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  • Nature Publishing Group  (1)
  • 2020-2022  (1)
  • 1950-1954  (1)
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    Electronic Resource
    Electronic Resource
    Synthesis of L -Ascorbic Acid in Plants and Animals (1953)
    [s.l.] : Nature Publishing Group
    Nature 171 (1953), S. 348-349 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The experimental facts are as follows. The y-lactones of D-glucuronic acid and L-gulonic acid, when fed to cress seedlings or injected into rats, were found to be transformed, into L-ascorbic acid. D-Galacturonic acid methyl ester, and L-galactonic acid y-lactone behaved similarly. No other sugar ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/171348a0
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    Paper (German National Licenses)
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    Energy Dissipation-Based Method for Strength Determination of Rock under Uniaxial Compression (2020)
    Hindawi
    Details
    Publication Date: 2020-08-13
    Description: The energy conversion in rocks has an important significance for evaluation of the stability and safety of rock engineering. In this paper, some uniaxial compression tests for fifteen different rocks were performed. The evolution characteristics of the total energy, elastic energy, and dissipated energy for the fifteen rocks were studied. The dissipation energy coefficient was introduced to study the evolution characteristics of rock. The evolution of the dissipation energy coefficient for different rocks was investigated. The linear interrelations of the dissipation energy coefficients and the yield strength and peak strength were explored. The method was proposed to determine the strength of rock using the dissipation energy coefficients. The results show that the evolution of the dissipation energy coefficient exhibits significant deformation properties of rock. The dissipation energy coefficients linearly increase with the compaction strength, but decrease with the yield strength and peak strength. Moreover, the dissipation energy coefficient can be used to determine the rock burst proneness and crack propagation in rocks.
    Print ISSN: 1070-9622
    Electronic ISSN: 1875-9203
    Topics: Mathematics
    Published by Hindawi
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