Apparent ionic charge in electrolyte and polyelectrolyte solutions

Counterion diffusion in heparin solutions

“…We can also show here that there is no difference in behavior between the two counterions Co2+ and Sr2+. The agreement with the PBC values is very good for a polyion radius equal to 6 A, especially for rNa+> 1. Finally, the PBC model properly describes the experimental results. It must be noted that this phenomenon is not predicted by Manning's model of condensation; indeed, according to this theory, the number of uncondensed divalent counterions would be equal whatever may be the ratio of concentrations (see Fig.…”

“…It has been determined by making molecular models of the sugar units in their most extended form, from which we can calculate a value of 30. 6 A for the length of an hexasaccharide unit. (This assumes for the pyranose sugar chains that all the bonds between the monosaccharide units are 1-4 'diequatorial, which is the most stable conformation for a disaccharide unit; in this case the disaccharide length is 10.2 A.…”

On the interaction of single-charged counterions with a macroion in arbitrary media

“…Besides, the other compounds. [1][2][3][4][5] Moreover, even now it is safe to say that the interaction with such a cooperative system as a macromolecule essentially complicates the equipredictions of such models of ionic interactions fail in nonaqueous media and in systems conlibrium (2), which becomes a function of its state.…”

Dispositif de microélectrophorèse utilisant un vélocimètre optique original à réseau de transmission : aspects théoriques et méthodologiques

“…Cette technique, qui nécessite l'emploi de sources monochromatiques très intenses (donc de lasers), fut employée pour la première fois par Yeh et Cummins en 1964 [13]. La vélocimétrie Dopplerlaser, dont il existe différentes variantes [14], a été utilisée sous champ électrique en veine liquide initialement par Ware et Flygare [15,16], et Uzgiris [17,18] ; depuis de nombreux groupes ont développé et adapté cette méthode en fonction des différents types d'échantillons étudiés [19][20][21][22][23][24][25][26][27]. Une mise au point sur la méthode et ses applications a été publiée par Uzgiris [28,29], et Ware et Haas [30].…”