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Table 5 Comparison of experimental with ideal parameters and interaction parameter (β) of the TRX-bile salt mixtures

From: Interactions between selected bile salts and Triton X-100 or sodium lauryl ether sulfate

α[TRX] cmc ex cmc id x 1 x id β
  (mM)    
Sodium deoxycholate
0 4.30   - - -
0.1 1.545 1.597 0.654 0.665 -0.16
0.2 0.832 0.981 0.739 0.817 -0.97
0.3 0.617 0.711 0.803 0.885 -1.04
0.4 0.498 0.554 0.850 0.923 -1.06
0.5 0.416 0.455 0.881 0.947 -1.16
Sodium cholate
0 12.90   - - -
0.1 1.565 2.06 0.733 0.857 -1.64
0.2 0.848 1 0.785 0.931 -2.27
0.3 0.633 0.737 0.838 0.954 -2.19
0.4 0.510 0.584 0.877 0.973 -1.96
0.5 0.423 0.471 0.901 0.982 -2.26
Sodium 7-oxodeoxycholate
0 61.10     
0.1 2.021 2.32 0.870 0.965 -1.93
0.2 1.040 1.18 0.893 0.984 -2.61
0.3 0.723 0.79 0.920 0.991 -2.78
0.4 0.560 0.596 0.942 0.994 -2.75
0.5 0.464 0.478 0.945 0.996 -2.51
  1. cmcex the experimentally obtained cmc values of investigated binary systems, each result is the average of three separate determinations.
  2. cmcid the values for the critical micelle concentrations of ideal mixtures, calculated according to Clint's theory of ideal mixtures.
  3. x 1 mole fractions of the more hydrophobic surfactant in the real mixed micelles, according to Rubingh.
  4. xid mole fractions of the more hydrophobic surfactant in the ideal mixed micelles, according to Motomura's model.