106 results about "Dextrose solution" patented technology

The invention belongs to the technical field of microbial fermentation, and particularly discloses a method for producing gamma-aminobutyric acid by using lactobacillus hilgardii and an application of the gamma-aminobutyric acid. The method comprises the following steps: (1) activating strains; (2) culturing a seed solution; (3) fermentation culture: inoculating the third-stage seed solution into a fermentation tank filled with a fermentation culture medium, and carrying out two-stage fermentation culture to obtain a fermentation solution; in addition, a glucose solution or a sodium glutamate solution is fed in the whole fermentation process, and an agaric water extraction solution and a bifidobacterium longum fermentation solution are fed in the first-stage fermentation and the second-stage fermentation respectively; and (4) inactivating and filtering. According to the method disclosed by the invention, a two-stage fermentation control strategy is adopted in the main fermentation process, and meanwhile, specific supplemented materials are fed in a fed-batch manner, so that the growth of thalli can be effectively promoted, the metabolic state of the thalli is optimized, and more metabolic flux is guided to synthesis of GABA, thereby effectively improving the yield of GABA.

Hexavalent chromium (Cr (VI)) is widely applied to the industries of electroplating, spinning, leather tanning and chromium product manufacturing, and Cr (VI)-containing sewage has very strong biotoxicity and mutagenicity. Therefore, effective removal of Cr (VI) in industrial wastewater has important significance for protecting ecological environment and human health. As a novel bismuth-based oxychloride photocatalyst, the Bi4NbO8Cl material with the Aurivillius-Sillen structure has the advantages that the unique layered molecular structure of the Bi4NbO8Cl material is beneficial to the separation of photon-generated carriers, and the Bi4NbO8Cl material has good photocatalytic performance. On the basis of a Bi4NbO8Cl visible light response photocatalyst, the concentration of a glucose solution is regulated and controlled, carbon shell layers with different thicknesses are loaded, meanwhile, oxygen vacancy defects with different concentrations are formed, the visible light response Bi4NbO8Cl (at) C composite photocatalyst is obtained, and a good effect is achieved when the visible light response Bi4NbO8Cl (at) C composite photocatalyst is used for treating Cr (VI)-containing wastewater under the acidic condition.

The invention relates to a preparation method and application of carbon nanosphere modified biomass monolithic composite porous carbon, and belongs to the field of energy and chemical industry, and the preparation method comprises the following steps: S1, cutting pine into pine chips, drying, and carbonizing at high temperature to obtain a carbonized product; s2, dipping the carbonized product in a hydrochloric acid solution, then washing the carbonized product to be neutral, dehydrating the carbonized product, and polishing the dehydrated carbonized product; s3, putting the composite porous carbon into a glucose solution, carrying out vacuum-assisted impregnation, transferring into a hydrothermal reaction kettle, carrying out hydrothermal carbonization, drying, and carrying out constant-temperature chemical conversion; and S4, placing the composite porous carbon in a potassium bicarbonate solution for vacuum impregnation, drying and dehydrating, placing in a tubular furnace for constant-temperature chemical conversion to obtain a converted and carbonized product, impregnating in hydrochloric acid, washing, and drying. The specific surface area of the integral composite porous carbon is effectively increased, the electrode / electrolyte interface contact characteristic is remarkably optimized, and the pore channel space utilization rate and the energy storage performance are synchronously improved.

The invention relates to a method for preparing bio-based isosorbide dimethyl ether through resin catalysis, and belongs to the technical field of organic synthesis. Adding corn starch into a sulfuric acid solution, hydrolyzing into glucose, and filtering to obtain a glucose solution; adding a solid acid catalyst into the concentrated glucose solution, and filtering after reaction; carrying out reduced pressure distillation on the filtrate to obtain an isosorbide crude product, and purifying through recrystallization; the preparation method comprises the following steps: adding isosorbide, a methylation reagent and a basic catalyst into a reaction kettle, stirring for reaction, cooling and filtering; and distilling the filtrate, and collecting fractions to obtain high-purity isosorbide dimethyl ether. The solid acid catalyst is sorbic acid based styryl macroporous cation exchange resin; the styryl macroporous cation exchange resin is soaked in sulfuric acid to be activated and then is mixed with sorbic acid chloride, 2-thiophenecarbonyl chloride and zinc chloride to react, and then washing and drying are performed to prepare the solid acid catalyst; the isosorbide dimethyl ether prepared by the method disclosed by the invention is high in purity and relatively high in yield.

The invention relates to the technical field of iodide content detection, in particular to a method for determining radiochemical purity and iodine content of sodium iodide capsules for diagnosis by HPLC (High Performance Liquid Chromatography), which comprises the following steps: setting chromatographic conditions, and connecting a radioactive flow detector and an ultraviolet detector in series; preparing a disodium hydrogen phosphate solution, a glucose solution, a vitamin C solution, a first control solution, a potassium iodate solution, a second control solution, a carrier solution, a first sample solution, a second sample solution, a negative control solution and a test solution; and determining the radiochemical purity and iodide content of the first sample solution and the second sample solution in three batches based on the chromatographic conditions and the determination standard. According to the method, test parameters such as capsule sample analysis time, a pretreatment mode and a sample size are optimized, the radiochemical purity of the capsule is accurately determined, and the iodide content is controlled, so that the problem that main components cannot be accurately quantified and potential radioactive impurities cannot be detected by a traditional diagnosis sodium iodide [131I] capsule determination method is solved.

The invention relates to the technical field of boron carbide production, in particular to a continuous production method and device for high-purity superfine boron carbide, and the production method comprises the following steps: S1, preparing materials; boric acid, glucose and PVA are prepared and dissolved in water to prepare a boric acid solution, a glucose solution and a PVA solution for standby application; step S2, pulping; adding a glucose solution into the boric acid solution in the stirring process, and stirring and mixing for 3-4 hours to obtain a mixed solution; adding a PVA solution into the mixed solution, stirring and mixing, and injecting into a graphite mold; s3, performing dehydration, carbonization and carbon thermal reduction reaction to generate boron carbide; and S4, boron carbide purification. Compared with the prior art, a complex can be formed between boric acid and glucose to realize molecular-level contact of boron and carbon, the reaction activity is high, the reaction temperature is effectively reduced, the particle size of boron carbide is reduced, other materials are not used for doping, only carbon and boron exist in reactants, and the purity of boron carbide is high.

The application belongs to the technical field of microbial fermentation, and specifically discloses a method for producing gamma-aminobutyric acid by using Lactobacillus hilgardii and application of the method. The method comprises the following steps: (1) activating the strain; (2) seed liquid culture; (3) fermentation culture: inoculating the tertiary seed liquid into a fermentation tank containing a fermentation medium, and performing two-stage fermentation culture to obtain a fermentation liquid; and in the whole fermentation process, glucose solution or sodium glutamate solution is continuously added, and in the first-stage fermentation and the second-stage fermentation, black fungus water extraction solution and long bifidobacterium fermentation solution are continuously added, respectively; and (4) inactivation and filtration. The method can effectively promote the growth of the bacteria and optimize the metabolic state of the bacteria by adopting a two-stage fermentation control strategy and continuously adding specific feed in the main fermentation process, so that the metabolic flow is more directed to the synthesis of GABA, thereby effectively improving the yield of GABA.

This invention discloses a carbon-coated Fe-Co-Ni-B magnetic micron alloy particle, its preparation method, and its application. The method includes the following steps: dissolving iron acetylacetonate, cobalt acetylacetonate, and nickel acetylacetonate in anhydrous ethanol, then adding cyclopentylboric acid and dissolving it to obtain a mixed solution; subjecting the mixed solution to a solvothermal reaction; and after post-treatment to obtain boron-doped pre-decomposition precursor powder. A glucose aqueous solution is then added dropwise to the pre-decomposition precursor powder under stirring and mixed uniformly to ensure uniform adsorption and coating of the glucose solution on the powder surface. The powder is then dried to obtain a glucose-coated composite precursor. The composite precursor is subjected to programmed temperature heat treatment under an inert or weakly reducing atmosphere to obtain carbon-coated Fe-Co-Ni-B magnetic micron alloy particles with a core-shell structure. This invention successfully prepares a magnetic composite material possessing high saturation magnetic properties, good chemical stability, and controllable magnetic properties.

The invention discloses a non-invasive real-time blood glucose monitoring system based on a microwave biosensor, which comprises the following steps of: according to a non-invasive blood glucose monitoring method, carrying out structural design on the microwave sensor, and optimizing structural parameters of the sensor by utilizing simulation software to obtain structural parameters with excellent performance. A six-degree-of-freedom mechanical arm is designed for a test tube used by a measuring system according to parameters such as the size of a sensor to realize a clamping function; building a measuring system based on the designed sensor and the mechanical arm; performing optimization design on visual positioning, path planning and high-precision sensing of the measurement system; manufacturing the microwave sensor by using a photosensitive blue oil technology, and preparing solutions with different concentrations required for monitoring; measuring the glucose solutions with different concentrations by the built measurement system to obtain an S21 parameter obtained by measurement; through data summarization, the resonant frequency data obtained by the measurement system is fitted to obtain the change relationship between the S21 resonant frequency and the concentration of the glucose solution.

The present invention relates to glucose solutions for parenteral administration comprising glucose and a pharmaceutically acceptable form of iron, as well as to containers comprising, in separate chambers, said glucose solutions and a lipid emulsion for parenteral administration and / or an amino acid solution for parenteral administration.

The invention relates to a graphdiyne-coated sulfur-doped modified carbon negative electrode material as well as a preparation method and application thereof. The preparation method of the carbon negative electrode material comprises the following steps: carrying out hydrothermal treatment on a glucose solution to obtain black powder, mixing the black powder with sulfur powder, and heating and carbonizing in an inert atmosphere to obtain a C-S material; dispersing the obtained C-S material in a solvent, and carrying out heating reaction to obtain a reaction solution; then adding an HEB graphdiyne monomer solution into the reaction solution to obtain a reaction mixture; and under a dark condition, carrying out heating reaction on the obtained reaction mixture in an inert atmosphere to obtain the carbon negative electrode material. The sulfur-doped and graphdiyne-coated synergistically modified carbon negative electrode material provided by the invention is stable in structure and excellent in electrochemical performance. The graphdiyne coating layer can inhibit volume expansion in the charging and discharging process, enhance the structural stability, provide additional lithium storage sites and realize long-life cycle under the fast charging condition.

The utility model provides a glucose solution filling assembly for testing an electrochemical biosensor and a detection device, and relates to the technical field of biosensor detection, the glucose solution filling assembly comprises a liquid storage tank, a confluence piece, a constant-temperature water bath kettle and a sensor assembling assembly, the confluence piece is provided with a liquid inlet end and a liquid outlet end, the liquid inlet end is communicated with the accommodating cavities in a time-sharing manner and is higher than the liquid outlet end, the constant-temperature water bath pot receives a glucose solution discharged from the liquid outlet end, and the sensor assembling component fixes the electrochemical biosensor; in a non-filling state, the sensor assembling component and the confluence piece are close to and far away from the constant-temperature water bath kettle respectively, and in a filling state, the sensor assembling component and the confluence piece exchange position states respectively. By optimizing the pipeline connecting structure, the problems that an existing pipeline is complex in arrangement and large in occupied space are solved, and in the filling state and the non-filling state, the problem that glucose solution filling flexibility is poor is solved through movement matching of the confluence piece and the sensor assembling assembly.

The present application belongs to the technical field of biological fermentation and discloses a process for the production of L-histidine by biological fermentation. It comprises the following steps: inoculating a seed solution of Escherichia coli into a fermenter containing a fermentation medium at a culture temperature of 35-37°C, maintaining the reducing sugar content at 46 g / L by adding a glucose solution containing adenosine monophosphate in fed-batch increments, stopping the addition of the glucose solution 4 hours before the end of fermentation, maintaining the pH in the fermenter at 6.9-7.1 by adding ammonia solution in fed-batch increments, and adding an antifoaming agent to control foaming, with the fermentation time being 40-50 hours, thereby obtaining an L-histidine fermentation solution.The process according to the present application exhibits high fermentation efficiency and low production costs and is suitable for industrial production.

This invention belongs to the field of agricultural biotechnology, specifically relating to the application of a compound biological agent in agriculture. The compound biological agent comprises live engineered Bacillus subtilis bacteria and a 3% glucose solution; wherein the engineered Bacillus subtilis bacteria are obtained through genetic modification using Bacillus subtilis as the substrate bacteria, and the live bacteria concentration is ≥1×10¹. 0 The 3% glucose solution (CFU / mL) is a 3% (w / v) aqueous solution of glucose, and the two are mixed at a volume ratio of 1:(800-1200). This invention's compound biological agent combines the soil microecological regulation and root growth promotion capabilities of Bacillus subtilis engineered live bacteria with the sugar metabolism regulation effects of 3% glucose. The synergistic effect of these two agents significantly promotes beet root growth, increases the activity of beet sugar metabolism enzymes, and increases the accumulation of sucrose and soluble sugars in the tubers. Simultaneously, it improves the rhizosphere soil microecological environment of beet and enhances soil phosphorus activation capacity. This provides an environmentally friendly and efficient biological agent for high-quality and high-yield beet cultivation, and has promising agricultural application prospects.

The invention provides a preparation method, a product and application of a Fe3O4 / C composite material, and belongs to the technical field of catalysts. The preparation method of the Fe3O4 / C composite material comprises the following steps: carrying out hydrothermal reaction 1 on FeCl3. 6H2O, trisodium citrate and sodium acetate in ethylene glycol to obtain Fe3O4; and uniformly mixing the Fe3O4 and a glucose solution, and carrying out a hydrothermal reaction 2 to obtain the Fe3O4 / C composite material. By utilizing the synergistic effect of sodium citrate and sodium acetate, the invention provides a low-cost preparation method of a high-purity Fe3O4 nano material, and develops a preparation method of a Fe3O4 / C composite material taking glucose as a carbon source. Then glucose is used as a carbon source, a hydrothermal method is adopted to obtain the Fe3O4 / C micro-nano composite material, and the Fe3O4 / C micro-nano composite material has a remarkable promoting effect on biomass microwave pyrolysis.

The invention discloses a method for preparing a bacillus subtilis SL-KC3 fermentation product and application, and relates to the technical field of microorganisms, and the method comprises the following steps: culturing bacillus subtilis SL-KC3 with NA liquid to obtain bacillus subtilis SL-KC3 bacterial liquid; the preparation method comprises the following steps: mixing bran, soybean meal and water, performing steam fumigation, cooling, adding a bacillus subtilis SL-KC3 bacterial solution, uniformly mixing, and spreading in a tray; placing in a constant-temperature incubator for shallow fermentation, after fermentation for 18 hours, uniformly spraying a glucose solution on the surface layer of the culture medium, and turning over the material; after 24 hours and 36 hours, uniformly spraying water on the surface layer of the culture medium and turning over the material; after 48 hours, turning over the materials, adjusting the temperature of the culture room, and continuing to ferment until the end; after fermentation, drying and crushing are performed to obtain a bacillus subtilis SL-KC3 fermentation product; the prepared fermented feed raw material can be used for preparing a protein raw material with high small peptide content and high digestibility, and the digestibility of the protein raw material is improved.

The application discloses a preparation method of a palladium-nickel composite catalyst, and the preparation process comprises the following steps: putting 15 mL of a glucose solution with a concentration of 0.1-2.1 mol / L, 0.1-1.1 mL of an ionic liquid and 0.05-0.25 g of Ni2O3 into a high-pressure reaction kettle, and then hydrothermally treating the mixture at 140-200 DEG C for 4-14 h; after that, the obtained sample is washed, dried and calcined at 200-500 DEG C under air to obtain a precursor; 15 mg of the obtained precursor and 15 mg of PdO·H2O are put into a 5 mL centrifuge tube, distilled water is added, and ultrasonic treatment is carried out for 50-90 min to obtain a uniformly dispersed suspension; the suspension is heated in the high-pressure reaction kettle at 120-220 DEG C for 1-5 h, then filtration is carried out, and the obtained solid substance is dried at 60-90 DEG C to obtain the palladium-nickel composite catalyst. The prepared palladium-nickel composite catalyst is used for modifying a glassy carbon electrode, and performance test shows that the catalyst has excellent catalytic performance on ethanol electro-oxidation and has potential commercial application value.

The present invention discloses a fluorescent nanomaterial, a preparation method thereof and an application thereof. The method includes: obtaining calcium sulfide nanoparticles doped with rare earth ions; dispersing the calcium sulfide nanoparticles doped with rare earth ions in cyclohexane, adding polyoxyethylene nonyl phenyl ether, concentrated ammonia water and tetraethoxysilane, centrifuging after the reaction ends to obtain calcium sulfide nanoparticles doped with rare earth ions coated with silica; mixing the calcium sulfide nanoparticles doped with rare earth ions coated with silica and an amino-modified silicon source in ethanol to obtain calcium sulfide nanoparticles doped with rare earth ions coated with amino-modified silica; activating the carboxyl group of glucose oxidase, and then adding the calcium sulfide nanoparticles doped with rare earth ions coated with amino-modified silica to react to obtain the fluorescent nanomaterial. The fluorescent nanomaterial has near-infrared second-region (NIR-II) fluorescence performance and can decompose in a glucose solution to release calcium ions and hydrogen sulfide.

A method for producing silver-tungsten carbide contact material, characterized in that it comprises the following steps: S1: Adding tungsten carbide powder and a silver nitrate solution into a reaction vessel, followed by adding polyethylene glycol into the reaction vessel, vibrating and stirring with ultrasonics so that they are evenly mixed; then vibrating and stirring with ultrasonics, Adding a sodium hydroxide solution to the reaction vessel until the pH of the solution reaches 8 to 9, then further vibration and stirring with ultrasound so that they are evenly mixed, then an ultrasonic stirring is obtained, gradually adding a dextrose solution into the reaction vessel at a rate of 0.5-2 L / min, further vibrating and stirring with ultrasound, After complete precipitation of the silver ions in the solution, carrying out a reduction reaction, coating the precipitated silver on the tungsten carbide powder to form a composite powder of the tungsten carbide coated by the silver, wherein the concentration of the dextrose solution is 30-300 g / L, wherein the molecular weight of the polyethylene glycol is 500-20000, the addition amount being 7-12% of the mass of the tungsten carbide powder; where the average particle size of the tungsten carbide powder is 0.5-8 µm, where the solid-liquid ratio of the tungsten carbide powder and the silver nitrate solution is 5-70 g / L, wherein the thickness of the silver layer of the composite powder of the tungsten carbide coated with silver is 10-200 nm, where the dosage of the silver nitrate solution is converted by the dosage of the silver, and where the dosage m Agof silver is calculated using the following formula: m A g = m WC ρ A g ρ WC × 6 d 3 × ( 4 3 x 3 + xd 3 + 2 dx 2 ) , where m WC the total mass of tungsten carbide, p Ag the density of silver, p WC is the density of the tungsten carbide and d is the average particle size of the tungsten carbide powder, and where the unit for d is in µm and x is the density of the silver layer in the composite powder of the tungsten carbide coated by the silver; S2: Mixing the composite powder of the silver-coated tungsten carbide with the silver powder and pressing it into a compact; S3: Placing the compact prepared in S2 and a silver block in a sintering furnace protected by the ammonia decomposition atmosphere and performing sintering and infiltration to obtain a silver-tungsten carbide contact material.

The application discloses anti-acne stemona sessiliflora probiotic fermentation and a preparation method and application thereof, and belongs to the technical field of medicines, wherein the preparation method of the stemona sessiliflora probiotic fermentation comprises the following steps: preparing stemona sessiliflora into a suspension and adding an enzyme preparation for enzymolysis to obtain an enzymolysis product; adding the enzymolysis product, a probiotic bacterial liquid and a glucose solution into a culture medium to obtain a fermentation mixture; performing fermentation treatment on the fermentation mixture to obtain a fermentation product; performing material-liquid separation on the fermentation product to obtain stemona sessiliflora residue and a fermentation liquid; extracting the stemona sessiliflora residue with ethanol to obtain an ethanol extract; mixing the fermentation liquid and the ethanol extract, and performing alcohol precipitation, centrifugation, suction filtration and concentration treatment to obtain the stemona sessiliflora probiotic fermentation. The preparation method can decompose large molecules in stemona sessiliflora into small molecule compounds which are more easily absorbed by the body, and produce antibacterial and anti-inflammatory components, thereby increasing the bioavailability and treatment effect of stemona sessiliflora.

The application discloses a kind of transition metal single atom modified hard carbon material and its preparation method and application, belong to electrochemical energy storage material technical field.Preparation method includes the following steps: (1) in glucose solution, add transition metal ions to prepare mixed solution;(2) in mixed solution, add yeast to culture;(3) the culture obtained in step (2) is heated to boiling to deactivate yeast, obtain hard carbon precursor;(4) hard carbon precursor is washed, dried;(5) the hard carbon precursor after drying is calcined under inert gas atmosphere, i.e. transition metal single atom modified hard carbon material.The preparation strategy of hard carbon material proposed in the application has universality and high efficiency, which provides a new technical path for developing high-performance, long-life sodium-ion battery negative materials.

The present invention discloses a retarder for improving the setting time of magnesium phosphate cement, and its preparation method and application. The method comprises: (1) adding a reducing agent to a glucose solution in a protective atmosphere for hydroxylation treatment, and obtaining a hydroxylated glucose solution after the reaction is completed. (2) adjusting the pH of the hydroxylated glucose solution to alkaline, and then adding a mixed solution of NHS and EDC, and obtaining an activated glucose solution after the reaction is completed. (3) adding butenedioic acid and a catalyst to the activated glucose solution for esterification reaction, and then performing purification treatment after the reaction is completed to obtain a butenedioic acid esterified glucose derivative solution. (4) adjusting the pH of the butenedioic acid esterified glucose derivative solution to acidic, and then adding an acrylic acid monomer and an initiator, and performing a polymerization reaction under heating conditions, and then obtaining the retarder after the reaction is completed. The retarder of the present invention not only prolongs the setting time of magnesium phosphate cement, but also avoids the problem of strength loss.

The present application relates to the processing technology field of fructus aurantii, especially a fresh fruit hair protection method of fructus aurantii and application; the fresh fruit hair protection method of fructus aurantii includes that modified gelatin reaction liquid is atomized and sprayed on the surface of fresh fruit of fructus aurantii, and coated fruit is obtained; the coated fruit is placed at room temperature for 1-2h, and then baked at 35-42 DEG C for 5-10min, and coated film fruit is obtained; the coated film fruit is immersed in glucose solution for 3-5s, and coated sugar fruit is obtained; the coated sugar fruit is drained, and then baked at 35-42 DEG C for 5-10min, and then irradiated by ultraviolet light; first, a certain mechanical strength film is constructed on the surface of fresh fruit of fructus aurantii and villi by modified gelatin reaction liquid, and a hydrophobic layer is set on the film by adhesion and ultraviolet modification, first, the villi are not easy to be broken in the process of separating melon and pressing tablet, and the film improves the toughness of the outer layer of pericarp, so that the oil chamber is not easy to be broken in the baking process, and the retention effect of essential oil is further improved.

The invention discloses a determination method for improving the accuracy of special acrolein and reductants thereof, and relates to the technical field of determination of special acrolein and reductants thereof, and the determination method comprises the following steps: sucking 40% of a glycerin solution, injecting the glycerin solution into a colorimetric tube, and adding 10% of an ammonia water solution and 10% of a silver nitrate solution to form a sample solution; absorbing 0.005% of glucose solution, injecting into another colorimetric tube, and adding 10% of ammonia water solution and 10% of silver nitrate solution to form a standard solution; putting the two colorimetric tubes into a water bath at 61-62 DEG C without being covered with plugs; inserting a thermometer into the sample solution, taking out the thermometer when the temperature reaches 60 DEG C, and keeping in a dark place for 10 minutes; taking out the colorimetric tube, respectively pouring the two solutions into two clean and dry cuvettes, carrying out colorimetry by taking distilled water as a reference and adopting a spectrophotometric method, and comparing the absorbance of the standard solution and the absorbance of the sample solution. The accuracy of the measurement result can be improved.

The present invention belongs to the technical field of wastewater treatment. The present invention provides a porous carbon-coated iron carbide supported carbon nanotube composite material, a preparation method and an application thereof. The method comprises the following steps: mixing a ferric chloride solution, a glucose solution and a melamine solution to obtain a mixed solution; mixing the mixed solution and carbon nanotubes, and then sequentially drying and calcining to obtain the porous carbon-coated iron carbide supported carbon nanotube composite material. By performing porous carbon coating and carbon nanotube loading on the iron carbide nanomaterial, the obtained porous carbon-coated iron carbide supported carbon nanotube composite material has advantages such as strong ferromagnetism, high stability and strong reusability. An advanced oxidation system for efficiently removing benzo[a]pyrene in complex sewage is constructed by catalyzing persulfate, providing technical guidance for the deep treatment of benzo[a]pyrene wastewater at low temperature.

The present invention relates to a cord blood concentrated cell preparation and its use in treating premature ovarian failure. In one aspect, it relates to a cell composition made from umbilical cord blood concentrated cells, comprising concentrated cells, granulocyte macrophage stimulating factor, and an optional excipient. The ratio of the concentrated cells to the granulocyte macrophage stimulating factor is such that the concentrated cells are CD45+ / - / -. + The cell count is 5x10^6 cells: 10-15 ng of granulocyte macrophage stimulating factor; the excipient is physiological saline or 5% glucose solution; the concentration of granulocyte macrophage stimulating factor in the composition is 10-15 ng / ml. The present invention also relates to a method for preparing the composition and its pharmaceutical use. The cell preparation of the present invention exhibits excellent efficacy.

The invention discloses a lysine total nutrient fed-batch fermentation method which comprises the following steps: adding a certain amount of culture medium into a fermentation tank, inoculating a seed solution, and fermenting; when the concentration of NH in the fermentation liquor is smaller than 2 g / L or the concentration of glucose is lower than 5 g / L, full-nutrient solution feeding is carried out, and the flow speed is 600 mL / (L.h); the total nutrient solution comprises an ammonium sulfate solution, a glucose solution and a second-generation culture medium; the concentration of the ammonium sulfate solution is 350g / L; the concentration of the glucose solution is 500g / L; the defects in the prior art are effectively overcome.

The invention belongs to the technical field of carbon fiber surface modification, and discloses MoS2 nanosheet and Ag nanoparticle different-dimensional co-modified carbon fiber and a preparation method and application thereof, the preparation method comprises the following steps: desizing carbon fiber, and activating to obtain activated carbon fiber; growing MoS2 nanosheets on the surfaces of the activated carbon fibers; dipping the carbon fiber on which the MoS2 nanosheet grows in an AgNO3 solution, then adding ammonia water into the AgNO3 solution, then adding a glucose solution into the AgNO3 solution, and growing Ag nanoparticles in situ. The MoS2 nanosheet is used as a rigid stress transfer bridge to effectively transfer the load from the polyether-ether-ketone to the carbon fiber, so that the interfacial stress concentration is avoided. And the Ag nano-particles absorb fracture energy through plastic deformation, so that the effect of delaying crack propagation is achieved, and the interface bonding strength and the overall mechanical property of the composite material are improved.

The present invention relates to novel dofetilide-containing pharmaceutical formulations, particularly those that contain sodium chloride, sodium acetate, and acetic acid. The present invention further relates to dilutions of these formulations in normal saline or dextrose solutions. The present invention also provides a method of manufacturing the pharmaceutical formulations and uses of the pharmaceutical formulations and dilutions as a medicine.

A stable AST-3424 injection preparation, being a solution containing 0.1-200 mg / ml or 1-200 mg / ml of AST-3424 active pharmaceutical ingredient. A solvent in the solution contains a C2-C8 monohydric alcohol. The preparation method comprises the following steps: subjecting the AST-3424 active pharmaceutical ingredient and a partial prescription volume of ethanol to a first dissolution and formulation; adding a prescription volume of propylene glycol for a second dissolution and formulation; and then adding the remaining prescription volume of ethanol for mixing and dissolving to obtain a solution containing 1-200 mg / ml of AST-3424 active pharmaceutical ingredient. Provided is an AST-3424 injection for injection, wherein the solvent is water, a glucose solution, ethanol, or propylene glycol, the solutes consist of the AST-3424 active pharmaceutical ingredient, an isotonic regulator, and a pH regulator. The concentration of the AST-3424 active pharmaceutical ingredient of the injection is 0.001-1.000 mg / ml, the pH of the injection is 6.8-10.5, and the solution is an isotonic solution.