Electronic transport in dense, fully ionized hydrogen-helium mixtures is investigated within the framework of the Faber-Ziman formalism. The electrical conductivity of the degenerate, nearly free electron gas is calculated, using the partial ionic structure factors obtained from numerical solutions of the HNC equations. The possible influence of th...
We present third sound velocity measurements in thin films of 3He- 4He mixtures down to 0.1 K. The low temperature behaviour of this velocity suggests the existence of a phase separation perpendicular to the walls even for a film mixture of 3.7 layer thickness.
We have studied the phase diagram of a binary system, constituted with a side-chain mesomorphic polymer and a monomer liquid crystal, very similar to the mesogenic groups in the polymer. The main results is the existence of a gap of miscibility in the nematic state, leading to the coexistence, at a same temperature, of two nematic phases.
Published in Analytical Biochemistry
An efficient and rapid method to separate the aqueous phase from lipoidal lamellae after mechanical disruption of multilamellar liposomes with preservation of the phospholipid bilayer organization has been designed. Liposome suspensions were subjected to a few short bursts of sonication at a temperature below the transition temperature ( T c) of th...
Light scattering techniques have been used to study the phase separation of a sheared binary fluid of nitrobenzene and n-hexane at critical composition. Shear was seen to prevent the development of decomposition. The system is quenched when the shear is removed, allowing anisotropic spinodal decomposition rings to appear. When a periodic (frequency...
Published in Analytical Biochemistry
Rat intestinal microvillus membrane contains at least 24 polypeptides, of which 18 can be solubilized using Triton X-114 at 4°C. Upon phase separation at 32°C, 11 proteins separated nearly completely into the detergent-rich phase, while 9 proteins were found exclusively in the aqueous phase. Enzymes which were uniquely included in the detergent pha...
Late-stage coarsening in a 2D binary mixture has been investigated via direct imaging of "bubble" domains in an amphiphilic monolayer at an air-water interface. In a regime with growth exponent n≃0.28 for the mean domain radius, the radius distribution exhibits dynamic scaling, closely approaching a Gaussian shape. The local structure of disordered...
Several rubber (acrylonitrile-butadiene copolymer) or thermoplastic (polyethersulfone) additives bearing different chain ends were introduced into pure aromatic dicyanates. We studied the influence of these initially misciblemodifiers on the polymerization kinetics, as a function of their chemical structure and concentration. It appears that apart ...
A maximum entropy description is developed for disordered planar patterns of droplets and applied to the analysis of such patterns formed in a two-dimensional binary mixture during late-stage coarsening. Global correlations, arising from local "packing" constraints, are shown to produce a virtually symmetric shape of the scaled droplet radius distr...
We study the decay of the probability for a non-Markovian stationary Gaussian walker not to cross the origin up to time $t$. This result is then used to evaluate the fraction of spins that do not flip up to time $t$ in the zero temperature Monte-Carlo spin flip dynamics of the Ising model. Our results are compared to extensive numerical simulations...
