Adsorbent for removing a harmful substance to be removed from body fluid such as blood or plasma composed of a porous hard gel on which a ligand having an affinity for the harmful substance is immobilized. The adsorbent is suitable for selective removal of harmful substances such as VLDL, LDL, harmful...http://www.google.fr/patents/US4576928?utm_source=gb-gplus-shareBrevet US4576928 - Adsorbent and process for preparing the same