Pore- and Core-Scale Insights of Nanoparticle-Stabilized Foam for CO-Enhanced Oil Recovery.

Nanoparticles have gained attention for increasing the stability of surfactant-based foams during CO foam-enhanced oil recovery (EOR) and CO storage. However, the behavior and displacement mechanisms of hybrid nanoparticle-surfactant foam formulations at reservoir conditions are not well understood. This work presents a pore- to core-scale characterization of hybrid nanoparticle-surfactant foaming solutions for CO EOR and the associated CO storage.

[Prevalence of anti-HCV antibodies and seroconversion incidence in five haemodialysis units in Morocco].

Dialysis patients are among groups at risk for development of hepatitis C infection (HCV). The aim of the study was to evaluate the prevalence and the incidence of seroconversion for HCV in five haemodialysis units in Morocco. The study was conducted during the period from September 2003 to September 2004.

[Study of the electronic transitions of azulene and several of it's derivitives and their auto-association by the monopole-dipole atomic interaction (AMDI) model].

The corresponding hydrogen, carbon and nitrogen atomic dipolar polarisabilities and effective charges given by Fraga are used for the determination of theoretical UV absorption spectra of azulene, 1,3-diaza-azulene and 2-phenyl-1,3-diaza-azulene and their self-associations. These spectra are obtained for the first time using the atom monopole dipole interaction model and compared to those given experimentally by other authors.

[UV absorption spectra of 1,1'-binaphtyle and 2,2'-binaphtyle molecules and their self-associations from the atom monopole-dipole interaction (AMDI) model].

The Atom Monopole-Dipole interaction (AMDI) model is used for the first time in calculation of UV absorption spectra of 1,1'-binaphtyl and 2,2'-binaphtyl and their self-associations for the case of frequency-dependant atom polarisability with Lorentzian band shape. UV absorption spectra are obtained from a set of electronic normal modes. The variation of spectra with the conformation of these molecules concord with the results of the medium effect on the corresponding electronic transitions.