| abstract |
This granular material consists of a granular porous support carrying negative or positive charges and coated on its surface with a first impregnating layer of a hydrophilic polymer carrying charges which are opposite to those of the support, the quantity of the said charges present on the said polymer being substantially equal to that of the charges present at the surface of the support; and another layer, attached to the first by irreversible chemical coupling, of another hydrophilic polymer which is functional, namely carrying functional groups imparting to the said functional hydrophilic polymer a specific but reversible affinity for at least one biological substance. Among the applications of this material are mentioned the separation and the purification of antithrombin III and of the coagulation factors (factors II, VII, VIII, IX, X) and the separation of the activated factors from the coagulation (activated II, activated IX and activated X factors) from solutions containing the said nonactivated factors. |