Navegação por Assunto "Colóides"
Resultados 21-28 de 28
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Ressuscitação hipertônica com salina/dextran em pacientes sépticos graves estáveis : um estudo randomizado
(2001) [Dissertação]Objetivo: estudar os efeitos hemodinâmicos da solução salina hipertônica/dextran, comparada com solução salina normal, em pacientes com sepse grave. Modelo: ensaio clínico randomizado, prospectivo, duplo-cego, controlado. ... -
Screening of spherical colloids beyond mean field : a local density functional approach
(2004) [Artigo de periódico]We study the counterion distribution around a spherical macroion and its osmotic pressure in the framework of the recently developed Debye-Hückel-hole-cavity (DHHC) theory. This is a local density functional approach which ... -
A self-consistent renormalized jellium approach for calculating structural and thermodynamic properties of charge stabilized colloidal suspensions
(2009) [Artigo de periódico]An approach is proposed which allows to self-consistently calculate the structural and the thermodynamic properties of highly charged aqueous colloidal suspensions. The method is based on the renormalized jellium model ... -
Smoluchowski equation and the colloidal charge reversal
(2006) [Artigo de periódico]Smoluchowski equation and the Monte Carlo simulations are used to study the conditions leading to the reversal of the electrophoretic mobility. Zeta (ζ) potential is identified with the diffuse potential at the shear plane ... -
The renormalized jellium model for spherical and cylindrical colloids
(2007) [Artigo de periódico]Starting from a mean-field description for a dispersion of highly charged spherical or (parallel) rodlike colloids, we introduce the simplification of a homogeneous background to include the contribution of other polyions ... -
The renormalized Jellium model of colloidal suspensions with multivalent counterions
(2010) [Artigo de periódico]An extension of the renormalized Jellium model which allows to study colloidal suspensions containing trivalent counterions is proposed. The theory is based on a modified Poisson–Boltzmann equation which incorporates the ... -
Third-order nonlinear optical response of colloidal gold nanoparticles prepared by sputtering deposition
(2013) [Artigo de periódico]The nonlinear optical responses of gold nanoparticles dispersed in castor oil produced by sputtering deposition were investigated, using the thermally managed Z-scan technique. Particles with spherical shape and 2.6 nm of ... -
Weak and strong coupling theories for polarizable colloids and nanoparticles
(2011) [Artigo de periódico]A theory is presented which allows us to accurately calculate the density profile of monovalent and multivalent counterions in suspensions of polarizable colloids or nanoparticles. In the case of monovalent ions, we derive ...