A composite paramagnetic particle and method of making are provided. In one aspect of the invention, a particle comprising a multitude of submicron polymer bead aggregates covalently cross-linked to each other to form larger diameter particles is presented. Distributed throughout the composite paramagnetic...http://www.google.fr/patents/US6682660?utm_source=gb-gplus-shareBrevet US6682660 - Ultrasonically generated paramagnetic polymer particles
