R. Ober
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View article: <i>In situ</i>high-energy x-ray reflectivity studies of hydrophobic polyelectrolytes at the solid/liquid interface
<i>In situ</i>high-energy x-ray reflectivity studies of hydrophobic polyelectrolytes at the solid/liquid interface Open
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View article: Adsorption of hydrophobic polyelectrolytes as studied by \\emph{in situ}\n high energy X-Ray reflectivity
Adsorption of hydrophobic polyelectrolytes as studied by \\emph{in situ}\n high energy X-Ray reflectivity Open
A series of well-defined hydrophilic and hydrophobic polyelectrolytes of\nvarious chain lengths $N$ and effective charge fractions $f_{eff}$ have been\nadsorbed onto oppositely charged solid surfaces immersed in aqueous solutions.\n\\emph{…
View article: Adsorption of hydrophobic polyelectrolytes as studied by \emph{in situ} high energy X-Ray reflectivity
Adsorption of hydrophobic polyelectrolytes as studied by \emph{in situ} high energy X-Ray reflectivity Open
A series of well-defined hydrophilic and hydrophobic polyelectrolytes of various chain lengths $N$ and effective charge fractions $f_{eff}$ have been adsorbed onto oppositely charged solid surfaces immersed in aqueous solutions. \emph{In s…
View article: Binary Separation in Very Thin Nematic Films: Thickness and Phase Coexistence
Binary Separation in Very Thin Nematic Films: Thickness and Phase Coexistence Open
The behavior as a function of temperature of very thin films (10 to 200 nm) of pentylcyanobiphenyl on silicon substrates is reported. In the vicinity of the nematic-isotropic transition we observe a coexistence of two regions of different …
View article: Study of the surface tension of polymer solutions: theory and experiments in theta solvent conditions
Study of the surface tension of polymer solutions: theory and experiments in theta solvent conditions Open
A study of the surface tension of semi-dilute polymer solutions in theta solvent conditions is presented. Theoretical predictions are given for the two cases when the interface is attractive or repulsive. The Cahn approach for the interfac…
View article: Anti Factor Xa Activity In Plasma Following Oral, Pulmonary, Subcutaneous And Intravenous Administration Of Cd5000 Low Molecular Weight Heparin And Commercial Heparin To Rats, Rabbits And Dogs
Anti Factor Xa Activity In Plasma Following Oral, Pulmonary, Subcutaneous And Intravenous Administration Of Cd5000 Low Molecular Weight Heparin And Commercial Heparin To Rats, Rabbits And Dogs Open
CD5000 heparin (LMWH) is a low molecular weight heparin fraction, ave. mol wt. ∼ 5100. Plasma levels of antiFactor Xa activity (XaA) after iv, pulmonary, sc and oral administration of LMWH and commercial heparin (CH) were examined in rats,…
View article: Structure of microemulsions: use of a variable-contrast method applied to neutron scattering
Structure of microemulsions: use of a variable-contrast method applied to neutron scattering Open
Microemulsions are colloidal systems which are made by a dispersion of minute droplets (a few hundred Å in diameter) of one component (water) in a continuous medium formed by another immiscible component (e.g. oil); the droplets are surrou…
View article: Study of structure and electrical conductivity in microemulsions : Evidence for percolation mechanism and phase inversion
Study of structure and electrical conductivity in microemulsions : Evidence for percolation mechanism and phase inversion Open
We present a study of structure and electrical conductivity in concentrated microemulsions. In the concentration range where the structure of the droplet is unchanged, the giant changes of the conductivity over 5 decades are interpreted in…
View article: Shape change of the flexible polymer in solution with increasing concentration
Shape change of the flexible polymer in solution with increasing concentration Open
2014 Une expérience de diffusion de neutrons par des mélanges de polystyrènes deutériés et protonés en solution dans le sulfure de carbone a permis d'observer l'évolution de la configuration de la chaine en fonction de la concentration.La …
View article: Study of polymer solution by small-angle neutron scattering in the intermediate momentum range
Study of polymer solution by small-angle neutron scattering in the intermediate momentum range Open
In the investigation of polymer solutions by small-angle neutron or X-ray scattering, the intermediate momentum range corresponds to the distance between the radius of gyration RG and the statistical subunit length l of the polymer chain. …
View article: Neutron diffraction patterns of labelled polymer chains in the bulk
Neutron diffraction patterns of labelled polymer chains in the bulk Open
The neutron diffraction patterns for labelled polymer chains in the bulk are investigated in the smallangle and the wide-angle scattering ranges.Using the principle of incompressibility, it is possible to take into account the environment …
View article: Dimensions of molecular chains in the bulk and solutions
Dimensions of molecular chains in the bulk and solutions Open
The neutron diffraction patterns for labelled polymer chains in the bulk are investigated in the smallangle and the wide-angle scattering ranges.Using the principle of incompressibility, it is possible to take into account the environment …