Quotient chain complex

It is easy to generalize the notions of submodule and quotient module to that of general chain complexes. 

We shall only be concerned with x-spaces X which are C complexes with the basepoint a 0-cell, such that x acts free by permutation on the cells of X-(pt.) with the quotient (1)-space X/x a finitely dominated CW complex - X is a "finitely dominated CWx-complex" in the terminology of SH -For such X the chain complex C(X) can be replaced by a chair equivalent finite-dimensional 27. (x]-module chain complex, air to be denoted C(X). (If X/x is a finite CW complex C(X) can be ta)ren to be the reduced cellular chain complex of X, which is a finite f.g. free 27 n -module chain complex.)... 

The complexity in the oxidation reactions of ascorbic acid originates from the uncertainty whether the redox potential reported to date corresponds to the formation of the open-chain radical or noL Considering Scheme 1, the redox potential of the ascorbic acid/ radical couple may be expressed by eq. 7 with the use of the equilibrium quotient, K, for the formation of the bicyclic rascal from the open-chain ascortnc acid radical ... 

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