Fig. 5

The surface tension (γ) of betaine in various molality (mol kg[-3) concentrations of aqueous gabapentin solutions at 298 K: ▪, 0.0000; ♦, 0.0100; ▲, 0.0300; and ●, 0.0500.
The surface tension (γ) of betaine in various molality (mol kg[-3) concentrations of aqueous gabapentin solutions at 298 K: ▪, 0.0000; ♦, 0.0100; ▲, 0.0300; and ●, 0.0500.