| 摘要 |
<p>A sterile powder comprising microparticles, 0.1 to 50 'mu'm in diameter, obtainable by spray-drying and cross-linking a water-soluble material having free functional groups, is characterised in that the microparticles are hydrophilic, can be reconstituted in water to give a monodisperse suspension, and have retained said groups available for derivatisation. The particles are linked to drugs or other functional molecules, and used as vehicles in therapy.</p> |
