Relative magnitude of nonpolar sugar-hydrocarbon interaction

2 Relative magnitude of nonpolar sugar-hydrocarbon interaction 

Solubilities (S) of 1-octanol and aromatic hydrocarbons in 1 molal sugar solutions at 25°C. 

4 can be reformulated for the apparent transfer free energy in the form, 

AF = -RT ln(l + K PP[S] ), which is formally identical to the equations applied to urea-protein (ref. 36), salt-nonionic solute (ref. 37) and urea-nonionic solute (ref. 38) systems. Assuming the activity coefficient of the hydrocarbon in the saturated water solution to be unity (ref. 39), the activity coefficient (f) of the hydrocarbon in the sugar solution is given by 

Since the concentration of the added sugar [S ] is much greater than that of the hydrocarbon (C°), [S] may be replaced by [S ], and eqn. 6 can be rewritten as 

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