Interprétation selon le modèle ellipsoïdal des conductibilités de quelques variantes d’héparine de sodium
Written by sctunisie no commentsIn this work we show from comparison between experimental and theoretical conductibilities of Sodium Heparin in aqueous dilute solutions according to the ellipsoidal model, that for long chain (Heparin RB21055, LS = 160 A°, ZS = -55), the transition from stretched to coiled configuration occurs progressively with the increase of the Na+ concentration due to the ionic condensation and the screen effect. In contrast, for relatively short chain (Heparin H5027 and H5271, LS = 64 A°, ZS = -22) all the configurations are equivalent. In particular, the polyion could be assimilated to a charged sphere with a radius of about 17 A°.
A. Ghazouani, S. Boughammoura, J. M’halla
héparine, conductibilité, condensation ionique, élecrophorétique, relaxation ionique, friction diélectrique, conformation, ellipsoïdale
Pages: 95-108
