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

The invention relates to the field of composite fertilizers, and concretely relates to a long-acting sustained-release composite fertilizer rich in organic materials. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of 1250-2000 mesh diatomite, 12-15 parts of ammonium humate, 8-10 parts of triple superphosphate, 5-6 parts of pumace, 6-8 parts of bean dregs, 4-5 parts of grass meal, 5-7 parts of lees vinegar, 1-2 parts of white sugar, 0.5-1 part of xylose, 18-20 parts of urea, 5-6 parts of borax, 8-10 parts of sodium carboxymethylcellulose, 6-8 parts of redispersible latex powder, 2-3 parts of ammonium ferric citrate, 8-10 parts of ammonium dihydrogen phosphate, 0.1-0.2 part of calcium stearate and 4-5 parts of an auxiliary agent. The raw materials of the composite fertilizer are rich in multiple organic materials, so that the soil activity is effectively improved, and the adverse influence of long-term fertilization on soil is improved; dual cladding on nutrient is formed by utilizing diatomite and a sustained-release coating agent in the production technology, so that nutrient is not easy to loss, the utilization rate is greatly improved; and release of nutrient is long-acting and efficient, and sufficient nutrient and balanced soil environment help to improve both crop output and quality, and the plantation benefit is increased.

The invention relates to the field of compound fertilizers, and particularly relates to a slow-release compound fertilizer containing natural worm-expelling components. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of kieselguhr of 1250-2000 meshes, 10-12 parts of potassium sorbate, 16-19 parts of ammonium dihydrogen phosphate, 4-5 parts of magnesium chloride, 10-12 parts of sodium pyrophosphate, 22-23 parts of well-rotted farmyard manure, 6-8 parts of dried tempeh fine powder, 4-6 parts of formosan lattuce herb leaf and stem, 5-6 parts of Tephrosia purpurea stem and leaf, 4-5 parts of burdock dreg powder, 1-3 parts of starch aluminum octenylsuccinate, 1-2 parts of potassium persulfate, 10-12 parts of acrylamide, 1-2 parts of negative ion powder, 2-4 parts of medical stone powder, 6-8 parts of polymeric ferric silicate sulfate and 4-5 parts of assistant. According to the invention, the compound fertilizer formula has wide raw material sources and multiple nutrients; slurry of the formosan lattuce herb leaf and stem and the Tephrosia purpurea stem and leaf contains natural worm-expelling components, so that worms and ants can be prevented from nibbling the fertilizer; and by technically using the kieselguhr and the slow-release coating agent containing the negative ion powder, the nutrients are doubly coated, so that the nutrients are less prone to loss, and the fertilizer efficiency can last longer. In practical application, the compound fertilizer can obviously improve the yield and quality of crops and increase economic benefits.

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 discloses a production method of a medical flexible gradual-change vessel catheter and belongs to the technical field of medical equipment production. The production method includes: using nylon block copolymer, hydroxyethyl methylacrylate-methyl methacrylate and collagen as the raw materials; using a LiBr or LiCl aqueous solution to extract the crushed and sterilized collagen; centrifuging; performing dialysis in ultrapure water to obtain dialysate; centrifuging the obtained dialysate to remove precipitates, and concentrating to obtain a mixed collagen aqueous solution; adding acovalent cross-linking agent, sufficiently and evenly mixing, and injecting into a sterile die to obtain a semi-finished flexible gradual-change vessel catheter; placing into a sterile plate, freezing, performing overnight freeze drying in a freeze vacuum drying machine under zero degree, and taking out the catheter obtained after the freeze drying from the die. The flexible gradual-change vesselcatheter produced by the method is good in bioactivity and biocompatibility, capable of achieving in-vivo natural degradation and capable of promoting the regeneration of long-distance injured peripheral nerves.

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 relates to the field of compound fertilizers, and particularly relates to a low-cost slow-release compound fertilizer containing an okra seed. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of kieselguhr of 1250-2000 meshes, 12-14 parts of potassium chloride, 8-10 parts of ordinary superphosphate, 25-28 parts of urea, 6-8 parts of ammonium hydrogen carbonate, 12-15 parts of diammonium hydrogen phosphate, 2-4 parts of sodium tetraborate, 12-15 parts of earthworm cast, 18-20 parts of pond silt, 8-10 parts of tea pulp, 2-4 parts of shrimp shell meal, 1-2 parts of sodium naphthaleneacetate, 4-5 parts of Chinese cabbage dreg, 2-3 parts of amino-oligosaccharin, 6-8 parts of okra seed, 10-12 parts of water-dispersible epoxy modified acrylate resin solution, 1-3 parts of dimethyl silicone oil, 1-2 parts of sodium caseinate, 2-3 parts of Pulullan, 2-4 parts of zinc gluconate, 6-8 parts of table vinegar and 4-5 parts of assistant. According to the invention, the compound fertilizer is wide in raw material sources, cheap and accessible; and by technically using the kieselguhr and the coating agent, the nutrients are doubly coated, so that the nutrients (especially minor elements) therein can be effectively protected, and the fertilizer efficiency can last longer. Besides, the compound fertilizer can improve the yield and quality of crops, thereby truly realizing low cost and high profit.

The invention relates to a method for preparing monodisperse mesoporous bioactive glass microspheres through a template method, belonging to the field of biomedical materials. A silicon source, a phosphorus source, a calcium source, an iron source, an alkali metal or alkaline-earth metal source is adopted as a raw material, a triblock copolymer or alkyl quaternary ammonium salt type cation is taken as a surfactant, and an in-situ sol-gel method is performed in a three-dimensional ordered macroporous polymer or a carbon template to synthesize the ordered mesoporous bioactive glass microspheres. The bioactive glass microspheres prepared according to the invention have the characteristics of good biocompatibility, biodegradability, ordered mesoporous structure, higher specific surface area, magnetism, monodispersibility of particles, environmental stability and the like; and in comparison with various medicament delivery carrier materials which are extensively researched currently, the bioactive glass microspheres have more comprehensive advantages and further have broad application prospects as novel medicament controlled release carrier materials.

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 discloses a preparation method of a modified konjac glucomannan loaded copper slow release agent and application in algal bloom control. Konjac flour is adopted as a raw material to prepare loaded copper modified konjac glucomannan; with blue algae, green algae, diatom, pyrrophyta and the like as indoor experimental algae, the result indicates that the modified konjac glucomannan loaded copper realizes an obvious inhibiting effect on the growth of different algae and has a characteristic of slow release controlling on algae growth. The loaded copper slow release agent has an obvious control effect on algal bloom of the blue algae, the green algae, the diatom and the pyrrophyta in a natural water body; field experiments prove that the loaded copper slow release agent can prevent outbreak of algal bloom within 1-3 years. By adding 0.5-1.0g / L of the loaded copper modified konjac glucomannan into the water body, the Cu<2+> is lower than the standard limit in the Standards forDrinking Water Quality and the Cu<2+> content of class-III water quality in the Environmental Quality Standards for Surface Water. The slow release algae control agent has the advantages of high efficiency and quickness of copper sulfate; the slow release ability also avoids the shortcoming of extremely high local concentration of copper sulfate caused by direct adding of copper sulfate, and is also natural and nontoxic and biodegradable, and thus is a natural, safe and efficient algae control agent with a broad application prospect.

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.