43results about How to "Reduce attachment time" patented technology

Heart valve attachment apparatus and methods that significantly reduce attachment times are provided. The apparatus and methods utilize a connector band to form an interface between a uni-directional valve and a tissue annulus. The connector band is secured to the tissue annulus by retention fingers.

The present invention relates to a transfer jig for a bracket or a tube to perform an orthodontic operation to an actual tooth of a patient by an indirect attachment using an electronic mold, the transfer jig comprising a fixing unit which has a fixing base including a contact surface corresponding to the actual teeth; and a moving unit which has a first side coupled with the fixing unit and a second side detachably attached to at least one of the bracket and the tube. That is, the fixing unit is manufactured by a small/high precision CNC equipment installed in individual dental clinics. The moving unit is attached to a slot of the bracket or tube in the same direction as the coupling direction of the arch wire. The moving unit is rotatably coupled with the fixing unit.

A method is disclosed for a relay node (RN) attaching a network. The RN accesses a first cell. The RN obtains a list of cells that support a relay function and allow being accessed by the RN. When the first cell accessed by the RN is one of the cells in the list and a relay function of a mobility management device serving the RN is supported, not leaving, by the RN, the first cell.

The invention relates to a polycrystalline silicon chip texturing and cleaning method. The polycrystalline silicon chip texturing and cleaning method comprises the following steps that a polycrystalline silicon chip is arranged in mixed liquid of 2-10 DEG C to be immersed for 1-2min to perform texturing, and the mixed liquid is composed of nitric acid, hydrofluoric acid and glacial acetic acid; the polycrystalline silicon chip after texturing is cleaned by water, an inorganic alkali solution, mixed acid liquid and water in turn, wherein temperature of the inorganic alkali solution is 48-52 DEG C, and the mixed acid liquid is composed of hydrochloric acid and hydrofluoric acid; and the cleaned polycrystalline silicon chip is dried. According to the polycrystalline silicon chip texturing and cleaning method, reflectivity of the polycrystalline silicon chip can be reduced.

The invention relates to a method for improving the success rate of umbilical cord blood mesenchymal stem cell culture by using placental mesenchymal stem cells. The method comprises the following steps: firstly, digesting placentallobules in a short time by using collagenase I to obtain a paste mixture consisting of extracellular matrix protein and tissue blocks and carrying out primary culture; and then co-culturing third-generation placental mesenchymal stem cells as moisturizing cells and separated primary umbilical cord blood mesenchymal stem cells under a low-oxygen condition to obtain a lot of umbilical cord blood mesenchymal stem cells. The method for improving the success rate of umbilical cord blood mesenchymal stem cell culture by using placental mesenchymal stem cells provided by the invention shortens the culture time of the placental mesenchymal stem cells, effectively solves the problem that the placental mesenchymal stem cells are low in purity and poor in multiplication capacity and the like, improves the success rate of umbilical cord blood mesenchymal stem cell culture and develops the utilization value of the umbilical cord blood mesenchymal stem cells. As fetal calf serums and pancreatin are not used, the safety of the cells on clinical application is enhanced.

The invention provides a polaroid. The polaroid comprises a substrate and a polarizing film layer arranged on the substrate; the polarizing film layer comprises a plurality of unit polarizing film layers; the positions of the plurality of unit polarizing film layers on the substrate correspond to the positions of a plurality of display panels in a liquid crystal box; and the area of each unit polarizing film layer is less than or equal to that of the corresponding display panel. Correspondingly, the invention further provides a manufacturing method of the display panel by using the polaroid and a manufacturing method of the polaroid. The polaroid disclosed by the invention is applied to a liquid crystal box-forming technology, and the attaching number of times and the attaching time of the polaroid can be greatly reduced.

The invention discloses an attaching device and an attaching method; wherein, the attaching device comprises a platform used for arranging a substrate, an attaching mechanism used for attaching anisotropic conductive materials on the substrate, a long press and a short press used for exerting external forces on the substrate which is used for attaching the anisotropic conductive materials; the attaching method comprises the steps as follows: the substrate is arranged on the platform; the attaching mechanism is moved so as to attach the anisotropic conductive material to the substrate; the long press and the short press are used to exert the external force on the substrate which is used for attaching the anisotropic conductive material on the substrate. The attaching device and the attaching method provide wider elastic space when the anisotropic conductive material is attached to the substrate, and effectively reduce the attaching time compared with the traditional long-attaching device and the short-attaching device; furthermore, the attaching device combines the functions of the traditional long-attaching and short-attaching devices, and can improve the requirement of diversified attachment of anisotropic material on the substrate.

The invention relates to the fields of stem cells and tissue engineering, in particular to a method for extracting mesenchymal stem cells from the human umbilical cord. To solve the problems and defects in the conventional separation and culturing technology for human umbilical cord mesenchymal stem cells, the method adopts the technical scheme that the separation method for the human umbilical cord mesenchymal stem cells comprises the following steps: 1. preparation of an umbilical cord tissue block; 2. digestion of the tissue block; 3. filtration of a digestion solution, and centrifugal cell collection; 4. combination of cell sediments, centrifugation, and cell collection; 5. subculturing; 6. cell cryopreservation through a programmable cooler, and cryopreservation in liquid nitrogen. The method provided by the invention can lower the cost, achieve rapid obtaining of the mesenchymal stem cells, reduce cell damages, prolong the cryopreservation period, improve the cell activity, shorten the operational process, reduce pollution, and improve the cell purity.

The invention belongs to the field of cell culture, and in particular relates to a culture medium for skin keratinocyte and a culture method thereof. The culture medium for the skin keratinocyte provided by the invention comprises a DMEM (Dulbecco Modified Eagle Medium) basic culture medium, an epidermal growth factor, a transforming growth factor, vitamin H, recombinant human insulin, transferrin, hesperidin and resveratrol. By adopting the culture medium for the skin keratinocyte provided by the invention, the cell attachment time of the keratinocyte can be shortened, differentiation of the keratinocyte is prevented, and the pollution of keratinocyte caused by fibroblasts is lowered; meanwhile, by adopting the culture medium for the skin keratinocyte, the proliferation rate of the keratinocyte can be increased, and the vitality and cell characteristics of the keratinocyte in a passage process are maintained; the culture medium is a relatively ideal in-vitro culture medium for the skin keratinocyte.

The invention discloses a diffusion pump, and particularly relates to a large-caliber high vacuum oil diffusion pump, which is suitable for a vacuum furnace and a vacuum coating machine. The large-caliber high vacuum oil diffusion pump comprises a pump body, and a pump core component arranged in the pump body, wherein a heater is arranged at the bottom of the pump body; an oil stop device is arranged in an exhaust port of the pump body; the pump body adopts a convex cavity structure; the pump core component is vertically mounted in a center oil tank in the pump body, and is formed into an integral structure by a first-stage guide pipe, a second-stage guide pipe and a third-stage guide pipe arranged in sequence from inside to outside; umbrella cap-shaped diffusion nozzles are respectively arranged at the upper parts of all the guide pipes; a spraying nozzle is vertically welded at the bottom of the third-stage guide pipe; the first-stage guide pipe is higher than the second-stage guide pipe; and the second-stage guide pipe is higher than the third-stage guide pipe. The large-caliber high vacuum oil diffusion pump has the characteristics of large caliber, high limit vacuum degree, high pumping rate, low oil return rate and low electricity consumption.

The invention provides a separation and culture method of renal podocyte of a mouse. The separation and culture method comprises the following steps of (a), intraperitoneally injecting 2% pentobarbital sodium to execute the mouse, sterilizing the mouse with alcohol, taking out kidney tissue of the mouse, putting the kidney tissue into a precooled sterile PBS (Phosphate Buffer solution) containing double antibodies, soaking and washing the kidney tissue, and peeling and removing a renal capsule; (b), mechanically dissociating the kidney tissue, then digesting the kidney tissue by a preheated mixed enzyme solution, and terminating digestion by a mixed complete culture solution; (c), obtaining the renal podocyte by adopting a difference sieving method, inoculating the podocyte in a treated cell bottle, and culturing the podocyte; (d), digesting a cell, which is cultured for 3d, through pancreatin, then filtering the cell once again by a sieve mesh, centrifuging filtrate to remove supernatant fluid, and resuspending and inoculating an obtained mixture in the treated cell culture flask; (e), identifying the renal podocyte by cell immunofluorescence. The separation and culture method of the renal podocyte of the mouse, which is provided by the invention, is good in repeatability, and is simple and convenient to operate; moreover, the high-yield and high-purity renal podocyte of the mouse can be obtained.

The invention provides a micro-needle transdermal drug delivery biological facial mask. The micro-needle transdermal drug delivery biological facial mask comprises a facial mask base and a micro-needle array which is arranged on the facial mask base; the micro-needle array is formed by distributing multiple micro-needle bodies according to a preset interval; each micro-needle body comprises a hollow-type solid micro-needle, a hollow drug delivery pipeline arranged inside the hollow-type solid micro-needle and a drug delivery cavity in the hollow drug delivery pipeline. By means of the micro-needle transdermal drug delivery biological facial mask, a drug transmission channel is formed through the hollow drug delivery pipelines, when the facial mask is entirely applied to the face, drugs, cosmetics and other effective components can permeate the cuticle to be efficiently transferred to different parts of the face based on the transmission channel, thus the purpose of locally absorbing the effective components quickly is achieved, the transferring and permeating efficiency of the drugs on the facial mask in the using process is greatly improved, the application time of the micro-needle facial mask is shortened, and convenience is provided for a facial mask user.

The invention discloses an adhesive residue detergent of an adhesive sticker and a production process of the adhesive residue detergent, and aims to provide the detergent which is environment-friendly, good in formula and simple in production process and can effectively eliminate adhesive residues of the adhesive sticker on various apparatuses as well as the production process of the detergent. The residual adhesive residue detergent of the adhesive sticker is technically characterized by being prepared from the following components in percentage by mass: 0.001-0.1% of gummy substance control enzyme, 50-90% of deionized water, 5-40% of sulphobetaine surfactant, 0.5-20% of cocamidopropyl dimethylamine oxide, 0.1-0.5% of preservative and 0.1-1% of essence, totaling 100%. The invention belongs to the technical field of detergents.

The invention provides a soft board photosensitive film attaching method. The soft board photosensitive film attaching method comprises the steps that a plurality of soft substrates are provided; the soft substrates are conveyed to a film pressing windlass device one by one; photosensitive films are attached to the surfaces of the soft substrates through the film pressing windlass device, and the soft substrates are connected into a whole through the photosensitive films; the soft substrates connected together through the photosensitive films are rolled to form a rolled substrate. By means of the soft board photosensitive film attaching method, the photosensitive film attaching efficiency of a soft circuit board can be improved.

The invention relates to a high vacuum oil diffusion pump, in particular to an electromagnetic heating high vacuum oil diffusion pump. According to the electromagnetic heating high vacuum oil diffusion pump, an electromagnetic heater is arranged on the bottom of a pump body; a water-cooling oil blocking device is arranged on the exhaust port of the pump body; a straight cavity structure is adopted by the pump body; a water channel type cooling jacket is arranged outside the pump body; a pump core assembly is vertically mounted at the center position inside the pump body; the pump core assembly structurally comprises an umbrella-shaped first-stage nozzle cap, an umbrella-shaped second-stage nozzle cap, a umbrella-shaped third-stage nozzle cap and a third-stage flow guide pipe from inside to outside in sequence to form a whole structure; flow guide pipes are respectively arranged on all umbrella-shaped nozzle caps; a first-stage diffusion flow guide pipe is vertically welded at the internal center position of the third-stage flow guide pipe; the first-stage flow guide pipe is higher than a second-stage flow guide pipe; and the second-stage flow guide pipe is higher than the third-stage flow guide pipe. The electromagnetic heating high vacuum oil diffusion pump has the characteristics that the heating speed is rapid; the cooling speed is rapid; the effect is good; the oil return rate is low; the ultimate vacuum is high; the exhausting rate is high; the electricity consumption is low; and the time to reach ultimate vacuum is short.

The invention discloses a graphite flake pasting jig. The graphite flake pasting jig comprises a mounting plate. Holes A are formed in the circumference of the top of the mounting plate at equal intervals. Finger grooves are formed in the front face and back face of the middle of the top of the mounting plate. A ventilation opening is formed in the middle of the top of the mounting plate. A pasting plate is arranged at the top of the ventilation opening. Air exhausting holes are formed in the left side of the top of the pasting plate at equal intervals. Holes B are formed in the front face andthe back face of two sides of the top of the pasting plate. Limiting columns are connected with inner cavities of the holes B in a penetrating mode. The invention relates to the technical field of graphite flake heat dissipation. The problem about pasting of the traditional technical method is solved. According to the graphite flake pasting jig, through cooperation of the air exhausting holes anda vacuumizing machine in the equipment, negative pressure is generated in local area by the pasting jig to attach a graphite flake, positioning accuracy is effectively improved, the traditional pasting procedures are replaced, the graphite flake pasting time is shortened, and the working efficiency is greatly improved.

The invention belongs to the field of chemical engineering, and discloses a method for synthesizing an acetone condensation compound from acetone and hydrogen. The method comprises the following steps: mixing acetone and hydrogen, introducing into a supergravity rotating bed, contacting a catalyst bed layer arranged on the rotor of the supergravity rotating bed, and reacting to obtain a liquid-phase component containing the acetone condensation compound and a gas-phase component, wherein the residence time tau of the liquid-phase component in the catalyst bed layer is less than or equal to 20s. According to the invention, the supergravity rotating bed reactor is introduced into the reaction for one-step synthesis of the acetone condensation compound from acetone and hydrogen, so that theretention time of the liquid-state product in the catalyst bed layer is remarkably shortened, the phenomenon of carbon deposition and coking in the catalyst along with the prolonging of the reaction time is relieved/eliminated, the service life of the catalyst is prolonged, and the conversion rate of reactants and the selectivity of the product are changed.

The invention provides a super wear-resistant and low-temperature-resistant glassy hydrophobic coating, a preparation method of the coating and the coating. The preparation method of the coating comprises the following steps: step 1, taking methylacryloyloxysilane and hydroxyethyl methylacrylate as raw materials, and reacting in the presence of an initiator and a diluent to generate a modified prepolymer; and 2, dissolving the prepared modified prepolymer in a diluent, then mixing with PDES-ran-PTFPMS fluorine-containing cosiloxane, an isocyanate curing agent and an ultraviolet absorbent, preparing the super wear-resistant and low-temperature-resistant glassy hydrophobic coating by adopting a solution polycondensation method, coating the surface of an object with the coating, and curing to form a film to form a coating, thereby obtaining the super wear-resistant and low-temperature-resistant glassy hydrophobic coating. The coating prepared by the invention has the characteristics of super wear resistance, low temperature resistance and hydrophobicity, the wear of the coating under severe conditions can be improved, the low-temperature environment resistance is improved, the adhesion time of an adhered corrosive medium or impurities capable of causing the coating to be scratched and damaged is shortened, and the comprehensive protection effect and the service life of the coating are prolonged.