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  • 1985-1989  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    The chromatic connectivity of graphs (1988)
    Springer
    Graphs and combinatorics 4 (1988), S. 229-233 
    Details
    ISSN: 1435-5914
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract A graphG ischromatically k-connected if every vertex cutset induces a subgraph with chromatic number at leastk. This concept arose in some work, involving the third author, on Ramsey Theory. (For the reference, see the text.) Here we begin the study of chromatic connectivity for its own sake. We show thatG is chromaticallyk-connected iff every homomorphic image of it isk-connected. IfG has no triangles then it is at most chromatically 1-connected, but we prove that the Kneser graphs provide examples ofK 4-free graphs with arbitrarily large chromatic connectivity. We also verify thatK 4-free planar graphs are at most chromatically 2-connected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01864163
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Computer simulation of non-linear preparative chromatography processes (1989)
    Springer
    Chromatographia 28 (1989), S. 293-299 
    Details
    ISSN: 1612-1112
    Keywords: Preparative liquid chromatography ; Column overloading ; Computer simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A theory of non-linear chromatography based on the mass balance equation is presented. The model is a system of partial differential equations and it includes axial dispersion in the mobile phase, flow in the mobile phase and mass transfer between phases. In the case of the injection of a mixture competition between components for places in the stationary or the mobile phase is taken into account. In the paper are discussed: numerical calculations of concentration and volume overloading and the effect of the mutual influence of the components of the injected mixture on the process of mass transfer between phases. Additionally, results of experiments for convex and concave adsorption isotherms are presented. In both cases the results obtained qualitatively confirm the theoretical analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02260778
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Computer simulation of non-linear preparative chromatography processes (1989)
    Springer
    Details
    Publication Date: 1989-09-01
    Print ISSN: 0009-5893
    Electronic ISSN: 1612-1112
    Topics: Chemistry and Pharmacology
    Published by Springer
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