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Dynamics of Structural Transformations between Lamellar and Inverse Bicontinuous Cubic Lyotropic Phases

Dynamics of Structural Transformations between Lamellar and Inverse Bicontinuous Cubic Lyotropic Phases,10.1103/PhysRevLett.96.108102,Physical Review

Dynamics of Structural Transformations between Lamellar and Inverse Bicontinuous Cubic Lyotropic Phases   (Citations: 16)
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The liquid crystalline lamellar (Lalpha) to double-diamond inverse bicontinuous cubic (QIID) phase transition for the amphiphile monoelaidin in excess water exhibits a remarkable sequence of structural transformations for pressure or temperature jumps. Our data imply that the transition dynamics depends on a coupling between changes in molecular shape and the geometrical and topological constraints of domain size. We propose a qualitative model for this coupling based on theories of membrane fusion via stalks and existing knowledge of the structure and energetics of bicontinuous cubic phases.
Journal: Physical Review Letters - PHYS REV LETT , vol. 96, no. 10, 2006
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    • ...It is commonly accepted that ribosomal activity shuts down below 200 MPa, proteins denature at 2–6 GPa, and membranes lose their bilayer structure by several gigapascals 21 275...

    Russell J. Hemley. Percy W. Bridgman's second century

    • ...Also with respect to the kinetics of the folding reaction, pressure studies are of particular use, as they allow to evaluate the volume profile during the folding process (or other biomolecular reactions (Conn et al., 2006, 2008; Winter et al., 2007; Woenckhaus et al., 2000) and to characterize the nature of the barrier to folding or unfolding and the corresponding transition state...

    Roland Winter. Exploring the Energy and Conformational Landscape of Biomolecules Unde...

    • ...Also recently, Conn et al. [49] reported on the dynamics of the phase transition of the fluid fully hydrated La to cubic assemblies with Pn3m (diamond type, CD) and Im3m (primitive type, CP) symmetries in the binary non-dispersed ME/water system by carrying out both temperature- and pressure-jump investigations...
    • ...Therefore, before data acquisition of the kinetic structural transitions by temperature- and pressure-jump experiments, the fully hydrated system were thermally cycled several times between 220 and 70uC in order to reduce the number of oversized particles [49]...
    • ...It is worthy noting though, that Templer and colleagues [49] observed under condition of full hydration during the time course of temperaturejump experiments a shrinkage in the lattice parameter of the La phase and the existence of a highly swollen intermediate cubic phase...
    • ...This fits to the interpretation is given in [49], in which it was argued that ME forms in water closely packed onion vesicles consisting of concentric bilayers...
    • ...We also recall that Conn et al. [49] reported on a high particle size distribution in the fully hydrated binary ME/water system...

    Anan Yaghmuret al. Self-Assembly in Monoelaidin Aqueous Dispersions: Direct Vesicles to C...

    • ...Complex fluids containing an amphiphilic molecular species and water and/or oil undergo self-assembly to form mesophases which are periodic at the macro-scale [1, 2, 3]. In these ternary liquid crystalline mesophases, the periodicity may extend only in one dimension, for example in the lamellar phase or they can be periodic in two dimensions such as in the hexagonal phase or the periodicity can extend in all three dimensions, as in the ...

    R. S. Saksenaet al. Parallel Lattice-Boltzmann Simulations for the Investigation of Cubic ...

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