Abstract: A delivery system is provided. The delivery system includes a carrier or an active compound and a glutathione or a glutathione derivative grafted thereon. The invention also provides a compound including a moiety comprising a vitamin E derivative or a phospholipid derivative, a polyethylene glycol (PEG) or a polyethylene glycol derivative bonded thereto, and a glutathione (GSH) or a glutathione derivative bonded to the polyethylene glycol or the polyethylene glycol derivative.

Abstract: A delivery system is provided. The delivery system includes a carrier or an active compound and a glutathione or a glutathione derivative grafted thereon. The invention also provides a compound including a moiety comprising a vitamin E derivative or a phospholipid derivative, a polyethylene glycol (PEG) or a polyethylene glycol derivative bonded thereto, and a glutathione (GSH) or a glutathione derivative bonded to the polyethylene glycol or the polyethylene glycol derivative.

Abstract: A delivery system is provided. The delivery system includes a carrier or an active compound and a glutathione or a glutathione derivative grafted thereon. The invention also provides a compound including a moiety comprising a vitamin E derivative or a phospholipid derivative, a polyethylene glycol (PEG) or a polyethylene glycol derivative bonded thereto, and a glutathione (GSH) or a glutathione derivative bonded to the polyethylene glycol or the polyethylene glycol derivative.

Abstract: A delivery system. The delivery system includes a carrier having a surface, an active compound comprising small molecule compounds or peptides for use as an analgesic encapsulated into the carrier, and a glutathione or a glutathione derivative grafted on the surface of the carrier. The invention also provides a method of analgesia including conducting the active compound to a subject.

Abstract: A delivery system is provided. The delivery system includes a carrier or an active compound and a glutathione or a glutathione derivative grafted thereon. The invention also provides a compound including a moiety comprising a vitamin E derivative or a phospholipid derivative, a polyethylene glycol (PEG) or a polyethylene glycol derivative bonded thereto, and a glutathione (GSH) or a glutathione derivative bonded to the polyethylene glycol or the polyethylene glycol derivative.

Abstract: A delivery system. The delivery system includes a carrier having a surface, an active compound comprising small molecule compounds or peptides for use as an analgesic encapsulated into the carrier, and a glutathione or a glutathione derivative grafted on the surface of the carrier. The invention also provides a method of analgesia including conducting the active compound to a subject.

Abstract: A polymeric microsphere. The polymeric microsphere comprises a first polymer, a layer formed on the surface of the first polymer, and a second polymer formed on the layer. The invention also provides a method for preparing the polymeric microphere by an aqueous-two-phase emulsion process.

Abstract: A method for preparing polymeric microsphere by an aqueous two phase emulsion process. A first polymer aqueous solution is provided and the first polymer includes a functional group capable of forming cross-linking. A second polymer aqueous solution is provided, which is acidic and miscible with the first polymer aqueous solution. The first and second polymer aqueous solutions are mixed and stirred to form an emulsion, such that the first polymer solution forms a dispersed phase in a continuous phase of the second polymer solution. The dispersed phase includes a plurality of the first polymeric microsphere, and a solidification film formed by cross-linking of the functional group constitutes a microsphere surface. Finally, the first polymeric microsphere are separated out.