2results about How to "Good spherical shape" patented technology

The application discloses a long-acting hydrogen-releasing microsphere in the stomach and use of the microsphere as a drug in treatment of gastritis, and belongs to the field of pharmaceutical preparations and hydrogen treatment. The composition provided by the application is composed of a hydrogen production micro-particle as a core and a sustained-release agent composed of hydroxypropyl methyl cellulose and ethyl cellulose. By selecting specific components and processes, the microsphere has good floatability and long-acting hydrogen-releasing capacity. The microsphere can float in the gastric juice environment and gradually release hydrogen, so that the sustained anti-oxidation and anti-inflammatory effects are realized, and the microsphere is suitable for treatment of gastric inflammation.

The invention provides a method for preparing small-particle-size spherical silver powder through in-situ nucleation, and the method comprises the following steps: mixing a first dispersing agent solution with an alkaline substance to obtain a nucleation inducer; mixing a second dispersing agent solution with the nucleation inducer, then mixing with the first oxidizing agent solution in a stirring state, and carrying out an in-situ reaction to obtain a nucleation solution; simultaneously adding a second oxidant solution and a reducing agent solution into the nucleation solution, mixing and reacting to obtain a mixed solution; and the mixed solution is subjected to solid-liquid separation, and the spherical silver powder is obtained. According to the method, the preparation process is easy to operate and continuous, crystal nucleuses can be formed in situ under the conditions of not additionally preparing and adding seed crystals and not introducing other dispersing agents, and the small-particle-size silver powder is rapidly prepared. The prepared spherical silver powder has good spherical morphology and uniform and concentrated particle size distribution.