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Phase diagrams of pseudo-binary phospholipid systems IV. Preliminary results about the effects of LiCl and CaCl2 on the phase transitions of amphoteric phospholipids in aqueous dispersions

✍ Scribed by Hans-Dieter Dörfler; Peter Miethe; Helmut W. Meyer

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 976 KB
Volume: 54
Category: Article
ISSN: 0009-3084
DOI: 10.1016/0009-3084(90)90011-f

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✦ Synopsis

Differential scanning calorimetry and freeze-fracture electron microscopy were applied to study the effects of LiCI and CaCI 2 on the lyotropic and thermotropic properties of dipalmitoylphosphatidylcholine and dipalmitoylphosphatidylethanolamine in dispersions with excess water. Significant changes of the phase transition temperatures and phase transition enthalpies were observed. The phase diagrams of the systems dipalmitoylphosphatidylcholine/dipalmitoylphosphatidylethanolamine/H20/LiCl and dlpalmitoylphosphatidylchofine/dipalmitoylphosphatidylethanolanfine/H20/CaC12

showed that the influence of Li +-and Ca2+-ions does not effect fundamental changes in the miscibifity properties of the two amphoteric phospholipids.

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Phase diagrams of pseudo-binary phosphol

Phase diagrams of pseudo-binary phospholipid systems III. Influece of the head group methylation on the miscibility behavior of N-methylated phosphatidylethanolamine mixtures in aqueous dispersions

✍ Hans-Dieter Dörfler; Peter Miethe; Armin Möps 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 549 KB

Five phase diagrams of pseudo-binary phospholipid systems consisting of N-methylated phosphatidylethanolamines with different numbers of methyl groups were investigated and compared. Four of the five phase diagrams showed phase separation in the gel phase. The width and the concentration ranges of t