Phase diagram of the system dihexadecylphosphatidylcholine/dihexadecyl-phosphatidic acid/water/NaOH at pH=14 |
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| Authors: | H -D Dörfler W Meyer P Miethe M Hentschel |
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| Institution: | (1) Present address: Sektion Chemie der Technischen Universität Dresden, Dresden, GDR;(2) Abteilung für Elektronenmikroskopie, Bereich Medizin der Friedrich-Schiller-Universität Jena, Jena, GDR;(3) Sektion Chemie der Martin-Luther-Universität Halle-Wittenberg, Halle, GDR;(4) Sektion Physik der Karl-Marx-Universität Leipzig, Leipzig, GDR |
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| Abstract: | Differential-scanning-calorimetry, freeze-fracture electron microscopy, and31P-NMR spectroscopy were used to study the lyotropic and thermotropic properties of the system dihexadecylphosphatidylcholine/dihexadecylphosphatidic acid/water/ NaOH in dispersion with excess water at pH=14. The phase diagram showed that both phospholipids are demixed nearly completely in the gel phase. The coexistence of theP
  and theB
-phase in the mixtures was pointed out in the freeze-fracture electron micrographs by the  ripple structure (P
-phase) and by the lamellar structure (B
-phase). |
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| Keywords: | Phasediagram phospholipids calorimetry freeze-fracture electronmicroscopy NMR 31Pdemixing |
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