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  • Polymer and Materials Science  (2,161)
  • General Chemistry  (921)
  • Biochemistry and Biotechnology
  • LUNAR AND PLANETARY EXPLORATION
  • 1990-1994
  • 1970-1974  (3,194)
  • 1973  (3,194)
Collection
Keywords
Publisher
Years
  • 1990-1994
  • 1970-1974  (3,194)
Year
  • 1
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    Apollo 17: On the Shoulders of Giants (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A documentary view of the Apollo 17 journey to Taurus-Littrow, the final lunar landing mission in the Apollo program is discussed. The film depicts the highlights of the mission and relates the Apollo program to Skylab, the Apollo-Soyuz linkup and the Space Shuttle.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-110105 , NONP-NASA-VT-95-33956
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Lunar sample information catalog, Apollo 17 (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: MSC-03211 , NASA-TM-79501
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The nature of lunar soil (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Characteristics of lunar soil are examined. The paper includes topics such as lunar soil genesis, particle types, grain size distribution, grain shape distribution, specific gravity, minimum and maximum density, and relative density. Lunar soil, consisting of complex mixtures of mineral fragments, miscellaneous glasses, agglutinates, and lithic fragments, is produced primarily by meteorite impacts. The grain size distributions for soils exposed to meteorite reworking for 100 million yr or more are classified as well-graded silty sands and sandy silts. The specific gravity of submillimeter lunar soil samples varies from 2.9 to 3.24 and individual particles range from 1.0 to greater than 3.32. Differences in specific gravity, intragranular porosity, particle shape, surface texture, and grain arrangements result in wide ranges in minimum and maximum densities. Meteorite impacts cause in situ lunar soil to have a low relative density at the surface which increases rapidly to a very high relative density at depths greater than 10 cm to 20 cm.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: American Society of Civil Engineers; Journal
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Study of thermal properties of the lunar regolith based on in situ temperature measurements and experiments on soil simulants (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The experimental design and the development of a theory to interpret the experimental data from measurements of the thermal conductivity of lunar core samples. Measurements conducted while the lunar material is still in the core tube reduce the possibility of physical and chemical disturbances to the sample. The sample was heated externally by radiation at a known rate, the variation of temperature was measured at the surface of the core sample, and thermal conductivity was determined by comparing the observed temperature with the theoretically expected one.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-CR-143621
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Summary of the proceedings of the Mars Surface Sample Return Symposium (1973)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: A summary is made of various technical and scientific aspects of a Mars surface sample return mission. Particular attention was focused on the question of back contamination. Data are also given on problems inherent in the back contamination issue and return sample mission; areas where additional research is needed were pointed out. Quarantine procedures, safety measures, and sterilization effects on organic-inorganic data, and biological problems were also dealt with.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-X-72442 , Oct 24, 1973 - Oct 25, 1973; Moffett Field, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Martian surface weathering studies (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The nature of the Martian surface was characterized by means of its reflectance properties. The Mariner 9 photography was used to establish terrain units which were crossed by the Mariner 6 and 7 paths. The IR reflectance measured by the IR spectrometers on these spacecraft was to be used to indicate the nature of the surface within these units. There is an indication of physical size and/or compositional variation between units but too many natural parameters can vary (size, shape, composition, adsorbed phases, reradiation, atmospheric absorbtion, temperature gradients, etc.) to be certain what effect is causing those variations observed. It is suggested that the characterization could be fruitfully pursued by a group which was dedicated to peeling back the layers of minutia affecting IR reflectance.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-CR-145611 , SSL-SER-16-ISSUE-64
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
    Electronic Resource
    Electronic Resource
    The extrinsic cotton effects of nitrobenzylic chromophore bound to helical poly-α,L-glutamic acid (1973)
    New York : Wiley-Blackwell
    Biopolymers 12 (1973), S. 121-125 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1973.360120111
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of degree of polymerization and steric configuration of poly(2-vinylpyridine) as catalyst in the polymerization of phenylalanine NCAThis is the sixth paper in the series of Polymerization of Amino Acid Derivatives by Polymer Catalysts. For the previous paper, see M. Sisido et al., Biopolymers, 9, 791 (1970). (1973)
    New York : Wiley-Blackwell
    Biopolymers 12 (1973), S. 181-191 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Despite its being weaker base poly(2-vinylpyridine) polymerized DL-β-phenylalanine NCA at a much faster rate than pyridine and α-picoline. Poly(2-vinylpyridine) adsorbs NCA by hydrogen bonding with the cooperation of a few pyridine groups. This results in a high local concentration of NCA. The syndiotactic configuration of pyridine group seemed to be least suitable for the cooperative hydrogen bonding. Adsorbed NCA is activated to form an “activated” NCA which in turn reacts with an NCA adsorbed on the same polymer chain. Since the polymer chain is flexible, this intramolecular reaction takes place frequently, resulting in the acceleration of polymerization. The intramolecular reaction along the polymer chain is dependent on the degree of polymerization of polymer catalyst. A suitable model was proposed for the intramolecular reaction to explain the effect of degree of polymerization.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1973.360120117
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  • 9
    Electronic Resource
    Electronic Resource
    Single- and double-strand breaks in 5-bromouracil-substituted DNA of B. subtilis and phage PBSH after irradiation with long-wave length UV and their correlation to intramolecular energy transfer (1973)
    New York : Wiley-Blackwell
    Biopolymers 12 (1973), S. 329-340 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 5-Bromouracil-substituted DNA was isolated form B. Subtilis and phage PBSH. The three DNA fractions of Different densities (TT, TB, and BB) were irradiated with u.v. (313nm). The number of single-strand and double-strand breaks was determined. The breakage rates are given. It was found that in hybrid DNA (TB) double-strand breaks occur depending linearly on dose. In BB-DNA the observed double-Strand bresks can be divided into two fractions with a linear and quadratic dose dependence respectively. The results can be explained by assuming intramolecular energy transfer from the BU-containing strand to its complementary strand.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1973.360120210
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  • 10
    Electronic Resource
    Electronic Resource
    Calorimetric investigations of crystalline 3′,5′-cyclic nucleotides (1973)
    New York : Wiley-Blackwell
    Biopolymers 12 (1973), S. 229-235 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Differential enthalpic analysis of a series of 3′,5′-cyclic nucleotides indicates that homolytic cleavage of the six-membered phosphate ring occurs either immediately prior to or concurrent with decomposition of the crystal lattice. Homolysis is followed by a rapid polymerization to yield oligonucleotides. The enthalpies of these reactions have, with the exception of guanosine 3′,5′-cyclic phosphate, almost identical values of 25 kcal/mole. The anomalous case is attributed to a more stabilized phosphate ring as a result of hydrogen bonding through the two position of the purine ring. The pair of overlapping exothermic peaks observed in each of the thermograms for cAMP and cIMP is related to the presence of two conformational arrangements within the unit cell of each compound.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1973.360120203
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