66results about How to "Selective" patented technology

The present invention provides a stacked cascade GaN-based power device and a packaging method thereof. The device structure is a DBC double-sided ceramic substrate with through holes and grooves bonded on a TO-220 frame, a GaN-based chip bonded in the groove of the DBC ceramic substrate, and a vertically structured silicon-based MOSFET stacked on the source of the GaN-based chip to form a Cascode cascade structure. The present invention realizes the Cascode cascade structure by rationally arranging the GaN-based chip and the silicon-based MOSFET chip, thereby reducing the area of ​​the frame occupied by the chip, reducing the volume of the package body and improving the selectivity of the packaging form; the high thermal conductivity DBC double-sided ceramic substrate with through holes and groove structures increases the contact area between the chip and the high thermal conductivity material, improves the heat dissipation performance of the chip, optimizes the process steps, and improves the reliability and practicality of the device.

The utility model belongs to the technical field of powder metallurgy powder preparation, and particularly relates to a gradient annular groove ball milling tank which is applied to development and research of novel composite materials and metallurgical technologies. When a traditional ball milling tank with a smooth inner wall is used for preparing flaky metal powder, the consumed time is long, the powder loss is large, impurity elements are easy to introduce, and particularly, hard metal powder (such as titanium and tungsten) is difficult to mill into flaky metal powder. According to the gradient annular groove ball-milling tank provided by the utility model, the gradient annular inner groove is formed in the inner wall of the ball-milling tank, so that the stress condition and the collision mode of metal powder and the ball-milling tank under the action of ball-milling beads can be optimized, and the metal powder is converted into a sheet shape with high efficiency and low loss. The inner molded surface of the gradient annular groove ball milling tank is a cylindrical surface, and a plurality of annular grooves are distributed in the inner molded surface in the height direction; wherein the section of the annular groove is in a semi-elliptical arc shape, and the ellipticity of the annular groove from the top to the bottom is gradually reduced.

The invention relates to a nickel-based methanation catalyst taking a mesoporous molecular sieve SBA-16 as a carrier and application of the nickel-based methanation catalyst in carbon dioxide hydrogenation. The catalyst is prepared by preparing a mesoporous molecular sieve SBA-16 as a carrier, dissolving nickel salt in a solvent, adding an additive, and combining the SBA-16 carrier with nickel metal by an impregnation method. The catalyst has high activity and good stability, especially has excellent performance in a CO2 methanation reaction, can realize high CO2 conversion rate and high CH4 selectivity at a low temperature, and is suitable for reaction conditions with a temperature of 200-400 DEG C and a pressure of normal pressure to 5.0 MPa. The preparation method of the catalyst is simple, does not need precious metal, and has potential industrial application prospects.

The invention discloses an aryl piperidine compound as well as a preparation method, a pharmaceutical composition and application thereof. The structure of the compound is shown in a formula (I), the compound further comprises an isomer, a prodrug, a stable isotope derivative, pharmaceutically acceptable salt or a mixture of the isomer, the prodrug, the stable isotope derivative and the pharmaceutically acceptable salt, and the compound has a remarkable PRMT5 enzyme inhibition effect and is higher in inhibition activity in the presence of MTA; meanwhile, the inhibitory activity on MTAP-deficient tumor cells is higher than that of a wild type, and selectivity is achieved; the compound has good activity at the molecular level and the cellular level and is wide in application; the preparation method is high in universality and easy for compound structure expansion. # imgabs0 #

The invention discloses a method for enriching < 7 > Li through electrodialysis coupling extraction, which comprises the following steps of: connecting a plurality of functional membranes in series and coupling for enriching < 7 > Li through electrodialysis, respectively placing a supply phase and a receiving phase on two sides of the functional membranes, and adjusting the volume ratio of the supply phase to the receiving phase to be (1-100): (1-100) by controlling the flow rates of the supply phase and the receiving phase through PID (Proportion Integration Differentiation), and electrifying the electrodes on the two sides of the plurality of functional membranes which are connected in series, applying voltage with the voltage of-20 to 20V for 3 seconds to 120 minutes, and extracting and separating the Li isotope. According to the method, the Li isotope is subjected to cascade separation through an electrodialysis coupling membrane technology, so that the selectivity of 7Li is increased, the separation and enrichment effect of the 7Li isotope is improved, and the abundance of the 7Li natural stable isotope can be improved from 92.47% to 5N level through 102-level cascade.

The invention relates to the technical field of nano materials, in particular to a CoMo-BTNT anode, a preparation method and application thereof, and the preparation method comprises the following steps: preparing a Ti substrate; preparing a titanium dioxide nanotube array by using a Ti substrate; co-Mo oxide layer deposition liquid is deposited on the surface of TNA through a direct-current electrodeposition method, then annealing heat treatment is conducted, and CoMo-TNA is prepared; preparing a CoMo-BTNT anode by taking CoMo-TNA as a cathode and a Pt sheet as an anode; the invention also provides an application of the CoMo-BTNT anode in degradation of antibiotics in water. According to the invention, TNA is used as a base layer, an active CoMo oxide layer is deposited on the TNA base layer, the TNA base layer has good electrical conductivity and electro-catalytic performance, the electrical conductivity of the anode is improved, an effective electrically-assisted activated PMS degradation tetracycline system is constructed, and a new solution thought is provided for treatment of tetracycline wastewater.

The invention provides a pyrroline diketone compound as well as a preparation method and a bactericide application thereof. The name of the pyrroline diketone compound is 1-(2, 6-diethyl-4-methylphenyl)-1H-pyrrole-2, 5-diketone, and the structural formula of the pyrroline diketone compound is shown as a formula I. The pyrroline diketone compound and an agricultural bactericide taking the compound as an effective component are used for preventing and treating various plant diseases caused by plant pathogenic fungi, oomycetes and bacteria. The compound is novel in structure and action mechanism, convenient in synthesis method and good in safety, has broad-spectrum and efficient antibacterial activity, does not have cross resistance with other existing bactericides, can be used for preventing and treating plant diseases of vegetables, fruits, food crops, oil crops, commercial crops, garden crops, traditional Chinese medicinal materials and the like, and has broad application prospects. And particularly, the composition has good chemical protection effect and systemic treatment effect on drug-resistant crop diseases.

The invention discloses a C3 aryl formyloxylated 4H-pyrido [1, 2-a] pyrimidine-4-ketone derivative and a synthesis method thereof, and belongs to the technical field of organic photocatalytic synthesis. Aiming at the problems that a noble metal catalyst, a strong oxidant, a photosensitizer which pollutes the environment, a toxic solvent and the like exist in the current C3-H functionalization of a 4H-pyrido [1, 2-a] pyrimidine-4-ketone derivative and the aryl formyloxylation of a heterocyclic compound, the method disclosed by the invention is characterized in that the 4H-pyrido [1, 2-a] pyrimidine-4-ketone derivative is synthesized under the condition of room-temperature air and the irradiation of 410-415nm purple light. The preparation method comprises the following steps: reacting 4H-pyridino [1, 2-a] pyrimidine-4-ketone with a peroxide aryl formyl compound in a dimethyl carbonate solvent to generate a C3 aryl formyloxylated 4H-pyridino [1, 2-a] pyrimidine-4-ketone derivative; the method does not need to add any oxidant or photocatalyst, and has the advantages of simplicity and convenience in operation, mild conditions, easily available raw materials, environmental friendliness, excellent compatibility of substrate functional groups, high reaction yield and the like.

The high-airtightness type air volume adjusting valve comprises a valve outer frame, a valve plate supporting frame is fixedly connected to the inner side of the valve outer frame, a bearing is arranged on the inner side of the valve plate supporting frame, a valve plate rotating shaft is movably connected to the inner side of the bearing, and a transmission connecting rod is arranged on the right side of the valve plate rotating shaft; a valve plate body is fixedly connected to the surface of the valve plate rotating shaft, a driving assembly is fixedly connected to the left side of the valve outer frame, the output end of the driving assembly is fixedly connected with the valve plate body, and a stainless steel elastic contact sealing piece is arranged on the inner side of the valve outer frame. According to the air volume adjusting valve, the phenomenon that air leakage is prone to occurring due to insufficient leakproofness in the prior art is changed, the stainless steel elastic contact sealing pieces are arranged between the valve outer frame and the valve plate bodies, the elastic rubber strips and the silica gel sealing strips are arranged between the valve plate bodies, and therefore the air leakage phenomenon cannot occur; therefore, the phenomena of energy waste and system efficiency reduction are avoided, and the environmental quality and the experimental result are not influenced.

The utility model provides a garage fireproof rolling shutter door installation structure which comprises a rolling box and an installation mechanism, a fireproof frame is fixedly connected to the outer side surface of the rolling box, a rolling shutter body is installed on the inner side surface of the rolling box, the installation mechanism is arranged on the outer side surface of the rolling box, a fireproof mechanism is arranged on the top surface of the rolling box, and the fireproof frame is fixedly connected to the outer side surface of the rolling box. Through the arrangement of the mounting mechanism, flexibility and multifunctionality are achieved, the mounting mode can be changed by rotating the base and the supporting frame, meanwhile, the wall perforating device is suitable for the situation that a wall cannot be perforated or temporary mounting is needed and the situation that permanent mounting is needed or perforating can be achieved, switching is easy and convenient, and the wall perforating device is suitable for different mounting situations; greater flexibility and selectivity are provided, the complexity and cost of installation are reduced, and the stability and safety of the door are ensured at the same time.

This application belongs to the field of medicinal chemistry and relates to fused imide derivatives of Formula I, their preparation methods, pharmaceutical compositions containing the compound, and their use in treating related diseases (e.g., cancer).

The invention discloses a smelting method with added iron ore, comprising the following steps: (1) placing the iron ore in a crusher for crushing treatment, and then placing the iron ore in a ball mill for grinding to obtain ore powder; (2) preparing quartz sand and manganese monoxide into quartz sand fine powder and manganese monoxide fine powder respectively, and preparing coal powder into fine powder; (3) pouring the ore powder, quartz sand fine powder, manganese monoxide fine powder, coal powder fine powder and titanium dioxide into a mixer and stirring them evenly, and placing the stirred materials in a ball-making plate for ball-making; (4) placing the ball-shaped materials in a gas-based vertical furnace to obtain direct reduced iron; (5) placing the direct reduced iron in an electric furnace, and obtaining primary molten steel through heating, oxygen blowing and slag-making operations; (6) placing the primary molten steel in a refining furnace for refining; and (7) starting argon blowing at the bottom of the ladle while adding a slag-making agent and a deoxidizer in the refining furnace; the process flow is greatly simplified, the consumption of raw fuel, auxiliary materials, electricity and the like is reduced, emissions are reduced, and labor costs are reduced.

The utility model discloses a stock solution bottle connector for a foam sprinkling can, which relates to the technical field of connectors and comprises a first body for connecting the foam sprinkling can and a second body for connecting a stock solution bottle. The first body comprises a foam sprinkling can connecting body and a first magnetic attraction body; the second body comprises a bottle opening connecting body and a second magnetic attraction body. The foam sprinkling can connecting body and the bottle opening connecting body are detachably connected through the magnetic attraction force of the first magnetic attraction body and the second magnetic attraction body. According to the scheme, the stock solution bottle can be quickly and conveniently mounted on the foam sprinkling can body, and the cleaning operation efficiency is greatly improved.

The invention provides a method for detecting allura red in food by using difunctional sulfur nanodots. According to the invention, a fluorescence detection method for quantitative detection and identification of allura red (AR) is developed by utilizing dual functions of S-dots, and the S-dots are both a fluorescence indicator and a decomposition reagent of the AR. The fluorescence of the S-dots is quenched by AR, and the mechanism is a static quenching effect. In addition, due to the synergistic decomposition effect of S-dots and an etching reagent (H2O2 solution) on AR, quenched fluorescence is gradually recovered. According to the fluorescent response of S-dots to AR, AR as low as 5 nM can be quantitatively detected, and AR in food pigments can be distinguished by observing fluorescence recovery. Detection and identification of AR in actual food samples such as soda drinks, coated chocolates and fruity milk candies are realized. A new clue is provided for the design of a chemical sensor, and the method has great application potential in the aspect of guaranteeing food safety.

The invention belongs to the field of denitration, and particularly relates to a molecular sieve for selective catalytic reduction of nitrogen oxide and application of the molecular sieve. The molecular sieve for selective catalytic reduction of nitrogen oxide comprises one or a mixture of a beta-type pure-phase molecular sieve, a beta-type mixed-phase molecular sieve or a tungsten-containing Beta-type molecular sieve. The pure-phase Beta molecular sieve disclosed by the invention has excellent medium and low temperature methanol-SCR catalytic performance, and meanwhile, the yield of N2 is relatively high. The mixed-phase molecular sieve and the tungsten-containing Beta molecular sieve, which are prepared by a seed crystal auxiliary method and mainly comprise a Bata phase, have excellent methanol-SCR activity, have a wide temperature window and a high N2 yield, and can realize green synthesis of the Beta molecular sieve. The invention provides the alcohol-SCR denitration catalyst with high low-temperature activity, high N2 selectivity and wide temperature window, so that the problems of catalyst deactivation, flue blockage, equipment corrosion and the like caused by ammonium sulfate generation when sulfur-containing moving source tail gas and industrial waste gas are treated by an NH3-SCR denitration technology at present are solved.

The invention discloses rocuronium bromide impurity molecules with anticancer activity and a preparation method thereof, and the preparation method comprises the following steps: taking epiandrosterone I as a raw material, dissolving in a solvent I, adding a Dess Martin reagent, and reacting to obtain an intermediate II; dissolving the intermediate II in an acidic solvent II, adding bromine, and reacting to generate an intermediate III; dissolving the intermediate III in a solvent III, adding alkali and morpholine, and reacting to generate an intermediate IV; dissolving the intermediate IV in a solvent IV, adding triisobutyl potassium borohydride, and reacting at low temperature to generate a target product V. The preparation method comprises the following steps: by taking epiandrosterone as a raw material, oxidizing 3-site hydroxyl into carbonyl by using a Dess Martin reagent, brominating 2-site and 16-site by using bromine under an acidic condition, performing nucleophilic substitution with morpholine under an alkaline condition, and selectively reducing 3-site carbonyl into hydroxyl, thereby obtaining the target impurity with the molecular purity of more than 95%, and the quality and reliability of subsequent biological activity research and drug development are ensured.

The invention relates to the technical field of filtration aiding processes, and provides a nanocellulose and composite cellulase combined filtration aiding process which comprises the following steps: S100, respectively preparing nanocellulose and composite cellulase; s200, pretreating the to-be-filtered liquid, sequentially adding nano cellulose and compound cellulase, and then stirring to obtain the treated to-be-filtered liquid; and S300, sequentially carrying out filtering treatment on the treated to-be-filtered liquid. According to the nanocellulose and composite cellulase synergistic filtration aiding technology, through the synergistic effect of nanocellulose and composite cellulase, the filtration efficiency is improved, the enzyme preparation process is optimized, the stability of the filtration process and the purity of filtrate are improved, and the nanocellulose and composite cellulase synergistic filtration aiding technology is high in environmental friendliness, wide in application range and suitable for industrial production. The problems of low efficiency, high energy consumption, non-ideal filtering effect and the like in a traditional filtering method can be solved.

The invention provides a segmented copolymer containing an ionic side chain as well as a preparation method and application of the segmented copolymer. The preparation method comprises the following steps: (1) synthesizing methyl polyaryletherketone of which the end group is halogen; (2) synthesis of polyether sulfone ketone with hydroxyl as a terminal group; (3) synthesizing a block copolymer; (4) synthesizing a brominated block copolymer; (5) synthesizing a quaternized alkyl diamine ionic compound; and (6) mixing the brominated block copolymer, a quaternized alkyl diamine ionic compound and a first solvent, reacting, and performing post-treatment to obtain the block copolymer containing the ionic side chain. The side chain of the block copolymer containing the ion side chain obtained by the preparation method provided by the invention has two positive charges and one negative charge, and when the block copolymer containing the ion side chain is applied to an exchange membrane, the exchange membrane can have selectivity on monovalent cations, and the block copolymer containing the ion side chain is high in ion flux, selectivity and stability. In addition, the preparation method of the block copolymer containing the ionic side chain is simple.

The invention belongs to the technical field of communication security, and discloses an ESIM of an intelligent pos system and an SIM switching method, the switching method judges whether an ESIM card or an SIM card is used by reading specific partition content in Flash, and the switching method specifically comprises the following steps: step 1, ESIM enabling judgment; step 2, enabling and switching the ESIM; and step 3, restarting the terminal equipment. According to the invention, after the terminal equipment is started, the ESIM and the SIM are selected and switched through the ESIM switch in the Settings, the adaptability of the equipment and the convenience in use are improved, a user needs to use different operator services in different countries and regions under the globalization background, the switching method enables the user to easily adapt to different network environments, and the user experience is improved. According to the method, local communication service can be enjoyed without replacing the entity SIM card, and finally, the leakage of transaction information is prevented through an encryption technology, so that the security of the terminal equipment is improved.

The invention relates to the technical field of mineral sorting and processing, in particular to a sorting method and system for superfine mineral fine silt. The sorting method for the superfine mineral fine silt comprises the steps that the mineral fine silt is subjected to size mixing treatment and mineral surface modification treatment, and mineral modified slurry is obtained; carrying out mineralization, collection and separation on the mineral modified slurry to obtain rough concentrate pulp and tailings; the rough concentrate pulp is mineralized again, collected and separated to obtain concentrate and final tailings; defoaming and concentrating before the rough concentrate pulp is mineralized, collected and separated again to obtain concentrated rough concentrate pulp; and the concentrated rough concentrate pulp is mineralized again, collected and separated to obtain concentrate and final tailings. According to the method, a strategy of collapsing the three-phase mineralized foam of the superfine mineral particles and reconstructing floating is provided, so that the stability of the multi-stage mineralized foam of the fine silt mineral is improved, the particle size limit of effective separation and processing of the micro-fine mineral is widened, and effective recovery of valuable metals in the superfine mineral fine silt is realized.

The invention provides a front low-noise light amplification method and system for a coherent detection laser radar, and the system comprises a continuous laser receiving and transmitting module which is used for transmitting detection light and receiving an echo signal, and the echo signal serves as first signal light; the double-pump generation module is used for generating second signal light and idler frequency light having a relative phase relation with the second signal light, and the second signal light and the idler frequency light serve as first pump light and second pump light respectively; the phase sensitive light amplification module is used for performing phase sensitive light parametric amplification after the first signal light is combined with the first pump light and the second pump light; the phase locking module is used for locking the relative phase between the double-pump light and the first signal light in the phase sensitive light amplification module; and the coherent detection module is used for detecting the first signal light amplified by the phase-sensitive optical parameter and demodulating information in the target. Weak optical signals can be amplified in a high-gain mode, amplification of same-frequency background noise can be restrained, and the signal-to-noise ratio and coherent detection efficiency of echo signals can be improved.

The present invention discloses a phthalazinone compound and a pharmaceutical composition and application thereof. The compound has a structure as shown in formula (I), and further comprises isomers, prodrugs, stable isotope derivatives, pharmaceutically acceptable salts or mixtures thereof. The compound has a significant inhibitory effect on PRMT5 at the enzyme level, and the inhibitory activity is stronger in the presence of MTA, with an inhibition rate of more than 80% at the nanomolar concentration level. At the same time, the inhibitory activity on MTAP-deficient tumor cells is stronger than that of wild-type cells, and the compound has selectivity. The prepared drug can exert its efficacy at both the molecular level and the cellular level, and has a wide range of applications.

The present application relates to the field of organic matter cracking, and discloses a cracking furnace and an organic matter cracking method, the cracking furnace comprising: a furnace tube, the furnace tube comprising MoSi2; and an electrode connected to the outer wall of the furnace tube.The cracking furnace can generate a short-circuit current by using the electrode, so as to heat the fluid flowing into the furnace tube, and the depth of the fluid cracking reaction can be controlled by controlling the tube wall temperature of the cracking furnace tube by using the voltage and the current.

The present application relates to a kind of surface carbonation modified iron-doped nickel oxide preparation method and the method of decomposing ozone, the preparation method comprises the following steps: adding precipitant to the aqueous solution of nickel-containing iron precursor, hydrothermal reaction is carried out, precursor material nickel-iron layered double hydroxide is obtained, calcination, the aqueous solution of the obtained iron-doped nickel oxide and modifier is mixed uniformly, hydrothermal reaction is carried out;Wherein, the modifier is one or more of urea, ammonium carbonate, ammonium bicarbonate, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, lithium carbonate, lithium bicarbonate, sodium hydroxide, potassium hydroxide and lithium hydroxide.The preparation method of the present application is simple, does not need special condition, and the iron-doped nickel oxide catalyst modified by surface carbonation is rich in active site, and can show high and stable ozone decomposition efficiency in high humidity or extremely high humidity environment.

The invention discloses a preparation method and application of a Cu modified SAPO-34 composite material, relates to a preparation method of a catalyst for selective catalytic reduction of NO, and aims to solve the technical problems that active sites of an existing denitration molecular sieve catalyst Cu-SAPO-34 are easy to agglomerate, the low-temperature activity is poor, the hydrothermal stability is poor, and the water resistance and sulfur resistance are poor. The method comprises the following steps: weighing pseudo-boehmite, H3PO4, white carbon black, triethylamine, tetraethylenepentamine and a copper organic complex to prepare sol-gel; wherein the copper organic complex is copper acetylacetonate, copper glycinate or copper ethylenediamine dihydrate; and then the sol-gel is subjected to a hydrothermal reaction, an obtained precursor is calcined, and the Cu modified SAPO-34 composite material is obtained. The denitration conversion rate of the material at 150-430 DEG C can reach 90-100%, and the material has N2 selectivity, resists water vapor and sulfur dioxide, and can be used in the field of NH3-SCR denitration.

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of a chiral dihydroquinolone compound. The application utilizes N-heterocyclic carbene (NHC) as a catalyst, and generates the chiral dihydroquinolone through a nitrogen hetero-diene Diels-Alder reaction of a chloroaldehyde and an azo-ortho-benzoquinone precursor under the action of NHC and an alkaline reagent. The preparation method of the application does not need to use a transition metal as a catalyst, can perform a reaction under relatively mild conditions, and has the advantages of green environmental protection, low cost, wide substrate selectivity, mild reaction conditions and the like. In addition, by optimizing the reaction conditions of the preparation method, the product has high yield, high purity, unique cis selectivity and excellent enantioselectivity. The application provides a new route and new idea for the chiral dihydroquinolone compound, can play an important role in the fields of drug intermediates and the like, and has good application value and potential.

The utility model discloses a light simple externally-hung scaffold which comprises an operation platform, an unloading rope and a safety protection rope, one end of the operation platform is fixed to a concave bay window of a main body structure through a locking support and a limiting back shore supporting leg, and the other end of the operation platform serves as an overhanging end and extends to an operation area of another main body structure. A protective fence is arranged on the periphery of the operation platform; the bottom end of the unloading rope is fixed to a pull ring at the front end of the operation platform, the front end of the safety protection rope is fixed to an operator at the operation platform, and the rear end of the unloading rope and the rear end of the safety protection rope are fixed to pull rings of the other set of locking supports. And the locking support with the pull ring is fixed on an inner bridging piece of a bay window of a main body structure at the upper layer position of the operation platform through the limiting top supporting legs. The utility model has the advantages of simple and light structure and wide ingredient selectivity, can enter the working procedures of plastering, pipeline installation, waterproof construction and the like in the position of an air conditioner in advance during the construction of a main body structure, can eliminate the idling of installation workers during the construction of the main body structure, and has high construction speed.

The invention relates to the technical field of biosensors, in particular to a high-reliability biosensor based on a ReS2 / PVP nano composite material, a manufacturing process and application. The biosensor is prepared by taking an LCP (Liquid Crystal Polymer) copper interdigital electrode as a basic electrode and depositing a sensing layer on the basic electrode; the prepared biosensor has the advantages of being small in size, wearable, high in reliability, sensitive in reaction, simple in detection technology and low in production cost, has selectivity on adenosine triphosphate (ATP), has a wide application prospect, and particularly has a good application prospect when being applied to a tumor radiotherapy respiratory gating system. The real-time continuous respiration monitoring can be carried out.

This invention provides a molecularly imprinted polymer-chitosan composite microsphere, its preparation method, and its application, relating to the field of solid-phase extraction separation. The preparation method of the molecularly imprinted polymer-chitosan composite microsphere uses tris(2-chloropropyl) phosphate as a template molecule, acrylamide as a functional monomer, ethylene glycol dimethacrylate as a crosslinking agent, azobisisobutyronitrile as an initiator, and anhydrous methanol as a solvent. After prepolymerization, the system undergoes a deoxygenation reaction to prepare tris(2-chloropropyl) phosphate-molecularly imprinted polymer powder, which then reacts with chitosan to form molecularly imprinted polymer-chitosan hydrogel beads, yielding the composite microspheres. Using these composite microspheres as solid-phase extraction packing material can improve the selective enrichment of target analytes and increase the recovery rate of large-volume solid-phase extraction methods. Furthermore, this invention solves the problem of low recovery rates in seawater using current large-volume solid-phase extraction methods and simultaneously lowers the detection limit of analytical methods, improving detection capabilities.

The utility model belongs to the technical field of extrusion devices, and particularly relates to a battery extrusion device which comprises a test shell, a movable clamp is movably arranged on the left side of the inner bottom wall of the test shell, a static clamp is fixedly mounted on the right side of the inner bottom wall of the test shell, and baffle plates are arranged on the sides, close to each other, of the movable clamp and the static clamp. Four positioning strips distributed in an annular array are fixedly installed on the side faces of the baffle plates, and a battery to be tested is fixed between the two baffle plates. According to the utility model, a battery to be tested is arranged between the movable clamp and the static clamp, and the second electric telescopic rod drives the movable clamp to move towards the static clamp, so that the battery is positioned, namely, the end part of the battery is fixed among the four positioning strips on the baffle disc, and then the battery can be tested through the needling assembly; and the extrusion test of the battery can be directly realized through the second electric telescopic rod, that is, the two baffle plates extrude the battery to be tested, so that the extrusion test operation of the battery has selectivity and is used as required.