30results about How to "Strong slow release" patented technology

The invention discloses a freeze-dried nanometer powder injection of ursolic acid and a preparing method thereof. It major composes of active material of ursolic acid, complex vehicle of nanometer powder, excipient of freeze-drying. Compared to other popular preparations, its advantages are high target application of liver, concentrate on the affects, increase curative effect, decrease side effect, high dispersity and stability. It is prepared through dissolving ursolic acid as active raw material in medical organic solvent, adding complex vehicle of bean lecithin and stearic acid, stirring while heating until reaction completed, adding distilled water, adding excipient, stirring while heating until reaction completed, filtering with microporous membrane and freeze-drying the filtrate. Its average particle size is 209.5 mm, drug loading is 25.2%. it is for inhibiting and treating liver cancer, decreasing expression of p53, bcl-2 and topo-II.

The invention belongs to the technical field of organic cultivation substrates, in particular to a green moisture-preserving slow-release composite organic cultivation substrate and a preparation method thereof. In the invention, raw materials such as edible fungus fermented chaff, attapulgite clay and potassium humate are chemically polymerized, physically cross-linked and mixed to obtain an organic cultivation substrate with the function of moisture conservation and slow release. The method of the invention is simple in process and low in cost, and the prepared organic cultivation substrate has high water absorption and slow-release nutrient effects, and overcomes the shortcomings of traditional polymer water-absorbing resins such as single function, poor gelation, difficult degradation, and high preparation cost . The invention also solves the problems of long composting and fermentation period of organic / inorganic compound organic cultivation substrate, easy loss of nutrients and the like. It is suitable for water absorption, water retention, fertilizer retention, and fertilizer release in agricultural and forestry soils. After use, it can improve soil structure, improve crop resistance to drought and saline-alkali, enhance soil water absorption and moisture retention, reduce fertilizer loss and environmental pollution, and significantly increase crop production.

The invention discloses a compound potassium ferrate slow release disinfectant as well as a preparation method and a usage method thereof, and belongs to the field of the advanced treatment of tail water. The compound potassium ferrate slow release disinfectant is prepared from the following preparative raw materials of 20 parts of sodium hydroxide, 10 to 15 parts of potassium hydrate, 10 to 15 parts of calcium hypochlorite, 15 to 18 parts of iron nitrate, 100 to 120 parts of calcium-based bentonite, 100 to 200 parts of beta-cyclodextrin and 10 to 20 parts of epoxy chloropropane. When being used, the compound potassium ferrate slow release disinfectant is used by being combined with 200 to 400 parts of powdery activated carbon and 20 to 40 parts of carboxymethyl cellulose to be made into an activated carbon column with the granularity of 5mm. A water treating agent prepared by the preparation method has good stability and high oxidizability, has persistent oxidizing ability, is persistent in disinfection, is good in effect, does not generate a secondary pollutant, is convenient and quick to use, also hast he ability of removing a little COD (Chemical Oxygen Demand), and can be used for effectively decreasing the chromatic value of the tail water; most raw materials are low-cost and are easily obtained.

The invention relates to the field of compound fertilizers, particularly a cony-hair-modified polyurethane coated high-efficiency slow-release compound fertilizer. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of 1250-2000-mesh kieselguhr, 11-12 parts of dry wormcast, 8-10 parts of clover stover, 10-12 parts of Lemna minor, 3-4 parts of coriander seed, 4-6 parts of sodium pyrophosphate, 2-4 parts of light calcium carbonate, 2-4 parts of ferrous sulfate, 6-8 parts of yellow seriflux, 8-10 parts of wood dust ash, 10-12 parts of calcium hydrogen phosphate dihydrate, 6-8 parts of dehydrated vegetable powder, 2-4 parts of white granulated sugar, 0.1-0.3 part of ammonium persulfate, 3-4 parts of zinc sulfate, 5-6 parts of cluster redpepper leaf, 1-3 parts of silane coupling agent KH550, 0.1-0.2 part of cony hair, 20-23 parts of water-based polyurethane emulsion and 4-5 parts of assistant. The compound fertilizer has the advantages of wide raw material sources and rich and multiple nutrients, and can enhance the activity of soil; in the aspect of the production technique, the kieselguhr and cony-hair-modified polyurethane coating agent are utilized to form dual coatings on the nutrients, and thus, have favorable enduring coating slow-release control capability, so that the nutrient release is enduring and efficient, and the utilization ratio of the fertilizer is high; and the compound fertilizer can obviously enhance the crop yield and improve the product quality.

The present invention provides a sericin-alginate composite hydrogel and a preparation method thereof, the method comprising: 1) weighing the cocoons of silkworm silk fibroin-deficient mutant varieties, extracting with LiBr or LiCl aqueous solution, and then dialysis and purification, Concentrate to obtain a non-degradable sericin aqueous solution with a mass percentage concentration of 1.5-10%; 2) prepare an alginate aqueous solution with a mass percentage concentration of 0.1-10%; 3) make the above-mentioned The sericin aqueous solution and the alginate aqueous solution are mixed at a ratio of 100-0.01:1 to form a sericin-alginate composite hydrogel, and the cross-linking agent includes an ionic cross-linking agent and / or a covalent cross-linking agent. The scheme of the present invention can obtain sericin-alginate composite hydrogel with interpenetrating network, and the obtained composite hydrogel not only has excellent fluorescence characteristics, deformation memory and elastic modulus controllability, but also has good Biocompatibility, cell adhesion, can support cell survival, proliferation and migration for a long time.

The invention provides a chitosan-sericin composite biological scaffold, a preparation method and an application. The invention adopts acetic acid solution as a solvent to dissolve chitosan to obtain a chitosan solution; adopts silkworm cocoons of a silk fibroin-deficient mutant variety silkworm to prepare a sericin aqueous solution; mixes the chitosan solution and the sericin aqueous solution and injects it into a mold adding a cross-linking agent to form a chitosan-sericin composite hydrogel; freeze-drying the chitosan-sericin hydrogel to obtain a chitosan-sericin composite biological scaffold. The invention also provides a composite biological scaffold carrying nerve growth factor NGF for the treatment of peripheral nerve entrapment. The present invention has good biocompatibility, high porosity and degradability, and the degradation product also has neurotrophic effect, and at the same time, the composite scaffold has the functions of antibacterial and anti-adhesion. It can effectively promote the repair of peripheral nerve entrapment injury.