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Complete conversion of the lamellar Lα phase into Im3m cubic phase in DOPE-Me dispersion in a single heating-cooling cycle Lα → HII → Im3m. The Im3m lattice constant is 40.3 nm. Heating rate 1°C/min; cooling rate 5°C/min. Diffraction frames of 1 s exposure were recorded every 1 min. Lα → HII transition onset at 67.5°C. HII → Im3m transition onset ∼55°C. The sample was a 10% (w/v) dispersion of DOPE-Me in PBS pH 7.2.
