Dynamic tension data for 0.3 and 0.6 mM aqueous octanol solutions at 25 degrees C and constant-area conditions were obtained and compared with previous diffusion-controlled and mixed kinetics adsorption models. The results show that tension drops more slowly than predicted by the diffusion-controlled model. The modified Langmuir-Hinshelwood equation in a mixed kinetics model describes the data quite well. Moreover, the same solutions were examined with a pulsating bubble surfactometer at 10-80 cycles min(-1), with the bubble radius oscillating between 0.40 and 0.55 mm. The dynamic tension oscillates between a tension maximum gamma(max)>gamma(e) and a minimum gamma(min)

Keywords:AIR-WATER-INTERFACE;DIFFUSION-CONTROLLED ADSORPTION;GAS-LIQUID SURFACES;PULMONARY SURFACTANT;KINETICS;PROTEINS;BUBBLE;SULFATE