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  • 1
    Electronic Resource
    Electronic Resource
    On sonic discontinuities in an ideal radiating gas (1979)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 30 (1979), S. 937-942 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Résumé Dans cet article il s'agit de l'étude des phénomènes associés aux discontinuités soniques dans un gaz parfait rayonnant. On formule les équations différentielles gouvernant la croissance et l'amortissement de ces discontinuités. Afin de pouvoir les intégrer en toute généralité, on les transforme en une équation sur la courbe bicaractéristique dans la variété caractéristique. On donne le critère d'amortissement ou d'éclatement des discontinuités faibles. Le rayonnement contribue au développement rapide du choc.
    Notes: Abstract Following Elcrat the phenomena associated with the sonic discontinuities in an ideal radiating gas are studied here. The differential equations for growth and decay of these discontinuities are formulated. In order to integrate them in full generality they are transformed to an equation along the bicharacteristic curve in the characteristic manifold. The criterion for the decay or ‘blow up’ of weak discontinuities has been given. Radiation contributes to the fast development of shock.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01590491
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  • 2
    Electronic Resource
    Electronic Resource
    On the non-uniform propagation of weak discontinuities in magnetogasdynamics (1981)
    Springer
    Archive for rational mechanics and analysis 75 (1981), S. 169-174 
    Details
    ISSN: 1432-0673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00250478
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  • 3
    Electronic Resource
    Electronic Resource
    Corrigendum to “On the non-uniform propagation of weak discontinuities in magnetogasdynamics” (1982)
    Springer
    Archive for rational mechanics and analysis 78 (1982), S. 397-398 
    Details
    ISSN: 1432-0673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00249589
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  • 4
    Electronic Resource
    Electronic Resource
    Sonic discontinuities in a relaxing gas (1979)
    Springer
    Flow, turbulence and combustion 35 (1979), S. 151-160 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Following Elcrat [1] the phenomena associated with the sonic discontinuities in non-equilibrium gasdynamics have been studied here. The sonic wave in non-equilibrium gaseous medium propagates with the frozen speed of sound. The magnitude of discontinuities of the first derivatives of flow quantities in the unsteady flow of relaxing gas are shown to satisfy Riccatti equations along the orthogonal trajectories of surface S(t). In order to integrate them in full generality, they are transformed to an equation along the bicharacteristic curve in the characteristic manifold $$\sum = \mathop \cup \limits_t$$ S(t). These equations have been solved completely. The criteria for decay or “blow up” of sonic discontinuities are given and the particular cases of plane and spherical waves existing in an ideal dissociative gasdynamics have been discussed. In the case of planewave for uniform propagation, it is shown that the dissociating character of the gas is to decrease the critical time. Other cases of shock formation have been studied in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382701
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  • 5
    Electronic Resource
    Electronic Resource
    Substitution reactions under NH3 chemical ionization conditions in cis-/trans-1,2-dihydroxybenzosuberansCDRI Communication No. 3691. (1985)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 20 (1985), S. 680-684 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The nucleophilic substitution reaction under NH3 chemical ionization (CI) conditions in cis- and trans-1,2-dihydroxybenzosuberans (1-4) has been studied with the help of ND3 CI and metastable data. The results indicate that in the parent diols 1 (cis) and 2 (trans), the substitution ion [MsH]+, is produced mainly by the loss of H2O from the [MNH4]+ ion (SNi reaction) while in their 7-methoxy derivatives 3 and 4, the ion-molecule reaction between [M—OH]+ and NH3 seems to be the major pathway for the formation of [MsH]+. The substitution ion from 1 and 2 and the [MH]+ ion from trans-1-amino-2-hydroxybenzosuberan give similar collision-induced dissociation mass-analysed ion kinetic energy spectra. Interestingly, their diacetates do not undergo the substitution reaction.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210201107
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