Table 2.
Sample preparation details for each analytical technique used in this study
| Technique | Amount of lipids | Solvent | Spraying Area | Sample Support | Hydration |
|---|---|---|---|---|---|
| Permeability | 1 mg | hexane/ ethanol (2:1, v/v) | 1 × 1 cm2 | nucleopore polycarbonate disk | 1 h, PBS in diffusion cell, at 32°C |
| TEWL | 1 mg | hexane/ ethanol (2:1, v/v) | 1 × 1 cm2 | nucleopore polycarbonate disk | 30 min, water in diffusion cell, room temperature |
| SAXD | 1 mg | hexane/ ethanol (2:1, v/v) | 2 × 3 mm2 | nucleopore polycarbonate disk | 24 h, 80% relative humidity, room temperature |
| FTIR | 1 mg | chloroform/ methanol (2:1, v/v) | 1 × 1 cm2 | silver bromide (AgBr) window | ≥12 h, acetate buffer (pH 5) in D2O, at 37°C |
| Neutron diffraction | 10 mg | chloroform/ methanol (2:1, v/v) | 1.2 × 3.8 cm2 | silicon substrate | ≥12 h, D2O/H2O buffer (100%, 50%, 8%), at 37°C |