54results about How to "Uniform reaction system" patented technology

The invention relates to the fields of a novel chemical electric power source and a new energy material, and particularly discloses a graphene/molybdenum disulfide composite electrode material and a preparation method of the composite electrode material. The preparation method comprises the steps of: (1) preparing graphite oxide from graphite as a raw material by an oxidation and intercalation method; (2) dissolving prepared graphite oxide with deionized water, carrying out ultrasonic stripping to obtain a graphene oxide solution, then adding DMF (dimethyl formamide) and molybdate, finally adding a reducing agent, and dispersing uniformly to obtain a mixed solution; and (3) transferring the mixed solution to a reaction kettle, keeping the temperature in the temperature condition of greater than or equal to 180 DEG C for 5-10h, centrifuging and washing the product to remove DMF, and drying to obtain the graphene/molybdenum disulfide composite electrode material product. The preparation method of the graphene/molybdenum disulfide composite electrode material is simple, uniform in reaction system and low in production cost, and is particularly suitable for requirements of industrial large scale production; and the prepared product graphene/molybdenum disulfide composite electrode material has better electrochemical performances.

The invention discloses an NT-ProBNP detection kit. The NT-ProBNP detection kit comprises a calibrator, a cleaning solution, a substrate solution, a pretreatment solution, an enzyme conjugate workingsolution and a magnetic bead conjugate working solution; the pretreatment solution contains pyridine, the enzyme conjugate working solution contains NT-ProBNP antibody labeled by enzyme, and the magnetic bead conjugate working solution contains magnetic beads labeled by the NT-ProBNP antibody. The NT-ProBNP detection kit can accurately measure NT-ProBNP in a whole blood sample, the lowest limit detection of the kit is 20 pg/ml, the linearity range is 20-5,000 pg/ml, the detection sensitivity is high, the linearity range is wide, and the result is accurate. The invention further discloses a using method of the NT-ProBNP detection kit. The NT-ProBNP detection kit is simple in using step, the detection time of an NT-ProBNP is shortened, and quick and sensitive detection of the NT-ProBNP is achieved.

The invention relates to a method for preparing high-purity tenofovir disoproxil fumarate. The method comprises the following steps: preparing (R)-4-methyl-1,3-dioxolan-2-one, synthesizing (R)-9-(2-hydroxypropyl)adenine, synthesizing a tenofovir hydrate, refining by virtue of dehydrating and synthesizing tenofovir disoproxil fumarate. The corresponding product is refined and the target product is detected by dehydrating through tenofovir and using alkali-soluble acid-analysis manners, the reaction, separation and purification processes in the subsequent steps are facilitated and the purity and yield of the product are increased. The technical scheme disclosed by the invention has the advantages of simple operation, relatively inexpensive selected reagents, small side effects, high yield and less three wastes produced in the reaction and the environmental protection is facilitated.

The invention belongs to the field of in-vitro diagnostic reagent kits, and particularly relates to a myoglobin detection reagent kit and a method for applying the same. The myoglobin detection reagent kit comprises calibration products, reagents R1, enzyme conjugate working solution R2, magnetic bead conjugate working solution M, cleaning solution and chemiluminescent substrates. The reagents R1contain imidazole components, blood cells in whole blood can be quickly removed by the imidazole components, and accordingly the possibility that magnetic beads are swallowed by the blood cells can beeffectively prevented; the cleaning solution contains sodium lauryl sulfate components, accordingly, cleaning effects can be enhanced, and non-specific binding of the chemiluminescent substrates canbe prevented. The myoglobin detection reagent kit and the method have the advantages that finger peripheral whole blood or anticoagulant venous whole blood can be directly used as a to-be-detected sample for the myoglobin detection reagent kit, the whole blood sample can be directly detected without being pretreated, accordingly, the detection speed can be greatly increased, operation steps can besimplified, the application range of the myoglobin detection reagent kit can be expanded, and large-scale popularization and application can be facilitated.

The invention relates to a rapid analysis method for determining formaldehyde in electronic cigarette liquid. The method comprises the following steps that firstly, a dispersant is added to an electronic cigarette liquid sample, then a DNPH derivatization reagent and an acid solution are added to perform derivatization reaction, an alkaline reagent and an internal standard substance are added, and finally the formaldehyde content in the electronic cigarette liquid is determined through LC-MS/MS analysis. The method is high in sensitivity, strong in anti-interference performance and good in repeatability, the pretreatment process is simple and rapid, and the method is suitable for detection of electronic cigarette liquid samples on a large scale.

The invention relates to a high-temperature-resistant corrosion-resistant two-dimensional polyarylene sulfide material with functions of neutron absorption and nuclear radiation prevention, and a preparation method thereof, belongs to the field of functional polymer materials, and provides a boron-containing two-dimensional polyarylene sulfide material with a neutron absorption function, wherein the structural formula of the two-dimensional polyarylene sulfide material is represented by a formula I, and in the formula I, a molar ratio of m1 to m2 is 1-50:99-50. According to the invention, themelting point of the high-temperature-resistant corrosion-resistant two-dimensional polyarylene sulfide film with the functions of neutron absorption and nuclear radiation prevention is higher than 280 DEG C, no solvent exists at a temperature of less than 200 DEG C, the fast neutron absorption coefficient is 0.9 when the film is overlapped to a thickness of 8 CM, the gamma ray resistance can reach 10<9>, the tensile strength is larger than 60 MPa, the bending strength reaches 80 MPa, and the product is a novel special macromolecule material capable of absorbing and shielding high-energy rays.

The invention relates to a polyurethane microporous elastomer, polyether polyol is adopted as a reaction raw material and is matched with other components, so that the obtained polyurethane microporous elastomer has excellent tensile strength, tearing strength, elongation at break, wear resistance and folding resistance under the condition of relatively low density. The invention also provides a preparation method of the elastomer.

The invention provides a preparation method of a buffalo milk fat natural flavoring base material, and belongs to the technical field of food processing. The preparation method comprises the following steps of using raw buffalo milk or buffalo milk fat obtained through degreasing the raw buffalo milk as an enzymolysis substrate, performing pasteurization, and performing enzymolysis sequentially through flavored protease and lipase so as to obtain uniform semi-solid buffalo milk fat natural flavoring base material. The preparation method is simple in operating sequences and uniform in reaction systems; the product namely the flavoring base material is rich and full in flavor, rich in micromolecular peptide, amino acids and fatty acid, free from bad flavor of bitter taste and the like, and stable in quality; and the flavoring base material can be wholly applied, can also be used in a manner that after the flavoring base material is centrifuged, milk fat phases are taken to be independently used, and the flavoring base material is widely applied, and is suitable for dairy products and other various healthy foods of which the milk fragrance flavor needs to be improved.

The present invention discloses a multi-stage polymerization method for polylactic acid preparation by ring-opening polymerization of lactide, the method is as follows: molten L-lactide and a composite catalyst system are fully mixed in a ring-type static mixing reaction device comprising a corrugated plate type static mixer, the reaction device temperature is raised for initial ring-opening polymerization, then the reaction device temperature is further raised for L-polylactic acid preparation. According to the multi-stage polymerization method, by adjusting of temperature and reaction time of different stages and adjusting of reaction system flow rate and shear rate, high optical purity and molecular weight polylactic acid with the distribution meeting the requirements of spinning can be obtained. Compared with the conventional polymerization method, the multi-stage polymerization method has the advantages of simple polymerization equipment, low energy consumption, low investment, short reaction time, controllable product properties, high production magnification degree and the like.

The invention relates to the field of synthesis of inorganic compounds, in particular to a synthesis method of trans-Dichlorodiammine palladium (II). The method includes the following steps: dissolving a disodium tetrachloropalladate solution in anhydrous ethanol, and then introducing high-purity ammonia gas for reaction to generate trans-Dichlorodiammine palladium (II) through one step; leaving the solution system to stand after the reaction for aging, and then filtering; washing and drying the precipitate to obtain trans-Dichlorodiammine palladium (II). The synthesis method provided by the invention uses disodium tetrachloropalladate as a starting material and adopts a one-step synthesis method, so that the process is simple; high-purity ammonia gas is adopted, and precise control of the reaction system is achieved, so that the product purity is improved; an ultrasonic reactor is adopted, and the reaction efficiency is improved, so that the product yield reaches 99.5% or above; the product obtained through the reaction is uniform in particle size distribution, fine and loose in particles, and easy to wash and filter, so that the product purity is as high as 99.9% or above.