| 摘要 |
Semipermeable capsules in a dehydrated and deflated form can be loaded with a chemically active substance to be released over time by a method which first involves gradually deflating and dehydrating the capsules by repeated washing with a solution containing a dehydrating agent and subsequently the deflated capsules are soaked in a solution containing the substance to be encapsulated to load them. After loading, the permeability of the capsule membranes may be adjusted to accommodate the requirements of the end use. The loaded capsules may be used for a variety of purposes, including use as a bioimplantable drug or biochemical delivery system. The deflated capsules can also be used to separate low and high molecular weight substances contained in a liquid mixture. |
