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  • Physics  (2)
  • action-angle variables  (1)
  • isotherms  (1)
  • 1970-1974  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Action-angle variables in quantum statistical mechanics (1972)
    Springer
    Journal of statistical physics 5 (1972), S. 173-183 
    Details
    ISSN: 1572-9613
    Keywords: Coherent states ; number conservation ; action-angle variables ; conjugate property
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Utilizing the facts (i) that the number of particles in the many-boson system is conserved and (ii) that the Hamiltonian is Hermitian, a new set of variables comprising “action” and “angle” variables has been introduced. These variables are conjugate in the “mean” and provide a rigorous approach to introducing phase variables for “total-number-conserving many-boson systems.”
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01023740
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  • 2
    Electronic Resource
    Electronic Resource
    On the gas-liquid phase transition (1973)
    Springer
    Journal of statistical physics 7 (1973), S. 131-142 
    Details
    ISSN: 1572-9613
    Keywords: Partition function ; cluster expansion ; grand partition function ; fugacity expansion ; analyticity ; phase transition ; isotherms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new approach to the problem of the gas-liquid phase transition, based on the Mayer cluster expansion of the partition function, is proposed. It is shown that the necessary and sufficient condition for phase transition to occur is that there exist a temperatureT= Tc 〉 0 such that forT ⩽T c, all theb l (except perhaps a finite number of them) are positive, where theb l, are the cluster integrals (as defined by Mayer) in the thermodynamic limit. Explicit expressions for the isotherms for gas-saturated vapor and liquid phases are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01024211
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  • 3
    Electronic Resource
    Electronic Resource
    Polymerization of N-vinylcarbazole by chlorides and oxychlorides of some group V elements. III. Effect of some transfer and terminating agents on the kinetics (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 1337-1343 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; 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/pol.1974.170120621
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  • 4
    Electronic Resource
    Electronic Resource
    Polymerization of N-vinylcarbazole by chlorides and oxychlorides of some group V elements. II. Kinetics and mechanism of the polymerization initiated by arsenic trichloride (1973)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 11 (1973), S. 7-25 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The polymerization of N-vinylcarbazole (NVC) initiated by AsCl3 in benzene and nitrobenzene solvents was studied at 33°C. Rp is proportional to the first power of the initiator concentration. Rp varies in a first-order manner with NVC concentration up to a certain optimum concentration of the latter, after which it falls and ultimately levels off. The rate and the molecular weight are depressed by the addition of various amines, preformed poly-NVC, and water. HCl does not have any cocatalytic effect on the system. Rate and the molecular weight are increased in nitrobenzene. The degree of polymerization stays independent of the initiator and NVC concentration and also of increasing conversion. These results suggest a conventional cationic mechanism, and overrule the possibility of a cation radical initiation. A suitable kinetic scheme has been proposed in conformity with the findings.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1973.170110102
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