| 摘要 |
<p>A method for preparing a shell or porous gel from glass particles involves the steps of: (a) forming particles of an alkali borate glass composition containing one or more cations which react with an aqueous solution containing an anion reactive with the cation to form an aqueous insoluble material having a solubility limit of less than about 0.01 wt. %; (b) immersing the glass composition particles in the aqueous solution to cause reaction of the particles to form the insoluble material which is essentially the same size as the as-made particles with the alkali and boron dissolving from the glass particles; and (c) allowing the reaction to continue until the alkali and boron are substantially completely dissolved from the glass particles and the resulting product is composed of a shell filled with colloidal particles or gel, concentric shells or a porous, homogeneous gel, the product being nonradioactive and not adapted for neutron irradiation. A method for administering a chemotherapeutic drug using the product of the above method is also disclosed.</p> |
