Physiological compression–expansion cycles for
SLS and vaping
components. Results from CSD cycles run at up to 20 cycles per minute
for 2 min. (A) SLS alone, first and last iso-cycles. (B) SLS with
BA, first and last iso-cycles. (C) SLS with BPGA, first and last iso-cycles.
BA and BPGA were added in a 1:10 molar ratio to surfactant lipids.
(D) Comparison of the mean γmin of the first and
last five cycles for each condition. (E) Temporal evolution of γmin covering all cycles of each condition represented. (F)
Relative global compressibility of the first and last cycles, relative
to the SLS first cycle. (G) Mean hysteresis of the first and last
three cycles, relative to the SLS first cycle. Three independent replicates
for each condition. Significance values represent results from a two-way
ANOVA; “ns”: not significant (p >
0.05).