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Pramana

, Volume 19, Issue 1, pp 43–49 | Cite as

Fractional order phase transition in lipid bilayer: dipalmitoyllecithin

  • R C Agnihotri
  • C Mehrotra
  • V D Gupta
  • Vandana Srivastava
Statistical Physics

Abstract

Dipalmitoyllecithin (DPL) shows an order ← → disorder pressure transition which is neither of first order nor of second order but can be treated as a fractional order (3/2 order) transition. The Ising model formalism is adopted for the study of such a system. A suitable equilibrium constant is defined which generates a 3/2 order transition. Transition curves are obtained and compared with the experimental curves of Liu and Kay. Reverse transition curves are also obtained and the system exhibits hysteresis effect. An approximate expression connecting transition pressures at different temperatures is obtained and the calculated and the experimental values are in good agreement.

Keywords

Pressure phase transition dipalmitoyllecithin lipid bilayer gel liquid crystalline 

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References

  1. Agnihotri R C, Mehrotra C, Gupta V D and Srivastava Vandana 1981Pramana 17 361ADSCrossRefGoogle Scholar
  2. Chapman D, Williams R W and Ladbrooke B D 1967Chem. Phys. Lipids 1 445CrossRefGoogle Scholar
  3. Cronan J E and Gelmann E P 1975Bacteriol. Rev. 39 232Google Scholar
  4. Fox C F 1972Sci. Am. 226 30CrossRefGoogle Scholar
  5. Kasteleyn P W 1963J. Math. Phys. 4 287CrossRefADSMathSciNetGoogle Scholar
  6. Lee A G 1975Prog. Biophys. Mol. Biol. 29 3CrossRefGoogle Scholar
  7. Lee A G 1976Nature (London)262 545CrossRefADSGoogle Scholar
  8. Lee A G 1977Biochem. Biophys Acta 472 237Google Scholar
  9. Liu L and Kay R L 1977Biochemistry 16 3484CrossRefGoogle Scholar
  10. Mehrotra C, Agnihotri R C and Gupta V D 1979Natl. Acad. Sci. Lett. 2 75Google Scholar
  11. Nagle J F 1973Proc. Natl. Acad. Sci. (USA) 70 3443CrossRefADSGoogle Scholar
  12. Singer S J 1972Structure and function in biological membranes (ed) L I Rothfield (New York: Academic Press)Google Scholar
  13. Singer S J and Nicolson G L 1972Science 175 720CrossRefADSGoogle Scholar
  14. Stier A and Sackmann E 1973Biochem. Biophys. Acta 311 400CrossRefGoogle Scholar
  15. Zimm B H and Bragg J K 1959J. Chem. Phys. 31 526CrossRefADSGoogle Scholar

Copyright information

© the Indian Academy of Sciences 1982

Authors and Affiliations

  • R C Agnihotri
    • 1
  • C Mehrotra
    • 1
  • V D Gupta
    • 1
  • Vandana Srivastava
    • 1
  1. 1.Department of PhysicsLucknow UniversityLucknowIndia

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