The effect of volume ratio on the encapsulation of riboflavin, a
dipeptide and a pentapeptide was examined and the results are
summarised in Table 1. For each of the compounds the Emax at
equilibrium increased with increasing volume ratio, Emax values
of 57 ± 2.6, 56 ± 2.8 and 95 ± 2.4 were obtained respectively, at a
volume ratio of 0.6. Similarly to the results observed with tryptophan,
the rate constant for uptake of each of the compounds was
constant and independent of volume ratio. The average rate constants
ke obtained for riboflavin, dipeptide and the pentapeptide
were 0.4, 0.38 and 0.69 min1, respectively.