143 results about "Citrinin hydrate" patented technology

The invention relates to preserving liquid for sperm, in particular to the preserving liquid for swine sperm, and belongs to the technical field of animal reproduction. The preserving liquid for the swine sperm comprises the following components: 25.5 to 35.0g / l of anhydrous dextrose, 5.1 to 7.0 g / l of trisodium citrate, 1 to 10 g / l of sodium bicarbonate, 2 to 4g / l of EDTA, 1 to 3g / l of potassium chloride, 2.4 to 3.4g / l of citric acid, 8.5 to 9.5g / l of trihydroxymethylaminomethane, 0.26 to 1g / l of amikacin and 0.2 to 1g / l of vitamin C. Through detection, in the swine sperm preserved by the preserving liquid, the sperm viability reaches 0.60 to 0.85 and the integrity rate of sperm acrosome reaches 90 percent, which excess the requirement of the current artificial fertilization.

The invention relates to a human hard tissue filling and repair material containing calcium citrate. The invention provides the human hard tissue filling and repair material containing calcium citrate, wherein the calcium citrate is selected from tricalcium citrate, which can be one or any combination of tricalcium citrate tetrahydrate (the molecular formula is Ca3(C6H5O7)2.4H2O), tricalcium citrate dihydrate (the molecular formula is Ca3(C6H5O7)2.2H2O) and tricalcium citrate anhydrous (the molecular formula is Ca3(C6H5O7)2), and the weight percentage content of which in the human hard tissue filling and repair material is 50 to 100 percent. The invention also provides the preparation method of the human hard tissue filling and repair material containing calcium citrate. The human hard tissue filling and repair material containing calcium citrate which is provided by the invention is a reliable hard tissue filling and repair material which is degradable in the body, and the invention has significant treatment effects to bone defects, osteoporosis and bone tumors.

The invention discloses a synthesis method and application method of manganese Prussian blue material for a lithium ion battery, and belongs to the preparation and application method of the manganesePrussian blue material. The synthesis method comprises the following steps: selecting a manganese source from anhydrous manganese chloride (MnCl2) or manganese chloride monohydrate (MnCl2.H2O); selecting an iron source and cyanogen from potassium ferricyanide (K3[Fe(CN)6]); selecting a chelating agent from anhydrous sodium citrate or sodium citrate dihydrate; weighing the manganese source and theclelating agent in mass ratio of x: 1, and dissolving into a mixed solution with the methyl alcohol and deionized water in any proportion to prepare a solution A; dissolving the potassium ferricyanideinto the deionized water to prepare the solution B with the concentration of 0.04mol / L; pouring the solution B into the solution A, uniformly mixing to acquire the solution C, standing for 6-24h at the room temperature, and separating, purifying and drying to obtain a target product. The synthesis method disclosed by the invention has the advantages that the raw material is easy to obtain, the synthesis method is simple, the operation step is high in controllability, the obtained product is high in purity, and uniform in particle size; and the structure is a hollow cube and easy to prepare ina large-scale manner. The manganese Prussian blue material disclosed by the invention is served as the lithium ion battery negative material, and is excellent in electrochemical performance.

The invention belongs to the technical field of rice planting fertilizers, in particular to a rice selenium-enriching and cadmium-reducing foliar fertilizer. The foliar fertilizer comprises citric acid monohydrate, small fruit saponin, sodium selenite, urea, potassium chloride, potassium dihydrogen phosphate, soluble trace element compounds, soybean peptides and tartrate. The foliar fertilizer greatly improves the absorption and transformation rate of rice for selenium, and further has a good cadmium inhibiting property, and is rich in nutrients, easily absorbed by the rice, high in selenium enriching and cadmium reducing efficiency and stable in effect after being sprayed to the rice, so that the rice is high in yield.

The invention provides a preparation method of a sawtooth-like nickel-cobalt-iron PBA (prussian blue analogue) sintered oxide nanomaterial, and belongs to the technical field of materials. The preparation method comprises the following steps: a cubic-structured nanometer nickel-cobalt-iron PBA precursor is synthesized from nickel nitrate hexahydrate, trisodium citrate trihydrate, potassium ferricyanide and potassium hexacyanocobaltate(III); an ammonia water solution is used for corrosion, centrifugal separation is performed, a sample is washed and dried, a sawtooth-like nickel-cobalt-iron PBAnanomaterial is obtained and sintered, and a 'Z'-Ox nanomaterial is obtained. The 'Z'-Ox nanomaterial can effectively catalyze peroxymonosulfate to generate hydroxyl radicals and sulfate radicals, andaccordingly, bisphenol A is degraded. The position of corrosion is determined by uneven distribution of metal coordination bonds in the precursor, anisotropic corrosion is formed, and a new way is opened up for fine adjustment of the structure and properties of an MOF material; the method has the characteristics of being simple to operate, short in preparation period, high in economic benefit andsuitable for large-scale production.

Belonging to the technical field of boar semen dilution, the invention relates to a boar antiviral long-acting semen diluent formula and a preparation method. The boar semen diluent comprises: alpha-D-glucopyranose powder, fructose, trisodium citrate dihydrate, ethylenediamine tetraacetic acid disodium, sodium bicarbonate, polyvinyl alcohol, trishydroxymethylaminomethane, inositol, vitamin C, arginine, a radix isatidis injection, a 5% ceftiofur sodium injection, and a 5% Ribavirin injection. The preparation method includes: dissolving all the components in distilled water, mixing the components evenly, and conducting sterilization to obtain the boar semen diluents. The formula involves rich nutrients, antibacterial Chinese and western medicine components and antibacterial components, thus ensuring normal sperm metabolism. After certain period of time at the lower limit of storage temperature, the effects of nutrition and sperm shock prevention can be realized, and the invasion of external bacterial viruses in an artificial insemination process can be avoided.

The invention discloses a Pd@PtNi nano-crystal with an octahedral core-shell structure, and a preparation method thereof for the first time. The preparation method of the crystal comprises the following steps: adding an octahedral Pd nanocrystal and hydrazine hydrate to an aqueous solution of PVP and citric acid monohydrate, injecting the obtained solution to a K2PtCl4 and NiCl2.6H2O mixed aqueous solution, heating, and stirring to obtain the Pd@PtNi nano-crystal with an octahedral core-shell structure. The invention also discloses a Pd@PtNi / C metal nano-catalyst, and a preparation method and a use thereof. The preparation method of the Pd@PtNi / C metal nano-catalyst comprises the following steps: injecting carbon black into the Pd@PtNi nanocrystal, carrying out ultrasonic treatment, washing, and drying to obtain the nano-catalyst. The nano-catalyst can be used in the fuel cell cathode oxygen reduction reaction process. The preparation method of the Pd@PtNi nanocrystal has mild and fast reaction, and the obtained Pd@PtNi nanocrystal has the advantages of uniform dimension, good dispersibility, enhancement of the utilization rate of Pt atoms, and enhancement of the catalytic activity on the fuel cell cathode oxygen reduction reaction.

The invention discloses a preparation method of a nano 1T phase molybdenum disulfide / nickel disulfide composite nano material, belonging to the field of preparation of inorganic material transition metal chalcogenide. The preparation method adopts a two-step method, and comprises the following steps of: firstly, synthesizing a molybdate- radical- intercalated nano nickel hydroxide nanosheets froma plurality of substances of nickel nitrate, nickel chloride, ammonium molybdate hydrate, sodium molybdate, hexamethylene tetramine, trisodium citrate dihydrate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate as raw materials; and then carrying out hydrothermal synthesis by taking the nanosheets as templates and taking one or more of thiourea, thioacetamide or L-cysteine as sulfur sources to obtain a high-purity nano 1T-phase molybdenum disulfide / nickel disulfide composite nano material. The preparation method has simple process, mild conditions, high production efficiency and safe preparation process. By adjusting the dosage of the sulfur sources, the proportion of 1T phase molybdenum disulfide can be adjusted to obtain high purity 1T phase molybdenum disulfide.

The invention discloses an industrial production method of citric acid tofacitinib. The method comprises the following steps: (1) adding a compound SMA and a compound SMB to a mixed solvent 1 which comprises DMSO and purified water, and catalyzing through DIPEA to react to obtain an intermediate INA; (2) carrying out a homogeneous reaction of the INA under an alkaline condition to obtain a rough intermediate INB; (3) refining the rough INB through low-level alcohol and water to obtain fine INB; (4) treating the fine INB by debenzylation and acidification to obtain an intermediate INC (salt form); (5) carrying out a reaction between the INC and SMC to obtain an intermediate IND which is tofacitinib free alkali; (6) preparing salt through the IND and citric acid monohydrate in purified waterto obtain citric acid tofacitinib. According to the method, the defects of preparation technologies in existing literatures can be solved; the used solvents are three types of solvents, so that the environmental pollution is low; the time consumption is small; the operation processes are simple; industrial production can be carried out. The formula is shown in the description.

The invention discloses a preparation method for nano MnO of a negative electrode material of a lithium ion battery, which belongs to the technical field of lithium ion battery material and electrochemistry. The method comprises the following steps of: firstly dissolving polyvinylpyrrolidone K30 in glycol under the condition of magnetic stirring, wherein the concentration of the polyvinylpyrrolidone K30 is 2.0 to 4.0 g / L; then adding citric acid monohydrate with the concentration of 8.4 to 42.0 g / L; adding manganese acetate tetrahydrate when the adding citric acid monohydrate is dissolved completely, wherein the molar ratio of the citric acid monohydrate to the manganese acetate tetrahydrate is between 0.3 and 1.6; and then subjecting the mixture to magnetic stirring, heating the mixture between 140 DEG C and 180 DEG C to evaporate the solvent; transferring the red-brown sticky material obtained into an over of 140 to 180 DEG C to dry for 3 to 5 hours; and finally subjecting the product dried to thermal treatment of 600 to 1000 DEG C for 1 hour in H2 / Ar mixed atmosphere to obtain nano MnO of a negative electrode material of a lithium ion battery. The preparation method for nano MnO of a negative electrode material of a lithium ion battery provided by the invention has the advantages that the specific capacity of the nano MnO negative electrode material prepared by means of themethod provided by the invention is high, the cycle performance is stable, the security performance is good, the preparation method is simple and easy, the production conditions are mild, and the preparation method is suitable for large-scale production.

The present invention relates to a diesel engine exhaust SCR denitration catalyst and a preparation method thereof, a cerium molybdenum complex oxide is used as a catalytically active component, praseodymium, tungsten or lanthanum is used as a cocatalyst blend, and alumina is used as a carrier. The cerium molybdenum complex oxide, a co-catalysis ion precursor complex solution, pseudo-boehmite, pure gamma alumina, citric acid monohydrate and other organic additives are uniformly stirred, mixed, decayed, extruded and molded, then dried in the shade, dried, and roasted to obtain an integrated catalyst. The catalyst is environment-friendly, high in NOx removal efficiency, and wide in range of active temperature, NOx removal efficiency at 250 DEG C-425 DEG C is more than 95%, the highest denitration activity is up to 100%; and the diesel engine exhaust SCR denitration catalyst has excellent sulfur resistance, water poisoning resistance, high mechanical strength, good ammonia storage performance, high CO and HC catalytic oxidation activity and low catalyst cost, and is cost-effective, and especially suitable for diesel engine exhaust NOx removal.

The invention relates to the field of lithium ion batteries, and discloses a silicon negative electrode material and a negative electrode sheet coated with carbon nanotubes, a preparation method thereof and a lithium ion battery. The preparation method of the silicon negative electrode material comprises the following steps: (1) dissolving polyethylene glycol, citric acid and / or citric acid monohydrate and transition metal salt in a solvent to obtain a precursor solution; (2) mixing the precursor solution with the silicon material, filtering, washing, and then drying under the condition of isolating air to obtain the precursor-coated silicon material; (3) heating the precursor-coated silicon material in an air atmosphere to 200-280 DEG C for sintering for 1.5-3.5 hour, naturally cooling toobtain MOx / Si composite pow; (4) heating the MOx / Si composite powder under the protection of inert gas and / or weak reducing gas to 400-800 DEG C for sintering for 1-5h. The silicon negative electrodematerial obtained by the method has stable electrochemical performance, can avoid damage to the structure of carbon nanotubes, has simple process, does not use flammable and explosive alkane as carbon source, and has high safety.

The invention discloses a displacement type electroless gold plating solution, which comprises monopotassium citrate monohydrate bis(malononitrile alloy (I)), a conductive compound, a buffering agent, a shielding complexing agent, a nickel oxidation remover and water. The nickel oxidation remover is one or more of diethylenetriamine, pentamethyldiethylenetriamine, triethylenetetramine, hexamethyltriethylenetetramine and tetraethylenepentamine. The present invention provides the source of gold ions with potassium citrate monohydrate (malononitrile alloy (I)) as the displacement type chemical gold plating solution, thus does not need to use potassium gold cyanide as the gold source compound, and is an environmentally friendly displacement chemical Gold plating solution. Since the substrate metal is easily corroded in the electroless plating solution of the displacement type to produce more nickel oxides, the nickel oxide remover is used to remove the nickel oxides on the surface of the substrate metal. Experimental results show that the uniformity of the plating film formed by using the displacement type chemical gold plating solution provided by the invention is good, the grain boundary has no corrosion condition, and the solder wettability is good.

The invention provides a high-load platinum and nickel ordered intermetallic compound. The high-load platinum and nickel ordered intermetallic compound takes three-dimensional porous carbon gel as a carrier, and is prepared by a method comprising the following steps: evenly mixing graphene oxide-containing carbon carrier precursor dispersion liquid, a metal precursor solution containing a Pt precursor and an Ni precursor, a reducing agent and sodium citrate dehydrate; then, carrying out a hydrothermal reaction to generate high-load platinum and nickel disordered alloy evenly loaded in carbon gel; after that, carrying out heat treatment under the reducing atmosphere to form the high-load platinum and nickel ordered intermetallic compound evenly loaded in the carbon gel. Compared with the traditional high-load Pt / C catalyst, the catalyst provided by the invention relatively reduces the consumption of precious metal Pt; the activity of the catalyst is improved by using an intermetallic synergistic effect, the stability of the catalyst is improved by using high dispersion of ordered metal nanoparticles, and the high dispersion characteristic of the catalyst is still maintained after ordered heat treatment is carried out on the catalyst. The invention also discloses the preparation method of the high-load platinum and nickel ordered intermetallic compound. The invention also discloses use of the high-load platinum and nickel ordered intermetallic compound.

The invention discloses a copper-cobalt-silicon catalyst used in preparation of lower alcohol from synthetic gas and a preparation method thereof, relating to a catalyst. The catalyst is shown as CuiCoj-SiO2, wherein i and j refer to atomic mole numbers of Cu and Co respectively; i is more than or equal to o and less than or equal to 3; j is more than or equal to o and less than or equal to 3; and the catalyst consists of the following components in percentage by mass: 0-20 percent of Cu, 5-25 percent of Co and the balance of SiO2. The preparation method comprises the following steps of: adding Cu(NO3)2.3H2O and Co(NO3)2.6H2O into an absolute ethyl alcohol solution into which citric acid monohydrate is dissolved; adding a certain amount of deionized water; dripwise adding tetraethyl orthosilicate; evaporating in a water bath into gel; drying and baking to obtain a catalyst precursor; and raising the temperature in normal-pressure 5 percent H2 / Ar gas current and reducing to obtain a product. The copper-cobalt-silicon catalyst has high catalytic activity and low lower alcohol space time yield; and in particular, the space time yield of a C2<+> alcohol is increased greatly.

The invention discloses a selenium enrichment and cadmium reduction rice planting method, and belongs to the technical field of planting. The planting method includes the steps: field selection; rice seedling culture; site preparation and fertilization; transplantation; field management; rice harvesting and storage. Field management includes spraying selenium-containing leaf fertilizers to leaf surfaces, wherein the selenium-containing leaf fertilizers comprise sodium selenite, citric acid monohydrate, urea, potassium chloride and monopotassium phosphate. Particularly, the selenium-containing leaf fertilizers are sprayed to the leaf surfaces once or twice within specified time before rice breaks, selenium enrichment and cadmium reduction effects can be simultaneously achieved, and the method has the advantages of simplicity in implementation and remarkable effects.

The invention discloses a preparation method for a polyvinylidene fluoride (PVDF) porous film. The method comprises the following steps: adding PVDF powder into dimethyl formamide (DMF), stirring for 30-60min to form a PVDF / DMF solution in the concentration of 4%-6%, and then adding citric acid monohydrate grains into the PVDF / DMF solution and stirring for 30-60min, thereby acquiring a transparent macromolecule precursor solution; dropping the macromolecule precursor solution onto a treated glass plate, completely spreading out the solution according to a tape casting method, and then drying the glass plate at 40-70 DEG C, and curing and forming a PVDF film containing CAM on the glass plate after 20-60min; putting the cured and formed glass plate into a NaHCO3 solution and soaking for 20-40min; and taking out the film floating on the water level, washing the residual NaHCO3 solution on the film with ethyl alcohol and deionized water in turn, and then drying the film at 40-60 DEG C, thereby acquiring the PVDF porous film. The PVDF film prepared according to the preparation method provided by the invention has better mechanical strength and flexibility as well as super-oleophylic / oily super-hydrophobic property.

The invention discloses a micro-nano structure zinc oxide-carbon composite pellet and a preparation method thereof. The micro-nano structure zinc oxide-carbon composite pellet is obtained by hybridization compounding of zinc oxide and carbon to obtain a solid pellet having the diameter of 6-12 micrometers, wherein vertical nanosheets having the length of 700-900 nanometers, the height of 700-900 nanometers and the thickness of 15 to 25 nanometers are formed on surfaces of the solid pellet and are connected with each other into a nest; a mole ratio of zinc oxide to carbon is (60-70%): (30-40%); zinc oxide has a hexagonal structure; and carbon comprises amorphous carbon and graphitized carbon and a weight ratio of the amorphous carbon to the graphitized carbon is (85-95%): (5-15%). The preparation method comprises the following steps of dissolving zinc acetate dihydrate, urea, sodium citrate dihydrate and glucose in water to obtain a mixed solution, carrying out hydrothermal treatment on the mixed solution to obtain a reaction solution, orderly carrying out solid-liquid separation, washing and drying to obtain an intermediate product, putting the intermediate product in an inert gas atmosphere, and carrying out annealing to obtain the micro-nano structure zinc oxide-carbon composite pellet. The micro-nano structure zinc oxide-carbon composite pellet can be widely used for fields of catalysis, adsorption and photoelectricity.

The invention relates to a food fresh-keeping method, and discloses a tilapia fresh-keeping method, comprising a tilapia preservative, wherein the tilapia preservative is made of hydration sodium carbonate, sodium carbonate, sodium bicarbonate, hydration sodium citrate, sodium chloride, etc., and processed tilapia fillets are preserved under 0-4 DEG C after uniformly immersed for 10-15min in the tilapia preservative. The raw materials for preparing the tilapia preservative is in a foodstuff grade, is safe and innocuous, and accords with foodstuff security proposed by state at present. A shelf life of fresh tilapia flesh by using the preservative can reach 10-15 days, and sense, physical and chemical and microbe indexes of the tilapia flesh reach tilapia fillet requirement, and satisfies demands on fish flesh quality for consumers in our country. The tilapia flesh can obtain a long shelf life, it makes convenient for prolonging a circulation and shelf life of the fish flesh, and the raw materials have low cost.

The invention discloses a method for preparing composite grain size nano silver paste. The method comprises the steps that 1, silver nitrate is reduced with trisodium citrate dehydrate and ferrous sulfate, centrifugal separation is carried out, nano silver particles are dispersed in ultrapure water, trisodium citrate dehydrate is added for flocculation, centrifugal separation is carried out again, the steps of dispersing, flocculation and centrifugal separation are repeated more than three times, and nano silver particles of a first size are obtained; 2, silver nitrate is reduced with trisodium citrate dehydrate, wherein a trisodium citrate dehydrate solution is adopted for flocculation, and centrifugal separation is carried out to obtain nano silver particles of a second size; 3, the nano silver particles of the first size and the nano silver particles of the second size are mixed according to the mass ratio of 2:1 to 5:1 and dispersed in ultrapure water, the trisodium citrate dehydrate solution is added for flocculation, and centrifugal separation is carried out to obtain the composite grain size nano silver paste. The heat conductivity of the provided composite grain size nano silver paste is greatly improved, and the situation that the size of an interconnection joint of nano silver paste obtained under the low-temperature sintering interconnection conditions is unstable in the high-temperature service process is relieved.

The invention belongs to the technical field of a paddy planting fertilizer and specifically relates to a selenium-rich cadmium-reducing leaf fertilizer special for paddy. The selenium-rich cadmium-reducing leaf fertilizer special for paddy is composed of citric acid monohydrate, sodium selenite, urea, potassium chloride, monopotassium phosphate, soluble microelement compound, momordica grosvenori and herb of alligator alternanthera. The leaf fertilizer can increase the absorbing conversion rate of the paddy for selenium, has an excellent cadmium-impeding performance, is rich in nutrition and is easily absorbed. After the fertilizer is applied to the paddy, the selenium-rich cadmium-reducing efficiency of the leaf fertilizer is higher, the effect is stable and the yield of the paddy is high.

Belonging to the technical field of building materials, the invention specifically relates to a method for synthesis of tetracalcium aluminoferrite by a sol-gel technology. The raw materials used by the synthesis method include: calcium nitrate tetrahydrate, aluminum nitrate nonahydrate, iron nitrate nonahydrate, citric acid monohydrate, ethylene glycol and water. The specific synthesis steps consist of: dissolving three inorganic salts of certain stoichiometric ratio in deionized water and mixing them uniformly, adding citric acid to prepare a light yellow metal-citric acid chelate solution, then adding ethylene glycol to undergo an esterification reaction, subjecting the obtained sol to aging under complete stirring at 80DEG C so as to obtain sticky wet gel, then further drying it for 24h at 150DEG C to obtain dry gel, and grinding and calcining the dry gel so as to obtain a tetracalcium aluminoferrite monomineral. The tetracalcium aluminoferrite powder prepared by the sol-gel technology has the characteristics of high purity, superfineness, and easy sintering, etc.

The invention discloses a magnetic nano functional material for extracting uranium from seawater, and a preparation method thereof. The preparation method includes the following steps: step 1, reacting ferric chloride hexahydrate with trisodium citrate dihydrate to obtain Fe3O4 particles; step 2, preparing Fe3O4@SiO2 particles through a compound reaction; step 3, dispersing Fe3O4@SiO2 in a mixed solution of ethanol and ammonium hydroxide, adding titanium isopropoxide, and obtaining Fe3O4@SiO2@TiO2 particles after reaction; step 4, dispersing Fe3O4@SiO2@TiO2 in an NaOH solution, and performingcalcination after reaction to obtain Fe3O4@s-TiO2 particles with developed surfaces; step 5, dispersing Fe3O4@s-TiO2 in acetic acid, adding a crosslinking agent, and carrying out an oil bath reactionto obtain cyanated Fe3O4@s-TiO2-CN particles; step 6, dispersing Fe3O4@s-TiO2-CN in a mixed solution of methanol and water, adding hydroxylamine hydrochloride, adjusting the pH of the solution to 7, and carrying out an oil bath reaction to obtain amidoximated Fe3O4@s-TiO2-AO particles. The Fe3O4@s-TiO2-AO material prepared by the preparation method has a developed surface, good magnetic properties, high stability, durability and bio-resistance and excellent adsorption selectivity for the uranium, and can be used for eliminating the uranium in uranium-containing water bodies and extracting theuranium from the seawater.

The present invention relates to heteroatom doping porous carbon materials and a preparation method thereof. The preparation method comprises the following steps of: 1) uniformly grinding of citrate dihydrate and urea or thiourea, performing uniform mixing in proportion, putting mixture into a container, rising a temperature to a certain temperature in a tube furnace under the protection of inertgas, performing heat preservation, performing natural cooling to a room temperature, and obtaining powder; 2) uniformly grinding of the powder obtained in the step 1), immersing the powder into deionized water for stirring or ultrasonic processing, performing vacuum filtration or centrifugation, and cleaning the powder by employing the deionized water and absolute ethyl alcohol after vacuum filtration or centrifugation until the filter liquor is close to neutral filter liquor; and 3) performing drying, cooling and uniform grinding of the powder obtained in the step 2), and obtaining the heteroatom doping porous carbon materials. The comby porous carbon materials have good power density, energy density, rate capability and cycle performance, the capacity has almost no attenuation after circulation for 2000 cycles so as to provide a design idea for preparation of the new generation energy storage device electrode materials.

The invention relates to a magnetic resonance contrast agent using a human endogenous protein as a chelating agent and preparation thereof. The contrast agent comprises the chelating agent and paramagnetic metal ions coordinated with the chelating agent, the chelating agent is the human endogenous protein, and the human endogenous protein includes aspartic acid and glutamic acid; during the preparation, firstly the human endogenous protein is added to water, the human endogenous protein is dissolved by stirring, and then trisodium citrate dihydrate is added and stirred evenly to obtain a mixedsolution; paramagnetic metal salt is added and stirred to coordinate the paramagnetic metal ions with the chelating agent so as to obtain a reaction solution, finally the pH of the reaction solutionis adjusted to 5.0-7.4, and then the reaction solution is separated and dried. Compared with the prior art, the contrast agent is formed by the direct chelation of the human endogenous protein and theparamagnetic metal ions, and traditional micro-molecule chelating agents are not needed; the contrast agent has simple synthesis process, mild reaction conditions and good environmental compatibility, reduces energy consumption, and is easy in mass production.

The invention relates to a method of preparing a uniform carbon wrapped LiFePO4 nano composite material by using saccharomycete. The method comprises steps of with saccharomycete as a template agent and a carbon source, weighing raw materials according to proportion, dissolving FeCl2.4H2O in deionized water, then adding cultured saccharomycete cells, stirring with magnetic force, then adding NH4H2PO4, LiOH.H2O and a proper amount of citric acid monohydrate in sequence, stirring obtained solution in a water bath pot so as to form sol, and drying the sol to obtain gel. The obtained gel is grinded and then is inserted in inert atmosphere so as to prepare the carbon wrapped LiFePO4 nano material.

The invention discloses a method for quickly preparing a rapid-charging graphene-based positive electrode material. The method includes the steps of preparing a lithium iron phosphate precursor solution with specific concentration from iron nitrate nonahydrate as an iron source, lithium dihydrogen phosphate as a phosphorus source and a lithium source and citric acid monohydrate as a carbon source,adding a proper quantity of graphene oxide solution with ultrasonic operation and stirring sufficiently to ensure that graphene is dispersed in the solution evenly, adding the prepared solution intoa liquid storage tank, and subjecting the prepared solution to spray pyrolysis in the reduced atmosphere so as to obtain a black powder product. The method has the advantages that compared with traditional solid-phase mixing, the graphene is mixed with raw materials in the solution state, and even dispersion and coating of the graphene on an active material can be achieved to guarantee stability and uniformity of the black powder product; the black powder product is synthesized by one-step spray pyrolysis, and accordingly the method is simple and reliable in production technology, uniform in product stability, low in energy consumption, environment friendly and suitable for large-scale industrial production.

The invention relates to a preparation method of flaky Cu9Fe9S16 nanoflowers. The preparation method includes dispersing a ferric salt and a manganese salt into a solvent with stirring, adding trisodium citrate dihydrate with stirring, adding sodium acetate with mixing uniformly, performing solvothermal reaction for 6-8 hours at 180-240 DEG C prior to centrifuging and washing so as to obtain Fe2MnO4 nanocrystalline; dispersing the Fe2MnO4 nanocrystalline into water, adding a (NH4)2S solution, conducting ultrasonic dispersion and centrifugal washing, and dispersing a product into water so as to obtain dispersion liquid; adding a copper salt solution into the dispersion liquid, and conducting ultrasonic dispersion and centrifugal washing so as to obtain the flaky Cu9Fe9S16 nanoflowers. The preparation method has the advantages of simplicity, safety, environment friendliness, low cost and easiness in operation. The flaky Cu9Fe9S16 nanoflowers are capable of effectively converting near-infrared light into heat and have a nuclear magnetic imaging effect, thereby being quite promising in application prospect for photothermal therapy and diagnosis of cancers.

The invention discloses a preparing method of antimony sulphate nanometer-micrometer line and array, which comprises the following steps: weighing potassium antimony tartrate, dihydrate citric acid trisodium, thiomalic acid at 10:11:1-60 molecular proportion; stirring these raw materials in the secondary distilled water sequently; loading the composition in the polytetrafluoroethylene liner of stainless steel high-pressure autoclave to seal; reacting at 140-240 deg.c for 3-24 h to obtain the product. The beam-shaped antimony sulphate nanometer-micrometer line and array can grow on the surface of substrate with ITO glass, tungsten filament or SiN micrometer fiber in the polytetrafluoroethylene liner simultaneously, which possesses excellent single-crystal structure.

The invention provides a cold-water instant pig seminal fluid dilution powder formula, a manufacturing process and an application method, and is characterized in that each dosage of the formula comprises the following components: 36.0-40.0 g of glucose, 0.8-2.0 g of sodium bicarbonate, 6.0-8.0 g of trisodium citrate dihydrate, 1.0-3.0 g of potassium chloride, 1.0-3.0 g of citric acid monohydrate, 1.0-3.0 g of disodium ethylenediamine tetraacetic acid, 0.2-1.0 g of penicillin of 800,000 units, and 1.0-3.0 g of Tris (tris(hydroxymethyl)metyl aminomethane). The formula has easily-available materials, simple preparation, easy transport and storage, convenient usage, low cost, and long preservation time for seminal fluid; during application, only a certain amount of secondary distilled water is added, and dissolution is realized with cold water; the formula is suitable for dilution of pig seminal fluid which is preserved at a constant temperature of 17 DEG C, can reduce seminal fluid production cost and increase economic benefits.