169 results about "Coprecipitation" patented technology

The invention relates to a preparation method and application of a composite piezoelectric catalytic material NaNbO3-coated BiFeO3 for rapidly degrading antibiotics, NaNbO3 is flaky crystal grains with [001] crystallographic orientation prepared by a two-step molten salt method, and BiFeO3 is micro-nano particles prepared by a coprecipitation method. Composite micro-nano BiFeO3 powder and [001] oriented NaNbO3 flaky grains form a heterojunction, conversion of mechanical energy and electric energy of the material is achieved under the ultrasonic vibration condition, inductive charges are generated on the surface of the material, and photon-generated carriers move reversely under driving of a built-in electric field. According to the invention, the piezoelectric catalytic degradation capability of the BiFeO3 and NaNbO3 composite piezoelectric catalytic materials with different proportions on four antibiotics, namely oxytetracycline, levofloxacin, carbamazepine and paracetamol in different time periods is researched. When the mass ratio of the BiFeO3 to the NaNbO3 composite material is 1: 3, the oxytetracycline degradation rate within 30 min can reach 78.2%, the oxytetracycline degradation rate within 120 min can reach 91.8%, and the piezoelectric electro-catalysis characteristic is rapid and efficient. The method disclosed by the invention has important significance in developing a high-efficiency piezoelectric catalyst for degrading antibiotics.

The invention discloses an anti-soluble transferrin receptor monoclonal antibody as well as a preparation method and application thereof, and belongs to the technical field of antibody detection. According to the antibody, an L101-F760 amino acid sequence of human TfR protein is used as an immunogen, specific screening of B cells, reverse RNA (Ribonucleic Acid) into cDNA (Complementary Deoxyribose Nucleic Acid) through RT-PCR (Reverse Transcription-Polymerase Chain Reaction), then homologous recombination is performed to construct heavy and light chain vectors, and finally multiple rounds of screening are performed to obtain the purified sTfR monoclonal antibody, so that the sTfR protein can be specifically recognized, and the antibody has the advantages of high specificity and high sensitivity and can be widely applied to the field of immunotherapy. The natural sTfR protein in human serum can be recognized. The kit is applied to the detection and screening fields of immunohistochemistry, immunofluorescence chemistry, western blot, co-immunoprecipitation, indirect ELISA, flow cytometry and the like, especially has low background and no interference of non-specific binding impure protein during immunohistochemistry detection, can obtain more accurate detection and evaluation results, avoids interference of false positive and false negative, and has high detection accuracy. The method has great application value in the aspects of basic scientific research and clinical pathology detection.

The invention discloses a process method for preparing high-spinning nano pyrite through physical field-chemical method coupling regulation and control, which comprises the following steps: dissolving bovine serum albumin in deionized water, adding an iron source, uniformly mixing, adjusting the pH value of the solution to 10.0-11.0, adding a sulfur source, and uniformly mixing, thereby obtaining the high-spinning nano pyrite. Carrying out a coupling regulation reaction of a physical field and a chemical method on the reaction system under the protection of inert gas, and then dialyzing and purifying to prepare the high-spin-state FeS2 nanosheet. The chemical method comprises one or more of a coprecipitation method, a solvothermal method and a hydrothermal method; the physical field comprises one or more of an alternating magnetic field, a static magnetic field and a rotating magnetic field. Through coupling regulation and control of a physical field and a chemical method, accurate conversion of the FeS2 nanosheet from a low spinning state to a high spinning state is realized, chemical doping can be effectively avoided, natural biological suitability of FeS2 is reserved, and the method has a good clinical conversion application prospect.

The invention discloses a magnetic biochar coupled dynamic membrane synergistic pollution reduction and flora regulation method, which comprises the following steps: adding magnetic biochar into an anaerobic dynamic membrane bioreactor for anaerobic digestion reaction, and adding 1.2-1.5 g of magnetic biochar into each liter of sludge mixed liquid in the anaerobic dynamic membrane bioreactor. The magnetic biochar is composed of a honeycomb-shaped carbon material obtained by pyrolyzing carbon through sodium citrate and Fe3O4 loaded on the surface of the honeycomb-shaped carbon material through a chemical coprecipitation method. According to the method, functional microorganisms such as methane filamentous bacteria and methane rod bacteria can be selectively enriched, the methane yield is increased by 30%-35%, membrane pollution is effectively relieved by improving the sludge floc structure, the service life of the membrane is prolonged, and technical support is provided for low-cost and low-energy-consumption operation of the anaerobic membrane bioreactor.

The invention relates to the field of microorganisms, in particular to cucumber Chryseobacterium G1 and application thereof. The cucumber Chryseobacterium sp. G1 is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC No.32659, and the preservation date is November 15, 2024; according to the present invention, the suggested classification name is Chryseobacterium cucumerii, and the preservation number is CGMCC (China General Microbiological Culture Collection Center); by adding calcium ions, the cadmium resistance of the cucumber Chryseobacterium G1 is enhanced, the tolerance concentration is increased from 20 mg / L to 120 mg / L, co-precipitation of cadmium carbonate and calcium carbonate is promoted, and the stability is improved; chicken manure is used for providing a nitrogen source and organic matters, and meanwhile, the activation effect of the chicken manure on cadmium is blocked through the ammoniation effect of cucumber Chryseobacterium G1.

The invention belongs to the technical field of adsorbents, and discloses a core-shell structure composite material as well as a preparation method and application thereof. Ferroferric oxide is loaded on biochar by coprecipitation of ferric salt, ferrous salt and biochar, amination modification is performed by using polyethyleneimine, and a COF shell layer is prepared in situ by using a magnetic core. The shell layer is chemically connected with the magnetic core, and is coated by the COF shell, so that the structural stability is improved, the porous structure of the biochar is not easy to collapse, and the magnetic particles are not easy to fall off; the shell contains sulfonic acid groups, has electronegativity, and is combined with metal ions through electrostatic interaction, so that the adsorption sites of the adsorbent are increased. Meanwhile, the COF shell is of a porous structure, the specific surface area is large, the COF shell has the adsorption effect on metal ions, more adsorption sites are provided for the metal ions through the multiple adsorption effects of the COF shell and the magnetic core, and the removal rate is effectively increased.

The invention provides a composite modified ternary precursor and a preparation method and application thereof.The preparation method comprises the following steps that a nickel-cobalt-manganese ternary mixed salt solution, a precipitator solution, a boron source solution and a complexing agent are injected into a base solution in a parallel flow mode for a first coprecipitation reaction, and a first precursor is obtained; stopping injecting the nickel-cobalt-manganese ternary mixed salt solution, continuously injecting the precipitant solution, the boron source solution and the complexing agent, and carrying out a second coprecipitation reaction to obtain a composite modified ternary precursor; wherein the flow rate of the boron source solution is gradually increased at the speed of 0.02 L / h to 0.2 L / h. According to the invention, the boron gradient doped and coated composite modified ternary precursor is prepared by adjusting the feeding type and the doping mode in the coprecipitation process, so that the structural stability of the precursor can be improved, and the capacity and the cycle stability of the ternary material can be improved.

The invention relates to a preparation method of a multifunctional nano growth-promoting bacterium for overcoming successive cropping obstacles, which comprises the following steps: converting bacillus subtilis into bacillus subtilis spores under the condition of heating or inoculating bacillus subtilis into a sporulation culture medium containing manganese sulfate, preparing iron nanoparticles by using a chemical reducing agent and a coprecipitation method under the protection of inert gas, and carrying out vacuum drying on the iron nanoparticles to obtain the multifunctional nano growth-promoting bacterium for overcoming successive cropping obstacles. The preparation method is simple, the cost is low, the production process is green and environment-friendly and suitable for large-scale production, the prepared nano growth-promoting bacteria can integrate the biological functions of the iron nanoparticles and the bacillus subtilis, the soil fertility is improved, trace elements are supplemented, and meanwhile the biological functions of the iron nanoparticles and the bacillus subtilis are improved. The fertilizer promotes proliferation of beneficial bacteria, inhibits proliferation of harmful bacteria, improves the utilization rate of nutrients, degrades harmful substances, improves stress resistance of crops, realizes dual promotion of soil improvement and crop growth, and has remarkable social and economic benefits.

The present invention belongs to the field of nano drug preparations, and discloses a multifunctional nanozyme platform and its preparation method and application, which is mainly composed of nanozymes, carrier materials and targeting substances. The synthesis of nanozymes, the loading of nanozymes on carrier materials and the modification of their surface targeting substances are carried out by methods such as stirring synthesis, coprecipitation, strong acid oxidation, chemical reduction, covalent bonding, solvent thermal method, physical adsorption, etc. The targeting substance on the surface of the nanozyme platform can be accurately and efficiently positioned to the inflammation site, and the acidic microenvironment of the inflammation site causes the targeting substance and the carrier material to undergo structural depolymerization, thereby releasing a variety of nanozymes, which not only realize the self-cascade and synergistic catalytic enhancement of enzymes at the inflammation site, but also form a substrate self-circulation catalytic system, thereby achieving the effect of efficiently alleviating and treating various inflammation-related diseases.

This invention discloses a quaternary ammonium salt / magnetic biochar composite material, its preparation method, and its application. Rice husk-based biochar is prepared using agricultural waste as raw material. Magnetic iron-based biochar is synthesized through an alkaline chemical co-precipitation method. Then, it is combined with quaternary ammonium salt compounds via ion exchange to form a quaternary ammonium salt / magnetic biochar composite material. The obtained composite material exhibits significant bactericidal effects and superior slow-release quaternary ammonium salt performance. Furthermore, the used quaternary ammonium salt / magnetic biochar composite material can be used to prepare a regenerated quaternary ammonium salt / magnetic biochar composite material, with better bactericidal effects than the initial use, achieving the recycling and reuse of the composite material. The preparation method of this invention uses widely available and inexpensive raw materials. The obtained composite material adsorbs free bacteria through high-density charge adsorption, avoiding the development of drug resistance and secondary environmental pollution. It can be applied to wastewater treatment, providing a new material and method for solving the problem of pathogenic bacteria pollution in water bodies.

The invention provides a precursor containing primary particles distributed in the radial direction and a preparation method and application thereof.The preparation method comprises the steps that a mixed metal source solution, a complexing agent solution and a precipitator solution are subjected to a first coprecipitation reaction, and a core is obtained; in oxygen-free protective gas, increasing the flow of the mixed metal source solution, the complexing agent solution and the precipitator solution, and carrying out second coprecipitation reaction to obtain a core coated with a compact layer; in an oxygen-containing atmosphere, introducing the mixed metal source solution, the complexing agent solution, the precipitator solution and the doped metal source solution, and carrying out a third co-precipitation reaction to obtain a precursor; the pH and complexing agent concentration of the third co-precipitation reaction are smaller than those of the second co-precipitation reaction and are smaller than those of the first co-precipitation reaction. According to the preparation method, the precursor comprises the primary particles distributed along the radial direction by regulating and controlling the conditions of the coprecipitation reaction at each stage, so that the performances such as circulation and rate of the positive electrode material are improved.

The application belongs to the technical field of gas sensing material preparation, and discloses an Ag / AgCl modified Co3O4 nano-composite material, a preparation method and application, and comprises the following steps: dissolving inorganic compounds of Ag elements and inorganic compounds of Co elements in deionized water, adding a proper amount of NaCl solution first, then adding N2H4.H2O solution, and obtaining Ag / AgCl loaded alpha-Co(OH)2 nanosheet material by using coprecipitation and in-situ reduction method; and drying and sintering the Ag / AgCl loaded alpha-Co(OH)2 nanosheet material to obtain the Ag / AgCl modified Co3O4 nano-composite material. The application provides a preparation method of a low-temperature high-response gas sensing material, the prepared Ag / AgCl loaded Co3O4 material has higher ethanol gas response performance, can significantly reduce the optimal working temperature of the sensing material, has potential application prospect, and can be used for monitoring alcohol pollutant gases in atmospheric environment, chemical plant environment, home environment and the like.

The invention belongs to the technical field of drug carriers, and particularly relates to a magnetic nano-drug carrier which is prepared by the following steps: selecting traditional Chinese medicine raw materials and auxiliary raw materials, and selecting corresponding equipment for treating the raw materials; traditional Chinese medicine raw materials are pretreated, effective components are extracted through ultrasonic and reflux combination, and finally an extracting solution is purified and concentrated; preparing through a coprecipitation method; the flexible traditional Chinese medicine dressing is prepared by taking anti-inflammatory, analgesic, blood-activating and blood-stasis-removing active ingredients of 19 traditional Chinese medicines as cores and combining with the local magnetic response enrichment characteristic of the magnetic nano-carrier, the flexible traditional Chinese medicine dressing is attached to a pressurized silica gel pad of a PCI postoperative wrist strap for use, local directional enrichment of the active ingredients of the traditional Chinese medicines in a wound is promoted through the magnetic carrier, and the wound healing effect is improved. The pressurizing silica gel pad has the synergistic effects of resisting inflammation, easing pain, improving microcirculation and dredging collaterals and restoring the pulse, solves clinical pain points such as inflammation edema, obvious pain and unsmooth local blood supply of a wrist puncture wound after the PCI operation, and meets the requirements of flexibility, ventilation and fitting of the pressurizing silica gel pad at the same time.

The invention provides a core-shell structure composite flame-retardant synergist, a preparation method and application thereof, an intumescent fireproof coating, and preparation and application thereof, and belongs to the technical field of fire-fighting materials. Through a coprecipitation method, ammonium polyphosphate APP and melamine MEL which exist independently traditionally are compounded and assembled at a molecular level on the surface of a zinc borate particle serving as an anchor point to form a core-shell integrated functional particle. At the high temperature of a fire, due to close contact and extremely short reaction path of APP and MEL of the shell layer, violent dehydration, gasification and cross-linking reaction can be instantly generated, strong expansion driving force with more controllable directionality is generated, the expansion efficiency is greatly improved, and the coating fire resistance, carbon layer quality and durability of the fireproof coating can be remarkably improved.

The present invention belongs to the technical field of sensorineural hearing. Provided is the use of SPTBN1 as a target in the treatment of GJB2-related sensorineural hearing loss. The use comprises: the construction of a stably transfected cell line, wherein: HEK293T cells are cultured using a DMEM culture medium supplemented with 10% fetal bovine serum and 1% penicillin-streptomycin in a humidified incubator at 37ºC with 95% air and 5% CO2, and when the cells reach 80%-90% confluence, cell passage is performed; IP-MS analysis, wherein: protein complexes are purified using Protein A / G immunoprecipitation magnetic beads, a portion of the extracted proteins is used as input, and then 2 μg of anti-Cx26 antibody is added to the remaining protein extract, same are gently pipetted and mixed, and incubated on a rotating shaker at 4℃ overnight; immunofluorescence observation of the co-localization of Cx26 and SPTBN1, wherein: a stably transfected cell line expressing WT-Cx26 and Mut-Cx26 is constructed; and co-immunoprecipitation (Co-IP) validation, wherein: a stably transfected cell line expressing WT-Cx26 is constructed. The present invention overcomes the limitations of therapeutic methods, such as the relatively low targeting specificity and short therapeutic time windows associated with full-length protein supplementation via gene therapy, thereby providing new insight into GJB2-related hearing loss, and a new target and a new treatment for same.

In order to solve the technical problems of difficult dewatering of fluorine-containing sludge and difficult recycling of ordinary chemical filter aids, the application relates to a reusable filter aid for filtering and dewatering fluorine-containing sludge and a preparation method thereof. The main component of the filter aid is alkyl carboxylic acid modified magnetic ferroferric oxide nanoparticles. The preparation method comprises the following three steps: (1) preparing magnetic ferroferric oxide nanoparticles by using a coprecipitation method, (2) amino modification of the surface of the magnetic ferroferric oxide nanoparticles, and (3) alkyl carboxylic acid modification of the magnetic ferroferric oxide nanoparticles. Compared with the prior art, the application has the advantages of simple preparation method, excellent filter aid effect (significantly shortened filtering time and significantly reduced water content of sludge filter cake), stable reuse performance and the like, and has a good application prospect.

The invention discloses superfine high-dispersion type nano TiO2 as well as a preparation method and application thereof, and the preparation method of the superfine high-dispersion type nano TiO2 comprises the following steps: adding a TiCl4 solution into a base solution containing ammonium polycarboxylate, polyether modified siloxane and ammonia water, and carrying out coprecipitation reaction to prepare the nano TiO2. According to the preparation method, through the synergistic effect among ammonium polycarboxylate, polyether modified siloxane and ammonia water in the base solution, nano TiO2 which is good in dispersity, uniform in particle size, spherical in microstructure, 5-10 nm in particle size and has a mixed phase of a rutile phase and an anatase phase is prepared, the preparation process is mild in reaction condition, simple in equipment requirement, short in process route and suitable for industrial production, and the preparation method is suitable for industrial production. The industrial production is easy, and the application field of the superfine high-dispersion type nano TiO2 is greatly widened.

The present invention provides a preparation method for a nano-drug composite dynamic cross-linked hydrogel with curcumin / nitric oxide / photothermal synergistic antibacterial effect. The present invention uses copper salt to chelate curcumin to form first nanoparticles, and then uses polydopamine to coat the first nanoparticles to form nano-drug P Cur Sodium nitroprusside and sodium phytate were used as raw materials and nano-coprecipitation method was used to prepare second nanoparticles; polydopamine was then used to coat the second nanoparticles to prepare a core-shell structure nano drug P NO ; The nano drug P cur and P NO The nanocomposite hydrogel is mixed evenly with carboxymethyl chitosan and oxidized hyaluronic acid to form a nanocomposite dynamically cross-linked hydrogel. In addition to its significant antibacterial properties, the nanocomposite hydrogel of the present invention also has significant advantages such as high antibacterial efficacy, good biosafety, convenient preparation, and low cost. The present invention also combines drug, photothermal, and gas therapy in a single device, facilitating synergistic and precise bacterial elimination.

The invention relates to the field of water treatment materials, and provides a wide-pH-adaptability fish scale-based composite adsorption material as well as a preparation method and application thereof. The method comprises the following steps: activating a natural hydroxyapatite structure in fish scales through acid-alkali synergism, and introducing an aluminum group through coordination coprecipitation to form a composite material with a double defluorination mechanism of calcium precipitation and aluminum coordination. The removal rate gt of the material to 10mg / L fluorine ions within the pH range of 4-12; the adsorption rate is 90%, and the theoretical maximum adsorption capacity reaches 100.19 mg / g; experiments show that the material is not interfered by coexisting anions, has high efficiency, wide pH adaptability and environmental friendliness, and provides an innovative solution for fluorine-containing wastewater treatment.

The application discloses a preparation method and application of a rubidium and cesium adsorbent, and relates to the mixing of a certain amount of a complexing agent, a salt solution A and a salt solution B, the regulation of the coprecipitation reaction process of the salt solution A and the salt solution B by the complexing agent, and the preparation of the rubidium and cesium adsorbent. The rubidium and cesium adsorbent prepared by the method has high adsorption capacity, high adsorption selectivity and high stability, and can realize the effective separation of rubidium and cesium from brine.

A preparation method of a medium-entropy perovskite oxygen carrier comprising: 1) preparing an aqueous solution from metallic nitrate serving as a raw material, performing a coprecipitation reaction w

The application belongs to the technical field of catalysts, and relates to a catalyst and a preparation method and application thereof. Specifically, the catalyst is a phosphorus-doped cobalt-rhodium composite oxide catalyst, and the preparation method is that different atomic ratios of Rh and P are doped in Co3O4 by using a coprecipitation method and a hydrothermal method. The method for preparing 2,3-dichloropyridine by using the catalyst has simple process and mild reaction conditions, can effectively control excessive dechlorination of polychloropyridine, reduce generation of by-products, the conversion rate of raw materials can reach 98%, the selectivity of the target product 2,3-dichloropyridine reaches 95%, and the mild reaction conditions have low requirements on equipment and small demand on energy, and are suitable for industrialized production.

The present invention discloses a method for preparing a dual-enzyme inorganic functional nanoflower and its application in preparing a competitive ELISA kit for detecting Clonorchis sinensis. This invention belongs to the technical field of Clonorchis sinensis detection. The present invention provides a method for preparing a dual-enzyme inorganic functional nanoflower composite material. The composite material is prepared by reacting a Clonorchis sinensis monoclonal antibody, HRP, and a copper phosphate solution at room temperature for 12-48 hours, followed by coprecipitation to obtain the functional nanoflower composite material. By utilizing the ability of HNFs to catalyze the substrate TMB, the method overcomes the species restrictions imposed by traditional enzyme-labeled secondary antibodies, improves detection sensitivity, and enables multi-host detection of Clonorchis sinensis.

The invention provides a phospholipid coated silver / manganese dioxide coprecipitation particle MRI contrast agent and a preparation method and application thereof. The prepared contrast agent has efficient MRI contrast performance, and compared with a traditional gadolinium-based contrast agent, the biological safety is higher, and the risk of heavy metal ion leakage is avoided; the contrast agent has the advantages that the contrast agent is high in targeting ability and accurate in targeting ability, phospholipid layer modified cRGD targeting molecules can specifically recognize high-expression integrin alpha v beta 3 on the surfaces of tumor cells, enrichment of the contrast agent in tumor tissues is realized, and imaging resolution and focus positioning accuracy are improved. The nano-silver / manganese dioxide composite material has good biocompatibility and multifunctional diagnosis and treatment integrated potential, creatively combines a silver / manganese dioxide coprecipitation core and a phospholipid wrapping structure, has good magnetic resonance imaging (MRI) contrast performance and biocompatibility, and shows remarkable application potential in the medical imaging fields of tumor targeted imaging, disease diagnosis and the like. And a new direction is provided for the development of MRI contrast agents.

The invention discloses a magnetic enzyme carrier for water pollution control and a preparation method thereof. The carrier adopts a core-shell structure design, Fe3O4 nanoparticles are used as a magnetic core, and after functional coating of 3-aminopropyltriethoxysilane, laccase, peroxidase and other environmental governance enzymes are immobilized on the surface of the carrier through glutaraldehyde crosslinking. The carrier has excellent magnetic response performance. The preparation method adopts a three-step process of chemical coprecipitation, silanization and enzyme immobilization, and is mild in condition, simple and convenient to operate, low in cost and easy for industrial production. The method has the advantages that the method is simple, the method is applicable to removal of organic pollutants such as phenols, anilines and dyes during water pollution treatment, the treatment cost is lower than that of free enzymes, the method has remarkable environmental benefits and economic values, and important technical support is provided for industrial application of enzymatic water treatment technologies.

The invention provides a preparation process of a hydrotalcite corrosion inhibitor, and relates to the technical field of metal corrosion protection. The preparation process of the hydrotalcite as the corrosion inhibitor comprises the following steps: raw material proportioning, coprecipitation reaction, hydrothermal crystallization, post-treatment and composite material preparation. According to the invention, the composite hydrotalcite containing organic phosphonate radicals and inorganic anions among layers is prepared by a coprecipitation-hydrothermal synthesis method. The corrosion inhibitor forms a compact protective film on the metal surface by utilizing the synergistic adsorption effect of composite anions, the corrosion inhibition efficiency can reach 95% or above, and the corrosion inhibitor has the characteristics of simple process, environmental protection and high efficiency, and is suitable for metal corrosion prevention in the fields of industrial circulating water, oilfield water injection and the like.

A single crystal NCMA quaternary precursor and a preparation method thereof.A single crystal NCMA quaternary precursor has a chemical formula of Ni a Al b Zr c (OH)2·Ni d Co e Mn f (OH)2.The preparation method comprises the following steps: one, preparing a first metal liquid of Ni, Zr and a complexing agent A, preparing a second metal liquid of Ni, Co, Mn and H2O2, preparing a precipitant, preparing a complexing agent B, and preparing a mixed solution; two, simultaneously adding the first metal liquid, the precipitant and the mixed solution into a kettle for co-precipitation, the volume of the first metal liquid added per hour is 6-9% of the effective volume of the kettle, and the volume of the mixed solution added per hour is 1.5-2.2%; the solid content is controlled to be 1.2-1.3 g / mL, the pH value is kept at 11.8-12.2, and the concentration of the complexing agent A is 0.1-0.2 mol / L; a core layer Ni a Al b Zr c (OH)2 is obtained after T1 hours; the adding of the first metal liquid and the mixed solution is stopped, the second metal liquid and the complexing agent B are changed, reaction is carried out for T2 hours, the D50 of the slurry reaches 3.1-3.9 um, and the reaction is stopped; three, the co-precipitation product is subjected to pressure filtration, washing and drying to obtain the single crystal NCMA quaternary precursor.The Al in the single crystal NCMA positive electrode material prepared by the method is uniformly distributed, and the electrical performance is good.

The invention provides a photolysis group-containing antibody, a method and a kit for co-immunoprecipitation sequencing. The photolysis group-containing antibody comprises a first antibody and a linker reagent label, and the first antibody is subjected to photolysis-bifunctional labeling through a linker reagent; the linker reagent comprises three active groups R1, R2 and R3; wherein R1 is used for covalent linkage with a first antibody; r2 is a photolysis group and fractures under illumination of a preset wavelength, so that connection between R1 and R3 is broken; r3 is used for carrying out binding reaction with a solid-phase substrate; r1, R2 and R3 are connected through a length-adjustable flexible chain, and the length-adjustable flexible chain is of a polyethylene glycol or carbon chain structure; according to the method, interference of complex backgrounds in cell samples can be reduced, the sample input quantity is reduced, and low-abundance epigenetic modification is realized.

The invention discloses a rare earth oxygen storage material preparation device and method based on a coprecipitation method, and relates to the technical field of material preparation.The rare earth oxygen storage material preparation device comprises a precipitation tank and a base fixedly connected to the lower surface of the precipitation tank and used for keeping the device stable, and a drain valve penetrates through the bottom end of the outer surface of the precipitation tank. The precipitation tank is used as a main aging and standing precipitation space for accommodating a rare earth salt solution and a precipitation product, and is provided with a drain valve for discharging the precipitation product generated by standing of the precipitation tank; the mixing mechanism is used for mixing and stirring a solution, the mixing box is arranged on the outer surface of the mixing mechanism, meanwhile, a pH detector is arranged in an inner cavity of the mixing box, the pH value of the internal solution can be monitored in real time, and the mixing mechanism is arranged to serve as a core stirring assembly to be used for fully mixing and stirring the solution; the effect of slowly and uniformly dripping the precipitant into the rare earth salt solution is achieved.

The application discloses an LDH-based vaccine adjuvant and a preparation method and application thereof, and belongs to the technical field of aluminum adjuvant preparation of vaccines, and the preparation method comprises the following steps: mixing at least one of soluble magnesium salt, soluble zinc salt, soluble manganese salt and soluble calcium salt with soluble aluminum salt, and then performing a co-precipitation reaction with a sodium hydroxide aqueous solution in a colloid mill device, and performing crystallization to obtain LDH nanosheets; dispersing the LDH nanosheets in a PBS solution, adding a hepatitis B surface antigen molecule drug, uniformly mixing, and then performing centrifugation to obtain the LDH-based vaccine adjuvant. The LDH-based vaccine adjuvant can significantly promote the maturation of DC cells and the activation of T cells, and the total IgG level reflects the overall humoral immune response intensity of the body to vaccines or pathogens; the LDH-based vaccine adjuvant forms a "storage library" at an injection site to store antigens and slowly release the antigens, and the purpose of long-time continuous stimulation of the immune system in the body is achieved.