Lipids in Membranes - Membrane Biophysics, Biological and Medical Physics, Biomedical Engineering - page 41

Fig. 3.6 This temperature (T, ◦ C) versus osmotic pressure phase diagram for a reentrant phase
transition ( H II -to- L α -to- H II ) is schematically drawn in light of Ref. [ 16 ]. The right-hand axis plot
represents the intrinsic lipid curvature ( R 0 in Å; presented in Eq. 3.1 and explained there). The slope
and shape of the curve separating lamellar and inverse hexagonal phases may dramatically change
between different lipids, despite the fact that they may undergo the same type of phase transition
Fig. 3.7 This temperature (T, ◦ C) versus hydration plot in a reentrant phase transition ( H II -to- L α -
to- H II ) is schematically drawn in light of Ref. [ 16 ]. The horizontal axis represents the increasing
values of 'wt. fraction lipid'. The right - hand axis plot represents the intrinsic lipid curvature ( R 0
in Å; presented in Eq. 3.1 and explained there). In this type of a phase transition, coexistence of
different phases, as shown here, is evident. The slope and shape of the curve separating lamellar
and inverse hexagonal phases may dramatically change between different lipids despite the fact
that they may undergo the same type of a phase transition. In some samples the cubic phase is also
observed [ 6 ]