21results 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 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.

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 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 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 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 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 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.

The present invention discloses a bimetallic sulfate composite catalyst and a preparation method and application thereof. The composite catalyst is BaSO 4 The bimetallic sulfate composite catalyst is prepared by a coprecipitation method using a sulfate of any one of Pb, Ag, Y, Sr, Ca, and Ni as a main catalyst and a sulfate of any one of the metals as a cocatalyst. The bimetallic sulfate composite catalyst of the present invention is applied to the reaction of preparing fluorinated olefins (HFOs) by gas phase dehydrochlorination of chlorofluoroalkanes (HCFCs). The bimetallic sulfate composite catalyst exhibits extremely high selectivity and stability, with a catalytic selectivity of more than 90% and a catalytic conversion rate of more than 80%. The catalyst of the present invention has the advantages of low reaction temperature, high conversion rate, high selectivity, good stability, low cost, etc.

This invention discloses a method for modifying lipid vesicles with an amphiphilic polymer containing N-oxide teramine groups. The amphiphilic polymer is OPDEA-PCL. OPDEA-PCL is used to modify synthetic liposomes, yielding amphiphilic polymer-synthetic liposome nanoparticles. OPDEA-PCL is also used to modify natural exosomes, yielding amphiphilic polymer-exosome nanoparticles. The amphiphilic polymer-synthetic liposomes of this invention possess active liver and lung targeting functions. This invention, through the engineered modification of exosomes with OPDEA-PCL, accurately guides exosomes to the liver regions requiring treatment, thereby enhancing the repair effect of exosomes on liver ischemia-reperfusion injury.

The utility model belongs to the field of superhard composite materials, and particularly relates to a polycrystalline diamond compact with a special-shaped structure. A non-circular convex frame is arranged at the top of the polycrystalline diamond layer, the non-circular convex frame is provided with at least two corners, and each corner extends towards the periphery of the polycrystalline diamond layer to form a convex strip; the outer edge of the polycrystalline diamond layer between the adjacent convex strips is concave downwards, so that an inclined concave surface is formed between the outer edge of the polycrystalline diamond layer and the non-circular convex frame; cutting surfaces are arranged at the connecting parts of the raised lines and the side cylindrical surface of the polycrystalline diamond layer; the cutting face comprises an upper cutting face and side cutting faces, the upper cutting face is located on the upper surface of the protruding strip, the side cutting faces are located on the two sides of the protruding strip, and the upper cutting face corresponds to the side cutting faces; through a 4D acting part of a multi-surface structure, excellent impact resistance and lithology breaking property are achieved, through optimization of geometrical shapes, cutting pressure is concentrated in a specific area, the cutting efficiency is improved, and the service life of the composite sheet is prolonged.

This invention is entitled "A Method for Recycling High-Magnetic Lithium Iron Phosphate," belonging to the field of lithium-ion battery cathode material technology. The technical problem to be solved is to provide a method for recycling substandard high-magnetic lithium iron phosphate with a magnetic content of 1-300 ppm. This method is environmentally friendly, simple, and can be mass-produced, and the recycled product meets battery performance requirements. The key technical points include the following steps: (1) First, high-magnetic lithium iron phosphate is ground and reacted with phosphoric acid, then lithium source, iron source, phosphorus source, and additives are added sequentially for mixing, grinding, spray drying, and sintering under an inert atmosphere to obtain a lithium iron phosphate precursor; (2) The lithium iron phosphate precursor, carbon source, and additives are mixed for secondary grinding, spray drying, sintering under an inert atmosphere, and graded crushing to obtain recycled lithium iron phosphate. The recycled lithium iron phosphate has a magnetic content of <1 ppm and exhibits high compaction density and electrochemical performance.

This invention relates to a method for extracting metals from metal ores, the method comprising the steps of: (i) leaching the ore to provide a metal salt, (ii) forming a eutectic system containing the metal salt, and (iii) recovering the metal from the eutectic system by electrolytic deposition, preferably electrodeposition. The method of this invention is particularly applicable to iron ores, especially for separating iron from hematite ore; however, the invention can be used to extract multiple metals from various other metal ores.

The invention provides a bay window balcony component with an air conditioner mounting position and a using method, and belongs to the technical field of balcony building components. Comprising a main body bottom plate and a bay window table plate, an extending frame is arranged in the main body bottom plate, and a lower wall body, a pipeline decorating plate and a wire passing pipe are installed on the main body bottom plate through the extending frame. By arranging the tie bars on the two sides of the bay window board, the stress effect of the upper portion of the bay window board is improved, integrated supporting of the two sides is improved, the vertical bars and the bay window board are connected through the embedded parts, the sinking and dislocation conditions of the upper wall body are reduced, the lower wall body decoration column, the decoration board, the lower decoration wall and the upper decoration wall are cut off, and the decoration effect of the bay window board is improved. The large-power air conditioner outdoor unit can be installed by taking down the supporting frame, after installation, the outer window groove position can be replaced with a blind window, the decoration strip of the inner window groove position is taken down, a new inner window is installed, after installation is completed, the supporting frame is installed, the supporting frame becomes a windowsill of the inner window, and the indoor attractiveness of a resident is not affected.

This utility model discloses a safety attachment point and protective device, including a supporting shell. A suction cup structure is provided below the supporting shell, and the suction cup structure and the adsorption surface form a suction cup chamber. A rotatable hanging arm is provided above the supporting shell. A cavity is provided inside the supporting shell, and the cavity is connected to the suction cup chamber. The cavity is connected to an air suction device to draw air from the suction cup chamber to create negative pressure. A buckle for suspending a safety belt is provided on the hanging arm. It can move with the worker's working range, and the working area is not restricted. Two or more attachment points can be used to form a protective device to provide fall protection over a larger area.