14results about How to "Prevent infestation" patented technology

The present invention relates to a mutant plasmid and a preparation method and application thereof, belonging to the field of plant virology and molecular biology. F R2‑2bPT‑PSTVd 1‑200 Contains CMV Fny The full-length RNA2 sequence of the isolate has TAATAG and PSTVd ​​fragment inserted between positions 2682 and 2683; the nucleotide sequence of the PSTVd ​​fragment is shown in SEQ ID NO.1. Fny Isolate RNA1 and modified PCB301‑RNA3‑ △ The apno plasmid and the mutant plasmid of the present invention are pre-mixed and inoculated. The attenuated vaccine can prevent the potato spindle tuber virus from causing harm and avoid the spread of the virus by aphids in the field. The effect is good and provides vaccine materials and effective measures for field control of PSTVd.

The present invention relates to the technical field of electronic connectors, and specifically to an electronic connector for an optical fiber communication product, comprising an electronic connector a and an electronic connector b connected to the electronic connector a, wherein the electronic connector b is provided with a connecting mechanism for assisting the precise connection with the electronic connector a during the connection process, and the connecting mechanism comprises a positioning plate a and a positioning plate b respectively connected to the electronic connector a and the electronic connector b. The purpose of the present invention is to provide an electronic connector for an optical fiber communication product, wherein the positioning plate a slides directionally on a guide plate, and the positioning rod slides inside a positioning tube to play a limiting role. With the cooperation of the two methods, the electronic connector a can be connected to the electronic connector b more accurately, thereby avoiding human misjudgment and deviation in the direction of force, which causes the connection ports of the electronic connector a and the electronic connector b to be unable to be precisely connected, thereby resulting in poor connection stability and poor versatility.

The utility model discloses a half-cavity loudspeaker module, which comprises a module shell, a loudspeaker monomer, sound absorption particles, a breathable separator and a sealing spacer, and is characterized in that the module shell is provided with an opening, a mounting position and a sound outlet hole; the loudspeaker single body is installed at the installation position, the loudspeaker single body divides the internal space of the module shell into a front cavity and a rear cavity, and the front cavity is communicated with the sound outlet hole; the sound-absorbing particles are filled in the rear cavity; the breathable separator is arranged at the opening to prevent the sound-absorbing particles from escaping from the rear cavity through the opening; the sealing spacer is detachably installed on the module shell and seals the opening, and the sealing spacer is located on the side, away from the sound absorption particles, of the breathable spacer. The half-cavity loudspeaker module is filled with the sound absorption particles, the virtual rear cavity is enlarged, the acoustic performance is improved, the sealing spacer can play a role in isolating the outside atmosphere from the rear cavity, and the stability of the performance of the half-cavity loudspeaker module is guaranteed. The whole rear cavity of the half-cavity loudspeaker module is basically filled with the sound-absorbing particles, so that the acoustic performance is greatly improved.

The invention discloses an elevator air purification and disinfection device and a purification and disinfection method, and relates to the field of elevator air purification, the elevator air purification and disinfection device comprises a shell and an exhaust frame, a cover plate is mounted at the top of the shell, an air feeder is mounted in the shell, and inner plates are elastically and symmetrically arranged in the cover plate; a second air hole and a first air hole are formed in the inner plate and the cover plate in a penetrating mode respectively, an inserting groove is formed in the bottom of the inner plate, an arc-shaped filtering plate is arranged in the shell, an inserting rod is arranged in an interlayer of the shell in a sliding mode, and an exhaust groove is formed in the outer wall of the exhaust frame. Inserting rods can slide out of the inserting grooves, dust and impurities in an elevator shaft are filtered for the first time and then filtered for the second time through an arc-shaped filtering plate, the contact area of introduced gas and an elevator car is enlarged through cooperation of an adjusting block and an arc-shaped winding rod, and the air feeder is in a closed state in the follow-up unmanned state; and the ultraviolet disinfection plate can disinfect the interior of the elevator car.

The invention belongs to the technical field of building surface repairing and reinforcing auxiliary equipment, and relates to a structure protection coiled material and a manufacturing method, the structure protection coiled material comprises a structure protection coiled material and a protection film, and the protection film is adhered to the surface of the structure protection coiled material; the structure protection coiled material comprises a polymer cement layer and a resin layer, the resin layer is laid on one side of the polymer cement layer, and the other side of the polymer cement layer is connected with a protection film through an adhesive. According to the invention, coating of the polymer cement layer and the resin layer is integrated, and the polymer cement layer can be easily compatible with an existing structure surface layer (such as concrete) needing to be maintained, so that the polymer cement layer is in tight fit with the existing structure surface layer, and tight fit between the coiled material and the structure is ensured for protection; even if the structure cracks or expands, the structure protection coiled material can follow the change of the surface layer of the structure.

The present application relates to the field of chitosan-modified additives, and specifically discloses a multifunctional additive for adhesives and a preparation method thereof, wherein the multifunctional additive for adhesives comprises the following raw materials in parts by weight: 10-20 parts of zinc-based chitosan slow-release particles, 5-13 parts of deodorants, 8-18 parts of antibacterial agents, and 40-70 parts of water; the zinc-based chitosan slow-release particles are prepared by the following steps: mixing aldehyde-modified cyclodextrin with chitosan glue, adding a catalyst, reacting to obtain cyclodextrin-grafted chitosan, and reacting with a soluble zinc salt to obtain zinc-based chitosan slow-release particles. The preparation method of the multifunctional additive for adhesives comprises the following steps: uniformly mixing zinc-based chitosan slow-release particles, deodorants, antibacterial agents, and water to obtain an additive. The obtained additive has excellent antibacterial, mildew-proof, and TVOC removal properties for use in adhesives, and its effectiveness is long-lasting, its ingredients are safe and environmentally friendly, and it has no toxic decomposition products and is non-irritating to the human body.

The utility model discloses an improved terminal block, which relates to the field of terminal blocks and comprises a shell, a plurality of groups of sockets are arranged on one side of the shell, the top of the shell penetrates into the shell and is rotatably provided with a bolt assembly, and guide columns are elastically and symmetrically arranged in the shell. One side of each guide column and the bottom end of the bolt assembly are arranged in an arc shape, one side of each guide column is connected with a U-shaped rod, and a pressing foot is installed at the other end of each U-shaped rod. According to the utility model, the bolt assembly extrudes the guide columns on the two sides in the downward sliding process, at the moment, a worker can insert a conductor through the socket and then reversely rotate the bolt assembly to enable the bolt assembly to slide upwards, and in the process, the guide columns are driven to reset and slide under the action of the reset spring, so that the inserted conductor is limited by the presser foot; in the process, the condition that the bolt assembly shakes after being used for a long time does not affect the limiting of the conductor.

A safe anti-interference switch cabinet disclosed by the present invention comprises a cabinet body and a heat dissipation protection structure, the cabinet body comprises an external first cabinet body and an internal second cabinet body, the side parts and the tops of the first cabinet body and the second cabinet body are separately arranged at intervals, the two sides of the first cabinet body are respectively provided with a plurality of groups of first heat dissipation ports, and the two sides of the second cabinet body are respectively provided with a plurality of groups of second heat dissipation ports. The two sides and the top of the second cabinet body are each provided with a plurality of sets of second heat dissipation openings, the heat dissipation protection structure comprises a linear module and a heat dissipation fan, the linear module is longitudinally fixed to the middle of the side edge in the second cabinet body, and the heat dissipation fan is longitudinally distributed and fixed to the driving end of the linear module and blows air towards the side portion. The device is simple, reasonable and reliable in structure, adopts an isolation type protection structure, can be conveniently disassembled and cleaned, effectively avoids dust infection, avoids interference to electrical elements, and improves the power utilization safety of the electrical elements through an internal fresh air circulation type heat dissipation structure.

The invention provides an anti-rheumatoid arthritis effect of xanthoceras sorbifolia 4-flavor decoction. According to the invention, a CCK-8 method is adopted to detect the inhibition rate of MH7A cells, flow cytometry is adopted to detect cell apoptosis, and an ELISA method is adopted to detect the expression levels of TNF-a, IL-6, RF, MMP-9, CRP and ASO in the MH7A cells. The xanthoceras sorbifolia-4-flavor decoction and the effective components thereof have a certain inhibition effect on proliferation of synovial fibroblasts MH7A of rheumatoid arthritis patients, and except for the xanthoceras sorbifolia-4-flavor decoction, the effective components of gallic acid, dihydromyricetin, ellagic acid, berberine and the like can cause apoptosis of the MH7A cells, so that the effect of inhibiting the proliferation of the synovial fibroblasts MH7A can be achieved. The expression levels of CRP, IL-6, ASO and RF factors indicate that the xanthoceras sorbifolia 4-flavor decoction is one of the mechanisms of the xanthoceras sorbifolia 4-flavor decoction for resisting the RA effect.

The application discloses a nerve tumor surgery postoperative rehabilitation nursing device, and relates to the technical field of nerve tumor surgery, which comprises a nursing helmet, and an air bag neck ring is arranged at the bottom of the nursing helmet. The nerve tumor surgery postoperative rehabilitation nursing device can continuously cool the top of the head of a patient, so that the wound site is kept in a dry state at all times, a good nursing and healing environment is provided for the rapid recovery of the wound site, the head of the patient is helped to dissipate heat in a large area, the feeling of stuffiness and discomfort of the head caused by long-time wearing of the nursing helmet is eliminated, the wound site is prevented from being excessively pressed, a child lock mode is provided, direct scratching of the wound site by the hands of children is effectively prevented, the normal recovery of the wound site is protected, wound healing is accelerated, scarring is prevented, automatic diffusion type medicine application wet nursing effect on the wound site of the head of the patient is realized, and slow medicine application on the wound site is realized.

This invention discloses an intelligent key cabinet, relating to the field of key cabinets. It includes a cabinet body, a top cover plate, a second rack on the inner side of the cover plate, a fixed gear within the cabinet's interlayer, a second transmission mechanism on one side of the fixed gear, and a bidirectional threaded rod connected to the other end of the second transmission mechanism. The outer wall of the bidirectional threaded rod has a support rod, and the other end of the support rod has a top plate. Inside the cabinet is a first rack, and at the bottom of the top plate is a worm gear, one end of which is connected to a shaped gear. This invention uses the second transmission mechanism to drive the bidirectional threaded rod to rotate, lifting the storage plates from inside the cabinet for easy access by prison staff. During the lifting of the top plate, the worm gear causes two sets of rotating storage plates on the top plate to rotate at a certain angle, presenting all the storage plates directly to prison management personnel.

The application discloses a mobile fruit picking and sorting equipment. A conveying mechanism frame and a grading mechanism frame are installed on the top surface of a grooved square tube frame; a picking and feeding mechanism is installed on the conveying mechanism frame and the grooved square tube frame and located at the front part of a walking mechanism; a bucket fruit cup overturning grading mechanism is horizontally installed on the grading mechanism frame and located at the rear part of the walking mechanism; a roller conveying and detecting mechanism is horizontally installed on the conveying mechanism frame and located at the middle part of the walking mechanism; the picking and feeding mechanism, the roller conveying and detecting mechanism and the bucket fruit cup overturning grading mechanism are sequentially arranged along the conveying direction of the fruit; and a vertical discharging mechanism is vertically installed on the side surface of the grading mechanism frame and located at one side of the bucket fruit cup overturning grading mechanism. The application is suitable for outdoor fruit picking scenes, can better meet the field picking and complete the preliminary grading task, can prevent early disease fruits from invading during storage and selling on the field, and has a good application prospect.

The utility model discloses a half-cavity loudspeaker module, which comprises a module shell, a loudspeaker monomer, sound absorption particles, a breathable separator and a sealing spacer, and is characterized in that the module shell is provided with an opening, a mounting position, a sound outlet hole and a filling cavity; the loudspeaker single body is installed at the installation position, the loudspeaker single body divides the internal space of the module shell into a front cavity and a rear cavity, the front cavity is communicated with the sound outlet hole, and the rear cavity is communicated with the filling cavity; the sound-absorbing particles are filled in the filling cavity; the breathable separator is arranged at the communication position of the filling cavity and the rear cavity to prevent the sound-absorbing particles from escaping out of the filling cavity; the sealing spacer is detachably installed on the module shell and seals the opening. The half-cavity loudspeaker module is novel in structure, the half-cavity loudspeaker module is filled with the sound-absorbing particles, the virtual rear cavity is enlarged, the acoustic performance is improved, and the sealing spacer can play a role in isolating the outside atmosphere and the filling cavity, so that the sound-absorbing particles are prevented from being infected by water vapor in the transportation and storage process, and the stability of the performance of the half-cavity loudspeaker module is guaranteed; and the loudspeaker monomer is convenient to maintain and replace.

The invention provides a portable refrigerator, and belongs to the technical field of refrigerators. Comprising a refrigerator body, the refrigerator body comprises a refrigerator body, an upper cover is rotationally connected to the refrigerator body through a hinge, a freezing chamber and a refrigerating chamber are arranged in the refrigerator body, LED lamps are installed in the freezing chamber and the refrigerating chamber, and a first partition plate is slidably connected between the two side walls of the freezing chamber through a sliding groove; a second partition plate is slidably connected between the two side walls of the refrigerating chamber through sliding grooves. By arranging the refrigerator body, the refrigerator is convenient to move, the application scene of the refrigerator is improved, by arranging the protection assembly, the corners and the bottom of the refrigerator body can be protected, collision and damage are avoided, meanwhile, the situation that an operator is injured due to collision during carrying is avoided, meanwhile, the sealing effect of the refrigerator body can be improved, and the service life of the refrigerator is prolonged. And by arranging the heat dissipation assembly, the heat dissipation effect of electronic elements in the refrigerator body can be improved, and meanwhile the electronic elements are prevented from being infected by dust.