The radar data have provided the highest surface resolution of the three techniques, and were the first to show the unusually high values of Fresnel reflection coefficient (approaching 0.40 in extreme cases) that are associated with many of the elevated regions of Venus. The distribution of small scale surface roughness was estimated.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984; p 99-100
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Submillimeter observations of the asteroid 10 Hygiea (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The first successful ground-based observations of any asteroid at submillimeter wavelengths are reported. Observations of the asteroid 10 Hygiea at 370 and 770 micrometers are combined with observations in the near and thermal infrared (2.2, 10.6, and 21 micrometers) to study the thermal properties of Hygiea's regolith. The 'standard' (nonrotating) thermal model is consistent with the entire data set, although a rotating thermophysical model with a 'lunarlike' thermal inertia cannot be ruled out.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus (ISSN 0019-1035); 63; 192-200
    Format: text
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