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Energy Router for Energy Internet
InactiveUS20160241137A1Small volumeLight weightEfficient power electronics conversionLoad balancing in dc networkThree levelSoft switching
The present invention relates to an energy router for an energy internet, which comprises a three-phase three-level bi-directional rectifying unit, a six-phase interleaved DC / DC bi-directional conversion unit, a self-excitation soft start push-pull full-bridge DC / DC bi-directional conversion unit, a three-phase resonant soft switching bi-directional inversion unit, a single-phase full-bridge bi-directional inversion unit, a high-voltage DC bus and a low-voltage DC bus. The three-phase three-level bi-directional rectifying unit, the six-phase interleaved DC / DC bi-directional conversion unit, the self-excitation soft start push-pull full-bridge DC / DC bi-directional conversion unit, the three-phase resonant soft switching bi-directional inversion unit and the single-phase full-bridge bi-directional inversion unit each have three energy flow operating modes: a forward conduction, a reverse conduction and a non-conduction. According to the energy flow operating mode of each unit, different operating modes of the energy router for the energy internet are formed.
Owner:NORTHEASTERN UNIV
Preparation method of carbon nano material-modified polymer
InactiveCN107200920AGood dispersionImprove mechanical propertiesElectroconductive/antistatic filament manufactureMonocomponent polyesters artificial filamentMelt extrusionBall mill
The invention provides a preparation method of a carbon nano material-modified polymer. The preparation method comprises the following steps: 1) adding a thermoplastic polymer and a carbon nano material into a ball mill, wherein the ratio of the material to balls is 1:(2-5); ball-milling for 1-8 hours under the condition of 50-300 rpm to obtain a raw material, wherein the mass percentage of the carbon nano material is 0.05-15 percent of that of the polymer, grinding bodies in the ball mill are grinding balls with different sizes made of two kinds of same materials, and the mass ratio of the big balls to the small balls is 1:(1-6); 2) performing melt extrusion on the raw material by utilizing a single screw extruder or a double-screw extruder and curing to obtain a fibrous carbon nano material-modified polymer; or hot-pressing the raw material by utilizing a hot press to obtain the flaky carbon nano material-modified polymer. According to the preparation method provided by the invention, the dispersing properties of a carbon nano tube and grapheme in a polymer matrix layer in the melt spinning process are improved, and the physical and mechanical properties or the electrical conductivity or the thermal conductivity of a polymer composite material are effectively improved.
Owner:TIANJIN POLYTECHNIC UNIV
Simple air purifying and drying device
InactiveCN103256675AEfficient dryingEfficient killingLighting and heating apparatusSpace heating and ventilation detailsAir filtrationAir filter
The invention relates to a novel air purifying and drying device. The air purifying and drying device comprises an air filtering module, an ultraviolet sterilization module, a freeze drying and dehumidifying module and a negative oxygen ion generating module. The four modules comprise an air filtering sleeve (1), an ultraviolet lamp tube (2), an air pumping fan (3), a freeze dryer heat exchanger (4), a negative oxygen ionizer (5), a chilled water tank (6), a chilled water circulation water pump (7), an installation box (8) on the outer layer of the device and a corresponding control system. The air purifying and drying device integrates a plurality of functions such as filtering, sterilizing, drying and generating negative active ions. The air purifying and drying device has the advantages that the air purifying and drying efficiency is high, machining, installing and debugging are convenient, the air purifying and drying device is convenient to carry, easy to arrange and chemical agent-free, and the air purifying and drying can be widely used in various climatic environments.
Owner:CENT SOUTH UNIV
Preparation method of antifogging and antireflection film coating liquid
The invention discloses a preparation method of an antifogging and antireflection film coating liquid. The preparation method comprises the following steps: (1) dispersing nano silica in deionized water to prepare a dispersion liquid with mass percent concentration of 0.1-30%, adding a silane coupling agent to the dispersion liquid, heating to raise the temperature, and reacting for 0.2-1 hour; (2) adding a mixed solution which is formed by acrylic acids and acrylic esters and is diluted by a diluent to the solution in the step (1), stirring and mixing the solutions at 50-80 DEG C for 30-40 minutes, then adding an initiator, reacting for 5-10 hours, and cooling to obtain a nanocomposite dispersion liquid; (3) diluting the nanocomposite dispersion liquid in the step (2) into a solution with concentration of 0.1-50wt%. The preparation method has the beneficial effects that an in-situ free radical polymerization method is adopted, the coating effects are better, the coating can be ensured to have good apparent properties, and the coating is high in drying speed and has excellent antireflection and anti-dazzle effects.
Owner:HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS +1
Method for preparing high-yield SiC nanowire
The invention discloses a method for preparing a high-yield SiC nanowire. The method comprises the followings steps of: performing mechanical mixing by taking 36.8 to 95.2 mass percent of industrial silicon powder or silicon dioxide powder and 4.8 to 63.2 mass percent of industrial expandable graphite as raw materials; filling a mixture into a graphite crucible and placing the graphite crucible into a high-temperature atmosphere furnace; filling argon as a protective gas after vacuumizing; raising a temperature to be between 1,300 and 1,700 DEG C at a speed of 2 to 15 DEG C / min; keeping the temperature for 1 to 8 hours; keeping the pressure intensity in the furnace lower than 1.0 MPa in an overall preparation process; naturally cooling to room temperature; and opening the furnace to obtain the SiC nanowire. The method has the characteristics of low-cost and easily-obtained raw materials, simple process without using a catalyst and productivity up to 65 percent, and is suitable for industrial production of the SiC nanowire.
Owner:ZHEJIANG SCI-TECH UNIV
Ternary rare earth complex and application of complex in preparing high-strength hybrid luminous hydrogel
ActiveCN106432297AHigh transparencyHigh mechanical strengthGroup 3/13 organic compounds without C-metal linkagesLuminescent compositionsEnvironmental resistanceStructural formula
The invention provides a ternary rare earth complex and application of the complex in preparing high-strength hybrid luminous hydrogel. The chemical structural formula of the ternary rare earth complex is shown as follows. First terpyridyl bridged imidazolium salt is used for being combined with a rare earth beta-diketone complex to form a ternary complex, the ternary complex can be self-assembled in water to form a micellar structure, and then rare earth ions and ASPA are isolated through the collaborative protection on the rare earth ions by the ternary complex and the micellar structure, so that the aim of preparing a hydrogel which is good in luminescence property and high in mechanical strength is achieved. The hydrogel uses water as a medium, the preparation method is simple, easy and environmentally friendly, and a volatile organic solvent is avoided from being used. Please see the formula in the description.
Owner:HEBEI UNIV OF TECH
Extractant and preparation method and application thereof
ActiveCN110042234ALarge precipitate sizeNo useProcess efficiency improvementPregnant leach solutionWastewater
The invention provides an extractant and a preparation method and application thereof. A phenoxy dicarboxylic acid extractant is synthesized by reacting a diphenol compound and halogenated alkyl carboxylic ester in a solvent and then acidifying; and the saponification extractant is used for beneficiating trace rare earth in an MgSO4 leaching solution of ionic adsorption type rare earth mineral. Compared with an existing extractant, the saponification extractant has higher precipitation capacity, better rare earth selectivity, and high precipitation efficiency; as the rare earth precipitates are large in size, a rare earth extraction complex can be separated from a water phase more conveniently, and the production efficiency is improved; and moreover, no volatile diluent is used in the beneficiation process, the COD value of raffinate meets the national wastewater discharge standard in China, and the raffinate and the carboxylic acid extractant can be recycled.
Owner:XIAMEN INST OF RARE EARTH MATERIALS
Modified metal wire drawing powder and preparation method thereof
The invention relates to the technical field of wire drawing, and particularly discloses modified metal wire drawing powder. The modified metal wire drawing powder is prepared from the following components in parts by mass: 10 to 60 parts of lubricant, 10 to 60 parts of friction-reduction additive, 1 to 15 parts of extreme pressure agent, 0.3 to 10 parts of anti-rust agent and 5 to 25 parts of alkaline metal / alkaline earth metal hydroxide, wherein the extreme pressure agent comprises methylphenyl silicone oil. A preparation method of the modified metal wire drawing powder comprises the following steps of mixing and stirring the lubricant, the friction-reduction additive and the anti-rust agent, heating, adding a saturated water solution of the alkaline metal / alkaline earth metal hydroxide, preserving heat and reacting for a period of time, adding the extreme pressure agent, uniformly stirring, drying, and crushing, so as to obtain the modified metal wire drawing powder. The modified metal wire drawing powder has the advantages that the lubricating property and anti-corrosive property are good, the high temperature and high pressure-resistant property is realized, the cost is low, the abrasion consumption is low, and the storage is easy.
Owner:河北纳泰化工有限公司 +1
Preparation method of lyophilization sulbactam sodium material medicine
InactiveCN101914104ANo useNo pollution in the processOrganic chemistryForeign matterSodium bicarbonate
The invention belongs to the field of medicine and chemical industry. The invention relates to a preparation method of a lyophilization sulbactam sodium material medicine, which comprises the following steps of: (1) adding sodium bicarbonate into sulbactam acid suspension to obtain a lyophilization sulbactam sodium material liquid medicine; (2) filtering the liquid medicine by utilizing a filter; (3) uniformly pouring the sterile liquid medicine into a material disk of a freeze drier, setting the temperature of a baffle plate to be -40 DEG C to -10 DEG C for freezing for 1-6h, then setting the temperature of the baffle plate to be -10 DEG C to 10 DEG for keeping for 1-10h, then setting the temperature of the baffle plate to be 10 DEG C to 20 DEG C for drying 1-20h, then setting the temperature of the baffle plate to be 20-50 DEG C for drying for 1-30h, finally setting the temperature of the baffle plate to be 50-65 DEG C for drying 1-20h; and (4) grinding and uniformly mixing the lyophilization powder prepared from the step (3) to obtain the lyophilization sulbactam sodium material medicine. The products prepared by the preparation method of a lyophilization sulbactam sodium material medicine has the advantages of good clarity index and high content; and bad factors of solvent residues, clarity foreign matters, turbidity and the like prepared by utilizing a solvent method can be avoided.
Owner:SHIJAZHUANG ZHONGSHUO PHARMA CO LTD +1
Intervention type in-vivo real-time tumor imaging method and system
ActiveCN107233076AAvoid stainsOvercome the disadvantages of health hazardsDiagnostics using lightCatheterHuman bodyX-ray
Provided is an intervention type in-vivo real-time tumor imaging method and system. The imaging method comprises the steps that the polarization directions of terahertz and infrared source emergent light waves are adjusted, the light waves are conducted to the tissue to be detected through an array optical-fiber bundle, signals reflected by the tissue are converted into vertically polarized waves and then enter a detector for imaging in an incidence mode. The imaging system comprises a terahertz and infrared source, a terahertz detector, a reshaping unit, a polarization unit, a polarization conversion unit and an intervention unit. The system works in a terahertz and infrared frequency band, can perform tumor diagnosis in the human body in real time, has more advantages compared with X-ray, CT examination and other technologies, is high in spatial resolution, and has more advantages than a pathological biopsy technology in rapid, accurate and noninvasive characteristics. The intervention type in-vivo real-time tumor imaging method is safer, more accurate, quicker and more convenient and has the good application prospect in tumor diagnosis.
Owner:NORTHWEST INST OF NUCLEAR TECH
Preparation method of star-shaped polyurethane elastomer toughened polylactic acid compound
ActiveCN107189386AEfficient and controllable synthesisGood mechanical propertiesPolyurethane elastomerSolvent
The invention provides a simple polylactic acid toughening modification method, in particular to a method for preparing a toughened polylactic acid compound by taking star-shaped polyurethane as a toughening modifier. The toughened polylactic acid compound with a better toughening effect is prepared by adding polyisocyanate as a crosslinking agent. The preparation method of the star-shaped polyurethane toughened polylactic acid compound comprises the following steps: adding 60 to 99 parts of polylactic acid, 1 to 40 parts of star-shaped polyurethane and 0 to 10 parts of polyisocyanate into a torque rheometer for compounding and banburying; performing a co-blending reaction at the temperature of 170 to 210 DEG C and at the rotation speed of 30 to 120 revolutions per minute for 3 to 20 minutes. The star-shaped polyurethane is prepared by adopting a simple bulk one-step method or a bulk pre-polymerizing method. The preparation method is easy to operate, is short in preparation period, is high in efficiency, and has the advantages of lowering equipment investment and production cost and overcoming the defects caused by adoption of solvents in the prior art, along with no need of catalyst, environment-friendly production process, and easiness in popularization and application.
Owner:TAIYUAN INST OF TECH
Preparation method of dielectric material for high energy storage capacitor
The invention discloses a preparation method of a dielectric material for a high energy storage capacitor, the invention relates to the technical field of dielectric materials, the preparation methoduses polyaniline coated with inorganic nanoparticles as a filler, polyvinylidene fluoride as polymer matrix, metal Ni as the load. Firstly, the surface of inorganic nanoparticles is modified by physical ball milling and chemical surfactant, a supercritical fluid reaction is adopted to coat polyaniline on the surface of the inorganic nanoparticles, so that a composite fill is prepared, the composite fill and the polyvinylidene fluoride are spun into a fibrous membrane by melt electrospinning, at last, the metal Ni load and the polyvinylidene fluoride are composited on the fiber membrane by magnetron sputter, the load of the metal Ni not only helps to fill the high porosity of the electrospun fiber film, but also helps to maintain high breakdown field strength, high energy storage density, high dielectric constant and low dielectric loss of the dielectric material, and the composite dielectric material has high energy storage performance.
Owner:滨州高新高端装备制造产业园有限公司
Preparation and application of boric acid functionalized resin
ActiveCN111875650AHigh yield and puritySimple and efficient operationSugar derivativesSolid sorbent liquid separationOleuropeinMeta-aminophenylboronic acid
The invention provides preparation of a boric acid functionalized resin and an application of the boric acid functionalized resin to separation and purification of high-purity oleuropein, so as to overcome the defects of high usage amount of a target solvent, complex process, low purity of the oleuropein and low yield in the prior art. A m-aminophenylboronic acid resin is simple in preparation process, simple and convenient to operate and free from corrosive chemical reagents; a process route for purifying the oleuropein is simple, the purity can reach 60% or above, the yield can reach 60% orabove, the cost is low, the efficiency is high, and the method is suitable for large-scale industrial production. The m-aminophenylboronic acid functionalized resin can be regenerated and repeatedly used, and the adsorption capacity is reduced by about 5% after the m-aminophenylboronic acid functionalized resin is recycled for five times.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Flame-retardant, antibacterial and transparent super-amphiphobic paint and preparation method and application thereof
ActiveCN110283529ARich in practical application valueRich application valueFireproof paintsAntifouling/underwater paintsIonSolvent
The invention discloses flame-retardant, antibacterial and transparent super-amphiphobic paint and a preparation method and application thereof. The flame-retardant, antibacterial and transparent super-amphiphobic paint is prepared by the following steps: firstly preparing inorganic / organic nanoparticles modified by a nitrogen-containing positive ion silane coupling agent, and dispersing the inorganic / organic nanoparticles along with flame retardant particles and a fluorine-containing silane coupling agent in a solvent and reacting. By a spray-coating, brush-coating or dip-coating method, the paint is applied on the surface of a metallic base material, an inorganic base material or an organic polymer base material. The use amount of the coating obtained is less. It can be effectively ensured that characteristics such as color, texture, pores, air permeability, etc. of the surface of the base material are unchanged, and excellent and stable super-amphiphobic property, flame retardant property and antibacterial property can be obtained. Meanwhile, the preparation is simple, the raw materials are cheap and easily available, and no toxic organic solvent is used. The preparation condition is mild, and the preparation is carried out at normal temperature and in an ordinary state and is environmentally-friendly. The preparation cost is low. Thus, the method is suitable for large-scale production and is good for industrial application and promotion.
Owner:SICHUAN UNIV
Preparation method of anagrelide hydrochloride
InactiveCN103254197AThe synthesis process is simpleShort synthetic routeOrganic chemistryBenzyl chlorideImpurity
The invention relates to a preparation method of anagrelide hydrochloride, and relates to preparation methods of chemical raw materials. The preparation method provided by the invention mainly solves the technical problems that an existing synthetic line of anagrelide hydrochloride is long, a toxic reagent, namely cuprous cyanide is used in the synthetic line, many impurities exist in the product, the product is hard to purify and the cost and unit consumption are high. The preparation method comprises the following steps: 1, preparing 2, 3-dichlorbenzyl alcohol; 2, preparing 2, 3-dichloro-6-nitrobenzyl alcohol; 3, preparing 2, 3-dichloro-6-nitryl-benzyl chloride; 4, preparing N-(2, 3-dichloro-6-nitrobenzyl) glycine ethyl ester hydrochloride; 5, preparing N-(6-amino-2, 3-dichlorobenzyl) glycine ethyl ester; 6, preparing an anagrelide hydrochloride crude product; and 7, preparing anagrelide hydrochloride. The preparation method provided by the invention is simple in synthetic process, shorter in synthetic line, low in cost and unit consumption, high in yield and less in three wastes generated in the reaction process, and is suitable for industrialized production. The preparation method provided by the invention is applied to the field of preparation of chemical raw materials.
Owner:HEILONGJIANG UNIV
Method for improving polyamide reverse osmosis membrane performance through surface modification
ActiveCN105771695AImprove throughputReduce application operating costsReverse osmosisMembrane surfacePolyamide
The invention relates to a method for improving polyamide reverse osmosis membrane performance through surface modification. The method comprises the specific steps that a lignin solution is prepared at first; then, the prepared lignin solution is filtered through a polyamide reverse osmosis membrane on the conditions of the certain pressure, flow speed and temperature; finally, the lignin solution in a device is discharged, and pure water is used for flushing the membrane device on the conditions of zero pressure and high flow speed to obtain the modified reverse osmosis membrane. According to the modified reverse osmosis membrane obtained through the method, the membrane surface roughness is improved, the load electric property is enhanced, the membrane osmosis performance is remarkably improved, the membrane anti-pollution capacity is improved, and the operation cost of the reverse osmosis membrane can be lowered.
Owner:NANJING UNIV OF TECH
Rosa roxburghii tratt powder rich in vitamin C and preparation method thereof
ActiveCN111700247AReduce the degradation of VCGood clarityNervous disorderMetabolism disorderSaccharomyces cerevisiaeMolecular biology
The invention discloses rosa roxburghii tratt powder rich in vitamin C and a preparation method thereof. The preparation method comprises the following steps: (1) pre-treating rosa roxburghii tratt toobtain rosa roxburghii tratt juice or concentrated juice; (2) fermenting the rosa roxburghii tratt juice by using saccharomyces cerevisiae; (3) sequentially filtering by using filter cloth and a nanofilter element ceramic membrane; (4) performing vacuum concentration treatment; and (5) drying. According to the preparation method disclosed by the invention, the saccharomyces cerevisiae is added in the preparation process of the rosa roxburghii tratt powder, and carbohydrates in the feed liquid are effectively reduced through the fermentation effect of the saccharomyces cerevisiae, so that theproportion of the vitamin C in the material is increased, and the content of the vitamin C in the rosa roxburghii tratt powder disclosed by the invention reaches 17% or above. According to the preparation method disclosed by the invention, SOD is effectively enriched, and the content can reach 10-15,000U / g; the yeast and other impurities are filtered by the ceramic membrane, high-temperature treatment is avoided, and degradation of VC is reduced; and the rosa roxburghii tratt powder prepared by the preparation method disclosed by the invention is good in fluidity, effectively inhibits the caking problem, and can be applied to industrial production.
Owner:广东青云山药业有限公司
DA reaction-based fluorine-containing polyacrylate self-repairing coating and preparation method thereof
The invention discloses a preparation method of a DA reaction-based fluorine-containing polyacrylate self-repairing coating. The method comprises the following steps: preparing a mixed monomer and aninitiator aqueous solution; separately weighing polyacrylic acid-b-hexafluorobutyl polyacrylate, deionized water, and an alkali according to the mass of the mixed monomer, adding polyacrylic acid-b-hexafluorobutyl polyacrylate, deionized water, and the alkali into a reactor together with 25-30% of the mixed monomer, introducing argon and performing heating, and adding the initiator aqueous solution to prepare a seed emulsion; dropwise adding the remaining initiator aqueous solution and mixed monomer into the seed emulsion, and carrying out a reaction to obtain a furyl-containing fluorine-containing polyacrylate soap-free emulsion; and dissolving a maleimide-based crosslinking agent in an organic solvent and then performing uniform mixing with the furyl-containing emulsion, and coating thesurface of a substrate with the mixed solution for curing to form the self-repairing coating. The preparation method of the self-repairing coating is mild, and does not use a large amount of solvents.The self-repairing coating has good water and oil repellency and good self-repairing performance, and at the same time, the applicable substrate of the coating is wide.
Owner:SHAANXI UNIV OF SCI & TECH
Ozone decolorization method for waste leftover cloth
The invention provides a decolouration method with ozone for waste piece cloth, which comprises: putting the cloth into water, adjusting its pH value to 5~9 with 10~ 30% caustic soda solutions and 0.1~1.0mol / L sulfosol; reacting for 40~90min to decoloring. The advantages of this invention include: discharging no three wastes, special without chlorine or other bleacher; realizing operation automation to decrease labor strength; and high decoloring rate more than 99%.
Owner:UNIV OF SCI & TECH BEIJING
Water purifier with dehumidifier
InactiveCN105271554AImprove cleanlinessRealize comprehensive utilizationMultistage water/sewage treatmentDrinking water installationWater storageWater vapor
The invention discloses a water purifier with a dehumidifier. The water purifier comprises the dehumidifier and a water purifier body. A liquid accumulator is communicated with a compressor through a compressor muffler, the compressor is electrically connected with a dehumidifier controller, an evaporator fan is electrically connected with the dehumidifier controller, and a frosting preventing temperature sensor is electrically connected with the dehumidifier controller. An evaporator water pan is communicated with a water storage tank through a PE pipe, a self-priming pump is electrically connected with a water purifier controller through a wire, and a UDF filter is communicated with the self-priming pump and a second PP cotton filter through PE pipes. The water purifier is reasonable in design, the air conditioning refrigeration technology is used for the water purifying technology, the water purifier is a technical breakthrough in the field of water purifying, air refrigeration is achieved, vapor in air is extracted, resources are saved, waste water generated in the water producing and flushing process of the water purifier directly returns into the water storage box, and waste-water-free utilization is achieved.
Owner:CHUZHOU FLURIDA MACHINERY ELECTRONICS
Magnetic biochar adsorbent prepared from sorghum straws as well as preparation method and application thereof
PendingCN113617333ARealize high-value resource utilizationWide variety of sourcesOther chemical processesWater contaminantsSorbentEngineering
The invention provides a magnetic biochar adsorbent prepared from sorghum straws as well as a preparation method and application of the magnetic biochar adsorbent. The sorghum straws are used as a raw material, and the sorghum straw-based magnetic biochar adsorbent is finally obtained through the steps of sorghum straw pyrolysis, magnetic loading, mechanical grinding and the like. The prepared adsorbent is applied to treatment of ciprofloxacin-containing sewage, an adsorption experiment is completed within a certain time, and adsorption removal of ciprofloxacin and cyclic utilization of the adsorbent are completed under the action of an external magnetic field. The method has the advantages of rich raw material sources, good adsorbent effect, high cyclic utilization efficiency, easy separation of an adsorption material and a polluted water body and the like, synchronously realizes resource utilization of agricultural wastes and rapid treatment of sewage, and has a certain potential in resource utilization of organic solid wastes and sewage treatment.
Owner:MOUTAI INST
Preparation method of polymer based dielectric material
InactiveCN108748942AImprove surface activityImprove dispersionFlat articlesPolyvinylidene fluorideSurface-active agents
The invention discloses a preparation method of a polymer based dielectric material and relates to the technical field of dielectric materials. The preparation method comprises the steps that ceramicparticles loaded with Ag serve as filler, polyvinylidene fluoride serves as a polymer base, the ceramic particles are subjected to surface modification through a method combining physical ball millingand chemical surface active agents, then the modified ceramic particles are prepared into composite filter by being loaded with metal Ag through an ultrasound-assisted magnetron sputtering method, and finally the polyvinylidene fluoride and the composite filler are subjected to multi-layer co-extrusion alternately. The prepared polymer based dielectric material has high breakdown field strength,high energy density, high dielectric constant and low dielectric loss, and the preparation method is low in energy consumption, environmentally friendly and free of pollution.
Owner:WUHU COUNTY YILUN ELECTRONICS
Method for extracting lycium barbarum polysaccharide
The invention discloses a method for extracting lycium barbarum polysaccharide. The method for extracting the lycium barbarum polysaccharide comprises the following steps: A, weighing a certain weightof lycium barbarum, performing vacuum freeze drying, crushing and passing through a sieve of 60 to 80 meshes; B, taking the sieved dried lycium barbarum powder, adding 700 to 900 ml of water into per100 g of lycium barbarum according to the material liquid ratio, and stirring uniformly; C, adding cellulase and papain, putting into ultrasonic extraction equipment and extracting enzymolysis liquid; D, filtering the enzymolysis liquid to obtain filtrate, adding absolute ethanol into the filtrate according to the ratio of 1:4, precipitating and standing at 4 DEG C for 24 hours, centrifuging for15 minutes at the centrifugal rotating speed of 5000 rpm, collecting the precipitate, performing freeze drying, crushing and passing through a 80-mesh sieve to obtain soluble polysaccharide. Enzymolysis is assisted by high-frequency ultrasonic treatment, so that the obtaining time of the lycium barbarum polysaccharide is greatly shortened, the polysaccharide extraction rate is relatively high on the premise of guaranteeing the purity of the lycium barbarum polysaccharide, treatment equipment is simple, a toxic organic solvent is not used, and industrialization is facilitated.
Owner:邱媛媛
Desulfurization gypsum powder decorating board
The invention discloses a desulfurization gypsum powder decorating board. A raw material formula of the desulfurization gypsum powder door pocket board is as follows: 60-70 percent of desulfurization gypsum powder, 8-12 percent of epoxy resins, 4.8-5.2 percent of polyvinyl chloride, 4.8-5.2 percent of foam regulating agents, 4.8-5.2 percent of activated charcoal (AC) foaming agents, 2.8-3.2 percent of stearic acid, 3.8-4.2 percent of calcium stearate and 4.8-5.2 percent of glazes. A preparation method of the desulfurization gypsum powder decorating board comprises the following steps of: (1) weighing the materials in the proportion of the raw material formula; (2) mixing and stirring the weighed materials; (3) performing extrusion molding on a mixed material by virtue of an extruding machine; (4) heating and conserving molded blank bodies; (5) manufacturing semi-finished products which are subjected to the conservation to be blank bodies by using a board pressing machine; (6) delivering the pressed blank bodies to a drying kiln for drying; (7) performing atomization and glaze spraying on the dried desulfurization gypsum powder decorating board by using the conventional method; and (8) drying the desulfurization gypsum powder decorating board onto which the glazes are sprayed. The desulfurization gypsum powder decorating board has the advantages of corrosion resistance, weather resistance and the like.
Owner:朔州市润臻新技术开发有限公司
Kit for detecting ubiquitin-binding enzyme antibody and use method thereof
PendingCN113138272AHigh sensitivityImprove featuresDisease diagnosisBiological testingAntiendomysial antibodiesPolyethylene glycol
The invention discloses a kit for detecting a ubiquitin-binding enzyme antibody and a use method, and belongs to the field of biomedicine. The kit for detecting the ubiquitin-binding enzyme antibody comprises: a solution for detecting the ubiquitin-binding enzyme antibody; and the solution comprises an active ester for labeling a ubiquitin-binding enzyme antibody and a non-radioactive solution. The active ester comprises thioruthenium derivative active ester and biotin polyethylene glycol active ester. The kit further comprises a 96-well plate, a streptavidin graphene plate, a 0.01 mol / L PB, a 5% BSA solution and a PBST solution. The streptavidin graphene flat plate is an MSD96 pore plate marked by streptomycin. Compared with the prior art, the kit provided by the invention has the advantages of higher sensitivity and specificity, no use of radioactive substances, simplicity and convenience in operation, capability of detecting the amount of antibodies in trace serum, and very good clinical application value.
Owner:SIR RUN RUN HOSPITAL NANJING MEDICAL UNIV
Method for synthesizing high-selectivity oxaziridine through chemical enzyme process
ActiveCN107739741AHas a catalytic effectNo useFermentationEnvironmental resistanceChemical synthesis
The invention discloses a method for synthesizing high-selectivity oxaziridine through a chemical enzyme process and belongs to the technical field of chemical synthesis. According to the method, aromatic aldehyde and fatty amine are used as reaction substrates, acetonitrile is used as a solvent and D-ethyl mandelate is used as a peroxy-acid precursor. The method comprises the following operationsteps: adding enzyme, an oxidizing agent, the reaction substrates, the peroxy-acid precursor and the solvent into a reaction container, stirring and reacting for 2 hours under the room-temperature condition to obtain the high-selectivity oxaziridine. The experiment proves that lipase has an obvious catalyzing effect of the reaction and can reach high cis-trans selectivity which is greater than 90%or more; no by-product is generated in the reaction process. Compared with the conventional chemical synthesis method, the method has the advantages of metal-free catalysis, green and environmental protection, low cost, high efficiency and high selectivity; a new method is provided for synthesizing oxaziridine compounds with cis-trans selectivity.
Owner:JILIN UNIV
A kind of flame retardant antibacterial transparent superamphiphobic coating and its preparation method and application
ActiveCN110283529BRich in practical application valueImprove flame retardant performanceFireproof paintsAntifouling/underwater paintsOrganosolvMetallic materials
Owner:SICHUAN UNIV
Method for detecting cotton content of fabric
InactiveCN108195999ANon-destructiveNo excessive technical requirementsChemical analysis using titrationComputer scienceStandard samples
The invention discloses a method for detecting cotton content of fabric. The method comprises steps of selecting standard samples; selecting a titration solution; identifying the cotton content of thefabric according to standard sample titration rates obtained by titration on the standard samples of clothing. The method adopts nondestructive testing, damage to the clothing and generation of polluting gas are avoided in the identifying process, while samples are damaged and the environment is polluted in the common burning method. High-cost instruments and tools are not needed in the method, and the detection method is simple and has important significance in identification of the cotton content of the fabric.
Owner:CHINA THREE GORGES UNIV
Production method of coal ash stair handrail
InactiveCN102659346ACorrosion resistantWeather resistantSolid waste managementStairway-like structuresEpoxyMixed materials
The invention discloses a production method of a coal ash stair handrail. The raw materials include, by ratio, 70% of coal ash, 8% of polyvinyl choride, 12% of epoxy resin, 3% of stearic acid, 4% of calcium stearate and 3% of paint. The production method includes weighing all the materials according to the ratio of the raw materials, fully mixing and stirring the materials (except the paint), transferring the mixed material to a blank mould for extrusion forming, subjecting the formed semi-finished product to heating and maintenance, sending the blank after maintenance to a drying box for drying, and subjecting the dried blank to paint backing. The stair handrail produced through the method has the advantages of being light in weight, corrosion and weather resistant, attractive and elegant in appearance, not easy to deform and the like.
Owner:朔州市润臻新技术开发有限公司
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