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[Physical chemical aspects of immunologic and other reversible association reactions].

The standard concepts, symbols, and formulae of reversible association reactions are comprehensively illustrated with the aid of the immune reaction, and presented in the context of their use in analysis (section 1). The enthalpy and entropy values of activation and reaction are interpreted in the light of the results of recent investigations (section 2). Common methods that can be performed in the ordinary clinical chemical laboratory are discussed for the determination of physical chemical constants, including those of complicated association reactions (section 3); Processing of experimental data was recently reviewed in this journal (E. Kuss, J. Clin. Chem. Clin. Biochem. 20, 227-234 (1982]. The use of physical chemical constants in analysis is illustrated with examples (section 4).