TABLE 2.

Results for the calculation of mean molecular area, free energy change per POPC molecule, and change in γ required to give ΔG = 0; see text for details

Solution	γair/water, mN/m	Δγair/water, mN/m	Area/POPC, nm2	ΔG, 10−21 J/POPC	ΔG, in kT at 298 K	Δγ, mN/m, required to give ΔG = 0
Water	72.8	0	0.653	0	0	0
Betaine 0.5 osm/kg	72.97	0.17	0.641	−0.62	−0.15	0.97
Betaine 1.0 osm/kg	73.22	0.42	0.632	−1.08	−0.26	1.71
Betaine 2.0 osm/kg	73.6	0.80	0.617	−1.86	−0.45	3.01
Sucrose 0.5 osm/kg	73.38	0.58	0.628	−1.31	−0.32	2.09
Sucrose 1.0 osm/kg	74.14	1.34	0.608	−2.34	−0.57	3.85
Sucrose 2.0 osm/kg	75.58	2.78	0.578	−3.93	−0.95	6.80
Choline 0.5 osm/kg	72.77	−0.03	0.647	−2.86	−0.07	0.44
Choline 1.0 osm/kg	73.07	0.27	0.643	−0.51	−0.12	0.79
Choline 2.0 osm/kg	73.44	0.64	0.630	−1.17	−0.29	1.86