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  • 1
    ISSN: 1573-935X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 273 (1978), S. 497-501 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Two independent kinds of lunar expedition data are considered which put forward some strong theoretical evidence of the existence of a considerable atmosphere on the Moon during the greater part of its history. The transformation of a meteoritic flux when passing through an arbitrary atmosphere has ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 261 (1976), S. 666-669 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We discuss here the theory of the volatilisation of components of molten rocks and develop a model for this process, which enables us to draw some conclusions about such phenomena on the ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 264 (1976), S. 241-241 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Calculated values Tv for volatilization of Na from lunar material (terrestrial time) Surface temperature (K) Particle size (cm) 1,500 900 500 300 1 15 h 5 d 500 300 10-2 0.15h 1.2h 25 d 300 yr Table 1 gives the calculated values ?V for the volatilisation of Na (see ref. 1) from the ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 261 (1976), S. 664-666 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The discovery of many particles of glass in the lunar regolith has resulted in various hypotheses for their origin1. Based on previously unpublished work2, we here give an analysis of the principal mechanisms of their formation and ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 274 (1978), S. 882-883 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Photographs by high speed camera (Fig. 2) confirm that shock -wave compression of very porous polystyrene is associated with a transition into the gaseous phase. Figure 2 shows that propagation of a shock wave in porous polystyrene (the arrow in Fig. 1 indicates the corresponding p-V values) is ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 266 (1977), S. 62-63 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Barrier-bred SPF Fisher 344 rats (28 d old) (Charles River) were kept in a barrier facility. All rats were initially fed Ralston-Purina diet 5755. Body weight and food consumption were recorded for 2 weeks after which the diet allotment for half the rats was reduced over 1 week to 60% that of 'ad ...
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Power technology and engineering 13 (1979), S. 1141-1144 
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Conclusions 1. Chalks or rocks similar to them in lithology can be used as natural construction materials for constructing directly placed fill and hydraulic-fill structures. The characteristics of the lithologic composition of chalks and the technical requirements imposed on elements of the structures can affect the technology of placing or hydraulic filling of the rocks, but they should be examined in each case with respect to the specific conditions. 2. Depending on the requirements imposed on the element of the structure and technology of placing the rock used, the created fill can have a different density (strength) and permeability. It is possible to obtain fills with a density to 1.60 g/cm3 with shear strength tan ϕ=0.30 at C=0 or C=0.10·105 Pa and Kp equal to hundredths or thousandths m/day. 3. In the case of rolled fills it is exceptionally important to regulate the water content of the fill correctly with bringing of the degree of saturation to 0.9. Another important factor is the preliminary (before rolling) destruction of the structure of chalk, which is best achieved by wetting the fill, also to the indicated limits. The optimal height of the fill layer is apparently 30 cm, but depending on the specific conditions and requirements imposed on the structure it can be increased to 40–50 cm. 4. Placement of chalk in water complicates subsequent compaction and leads to the formation of fills with a low density and high permeability. Hydraulic filling of a chalk — water mixture is possible, but the conditions of using this method require additional study. 5. Various vehicles can be used as compacting mechanisms; the specific choice of machines should be made in relation to the technical requirements imposed on the finished fill.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Power technology and engineering 10 (1976), S. 339-347 
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Conclusions 1. The pattern of the limiting state of a rock slope, which was obtained by analytical means (according to the author's scheme whereby the stress-strainstate was computed, considering elastic-plastic deformations), agrees with that of the limiting state obtained on the slope model. 2. It is shown by a comparison of the results obtained for the stability of a rock slope with the results of computations performed in accordance with a number of familiar methods that these methods produce extremely limited and sometimes contradictory data on slope behavior. 3. To determine the reliability of rock slopes, it is expedient to take a more promising approach based on an analysis of the stress-strain state of the slope, which is computed with consideration given to elastic-plastic deformations.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Power technology and engineering 11 (1977), S. 956-957 
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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