3results about How to "Advanced preparation technology" patented technology

The application belongs to the technical field of biological medical materials, and discloses a polydopamine modified modified nano-graphyne and a preparation method and application thereof. In the method, the polydopamine coating is combined with the nano-graphyne for the first time to construct a GDY@PDA composite system, and the core defects of the blocky graphyne, such as easy agglomeration, poor water solubility and insufficient biocompatibility, are solved. The graphyne-based material is applied to the near-infrared two-region photothermal regulation of neural cell calcium influx for the first time, the calcium ion channel is activated through the local thermal effect of the material, and precise, remote and reversible calcium influx regulation is realized; the limitation that the traditional biocompatibility modification is easy to fall off and difficult to functionalize is broken through, the polydopamine modification makes the material have both photothermal efficiency and biological safety, and the application of the graphyne in the treatment of neural diseases (such as neural cell injury repair) is expanded.

This invention relates to the field of ginseng extract technology, specifically to a composition containing ginseng extract and its preparation method. The provided composition containing ginseng extract comprises the following substances in parts by weight: 5-30 parts of a ginseng peptide composition with a molecular weight less than 3000 Da; 1-15 parts of a saponin composition composed of rare ginsenosides Rg3, Rg5, and Rh2; 3-10 parts of a ginseng polysaccharide-selenium nanocrystal composition; 1-5 parts of *Lactobacillus plantarum* P-8 lyophilized powder; 0.5-3 parts of sodium tanshinone; 3-20 parts of a prebiotic composition; and 0.1-5 parts of a vitamin composition. A method for preparing the aforementioned ginseng extract composition is also provided. The prepared ginseng extract composition exhibits excellent properties and has good application prospects.

The invention belongs to the technical field of catalyst preparation, and particularly discloses a high-catalytic-efficiency non-noble-metal-based bifunctional catalyst and a preparation method and application thereof.The preparation method comprises the following steps that transition metal salt and halogen element salt are dissolved in a mixed reagent of ethyl alcohol and water, the mixed reagent is dropped on a conductive substrate, and the conductive substrate is dried to obtain the high-catalytic-efficiency non-noble-metal-based bifunctional catalyst. The preparation method comprises the following steps: adding a halogen-doped non-noble metal-based bifunctional catalyst into a reaction kettle, carrying out a solvothermal reaction on a heating plate at a heating temperature of 80-120 DEG C for 5-10 h, drying the obtained material, and carrying out plasma treatment to obtain the halogen-doped non-noble metal-based bifunctional catalyst. By adopting the high-catalytic-efficiency non-noble metal-based bifunctional catalyst as well as the preparation method and the application thereof, the problems that most high-efficiency catalysts in the ENRR field in the prior art are composed of noble metals, are high in cost and are not beneficial to industrial treatment of nitrogen-containing wastewater; the problem that a noble metal-based catalyst is easily subjected to S poisoning in an anode SOR and is rapidly inactivated is solved, and the non-noble metal-based bifunctional catalyst with high catalytic efficiency is constructed.