30results about How to "Good price advantage" patented technology

The invention is a stainless steel double-tanked (three-tanked) water tank stretching technique, including the working procedures such as batching, shearing angle, first stretching, shearing side, washing, annealing, second stretching, cutting side, punching hole, surface processing, etc. The water tank made by the working procedures forms a through structure without welding, reducing production cost and avoiding the problems of water leakage and of affecting fastness, thus heightening the whole quality and service life of the water tank.

The invention provides a method of detection of transcription factor expression activity by a luciferase reporter gene system; the method comprises the steps: based on the luciferase characteristics of being lasting, stable and easy to detect, co-transfecting cells with a luciferase reporter gene vector containing a target gene promoter and a transcription factor expression plasmid; after the cells are cultured, carrying out lysis of a certain number of cells with a cell lysis buffer liquid, collecting a lysate containing luciferase, and centrifuging to take a supernatant; and then real-timely detecting luciferase expression intensity data in a luciferase activity detection buffer liquid, at the same time, detecting the luciferase concentration, correcting, and then calculating to obtain the transcription factor expression quantity, namely the transcription factor expression activity needing to detection. The method is simpler and more feasible in whole operation process, shorter in time consuming, higher in flux, relatively high in repeatability and accuracy, and lower in operating costs, thereby having broad application prospects, and having excellent market potential.

The dynamic oral cavity biomembrane model device includes an alkali liquor tank, a culture medium tank, a fermenting tank, a constant flow culture chamber and a sample applying bottle. It features the constant flow culture chamber comprising several serially connected vertical standard cylindrical constant flow culture chambers, the alkali liquor tank connected through peristaltic pump P1 to the fermenting tank, the culture medium tank connected peristaltic pump P2 to the fermenting tank, the fermenting tank with N2 and CO2 introduction through filter F2 and peristaltic pump P4 and waste liquid and waste gas exhaust through peristaltic pump P5 and filter F1, the constant flow culture chamber connected through peristaltic pump P6 to the fermenting tank and with waste liquid and waste gas exhaust through peristaltic pump P7 and filter F3, and the culture medium tank and the sample applying bottle connected through peristaltic pumps P2 and P3 to the constant flow culture chamber.

The invention provides a method for preparing modified starch by oxidation and succinic anhydride esterification. The method comprises the following steps of: dissolving starch into water to form starch milk, performing oxidation reaction on sodium hypochlorite oxidant and starch to obtain oxidized starch, then removing chlorine, performing esterification reaction by adopting succinic anhydride, and finally dehydrating and drying the reaction product to obtain the modified starch. When the modified starch prepared by the method is used as starch size, the modified starch has the properties of good fluidity, low viscosity and high-concentration use of the oxidized starch; and because the succinic anhydride esterification solves the problem of poor thermal stability of the oxidized starch, the modified starch has the advantages that: adhesion of warps is remarkably improved; a size film has strong forming capability, good mechanical strength and extensibility; the paste has stable viscosity and good fluidity; the size has certain moisture absorption property; the modified starch has good co-solvency with a synthetic size; the film is easy to dissolve in water, and de-sizing is easy; and the paste has high thermal stability, is not affected by high-temperature melting and the like.

The invention discloses a gluing device for corrugated carton production. The gluing device comprises a mounting frame, a connecting frame, a gluing mechanism, a leveling mechanism and a conveying mechanism, wherein the mounting frame is rectangular; the connecting frame is fixedly connected to the surface of the middle position of the mounting frame; the connecting frame is reversely U-shaped; the left end of the mounting frame is connected with the leveling mechanism; the right side of the mounting frame is connected with the conveying mechanism; the gluing mechanism comprises a glue box, slide rods, a connecting plate and a glue pump; two sides of the glue box are slidingly connected into slide holes formed in the middle position of the connecting frame through the slide rods; a glue outlet hole is formed in the lower end of the glue box; the glue pump is fixedly connected to the upper surface of the connecting frame through the connecting plate; and an output end of the glue pump communicates with a liquid inlet of the glue box through a hose. The gluing device for corrugated carton production is low in failure rate, low in manufacturing cost, excellent in stability, high in production efficiency, low in maintenance cost and excellent in use effect.

The invention relates to a method for preparing a protective material for rubber by recycling textile white mud. The preparation method is characterized by comprising the steps: 1) dissolving the textile white mud in sodium hydroxide, filtering with activated carbon after complete dissolution to obtain a sodium terephthalate clarified solution, adding a pre-prepared calcium chloride solution intothe clarified solution, filtering, washing and drying to obtain a calcium terephthalate organic framework material; 2) respectively dissolving the organic framework material obtained in the 1) and ananti-aging agent 4020 in dimethylformamide to obtain respective solutions; 3) mixing the solutions obtained in the 2), and carrying out a reaction under certain conditions under the action of a catalyst and an oxidant to obtain a coordination chelate; and 4) finally cooling to a proper temperature, and crushing to obtain the target product. The obtained product has the advantages of obvious priceadvantage, low possibility of caking, and capability of providing full-life-cycle protection for rubber products and preventing the products from becoming red.

The invention discloses a marine frequency conversion cabinet with high stability. The marine frequency conversion cabinet comprises an outer box body, a sliding rail, an inner box body, a sliding strip, a buffer unit, a hollow heat conduction partition plate and a circulation unit; the appearance of the outer box body is in a cuboid shape. The front side of the outer box body is arranged to be inan opening shape, and two sides of the middle position of the upper surface of the lower plate of the outer box body and the middle position of the upper plate are each fixedly connected with a sliding rail. The inner box body is in a box shape with an opening in the front side. A sliding strip is fixedly connected to each of the upper surface, corresponding to the sliding rail, of the inner boxbody and the lower surface of the lower plate; the sliding strips are connected with the corresponding sliding rails in a sliding manner; the inner wall of the inner box body is fixedly connected withthe hollow heat conduction partition plate at equal intervals. According to the invention, the frequency conversion cabinet has the advantages that the cabinet is good in damping effect, high in heatdissipation efficiency and good in moisture resistance, can be applicable to high-shaking places such as ships, meets heat dissipation requirements of high-power frequency converters and is not easyto damage, and heat dissipation requirements of the high-power frequency converters can be met.

The invention relates to the technical field of dye-sensitized solar cell materials, in particular to an indolethiodiene-type metal complex and a preparation method thereof; the invention uses isatin as a starting raw material, through chemical modification, in the nitrogen atom Various substituents R are introduced to obtain chemically modified isatin intermediates, and then further react with phosphorus pentasulfide and divalent metal chlorides to obtain indolethiodiene metal complexes. The invention breaks through the bondage of the benzene ring or naphthalene ring group used in the existing structure to form an intermediate thiodiene metal skeleton, and obtains a series of near-infrared dyes with a substituted indole thiodiene metal complex structure. Utilizing the characteristic of diketone structure in the molecular structure of isatin, a dye intermediate, after adding various modifications to the nitrogen atom, it can be directly complexed with the metal to obtain the target compound, which not only avoids the process steps of "three wastes" , and at the same time developed a new application for isatin dye intermediate.

The invention discloses a liquid crystal screen with good weather resistance. The liquid crystal screen comprises a mounting frame, connecting blocks, connecting holes and a heat dissipation unit. The mounting frame is arranged in a square frame shape, the rear ends of a left side plate and a right side plate of the mounting frame are arranged in a through shape, the edge positions of the upper surface and the lower surface of the mounting frame are each fixedly connected with a connecting block, the connecting blocks are arranged in a long-strip shape, and connecting holes are formed in the middle positions of the two connecting blocks at equal intervals in a through mode; and the heat dissipation unit comprises a vertical heat conduction plate, a heat dissipation wind blocking piece, a rear connecting plate, a heat dissipation fan and a display screen, the vertical heat conduction plate is fixedly connected to the inner wall of the middle position of the mounting frame, and the vertical heat conduction plate divides the mounting frame into a left space and a right space. The liquid crystal screen with the good weather resistance is simple in structure, the good heat dissipation effect on the LED liquid crystal screen can be achieved, a firm installation position can be provided for the liquid crystal screen, and the sealing effect and the protection effect are good.

The invention relates to an aromatic polyoxadiazole film and a preparation method thereof. The preparation method comprises the following steps: taking an aromatic dicarboxylic acid compound and a hydrazine salt as monomers, and carrying out condensation polymerization in fuming sulfuric acid to obtain an aromatic polyoxadiazole solution; extruding the aromatic polyoxadiazole solution through a clothes rack type casting mold, and then conveying the extruded aromatic polyoxadiazole solution into a dilute sulfuric acid coagulating bath for solidification molding to obtain a solidified acid-containing wet-state primary casting film; washing the acid-containing wet-state primary casting film to obtain a primary casting film free of sulfuric acid; and tensioning and drying the primary casting film free of sulfuric acid, carrying out heat setting treatment at 200-350 DEG C, and carrying out trimming and winding to obtain the aromatic polyoxadiazole film. The aromatic polyoxadiazole film canbe widely used as a high-temperature-resistant electric insulation film, a high-temperature-resistant insulation paper/film composite material, a copper-clad film, a high-temperature-resistant permeable film, a carbon film substrate, an aerospace material and the like.

The invention discloses a security radar system, which comprises a single-line laser radar and a translation module; wherein the single-line laser radar comprises a controller which is controlled by the controller to realize single-beam light two-dimensional scanning, and the translation module is controlled by the controller of the single-line laser radar to realize linear translation of a platform end; the single-line laser radar is fixed at the platform end; the controller cooperatively controls the single-line laser radar and the translation module, so that a scanning signal of the single-line laser radar in a third dimension is synchronous with a two-dimensional scanning signal of the single-line laser radar. According to the security and protection radar system, the three-dimensionalscanning effect can be achieved through the single-line laser radar; compared with a multi-line laser radar, the security and protection radar system has the advantages of being good in price advantage, low in cost and capable of guaranteeing high precision, and the technical problem that high-precision three-dimensional environment perception and organism recognition cannot be achieved in the security and protection field is solved.