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Phase diagram of the system dihexadecylphosphatidylcholine/dihexadecyl-phosphatidic acid/water/NaOH at pH=14

  • Colloid Science
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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 β′ and theB β-phase in the mixtures was pointed out in the freeze-fracture electron micrographs by the “ripple structure” (P β′-phase) and by the lamellar structure (B β-phase).

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Author notes

  1. H. -D. Dörfler

    Present address: Sektion Chemie der Technischen Universität Dresden, Dresden, GDR

Authors and Affiliations

  1. Abteilung für Elektronenmikroskopie, Bereich Medizin der Friedrich-Schiller-Universität Jena, Jena, GDR

    W. Meyer

  2. Sektion Chemie der Martin-Luther-Universität Halle-Wittenberg, Halle, GDR

    P. Miethe

  3. Sektion Physik der Karl-Marx-Universität Leipzig, Leipzig, GDR

    M. Hentschel

Authors
  1. H. -D. Dörfler
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  2. W. Meyer
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  3. P. Miethe
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  4. M. Hentschel
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Dörfler, H.D., Meyer, W., Miethe, P. et al. Phase diagram of the system dihexadecylphosphatidylcholine/dihexadecyl-phosphatidic acid/water/NaOH at pH=14. Colloid & Polymer Sci 268, 196–201 (1990). https://doi.org/10.1007/BF01513199

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  • DOI: https://doi.org/10.1007/BF01513199

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