94results about How to "Well sourced" patented technology

The invention provides a nano artificial dura mater with a plurality of functional layers, which comprises a structure with at least two layers; the layer facing the brain is a hydrophobic anti-adhesion electrospun layer; and the layer back to the brain is a hydrophilic nano cytoskeletal layer. The invention also provides a method for preparing the nano artificial dura mater, which comprises the following steps: preparing an electrospun solution of a hydrophobic polymer; preparing an electrospun solution of a hydrophilic polymer; preparing the prepared electrospun solution of the hydrophobic polymer into the hydrophobic anti-adhesion electrospun layer through static spinning; and preparing the hydrophilic nano cytoskeletal layer on the anti-adhesion electrospun layer from the prepared electrospun solution of the hydrophilic polymer through static spinning, receiving a membrane structure, and obtaining the nano artificial dura mater. The mechanical features of the nano artificial dura mater can meet the requirements on tensile strength and flexibility of adaptation diseases; and the nano artificial dura mater can be freely cut as required, and has wide application prospect.

The invention provides a medical anti-sticking membrane and a preparation method thereof. The anti-sticking membrane comprises a nanometer frame and hydrosol attached thereon. The hydrosol is internally packed with one or several kinds of styptic medicament or / and anti-sticking medicament. The invention also provides a preparation method of the anti-sticking membrane, comprising the following steps of: preparing electro-spinning solution, styptic medicament and / or anti-sticking medicament-containing hydrosol solution and crosslinker solution; receiving static spinning with the crosslinker solution to obtain the nanometer frame; printing the styptic medicament and / or anti-sticking medicament-containing hydrosol solution onto the nanometer frame by an ink-jet printer, and solidifying the hydrosol solution to obtain the anti-sticking membrane. The anti-sticking membrane has good capability and biological compatibility, and nontoxicity as well as nonirritant, can be completely degraded and absorbed, is compounded with controllably released styptic medicament or / and anti-sticking medicament, has controllable degrading time and speed, and conquers defects of the prior art.

The invention provides a nanometer bionic wound-surface cover and a preparation method thereof. The nanometer bionic wound-surface cover comprises a nanometer bionic bracket and hydrosol attached to the bracket, wherein the hydrosol covers one or a plurality of cytokines. The preparation method for the nanometer bionic wound-surface cover provided by the invention comprises the steps of preparingan electrostatic-spinning solution, a cytokine-containing hydrosol solution and a crosslinker solution, preparing the nanometer bionic bracket by use of electrostatic spinning, using an ink-jet printer to print the cytokine-containing hydrosol solution onto the nanometer bionic bracket, and the like, wherein electrostatic spinning and printing can be repeated so as to form the wound-surface covers different in thickness. The preparation method adopts an in-situ autologous stem-cell engineering technique and adopts stem-cell chemotactic factors to attract autologous stem cells to directionally migrate, enter a wound surface and be differentiated according to designed requirements, thereby avoiding inconvenience caused by using viable cells, achieving rehabilitation effects the same with orbetter than that of using the viable cells and having broad application prospects.

The invention discloses a nerve conduit and a preparation method thereof. The nerve conduit consists of an inner layer, an outer layer and at least one minitype cavity for storing a bioactive factor solution, wherein the inner layer is of a hydrophilic cell scaffold layer, and the outer layer is of a hydrophobic nerve conduit scaffold layer. The nerve conduit can further comprise a transition layer between the inner layer and the outer layer. The preparation method of the nerve conduit comprises the steps of preparing the inner layer by adopting an electrostatic spinning method, then adding the material for preparing the cavity, then preparing the outer layer, and taking out or dissolving the material for preparing the cavity, thus obtaining the nerve conduit. The nerve conduit has the minitype cavity, so that bioactive factors can be loaded by a manner of injection, soaking and the like as required before operation, thus not only leading the production quality to be easily controlled, but also being capable of greatly improving the survival rate of the bioactive factors, more efficiently promoting the regeneration of nerves, and enhancing the restoration effect of nerves.

The invention provides a nano artificial dura mater capable of being used as a medicine sustained-release system, having the structure which comprises at least two layers, i.e. a hydrophobic anti-blocking electro-spun layer which faces the cerebrum, and a hydrophilic nano cytoskeleton layer which backs on to the cerebrum; and cell factors and / or medicines are arranged in any layer of the artificial dura mater by way of blended spinning. The invention also provides a method for preparing the nano biomimic artificial dura mater. Compared with an artificial mater prepared by the single utilization of the electro-spinning technology, the artificial mater to which the medicines and the cell factors are added by blending technology can effectively prevent infection and faster promote the regeneration process of the artificial mater. The invention also provides a novel medicine loading and releasing mode for treating cerebral diseases, the loaded medicines can be directly and efficiently transferred into the cranial cavity along with the implantation of the dura mate and can be released according to requirements, and therefore the invention realizes favorable treatment effect and has broad application prospect.

The invention discloses a preparation method of a silicon-carbon negative electrode material for a high-compaction-density lithium ion battery. The preparation method comprises the following steps: (1) preparing nano-sized silicon powder; (2) preparing micron-sized porous natural graphite; (3) mixing the prepared nano-sized silicon powder with the porous natural graphite by ball milling; (4) adding a solution in which a carbon source precursor is dispersed into a mixture of the nano-sized silicon powder and the natural graphite for secondary ball milling; (5) coating and carbonizing integrateddevice with a graphite negative electrode material under inert gas protection for granulation and high-temperature carbonization to obtain a silicon-carbon materials with appropriate particle size; and (6) blending the prepared silicon-carbon material with commercial graphite to form a silicon-carbon negative electrode material. The preparation method not only guarantees the first coulomb efficiency and cycle performance of the silicon-carbon negative electrode material, but also significantly improves the compaction density, thereby laying a foundation for further preparation of a high-energy-density battery. In addition, the preparation process is fast and convenient; raw materials are easy to obtain; and large-scale production and application of the silicon-carbon negative electrode material are facilitated.

The invention discloses a nerve conduit and a preparation method thereof. The nerve conduit comprises an inner layer, a transition layer, an outer layer and at least one cavity used for storing a bioactive factor solution, wherein the outer surface of the inner layer is sequentially coated with the transition layer and the outer layer; the cavity is positioned between the inner surface of the outer layer and the outer surface of the transition layer and / or between the outer surface of the inner layer and the inner surface of the transition layer; the inner layer is a hydrophilic cytoskeleton layer made by adopting an electrostatic spinning method; and the outer layer is a hydrophobic nerve conduit scaffold layer made by adopting the electrostatic spinning method. The nerve conduit can be used for loading bioactive factors before an operation in a required mode, such as injection, soaking and the like due to the miniature cavity, so that the production quality of the product is easy to control, the survival rate of the bioactive factor can be greatly improved, the nerve regeneration can be promoted in high efficiency, and the nerve repairing effect can be reinforced.

The invention relates to a rare earth modified high oxygen titanium powder for 3D printing and a preparation method. The rare earth modified high oxygen titanium powder for 3D printing is a powder product prepared by adding a rare earth additive to a pure titanium matrix, wherein the addition amount of the rare earth additive is 0.05%-1.5% of the total mass of an alloy. Compared with the prior art, a certain amount of rare earth elements are added to hydrogenation dehydrogenation titanium powder or TiH2 powder, an electrode rod is made by a powder metallurgy method (cold isostatic pressure, molding pressure or hot isostatic pressure) after mixing, and then the high oxygen titanium powder is prepared by aerosol atomization. The tensile strength of the rare earth modified titanium powder is500-900 MPa after 3D printing, and the elongation is 15%-30%. The rare earth modified high oxygen titanium powder for 3D printing and the preparation method can effectively use the low cost and high oxygen hydrogenation dehydrogenation titanium powder or the TiH2 powder to obtain 3D printing materials with excellent high-plasticity, and havea good application prospect.

A lefa fertilizer dedicated for longan tree contains naphthaleneacetic acid, imidazolone, potassium dihydrogen phosphate, urea and trace elements (Zn, Cu, Mo, B, etc), and is prepared through proportionally mixing the pulverized naphthaleneacetic acid, imidazolone and potassium salt with water and filtering, proportionally mixing the pulverized molybdate, Cu salt, phosphate, urea, Zn salt, borax and complexing agent with water and filtering, proportionally mixing both filtrates, and adding water.

The invention discloses an aroma compound. By employing multiple aroma component-containing materials as raw materials, by utilizing biological target separation and aroma producing technologies such as specific enzymatic degradation, aroma microbial conversion and the like, combined with manners of modern membrane separation technology and the like, the aroma compound is extracted and obtained. The aroma efficiency of the aroma compound is raised greatly. The aroma is strong and natural. The aroma compound has good market application values.

A lefa fertilizer for litchi tree contains naphthaleneacetic acid, imidazolone, potassium dihydrogen phosphate, urea and trace elements (Zn, Cr, Mo, B, etc). and is prepared through pulverizing naphthaleneacetic acid, imidazolone and potassium salt, mixing with water, laying aside, filtering mixing copper salt, phosphate, urea, zinc salt, borax and EDTA with water, filtering, and mixing both filtrates.

The invention discloses a preparation technology of a novel nerve conduit, and belongs to the technical field of tents of biological tissue engineering. The preparation technology sequentially comprises a preparation technology of GDNF (glial-derived neurotrophic factor)-carried gelatin microspheres, a synthesizing technology of gelatin-methacrylamide hydrogel, a preparation method of polycaprolactone / gelatin electricity texture nerve conduits, and a combining method of the electricity texture nerve conduits and the GDNF-carried gelatin microspheres. The preparation technology has the advantages that a tent structure with good degradability, biological compatibility and biological safety is realized, and the GDNF is controlled and released by the GDNF-carried gelatin microspheres; compared with blank groups and collagen conduit groups, the regeneration of peripheral nerves is effectively promoted, and the structure and function of restoring damaged nerves can reach the effect similar to the effect of autotransplantation groups; the defect nerves can be bridged, and the stability of axon regeneration environment can be maintained; the invasion of peripheral connective tissues is prevented; the saturing of near and far-heart breaking ends of smaller nerve defect is solved, and the restoration of larger nerve defect is solved.

The invention discloses a method for extraction of aroma compounds from aroma materials. The method employs multiple aroma component-containing materials as raw materials, utilizes biological target separation and aroma producing technologies such as specific enzymatic degradation, aroma microbial conversion and the like, and combines with manners of modern membrane separation technology and the like to extract aroma compound products. Compared to traditional extraction technologies, the method can extract aroma compounds more efficiently and faster. The extraction separation efficiency and the aroma efficiency are raised greatly. The method has good market application values.

The industrial theanine preparing process includes the reaction between L-pyrrolidone carboxlic acid aqua and anhydrous ethylamine under certain pressure, pressure relief, dissolving in water to obtain water solution of theanine, unreacted ethylamine and other reactant; alcohol precipitation of the water solution, separation to obtain crude theanine and alcohol solution, separating alcohol solution in cationic exchange column; water elution of the exchange column to obtain eluted liquid A, concentrating liquid A and drying to obtain L-pyrrolidone carboxlic acid; ammonia water elution of exchange column to obtain eluted liquid B, concentrating liquid B and drying to obtain theanine product. The said process has the advantages of simple process, high yield, environment friendship, etc.

The invention provides a method for embedding wax tissue chip, which is characterized in that the method comprises the detailed steps of cutting small tissue blocks on the wax tissue, storing the small tissue blocks in a tissue chip storage plate and numbering the small tissue blocks; arranging the tissue chip storage plate on a burning platform till the wax composition is melted in the small tissue blocks; taking the small tissue blocks out of the tissue chip storage plate and arranging the small tissue blocks in a tissue chip embedding plate; arranging the tissue chip embedding plate in a rectangular wax mold assembled by two vertically bent copper bars; taking the wax out and arranging the wax into a wax kettle; heating and melting the wax by an electric furnace; adding the melted wax into the wax mold along one end of the wax mold till the wax mold is fully filled; removing the wax mold, separating the tissue chip embedding plate from the wax; and slicing along the direction in parallel to the even surface of the tissue chip. The method has the advantages of being low in cost, conveniently, quickly and freely collecting the chip sample, freely storing the samples in the storage plate, and having repeatable usage.

The invention provides a method for preparing a highly corrosion-resistant sintered NdFeB magnet. The method comprises the following steps: performing orientation pressing on sintered NdFeB magnetic powder in a 1.5-2.0T oriented magnetic field under the pressure of 16MPa, performing cold press molding on a pressed shape in an oil-cooled isostatic pressing machine so as to obtain a green body; performing low-temperature vacuum pre-sintering on the green body in a vacuum sintering furnace at the temperature of 850-890 DEG C for 3-3.5 hours so as to obtain a magnet; taking the magnet as a substrate, and covering a non-rare-earth compound layer on the surface of the substrate by adopting a magnetron sputtering method; performing high-temperature sintering in the vacuum sintering furnace for 2-3 hours, performing secondary tempering treatment, filling inert gases of 20-22MPa for applying pressure in the temperature treatment process, thereby obtaining the highly corrosion-resistant sintered NdFeB magnet. According to the magnetron sputtering manner, a diffusion source is attached to the surface of the magnet, grain boundary diffusion is completed in the sintering process, the base bonding force is improved, and the diffusion depth and corrosion resistance are improved.

The invention provides a comprehensive utilization method of hydrargillite-produced 4A zeolite waste residue. The method comprises the steps of: separating the ferrosilicoaluminum component in the hydrargillite-produced 4A zeolite waste residue by means of acid leaching and filtering, wherein the obtained mixed liquor of filter liquor and filter residue washing liquor is used for preparing a polymeric aluminum ferric chloride water purifying agent; and removing iron from the wet slag obtained by washing the filter residue by means of alkali fusing, roasting and activating, and synthesizing the 4A zeolite by a hydrothermal method by means of adjusting and assembling. Triethanolamine is taken as a complexing agent of the microelement iron in the liquor during synthesizing the 4A zeolite, so that the produce of an iron precipitate is overcome, and the whiteness of a 4A zeolite product is guaranteed; sodium sulfide is reacted with a triethanolamine iron complex in the zeolite-synthesized mother liquor to reduce the triethanolamine and obtain an iron sulfide precipitate; and removing the mother liquor of the iron sulfide precipitate to realize the cycle utilization. The synthesis method of the 4A zeolite adopts a sealed cycle technology, thereby being stable in operation, and free of the generation of new waste liquor and new waste slag.

The invention relates to a method for preparing sylvite from plant ash, which is characterized in that the plant ash is put into a vessel, water with the weight which is more than twice of the weight of the plant ash is added into the vessel for carrying out fully stirring for 10 minutes to 20 minutes, potassium hydroxide with the weight which is 0.2 percent to 5 percent of the total weight of the plant ash and the water is added for carrying out fully stirring for 10 minutes to 20 minutes, the PH value of the plant ash solution is adjusted to 10 to 14 for sedimentation to remove other impurities, and colorless, transparent and pure solution is obtained after fine filtration; the solution filtered is put into a reaction kettle, 2 percent to 5 percent of selected acid in which the content of the plant ash and the water is 10 percent to 50 percent of the total weight is added according to preparation requirements and the measure value of the potassium ion in the plant ash for carrying out fully stirring for 10 minutes to 20 minutes, and the PH value is adjusted to 4 to 5; heating is carried out for vaporizing the water in the solution, a centrifuge is used for dehydration till the water content is less than 5 percent, and then product obtained is crashed into 50-mesh to 200-mesh fine powder and the sylvite is obtained. The plant ash used as the raw material in the invention is economic and environment-friendly, thereby having great benefit and grand development prospect.

The invention discloses a satellite roof refined thermal design device which comprises a satellite roof, a multilayer structure, a thermal insulation gasket and screws, wherein the multilayer structure comprises a satellite interior multilayer thermal insulation assembly and a satellite exterior multilayer thermal insulation assembly; the satellite interior multilayer thermal insulation assembly is coated on the lower side of the satellite roof and arranged towards the satellite interior side; the satellite exterior multilayer thermal insulation assembly is coated on the upper side of the satellite roof and arranged towards the satellite exterior side; a load is connected onto the satellite roof by virtue of screws; the thermal insulation gasket is positioned between the load and the satellite roof. According to the satellite roof refined thermal design device disclosed by the invention, the influences of space environment and internal external heat flux on the roof can be greatly reduced, the temperature gradient and fluctuation of the roof can be reduced, and different temperature requirements of the roof on a transition section and during an in-orbit period can be met; due to athermal insulation design of the roof and the load, heat leakage of the load can be effectively reduced, and the temperature gradient and fluctuation of the roof can be reduced; the thermal design method is reasonable and feasible, full in material source, high in reliability, simple in process operation, easy to realize and low in cost.

The invention discloses an application of oral mucosa epithelia, comprising (1) preparing the graft for organ transplantation or (2) being used as seed cells to prepare mucosal grafts. The invention also discloses an application of graft which can be used for preparing the organ transplantation for repairing mucosa damage.

The invention relates to a method for preparing iron oxide red pigment by utilizing titanium white waste acid, which belongs to the technical field of pigment powder. The method comprises the following steps: firstly locally neutralizing waste acid by utilizing ammonium, adjusting the pH of the waste acid, hydrolyzing and precipitating metal impurities such as titanium, aluminum vanadium and chromium in the waste acid in a sulfate form, allowing ferrous to remain in a liquid phase, oxidizing the ferrous into ferric iron by virtue of the combined effect of the chlorine gas and hydrogen peroxide with high reduction performance, obtaining a pretreatment solution, then performing enzymolysis on an acid-containing fruit, mixing an enzymatic solution rich in organic carboxylic acid and the pretreatment solution, extracting a chelated-state ferric iron by virtue of an extracting agent, mixing microorganisms and an extraction phase, fermenting, degrading organic carboxylic acid by utilizing microorganisms, enabling the ferric iron to be exposed again, then precipitating the ferric iron by utilizing the sodium hydroxide, obtaining ferric hydroxide precipitates, and sintering at a high temperature, thus obtaining the iron oxide red pigments. According to the method, the waste acid is used as a raw material, so that the source is sufficient, the cost is low, the entire process flow is simple and easy in operation, and the application prospect is wide.

The invention relates to a sericin Chinese medicinal health-care beverage and a preparation method of the sericin Chinese medicinal health-care beverage. The beverage is prepared from sericin, Chinese wolfberry or other Chinese medicinal extract, vitamin C, lactoferrin, citric acid, aspartame, jelly powder and reverse osmosis water by homogenizing, volume fixing, canning, pasteurization and packing. The beverage is light yellow or purple red, thick in aroma, sweet and sour. The preparation method for the beverage is easy and convenient to operate and simple; and by adding the components such as Chinese medicaments and lactoferrin, the beverage has multiple health-care effects, and can be applicable to the customers at different ages and different genders and with different jobs.

The invention discloses a biological sponge based on the acellular small intestinal submucosa and a preparation method thereof. The preparation method comprises the steps of preparing the acellular porcine small intestinal submucosa, pepsin enzymatic hydrolysis, washing, lyophilization, pulverization and cross-linking. According to the preparation method, the porcine small intestinal submucosa istaken as a source; after the decellularization treatment, the immunological rejection is extremely small. At the same time, the cross-linking treatment is carried out by using a non-toxic cross-linking agent to ensure the biosafety of the obtained product. The product can be used not only for wound repair, but also as an excellent tissue engineering skin scaffold material. The product is sufficient in source, safe and reliable, cheap and easy to obtain. The composition and structure are similar to the humans. No ethical problems exist, and scale industrial preparation can be facilitated.

The invention provides medical dressing capable of promoting wound healing. The medical dressing is prepared from the following raw materials in parts by weight: 100 to 200 parts of gelatin, 50 to 100parts of sodium alginate, 80 to 160 parts of polylactic acid and 20 to 150 parts of mannose. According to the medical dressing capable of promoting the wound healing, all the raw materials are high molecular materials with good biological compatibility; the polylactic acid is added, so that the obtained medical dressing has an anti-inflammatory effect and has a good effect of promoting the woundhealing.

The invention discloses a processing technique for efficiently removing ocean oil spill. The technical solution of the invention is as follows: the processing technique for efficiently removing the ocean oil spill comprises the following steps of: (1) air-drying and screening sediments of the muddy sand beach taken from the entrance of the Dagu River to obtain particulate matters with particle size of not more than 35.5 mu m; (2) sorting to obtain the separated particulate matters with particle size of 6-10 mu m; (3) mixing the right amount of particulate matters with sea water, preparing a particle solution of 200-1000 mg / L, and filling the solution in a can to store; and (4) according to the oil spill quantity in the sea water, selecting the particle solution with proper concentration, spraying the particle solution on the surface layer of the oil spill, and stirring the solution through a propeller of a cleaning vessel until the oil spill is fully removed. The processing technique for efficiently removing the ocean oil spill has the following beneficial effects that: (1) by adopting the particulate matters made of natural sediments, the ocean oil spill is removed, toxicity and pollution are free, and interference to the original ecological system after using is less; (2) the processing technique has very high removing efficiency on the oil spill with low concentration; and (3) as the particulate matters have sufficient sources, the particulate matters need not be recycled after using, and further, the cost is low.

The present invention relates to water purifying scale remover, and is especially artificially water purifying scale remover with tourmaline as main material. The water purifying scale remover is prepared with tourmaline 60-75 wt% and Yiwangshi stone 25-40 wt%, and through crushing into nano level fineness, mixing and packing. It is added into water in the amount of 1-5 % to eliminate scale. The said minerals are sintered into pellet and set inside container for filtering water. The prepared water purifying scale remover may be used widely in industrial and civil water treatment, especially in boiler descaling.

The invention discloses a catalyst for oxidizing-synthesizing glutaric dialdehyde with cyclopentene and a preparation method thereof. The catalyst adopts a Ti-MSU type mesoporous molecular sieve as a carrier and is a supported catalyst supporting tungstic oxide on surface; the carrier Ti-MSU type mesoporous molecular sieve has a three-dimensional vertical-crossing arrangement vermiform pore canal structure, bigger aperture and higher specific surface; and the mol ratio of silicon to titanium is 1:0.01 to 1:0.04; and the content of tungstic oxide adopted as the active component accounts for 1 to 15 percent of the mass of the catalyst. The catalyst has the characteristics of high activation, better selectivity, mild reaction condition for catalyst preparation and glutaric dialdehyde synthesis with the catalyst, low cost, long service life, better industrial application prospect and environment-friendly property in the whole process from catalyst preparation to glutaric dialdehyde synthesis.

The invention discloses a melatonin composition and a preparation method thereof, and belongs to the technical field of health products. In an inventory ration of 1000 grains, the melatonin composition contains the following materials by weight: 2-3.5g of melatonin, 1.5-2.5g of vitamin B6, 80-120g of starch, 200-250g of powdered sugar, 5-9g of silicon dioxide, and 1.5-2.5g of magnesium stearate. By virtue of the composition having the effects of soothing the nerves and improving sleeping and prepared by mixing of the melatonin, the vitamin B6 and the like, disclosed by the invention, the problem of different injuries to a body due to long-time taking of sleeping pills is solved, and the composition has the advantages of improving sleeping, delaying senescence and adjusting immunity.

A process for preparing diacetylchrysophanic acid from the extract of rhubab (chrysophanic acid, chrysophanol, or aloe-emodin) includes such steps as acetylating, oxidizing, removing Cr, ammonizing, conversing, acidifying, recrystallizing and drying. Said product can be used for treating osteoarthritis.