Showing papers by "Ichiji Tasaki published in 2005"
TL;DR: Repetitive abrupt structural changes can be produced in a small piece of cross-linked polyacrylate hydrogel by exchanging the divalent counter-ions in the superficial gel layer to monovalent cations.
21 citations
TL;DR: In this article, strong lyotropic effects of anions, such as fluoride, phosphate, aspartate and chloride, on the repetitiveness of abrupt structural changes in the gel strands are demonstrated.
Abstract: Anionic polyelectrolyte gels, synthetic or natural, undergo abrupt structural changes when the monovalent counterions in the gel, e.g., Na + , are replaced with divalent cations, e.g., Ca 2+ . These structural changes are caused by the preferential binding of Ca to the polyelectrolyte chains and the ability of Ca 2+ to form crosslinks between two neighboring chains. Strong lyotropic (Hofmeister) effects of anions, such as fluoride, phosphate, aspartate and chloride, on the repetitiveness of abrupt structural changes in the gel strands are demonstrated. These findings have important biological implications.
4 citations