31results about How to "Special affinity" patented technology

The invention relates to a method for cultivating nucleus pearls, and belongs to the technical field of pearl cultivation. The method comprises the steps as follows: step one, taking out a pearl nucleus to be put into a first treating fluid for soaking and cultivation; step two, taking out a cell chip of the edge membrane of the rear half part of a mussel body to be put into a second treating fluid for soaking and cultivation; step three, enabling the cell chip to be adhered to the pearl nucleus and planted into the mussel for cultivation so as to form a nucleus pearl, wherein the first treating fluid comprises the components as follows: a bamboo charcoal powder solution, a dry chrysanthemum solution, a gold mudstone solution, a gobi stone solution, a safflower parasitic skin solution, a peach parasitic skin solution, a safflower loranthus parasiticus skin solution and a vitamin B solution; the second treating fluid comprises the components as follows: acid red, chondroitin, mafenide, taurine, sodium chloride, hyriopsis cumingii polysacchride, vitronectin and water. According to the method provided by the invention, the rejection of the mussel body to pearl nucleus is overcome, the vitality of the cell chip is promoted, and large-scale operation can be implemented.

The invention relates to a polypropylene mesh sheet / electrospinning nanofiber membrane and a preparation method and application thereof. The polypropylene mesh / electrospun nanofibrous membrane was prepared by the following steps: 1) preparation of chitosan‐polyethylene glycol hydrogel; 2) preparation of polylactic acid‐glycolic acid copolymer embedded with basic fibroblast factor bFGF PLGA microspheres; 3) preparation of electrospinning solution; 4) preparation of polypropylene mesh / electrospinning nanofiber membrane by electrospinning. The invention creatively combines the polypropylene mesh with the nanofiber membrane, uses the nanofiber membrane to improve the biocompatibility of the polypropylene mesh, and uses the polypropylene mesh to improve the tensile strength of the nanofiber membrane, the two complement each other, and then The introduction of microspheres to achieve controlled release of drugs can fill in many deficiencies of the existing clinical polypropylene mesh.

The invention provides a gas-phase magnesium purification method based on a pure iron filter material. The method uses a pure iron filter material to filter magnesium vapor. On the one hand, pure iron will not react with magnesium vapor and will not bring new impurities to the system; on the other hand, the impurities Al and Mn in magnesium vapor have special affinity with iron and can form a stable solid solution with iron ; At the same time, pure iron can be used as the nucleation site of some impurities in the magnesium vapor, lowering the nucleation energy barrier, allowing some impurities to deposit in advance, and removing impurities. The method provided by the invention can be applied to industrial large-scale gas-phase magnesium purification, and the production efficiency of magnesium purification can be increased by an order of magnitude by increasing the temperature, so that the content of impurity Mn in the magnesium raw material is reduced to below 10 ppm, and the content of Al is reduced to below 10 ppm. The Ca content is reduced to below 20ppm, and at the same time, non-metallic impurity elements such as F, Cl, and S can be removed to obtain magnesium with a purity of more than 99.99%.

The invention provides a gas-phase magnesium purification method based on an elemental silicon filter material. The method uses an elemental silicon filter material to filter magnesium vapor. Within a certain range of temperature and vacuum, elemental silicon does not react with magnesium vapor on the one hand, and will not bring new impurities to the system; on the other hand, Ca, Al, and Mn in elemental silicon and magnesium vapor have special properties. Affinity can form a more stable solid solution with silicon; at the same time, elemental silicon can be used as the nucleation site of impurities in magnesium vapor, lowering the nucleation energy barrier, allowing some impurities to deposit in advance, and removing impurities. The method provided by the invention can be applied to large-scale industrialized gas-phase magnesium purification, and the production efficiency of magnesium purification can be increased by an order of magnitude by increasing the temperature, so that the Mn content of impurities in the magnesium raw material can be reduced to below 4ppm, and the Al content can be reduced to below 10ppm. The Ca content drops below 10ppm, and the purity of the obtained magnesium is above 99.99%.

The present invention relates to one kind of slow released granular medicated diet for protecting gastrointestinal mucous membrane. The medicated diet is prepared with pearl, dark plum, Chinese yam, haw, malt and other seven kinds of Chinese medicinal materials in certain weight proportion. The medicated diet is used in treating gastrointestinal diseases and protecting gastrointestinal mucous membrane by means of its special affinity on gastrointestinal mucous membrane, and has the features of high effect and lasting action.

The invention discloses a composition for intestinal dialysis of pet dogs and cats and a preparation method thereof, belonging to the pet medical field. The dialysis composition comprises the following components: 10-20g of raw rhubarb, 10-20g of chitosan, 10-20g of calcium butyrate, 50-100g of modified zeolite, and 200-300ml of acetic acid with a volume fraction of 4%. During preparation, fully dissolve raw rhubarb, chitosan and calcium butyrate in acetic acid, then add modified zeolite to make a paste, make it fully infiltrated, granulate with a granulator, and dry at 60°C for 4 hours. Finished products with a particle size of 0.8‑1.2mm. The components of the intestinal dialysis composition for pet dogs and cats provided by the present invention cooperate with each other, and can absorb uremic toxins such as urea in the intestinal tract and their decomposition products such as ammonia, phosphate, creatinine, etc., and promote blood circulation. Small molecular substances such as uremic toxins such as urea are excreted into the intestinal cavity, thereby reducing the concentration in the blood, relieving hypernitremia and hyperphosphatemia caused by renal failure, and benefiting the recovery of renal failure. Economical and easy to operate.

Traditional Chinese medicine granules for treating cerebral thrombosis are prepared by the following ingredients: 40g of membranous milk vetch root, 6g of leech, 15g of sanchi, 15g of achyranthes, 30g of salvia miltiorrhiza, 15g of glechoma longituba, 15g of earthworm, 20g of European verbena and 20g of nux vomica, 1000g of water is added in the medicines for decoction till about 200g of water is remained, the medicines are prepared into the granules by fetching dregs, the dosage is once a day and one course of treatment is 7 days. The formula is used based on the conventional western medicine treatment for treating acute cerebral infarction, thereby having rapid onset of action, reliable and safe efficacy, fast recovery of patients and less sequelae.

The invention belongs to the technical field of gas-membrane separation and relates to a polyether-block-amide gel membrane with a sandwich structure and a thermal-cross-linking preparation method thereof. The polyether-block-amide gel membrane is characterized by being provided with the sandwich structure, wherein the upper surface layer and the lower surface are cross-linked layers, and a gel layer is arranged in the middle. The preparation method comprises the following process steps: (1) mixing polyether block amide, ionic liquid and a solvent uniformly at certain temperature, flatly laying the mixture on a polytetrafluoroethylene plate, and drying the solvent to prepare the gel membrane; (2) respectively coating a layer of solution containing a thermal initiator and a cross-linking agent on the upper surface layer and the lower surface layer of the gel membrane, transferring into a baking oven, controlling certain temperature and time, and carrying out surface thermal cross-linking reaction of the gel membrane; and (3) drying the cross-linked gel membrane for 24 hours in the air, then transferring into a vacuum drying box, and treating for 24 hours at the temperature of 30 DEG C to obtain the polyether-block-amide gel membrane with the sandwich structure. The polyether-block-amide gel membrane and the preparation method have the advantages that by cross linking of the upper surface layer and the lower surface layer of the membrane, the polyether-block-amide gel membrane with the sandwich structure is formed, and the loss of polyethylene glycol is not easy, so that the durability and the stability of the physical structure and the properties of the membrane are guaranteed. The polyether-block-amide gel membrane and the preparation method are applicable to separating carbon dioxide in mixed gas and recovering organic vapor.

The invention provides the application of elemental silicon filter material in gas-phase magnesium purification. In the gas-phase magnesium purification process, magnesium vapor passes through the elemental silicon filter material. In a certain range of temperature and vacuum degree, elemental silicon will not interact with magnesium vapor on the one hand. The reaction will not form a more stable substance with magnesium in thermodynamics, and will not bring new impurities to the system; on the other hand, the impurities Mn, Al, and Ca in silicon and magnesium vapor have special affinity and can form more Stable solid solution, so as to achieve removal; at the same time, elemental silicon can be used as the nucleation site of certain impurities in magnesium vapor, lowering the nucleation energy barrier, allowing certain impurities to deposit in advance, thereby achieving removal. The invention can effectively remove impurities in the magnesium vapor through the function of the elemental silicon filter material, greatly improve the purity of the magnesium, and the purity of the obtained magnesium is above 99.99%. The production system provided by the invention is suitable for large-scale industrial production, can effectively improve the efficiency of magnesium purification, and reduce the cost of magnesium purification.

The invention belongs to the technical field of gas film separation and relates to a polyether block amide gel film with a sandwich structure and a photo-crosslinking preparation method thereof. The film is characterized in that the film has the sandwich structure, the upper and lower surfaces are arranged as crosslinking layers and the middle layer is arranged as a gel layer. The preparation method comprises the following steps: (1) uniformly mixing polyether block amide, ionic liquid and solvent at a certain temperature, paving on a polyfluortetraethylene plate, and drying to remove the solvent so as to obtain the gel film; (2) coating upper and lower surfaces of the gel film with a layer of solution containing photoinitiator and cross-linking agent, transferring into an ultraviolet light curing machine for curing for 20 minutes and carrying out the surface photo-crosslinking reaction of the gel film; (3) drying the gel film after photo-crosslinking in air for 24 hours, and then transferring into a vacuum drying oven and treating for 24 hours at 30 DEG C, thereby acquiring the polyether block amide gel film with the sandwich structure. According to the preparation method provided by the invention, the upper and lower surfaces of the film are subjected to photo-crosslinking so as to form the polyether block amide gel film with the sandwich structure, so that the ionic liquid is difficult to run off, the lasting stability of the physical structure and property of the film is ensured and the film is fit for the separation of carbon dioxide in the mixed gas and the recycling of the organic steam.

The invention relates to a treating fluid used for the cultivation of nucleus pearls, and belongs to the technical field of pearl cultivation. The treating fluid comprises the following components: (a),a first treating fluid and (b), a second treating fluid, wherein the first treating fluid comprises the components as follows: a bamboo charcoal powder solution, a dry-chrysanthemum solution, a gold mudstone solution, a gobi stone solution, a safflower parasitic skin solution, a peach parasitic skin solution, a safflower loranthus parasiticus skin solution and a vitamin B solution; the second treating fluid comprises the components as follows: acid red, chondroitin, mafenide, taurine, sodium chloride, hyriopsis cumingii polysacchride, vitronectin and water. According to the invention, through using the treating fluid for cultivation, the technical problems that the peals cultivated by the traditional method are dim in luster, poor in quality and low in survival rate are solved.