Apparent surface tension hysteresis of a dynamical system

A Theoretical Model of Pulmonary Surfactant Multilayer Collapse under Oscillating Area Conditions

“…Under low concentration conditions, the present model contains kinetics (adsorption/desorption and diffusion) similar as to those of previous models for determining surfactant hysteresis in an oscillating bubble system (17,21,22). However, while Horn and Davis (23) pinpointed viscoelasticity of the interface as the most probable cause of P-V hysteresis, that study did not consider the effects of collapse and respreading, which can be extremely important (2,16).…”

Dynamic surface tension of natural surfactant extract under superimposed oscillations

“…It is also speculated that the noisy pressure signal may also promote surfactant secretion in the lung (Arold et al, 2006). Horn and Davis (1975) were the first to introduce a comprehensive model describing surface tension in surfactant undergoing dynamic area changes but is restricted to near equilibrium since it made no provision for over-compression or ''squeeze-out'' of surfactant from the surfactant layer at the gasliquid interface. Otis et al (1994) modeled the behavior of Surfactant TA TM (Surfacten, Tokyo Tanabe, Tokyo, Japan) as observed in a pulsating bubble surfactometer (PBS).…”

Pulmonary Fluid Dynamics

“…The viscous component can be understood only by means of a fluid-mechanical analysis of airflow in the airways. The former is not within the scope of this review (see, instead, West & Matthews 1972, Hoppin & Hilde brandt 1977, Horn & Davis 1975, but the latter is its principal subject.…”