Macedo, Pedro B. Simmons, Joseph H.
Published in
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry
A thermodynamic approach based on the regular solution concept is applied to the description of miscibility gap boundaries in the alkali-borate systems. It is suggested that in each system the structural units which control the entropy of mixing are the stoichiometric compounds at the apparent limit of the alkali-rich edge of the gap, and a complex...
Bordas, S. Geli, M. Casas-Vázquez, J. Clavaguera, N. Clavaguera-Mora, M. T.
Nous obtenons le diagramme de phases et le domaine de formation de verres par trempe à l'air dans ce système par ATD en utilisant comme méthodes complémentaires la microscopie électronique à balayage et la diffraction aux rayons X. Nous nous intéressons aux liens qui peuvent s'établir entre, d'une part, les propriétés des verres observées par ATD, ...
Leger, D. Deutsch, C. Hansen, J.P.
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...
Laheurte, J.P. Noiray, J.C. Romagnan, J.P.
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.
Casagrande, C. Veyssié, M. Finkelmann, H.
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.
Appell, J. Porte, G.
Experimental evidence is herein given of lower critical solution temperatures in high salt aqueous solutions of cetylpyridinium and cetyltrimethylammonium bromide, nitrate and chlorate. The critical behaviour of the solutions is followed using static and dynamic light scattering. The unique feature of this transition lies in the unusually large val...
Bakouche, Ouahid Gerlier, Denis
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...
Beysens, D. Perot, F.
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...
Tiruppathi, Chinnaswamy Alpers, David H. Seetharam, Bellur
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...
Nakatani, Alan I Kim, Hongdoo Han, Charles C
Published in
Journal of research of the National Institute of Standards and Technology
The design and construction of an apparatus for studying the simultaneous small angle neutron scattering (SANS) and steady shear viscosity behavior of polymer melts and concentrated solutions is discussed. Successful operation of the device is demonstrated on a blend of 20 weight percent deuterated polystyrene and 80 weight percent poly(vinylmethyl...
