46results about How to "Overcoming toxicity" patented technology

A slowly-releasing anticancer composite medicine is composed of the hormone-kind anticancer medicine chosen from steroid-type hormone and hormone antagon for regulating the cell reproduction of hormone dependent tumor and the medicinal additive chosen from biocompatible and biodegradable high-molecular polymer for slowly releasing said anticanser medicine toward tumor.

An anticancer composition medicine is composed of the antimitosis medicine for suppressing the reproduction of tumor cells and the medicinal additive chosen from the biocompatible and biodegradable high-molecular polymer for slowly releasing said antimitosis medicine toward the tumor.

The invention relates to a preparation method of polyimide fibers containing symmetric bispyrimidine structures. The preparation method comprises steps as follows: 2,2'-(1,4-phenylene)bis(5-(4-aminophenyl)) pyrimidine and anhydrous stannous chloride are added to polyphosphoric acid, aromatic dianhydride monomers and P2O5 are sequentially added, the mixture reacts at the temperature of 170-200 DEG C for 4-6 h, then, the mixture is heated to 200-240 DEG C and reacts for 3-6 h, and a liquid crystal type polyimide spinning solution is obtained; a twin-screw extruder is adopted, and polyimide nascent fibers are obtained from the liquid crystal type polyimide spinning solution through spinning, multi-coagulation bath forming, water washing and winding; three-level hot drafting is performed on the polyimide nascent fibers under the protection of nitrogen after the polyimide nascent fibers are dried, and the polyimide fibers are obtained. The polyimide fibers prepared with the method have excellent mechanical performance and have wide application prospect, and the synthesis and processing problems that conventional phenol and phenyl polyhalide type solvents have high toxicity, aprotic solvents are difficult to remove with a two-step processing method and the like are solved.

The present invention relates to an anti-cancer medicine composition which can be slowly-released in human body. Said composition comprises medicinal auxiliary material and plant alkaloids anti-cancer medicine, in white the plant alkaloids anti-cancer medicine can inhibit hyperplasia of tumor, and the medicinal auxiliary material mainly can be bio-compatible high-molecular polymer which can be degraded and absorbed, in the course of its degradation and absorption the plant alkaloid can be slowly released in tumor locality, so that at the same time of obviously reducing systematic toxic it can retain effective medicine concentration in tumor locality so as to obtain good therapeutic effect.

The invention provides a method for electrochemically preparing boron-doped graphene through double graphite electrodes, and belongs to the technical field of controllable preparation of graphene materials and doping control of the graphene materials. The boron-doped graphene is prepared in one step by taking an aqueous solution of a soluble salt of which anions contain boron elements as an electrolyte and graphite foil as a raw material and adopting a double-graphite-foil electrochemical stripping method. As double graphite foils are used as positive and negative electrodes respectively, theuse of noble metal electrodes is reduced, and the cost is effectively reduced. The method can be simply implemented in a common beaker or glassware. The preparation method is green and environment-friendly, equipment is simple, operation time is short, operation is convenient, the process is simple and easy to amplify, and the prepared boron-doped graphene has the advantages of being high in quality, good in conductivity, excellent in dispersity in water and the like.

A slowly-releasing anticanser composite medicine implanted in human body is composed of the anticancer medicine prepared from implantation agent, slowly releasing agent and dichloroethane-kind medicine for suppressing the growth of tumor cells and the medicinal additive chosen from biocompatible and biodegradable polymer for slowly releasing said anticancer medicine toward tumor.