85results about How to "Easy to break into" patented technology

The invention relates to a preparation method of an oral biofilm. The preparation method comprises the following steps: adding type I collagen protein into an acetic acid solution to prepare a collagen-acetic acid swelling solution; adding chondroitin sulfate and stirring to prepare a collagen-chondroitin sulfate serous fluid; carrying out vacuum freeze-drying; pressing to prepare a collagen composite film; spraying the collagen-chondroitin sulfate serous fluid between two layers of the collagen composite film, and carrying out vacuum freeze-drying; carrying out high temperature vacuum crosslinking; and sterilizing after crosslinking to obtain a collagen-chondroitin sulfate composite oral biofilm. The invention has the following beneficial effects: the oral biofilm prepared by the above method has good histocompatibility, suitable controllable degradability and absorbability, low antigenicity and good plasticity and mechanical property; the oral biofilm is used in oral operation; and the three-dimensional porous structure of the oral film provides a tissue engineering scaffold for repairing of wounded tissues, is beneficial to invasion of cells and differential growth and can induce reparative regeneration of defective tissues, and specific thickness of the biofilm can effectively prevent ingrowth of soft tissue.

The invention relates to the structure, charge and production process of a non-priming charge detonator. The invented non-priming charge detonator includes two types of instant detonators, electric igniter tip and non-electric plastic nonel, and a millisecond delay detonator with a lead core delay body. It stimulates the combustion of gunpowder in the steel pipe to generate high-pressure gas, which acts on the high explosive to make it burn in the steel pipe and develop into a high-speed detonation at the bottom of the steel pipe, thereby making a non-priming detonator. The design is optimized for reliable operation and simple fabrication.

The invention discloses an entire orthoptera insect serial section pretreatment method, comprising the following steps: 1, freezing the orthoptera insect, fixing the insect in Bouin's fixative, removing feet, puncturing, and then placing the insect in the Bouin's fixative, and fixing the insect through negative pressure pumping; 2, carrying out gradient dehydration treatment under the conditions of negative pressure pumping; 3, carrying out transparency treatment under the conditions of negative pressure pumping; and 4, carrying out paraffin infiltration treatment with paraffin. The pretreatment method carries out negative pressure pumping in the fixation, dehydration and paraffin invasion processes, and can improve the treatment efficiency and enables the processes to be more thorough; the method optimizes the paraffin invasion time and enables the paraffin to be invaded in to each part of the orthoptera insect body, and also eliminates the complicated step of specially softening the tegument of the insect. The method can be used to obtain complete serial sections and has good effect and high repeatability, which is suitable for entire orthoptera insect serial sections.

The invention provides a method for extracting levodopa from cat beans. The method comprises the following steps: flattening the cat beans and putting the cat beans into a reaction kettle with a water solution containing dissolved ammonium hydrogen carbonate, ammonium sulfate, tannic acid and sodium pyrosulfite; pressurizing with carbon dioxide; raising the temperature and extracting to obtain an extracting solution and cat bean dreg; precipitating the extracting solution by utilizing chitosan and filtering; after primarily separating impurities, decompressing and concentrating filtrate; separating out a crude product; eluting the crude product with an ethanol solution; recycling eluted ethanol and taking a filter cake; purifying the filter cake by adopting a traditional refining process; standing and separating out crystals; filtering to obtain the crystals; drying the crystals to obtain the levodopa with the content of no less than 99 percent and the yield of no less than 3 percent. Compared with a traditional acid water-resin process, a product of the extracting method provided by the invention is equivalent and the yield of the product can be improved to 3 percent from previous 2.5 percent; the emission amount of wastewater containing acid and alkali is reduced by 95 percent or more, and 60 percent of labor force can also be saved.

The invention discloses a manufacturing method for composite metal, and a composite metal structure. The composite metal structure comprises a first metallic body and a second metallic body, wherein the first metallic body has a surface, and a plurality of convex bodies and a plurality of concave bodies are formed in the surface; the plurality of concave bodies are located among the convex bodies; each of the convex bodies are separately provided with a recessed groove which has a root width and a top width, and the root width is greater than the top width; the hardness of the second metallic body is less than the hardness of the first metallic body; and the second metallic body is in compression joint with the surface of the first metallic body and is embedded into the convex bodies, the concave bodies and the recessed grooves. Thus, the bonding firmness of the two metallic bodies is improved, a process is simplified and manufacturing time is shortened.

The present invention provides a transplanter which is provided with a planting tool (28) that receives transplanting object from a feeding part that is supported on a driving body and moves to a lower farmland surface for planting. The transplanter is provided with the following components: a pit digging member (110) which forms pits at the periphery of the planting according to driving of the body, and an interlocking lifting mechanism which causes the pit digging member (110) to be interlocked with the planting tool (28) and lifts. The transplanter of the invention is provided with a simple-structure planting part which can form a pit for storing water at the periphery of each planting object which is planted by the planting device.

The invention discloses a non-communication vehicle intrusion detection system. The system includes a detection area arranged between a transfer rail and a main rail, a first vehicle detection deviceused for detecting whether the detection area is occupied, and an object controller used for detecting whether the detection area has any vehicle based on the position information reported by the vehicle, whether the vehicle in the detection area is a non-communication vehicle is determined through cooperation of the first vehicle detection device and the object controller, if the vehicle in the detection area is determined to be the non-communication vehicle, the area controlled by the object controller is locked timely, and the non-communication vehicle is prevented from entering the main rail. The system is advantaged in that on the condition that rail-side equipment is not increased, whether the detection area is occupied can be conveniently detected, on the condition that the non-communication vehicle is detected, the area controlled by the object controller is locked timely, intrusion prevention of the non-communication vehicle is achieved, and reliable guarantee is provided forsafe running of the vehicle.

The invention relates to a preparation method of a composite small-caliber artificial blood vessel, and a product thereof. The preparation method comprises the following steps of decellularizing a coronary artery to obtain a decellularized blood vessel; then heparinizing the decellularized blood vessel, using a mixed electrospinning solution of gelatin and poly L-lactide-caprolactone (PLCL) for spinning, and removing an organic solvent, thus obtaining the small-caliber artificial blood vessel. The prepared artificial blood vessel is a double-layer tissue engineering blood vessel, adopts decellularized porcine coronary artery as an artificial blood vessel inner layer, has good compliance and cytocompatibility, and can promote cell adhesion, proliferation and differentiation, and spreading so as to accomplish reendothelialization of the blood vessel; an outer layer is a blending layer of the PLCL and the gelatin, so that the mechanical property of the blood vessel is improved, cells of smooth muscle and the like are favorably intruded, and a middle layer of the blood vessel is formed; the inner surface of the inner layer can be modified by different drugs such as heparin, so that theantithrombus of the artificial blood vessel is improved, the blood vessel intima formation is promoted, and the blood vessel is favorably rebuilt.

The invention provides a retractable and broken PDC composite drill bit, which relates to the technical field of oil drilling tools, and includes a drill body and a blade fixed on the drill body. The blade is provided with several cutting teeth. The drill bit The center of the body is provided with a breaker bit detachably connected to the drill body, an embedding groove for inserting the breaker bit, and an ejection mechanism, and the ejection mechanism is arranged in the drill body and is fixedly connected with the breaker bit; the drill body A floating support block is arranged between the broken drill bit. Through the implementation of this technical solution, the rock-breaking efficiency of the core of the drill bit can be effectively improved, and the technical problem that the PDC bit is difficult to drill in the hard formation is overcome; and the drill bit body around the broken bit body will not be caused faster Wear and tear is conducive to improving the service life of the drill bit and saving drilling costs.

The invention discloses a quick release agent of large-dose medicine.The quick release agent is composed of an active ingredient and a quick release matrix containing high-hydrophily auxiliary materials.The quick release matrix is prepared from, by weight, 10% to 30% of high-hydrophily auxiliary materials, 0.05% to 0.4% of surface active agent, 0.1% to 15% of high-molecular polymer and the balance solvent.The quick release agent can be fast disintegrated and dispersed in the oral cavity after being taken, and disintegration difficulty cannot be caused.Due to the specific quick release matrix and the 3D printing technology, the preparation can be formed by the large-dose medicine through few auxiliary materials, the medicine loading capacity is improved, the active ingredient can be released according to computer simulation, the production process is environmentally friendly, and bioavailability is improved.

The invention provides an iodine-containing disinfectant used for the livestock and poultry breeding industry. The disinfectant comprises 2-20%W / V of a single-chain quaternary ammonium salt, 0.5-5%W / V of a quaternary ammonium salt synergist, 0.1-2%W / V of iodine, and the balance other components. The disinfectant is an iodine and quaternary ammonium salt contained disinfectant having the advantages of good safety, good disinfection effect, and strong stability, and can realize the purposes comprising disinfection effect improvement and stability enhancement of the iodine complex disinfectant. So the iodine-containing disinfectant can be used for disinfecting livestock and poultry culturing farm spaces, equipment in livestock and poultry farms, and the body surfaces of animals.

The invention discloses a soil improving agent for soybean planting and a preparation method thereof, and belongs to the field of agricultural production. The soil improving agent is prepared by mixing plant ash, a nitrogen fertilizer, a phosphate fertilizer, biological manure, a nutrient solution and tedded sludge; the biological manure and the nutrient solution are obtained by the steps of carrying out mixed fermentation of animal dung, calcium oxide, calcined red mud, urea, vinasse, corn straw and peanut seedlings, and then filtering to obtain a filter residue being the biological manure and a filtrate being the nutrient solution. Through mixing of the specially-prepared biological manure with the plant ash, nitrogen fertilizer, phosphate fertilizer and other conventional fertilizers, the soil improving agent fully meets the needs of soil; moreover, the soil improving agent also contains the tedded sludge and the nutrient solution, further enhances the soil fertility, thereby improving the yield and quality of soybeans.

The invention relates to a detection line, in particular to a water leakage detection line. The water leakage detection line comprises a line loading rod, the detection line, a signal line and two induction lines, wherein four grooves are spirally formed on the line loading rod, and the detection line, the signal line and the induction lines are respectively spirally embedded in the grooves. An inner line core is arranged at the shaft center of the line loading rod. The water leakage detection line can be matched with a water leakage alarm host for use after being connected with a special connector according to the requirements, thereby forming a sustainable water leakage detection system. The water leakage detection line can detect the water intrusion in any position of a cable along the line, start the alarm and precisely indicate the water leakage position. The water leakage detection line has a wide range of applications and can be used in places which are possible to cause the water leakage in a computer room, a telecommunication room, a power room, a data central subfloor, a mansion, a roof water tank and the like for preventing the loss caused by water leakage. The induction lines in the water leakage detection line can be exposed on the surface, thereby being easy to detect the water intrusion, being protected by a spiral line shaft and avoiding the impact, the friction and the damages caused by obstacles. The water leakage detection line has excellent performances of novel design, practicality, firmness, wear resistance, corrosion resistance, fire resistance, toughness and the like and can be used repeatedly in a corrosive environment, and the service life can achieve 15-20 years under normal conditions.

The invention discloses a multifunctional filtering material and a preparation method thereof. According to the method, a supporting layer non-woven fabric is subjected to antibacterial treatment by preparing an antibacterial finishing liquid containing silver nitrate, copper nitrate and carboxymethyl chitosan; and the supporting layer non-woven fabric subjected to antibacterial treatment, an active carbon layer, a filtering layer non-woven fabric and a protection layer non-woven fabric are stacked layer by layer and compounded to prepare a multifunctional filtering material capable of comprehensively filtering solid pollutants, gaseous pollutants and microbial pollutants. According to the invention, by adopting the technical scheme, the multifunctional filtering material can achieve efficient antibacterial and long-acting antibacterial effects; by adjusting the gram weight and the thickness of each layer of the material and the related process parameters of the multifunctional filtering material, the comprehensive optimal filtering effect is achieved; and the preparation method is simple, the product structure is reasonable, and the application range is wide.

The invention discloses application of long-chain non-coding RNA lnc-HCAR in preparation of bone repair system based on endochondral osteogenesis. The nucleotide sequence of the lnc-HCAR is SEQ ID NO.As shown in Fig. 1, the lnc-HCAR can promote the expression of Vegfa gene and Mmp13 gene, and can competitively bind to miR-15b-5p, thereby promoting hypertrophy of chondrocytes, promoting blood vessel formation in cartilage osteogenesis, and promoting Remodeling of the matrix in the cartilage osteogenesis. The bone repair system based on the long-chain non-coding RNA lnc-HCAR includes lnc-HCAR,gene delivery system, mesenchymal stem cells and porous bone scaffold materials. The invention has good application prospects in tissue engineering bone construction and bone defect repair.

The invention discloses a preparation method of viscose fiber, and belongs to the technical field of preparation of artificial fiber. The preparation method comprises the steps of mixing degummed silk cocoons with deionized water, and filtering to acquire a filter cake; adding calcium chloride and the like to mix and heating; rotary evaporating to prepare protein concentrated solution; taking wheat bran to be mixed with deionized water and boiling; adding mixed enzyme for enzymolysis, and filtering, drying, ball milling and screening to acquire separated fiber particles; electrospinning the protein concentrated solution and the separated fiber particles to acquire the viscose fiber after activating and carbonizing palm fiber. Therefore, the problems that the traditional viscose fiber is poor in elasticity and prone to deform when wearing, generates wrinkles and has poor antibacterial endurance are effectively solved. The preparation method provided by the invention is simple in steps, and the acquired viscose fiber has good elasticity and antibacterial endurance, and no wrinkle and deformation occurs when wearing.

The invention discloses interior wall putty with a mildew-proof function and a preparation method thereof. The interior wall putty with the mildew-proof function comprises the components in parts by mass: 2-8 parts of an inorganic cementing material, 0.2-2 parts of an organic additive, 0.1-1 part of cellulose ether, 80-97 parts of heavy calcium carbonate powder, 0.1-0.5 part of a water repellent,1-5 parts of a mildew preventive and 0.5-1 part of a coalescing agent. The water-resistant EVA rubber powder and the coalescing agent act together, so that the water-resistant EVA rubber powder formsa continuous compact film among gaps of heavy calcium carbonate powder particles, invasion of external water vapor is blocked, and the problems of mildew-proof long-term effect and environmental protection property of the interior wall putty are solved.

The invention discloses a bone induction material which comprises bone induction factors and carriers; the bone induction factors comprise bone morphogenetic proteinbmp or basic fiberblast growth factors, and the carriers form gel matrix through the interaction among fibernogen, fibernectin, heparin, fiber protein stabling factor, thrombin and calcium chloride; the bone induction factor is embedded in the gel matrix. The invention further discloses a preparation method and application of bone induction material, which can release the bone morphogenetic proteinbmp slightly, efficiently and stably, and can improve the biological activity of bone morphogenetic proteinbmp.

The invention relates to a preparation method of an oral biofilm. The preparation method comprises the following steps: adding type I collagen protein into an acetic acid solution to prepare a collagen-acetic acid swelling solution; adding chondroitin sulfate and stirring to prepare a collagen-chondroitin sulfate serous fluid; carrying out vacuum freeze-drying; pressing to prepare a collagen composite film; spraying the collagen-chondroitin sulfate serous fluid between two layers of the collagen composite film, and carrying out vacuum freeze-drying; carrying out high temperature vacuum crosslinking; and sterilizing after crosslinking to obtain a collagen-chondroitin sulfate composite oral biofilm. The invention has the following beneficial effects: the oral biofilm prepared by the above method has good histocompatibility, suitable controllable degradability and absorbability, low antigenicity and good plasticity and mechanical property; the oral biofilm is used in oral operation; and the three-dimensional porous structure of the oral film provides a tissue engineering scaffold for repairing of wounded tissues, is beneficial to invasion of cells and differential growth and can induce reparative regeneration of defective tissues, and specific thickness of the biofilm can effectively prevent ingrowth of soft tissue.

The invention discloses a rotary tooth and belongs to the technical field of drilling equipment of petroleum and natural gas, mine engineering, building foundation engineering construction, geology, hydrology and the like. The rotary tooth comprises a cutting element and a rotary seat, wherein a front cutting surface of the cutting element of the rotary tooth or the geometric center of the front cutting surface of the cutting element is deviated relative to a rotary axis of the rotary seat of the rotary tooth; a rear cutting surface of the cutting element of the rotary tooth or the geometric center of the rear cutting surface of the cutting element is located on the same side of the deviation direction of the front cutting surface; and the front cutting surface of the cutting element is close to the rotary axis of the rotary seat relative to the rear cutting surface. By adopting the rotary tooth provided by the invention, the problems of an existing drilling tool or rock crushing tool that a compound tooth (such as a PDC (Polycrystalline Diamond Compact) tooth) cannot be adopted or the compound tooth is easy to damage and the service life is short are solved; and meanwhile, when a cutting tooth (such as a hard alloy tooth) which is the same as that in the prior art is used, the abrasion of the cutting tooth and the abrasion passivation speed of the cutting tooth are relatively good.

The invention discloses a glasses pipe processing device and processing method. The processing device comprises a punch mould, a pressing mould and a driving mechanism, wherein the punch mould comprises a first punching section and a second punching section which are connected; the cross sections of the first punching section and the section punching are oblong or elliptic; the pressing mould comprises a base, a first mandrel, a second mandrel and an outer sleeve body; the first and second mandrels and the outer sleeve body are mounted and arranged on the base; intervals are arranged between the first and second mandrels and the inner side wall of the outer sleeve body; finger faces or inclined faces are arranged at end parts of the first and second mandrels; a first flange and a second flange are arranged on the inner side wall of the outer sleeve body; the first flange and the second flange are arranged oppositely and are positioned between the first mandrel and the second mandrel; and the driving mechanism is in transmission connection to the punch mould and the pressing mould. According to the invention, a pipe fitting can be punched and deformed via the punch mould and the pressing mould to obtain a glasses pipe, the working efficiency is improved and the product quality of the glasses pipe is high.

The invention discloses an automatic sandpaper peeling mechanism for a CNC production line. The mechanism comprises the following components: a mounting plate extending in a vertical direction; a peeling drive component mounted on the mounting plate; and a peeling component which is connected to the peeling drive component in transmission connection, the peeling component comprises a peeling mounting plate and a peeling plate which fixedly mounted on the peeling mounting plate, wherein the peeling mounting plate extends in a vertical direction, the peeling mounting plate is connected with thepeeling drive component in transmission connection, and the peeling mounting plate is driven by the peeling drive component for reciprocating elevation in a vertical plane. The mechanism effectively solves the problems of incomplete peeling, peeling residue and the like, while improves the peeling efficiency, saves cost and improves production efficiency.

The invention relates to a tapping screw for engineering plastics, which comprises a screw head and a screw rod, wherein the screw rod is provided with helical threads, an outline of a thread form section comprises an inner incline, an intermediate incline, an outer incline and a thread top surface connected with the outer incline from a screw rod thread bottom to a screw rod thread top; the inner incline, the intermediate incline, the outer incline and the thread top surface are symmetrically arranged along the center and are sequentially connected, the inner incline has a thread angle alpha of 140 DEG+ / -3DEG and an inner thread length L2 of 1 / 5 of the total length of a thread form, the intermediate incline has a thread angle beta of 20DEG + / -3 DEG and an intermediate thread length L2 of 2 / 5 of the total length of the thread form, and the outer incline has a thread angle gamma of 30DEG+ / -3DEG and an outer thread length L3 of 2 / 5 of the total length of the thread form. According to the invention, the stability of multiple connections can be improved and the service life of the tapping screw is prolonged while the connection requirement is met.

The invention discloses a cell breaking system. The system comprises at least one cell breaking production line, each cell breaking production line comprises a rotary feeding device, a detection device, a cutting device, a blanking and moving device and a cell breaking device; the rotary feeding device transmits the whole cell to a detection station, a cutting station and a blanking station sequentially according to a cell breaking process; the detection device is arranged in the detection station, and used to detect whether the whole cell in the detection station meets the standard; the cutting device is arranged in the cutting station, and used to pre-cut segmentation lines on the whole cell in the cutting station; the blanking and moving device moves the whole cell after precutting in the blanking station to the cell breaking station; and the cell breaking device is arranged in the cell breaking station, and used to break the whole cell after precutting along the segmentation lines.Thus, the cutting device cut the whole cell with the segmentation lines, so that the whole cell is broken into multiple pieces conveniently later, and the working efficiency of the cell breaking system is improved greatly.

The invention discloses a waterproof combined self-tapping screw, which includes a screw head, a screw rod and a thread. A silicone gasket is provided at the neck where the screw head and the screw rod are connected. The contact surface, and the second contact surface near the head of the self-tapping screw, form a profile angle between the first contact surface and the second contact surface, and the profile angle is 15°-45°; the thread The root of the first contact surface is connected to the axial direction of the screw through an arc-shaped transition section; the root of the second contact surface of the thread is directly connected to the axial direction of the screw, and the two straight lines meet to form an obtuse angle. A silicone gasket is assembled on the neck of the screw head and the screw rod, and when the self-tapping screw is completely locked into the connection material, it has a waterproof sealing effect; an arc-shaped transition section is added on the first contact surface side of the screw teeth, and the second of the screw teeth The contact surface side maintains its straight line connection and forms an obtuse angle to achieve the self-tapping effect of "easy to enter and difficult to exit" when self-tapping screws are locked in.

The present invention relates to a window / door apparatus that is easy to construct, more specifically to a window / door apparatus with a window / door sash, such as a window or entrance door, and a window / door frame in which the window / door sash is coupled and slid, wherein the window / door sash and the window / door frame have an improved structure easy to construct and excellent drainage. The present invention to achieve the mentioned objective comprises: a window / door frame fixture which is fixed in two or more rows in a window / door frame installation position, having an open-top structure in which vertical plates are integrally formed on both ends of a bottom plate and a seat plate is integrally formed in the middle of the length on the inner surface of each vertical plate; a window / door frame support comprising a mounting plate with both ends placed on the seat plates of the window / door frame fixture, a support plate which is formed on the lower surface of the mounting plate and supported by the bottom plate of the window / door frame fixture, a pair of coupling projections projected upward on the upper surface of the mounting plate, and a lock groove formed on the inner wall of each coupling projection; a rail member comprising a horizontal plate with a rail projected on the upper surface thereof, a fastening projection projected downward on the lower surface of the horizontal plate, and a lock protrusion projected on the outer wall of the fastening projection to be fastened to the lock groove with one touch; a window / door sash actuator comprising a press-fit structure with top and side plates which is press-fitted into a press-fit space formed in the lower part of a window / door sash, a roller coupled to roll on the lower surface of the top plate of the press-fit structure, and a support plate.

The invention discloses a preparation method of a nano material-based bionic bone scaffold. The preparation method comprises following steps: a negative die is prepared via fused deposition modeling; dissolved biomaterial PLGA is mixed with nano-grade beta-TCP powder, and an obtained mixture is mixed uniformly using a vibration grinder; an obtained slurry is injected into the negative die via negative pressure method, and the negative die is delivered into a freeze dryer for freeze drying; and the negative die is removed so as to obtain the nano material-based bionic cone scaffold. The nano material-based bionic cone scaffold is capable of satisfying requirements on scaffold materials, structures, and strength; controllable adjustment on appearance and porosity is realized; customized manufacturing of scaffolds implanted at bone defect parts is realized; success rate of complex bone defect treatment in clinic is increased effectively; and application prospect in clinic is promising.

The invention discloses an automatic abrasive paper replacing device for a CNC production line. The device comprises an automatic abrasive paper feeding mechanism, which comprises a support assembly,an abrasive paper storing mechanism and an abrasive paper taking-out plate, wherein the abrasive paper storing mechanism and the abrasive paper taking-out plate are arranged on the support assembly; and an automatic abrasive paper peeling mechanism, which is butt-jointed with the support assembly and comprises an installation plate, a peeling driving assembly and a peeling assembly, wherein the peeling driving assembly and the peeling assembly are installed on the installation plate. The peeling assembly is connected to the peeling driving assembly in a transmission mode. Under the driving ofthe peeling driving assembly, the peeling assembly periodically peels off waste and old abrasive paper on a grinding head; and after the waste and old abrasive paper on the grinding head is peeled off, the abrasive paper taking-out plate periodically supplies new abrasive paper to the grinding head. The provided device improves the peeling efficiency, solves the problem that residues are generatedduring the peeling process, reduces the cost, also solves the problem that a machine is stuck during the abrasive paper feeding process, improves the abrasive paper replacing efficiency and success rate, and thus improves the production efficiency.