摘要:
Microspheres, of controllable shape and size, encapsulating active ingredients, are made by the internally controlled gelation of an emulsion including a water-soluble polysaccharide, a salt of a di- or trivalent metal cation, a polymerization inhibitor, water, a water-immiscible solvent (as a non-aqueous phase), and the active ingredient. The components of the aqueous phase, containing the water-soluble polysaccharide, polymerization inhibitor, di- or trivalent metal salt, active substance, and water, are blended together. This aqueous phase is then gradually mixed with the oil phase and agitated to form an emulsion. After sufficient time for solidification, the emulsion is broken and the resulting microspheres are collected. The active ingredient may be various substances, including live microorganisms.
摘要:
A method of fabricating hydrogel particles of controlled size within liposomes is provided, which entails encapsulating an effective amount of one or more hydrogel-forming substances in liposomes in a liquid medium, removing any unencapsulated hydrogel-forming substances from the liquid medium, adding initiator to the liquid medium and into the liposomes, thereby initiating reaction of the one or more hydrogel-forming substances, and removing any extra-liposomal initiators from the medium.
摘要:
A method of fabricating hydrogel particles within liposomes, which entails: a) encapsulating an effective amount of each of one or more hydrogel substances and one or more release agents in liposomes in a liquid medium, b) removing any unencapsulated hydrogel substances and release agents from the liquid medium, c) adding initiator to the liquid medium and into the liposomes, thereby initiating reaction of the one or more hydrogel substances, whereby hydrogel particles are formed in the liposomes, and d) removing any extra-liposomal initiator from the medium.