45results about How to "Suitable for repeated use" patented technology

A device for detecting breathing of a subject, includes a colorimetric CO2 detector. A method for determining whether a subject is breathing and a method for verifying proper placement of an endotracheal tube when using a resuscitation bag are also described.

A mask facilitating breath comprises a mask body, a left ear rope sleeve and a right ear rope sleeve are fixed to the two sides of the mask body, an inner mask cup is arranged on the inner side of the mask body, filtering cotton is installed inside the inner mask cup and connected with an exhaust pipe, a fixed nut is arranged on the exhaust pipe and fixed to the center of the mask body, the exhaust pipe extends out of the mask body, exhaust holes are formed in the outer end of the exhaust pipe, an exhaust valve is arranged inside the exhaust pipe, an exhaust valve body is installed on the exhaust valve, one end of an air inlet pipe is fixed to one side of the inner mask cup, an air inlet valve is installed inside the bottom end of the air inlet pipe, the outer end of the air inlet pipe extends out of the outer side of the mask body, and activated carbon is arranged inside an outer end opening of the air inlet pipe. The air inlet valve is a one-way valve which can only allow entering and not allow leaving, and the exhaust valve is a one-way valve which can only allow leaving and not allow entering. Expiration and inspiration channels are isolated to effectively prevent filtered fresh air inside an air cavity from being polluted by exhalant gas, and the mask of the combined structure can be conveniently detached, cleaned and sterilized and is suitable for being used repeatedly.

The invention discloses a stretchable strain sensor based on polyurethane fiber and a preparation method of the strain sensor. The polyurethane fiber is taken as a matrix, the surface of the matrix issequentially wrapped with an inner conductive structure adopting a graphene nanosheet layer and an outer conductive structure adopting a collaboratively conductive network layer of carbon black and single-walled carbon nanotubes. The strain sensor has good softness, stretching characteristic and large-scale integration characteristic and can serve as a wearable device compatible with skin.

The invention discloses a preparation method of a bio-based composite material. The preparation method comprises the following steps: pulverizing plant fibers, separating out 20-100-mesh fiber bundles, treating by a hot water process or steam explosion process to obtain a plant fiber raw material, wherein the water content is controlled at less than 8%; weighing the following raw materials in parts by mass: 30-60 parts of plant fiber raw material, 40-80 parts of natural high-polymer adhesive and 1-4 parts of additive; and uniformly mixing the weighed raw materials to obtain a reaction mixture, and carrying out die pressing or injection molding to obtain the bio-based composite material. The method has the advantages of simple preparation technique, wide raw material sources and low cost, and implements waste utilization; and the prepared bio-based composite material has the advantages of high strength, natural surface texture, bright color, novel tactile sensation, environment friendliness and the like, and is suitable for reuse.

The present invention discloses an LED display module group which is lightweight and transparent, electronic components on the LED display module group cannot be damaged when the LED display module group is bended, rolled and warped under the effect of an external force, and the LED display module group can recover after the external force is withdrawn. The present invention also discloses a base frame disc and an optical control circuit board both for the LED display module group. The LED display module group is formed by the base frame disc which is prepared by soft plastic and is chessboard grid shaped, and the LED optical control circuit board assembled on the base frame disc. Protection assembles which are waterproof, dustproof, impact resistant and anti-electromagnetic interference and can incompletely wrap light source substrates and LED lamp assemblies on the optical control circuit board are also disposed in light source positioning holes of the base frame disc. The protection assemblies can effectively protect the electronic components on the LED display module group from being damaged when the module group is under the effect of the external force. The LED display module group is lightweight, transparent and elastic, can be installed without being supported by complex and ponderous rigid structures, and can be installed in a suspension manner or a pasting manner. The LED display module group is low in investment cost, convenient to assemble and disassemble, good in safety performance, and high in wind load bearing capability, and the disassembled LED display module group can also be reused.

The invention discloses recombinant escherichia coli of a temperature-control coexpression exogenous gene, which is named as Escherichia coli DT26 (pBVNsS) CCTCC NO:M 209018. The genotype of the recombinant escherichia coli is delta nagE::FRT; and the recombinant escherichia coli contain a temperature-control coexpression carrier pBVNsS. Simultaneously, the invention also discloses the application of the recombinant escherichia coli used as a catalyst for the complete cell catalytic preparation of N-acetylneuraminic acid. In the process of the large-scale catalytic production of the N-acetylneuraminic acid, the recombinant escherichia coli of the temperature-control coexpression exogenous gene has the characteristics of safe and convenient preparation of the catalyst, simple operation of the catalytic process, cheap price, higher efficiency, easy extraction and the like.

The invention relates to a method for realizing an embedded system board level supporting package between different operating system. The method comprises hardware abstraction, employing 'register base address plus shift' addressing mode on mass register to be accessed which can replace the presumption of the application and operating system environment to be called. The inventive method has capability and reusability which can accelerate the development and test flow process of the embedded system software including operating system and device driving software.

An object of the present invention is to provide a bioelectrode, which can stably measure biological information and is suitable for repeated use, and a method of manufacturing the bioelectrode. This object is solved by a bioelectrode comprising a silver coating layer provided on a conductive silicone rubber electrode, wherein the conductive silicone rubber electrode is composed of a silicone rubber containing conductive carbon particles, the silver coating layer is composed of silicone rubber and at least one of agglomerated silver powder and flake-like silver powder, and the silver coating layer has a thickness of 18 μm to 80 μm, and, preferably, in which the silver powder contains both the agglomerated silver powder and the flake-like silver powder.

The invention provides a 3D printing mud. The 3D printing mud comprises the following components in parts by weight: 40-75 parts of natural gum or glycerin resin type edible plastic, 5-15 parts of flour, 5-15 parts of glutinous rice flour, 2-10 parts of salt, 3-10 parts of malt sugar, 10-25 parts of gelatin, 5-15 parts of water, and 1-5 parts of pigment. The 3D printing mud has the advantages of environmental protection, safety and the like, and is suitable for repeated application; unnecessary extra expenses of the family are saved; and the interestingness is increased.

The invention discloses a reference electrode clamp used for biological impedance, electric resistance or potential measurement, which comprises an upper clip, a lower clip with are integrated through a clamping shaft, one end of a spring is fixed on the inner side surface of the upper clip, the other end is fixed o the inner side surface of the lower clip, a conductor is arranged on the inner side surface of the lower clip as a reference electrode, one end of the line conductor is connected with the conductor, the other end of the line conductor is connected with the metering circuit.

The invention provides a method for extracting theophylline from tea leaves by using chloromethyl polystyrene resin. The method comprises the following steps: A, extraction of theophylline: preparing a chlorine salt solution, and soaking a tea medicinal material by using the chlorine salt solution for extraction; enrichment of theophylline: performing column chromatography and adsorption on an extracting solution by using chloromethyl polystyrene resin, performing elution after adsorption, collecting an eluent, and then performing reduced pressure concentration to obtain an extract; and C, purification: performing alumina column chromatography on the extract, then performing elution, collecting the eluent, then performing reduced pressure concentration, and performing refrigeration, crystallization, filtration and drying on a concentrated solution to obtain theophylline compounds. According to the method provided by the invention, a large amount of high-quality theophylline compounds can be obtained by virtue of four steps namely acidic chlorine salt solution extraction, macroporous adsorption resin enrichment, alumina column chromatography and crystallization. The four steps are mild in condition, high in adsorption efficiency and short in preparation cycle; and the method is simple in technological process and simple and convenient to operate, has low requirements for the technological level of operators, and is suitable for industrial popularization.

A pet training device including a generally cylindrical body and a pair of wings extending therefrom. Each wing includes a resilient stiffener element which tends to return a deflected wing back into a predeflected configuration. The body may define a head portion having a aperture through which a rope is secured, said rope being sufficiently sized to allow a user to grasp and throw the pet training device. The head portion may also be defined by an external head secured to the body via a flexible rope neck element. A method of using such a pet training device is also disclosed.

The invention discloses an oxygen belt and acetylene belt wiring device for installing a power station boiler. The oxygen belt and acetylene belt wiring device for installing the power station boileris formed by assembly of a plurality of main line parts, a plurality of branch line parts and a plurality of three-way parts, wherein the main line parts and the branch line parts have the same structure; major structures of the main line parts and the three-way parts are of square tubular structures; one end of the main structure is connected to an interface through a flared structure; the interface is of a square cylindrical structure; the aspect ratio of the radial section of the interface is equal to the aspect ratio of the radial section of the main structure; the radial cross-sectional area of the interface is larger than the radial cross-sectional area of the main structure; the other end of the main structure of the main line parts is provided with a socket; the radial cross section of the socket of the main line parts has the same radial cross section as the main structure; the other end of the main structure of the three-way parts is provided with at least two sockets; and the angle between every two sockets of the three-way parts is greater than 0 DEG but less than 180 DEG. By means of the oxygen belt and acetylene belt wiring device for installing the power station boiler, the problem that the an oxygen and acetylene belt in the power station boiler construction with dispersing layout type is messy is solved.

The invention discloses recombinant escherichia coli of a temperature-control coexpression exogenous gene, which is named as Escherichia coli DT26 (pBVNsS) CCTCC NO:M 209018. The genotype of the recombinant escherichia coli is delta nagE::FRT; and the recombinant escherichia coli contain a temperature-control coexpression carrier pBVNsS. Simultaneously, the invention also discloses the application of the recombinant escherichia coli used as a catalyst for the complete cell catalytic preparation of N-acetylneuraminic acid. In the process of the large-scale catalytic production of the N-acetylneuraminic acid, the recombinant escherichia coli of the temperature-control coexpression exogenous gene has the characteristics of safe and convenient preparation of the catalyst, simple operation of the catalytic process, cheap price, higher efficiency, easy extraction and the like.

The invention belongs to the technical field of environmental protection, and particularly relates to a heat-resistant environment-friendly bag. The bag includes a heat insulation layer, a heat-resistant coating and a wear-resistant layer. The heat-resistant coating is coated on the inner surface of the heat insulation layer. The heat insulation layer is filled with cotton. The wear-resistant layer is coated on the heat insulation layer. The wear-resistant layer and the heat insulation layer are provided with a hand carrying structure. The inner surface of the heat insulation layer is uniformly provided with circular protrusions. The present invention improves the insulation effect of the bag body by disposing uniform projections to the heat insulation layer. According to the present invention, the inner of the insulation layer is coated with the heat-resistant coating, which plays a protective role on the bag body and effectively prevents the bag body from burning by hot objects. The heat insulation layer and the wear-resistant layer of the present invention are provided with the hand carry structure, the double-layer hand carrying structure is relatively solid, not easy to break and fracture, and suitable for re-use, and plays an environmental-protection effect.

The invention relates to a catalyst used in the synthesis of polyoxymethylene dimethyl ether, which mainly solves the problems of low catalyst activity and low selectivity in the existing technology of synthesizing polyoxymethylene dimethyl ether using methanol, methylal and paraformaldehyde as reaction raw materials. By using a polyoxymethylene dimethyl ether catalyst, the catalyst is a hybrid material of a sulfonic acid-type polystyrene cation exchange resin and an alloy permanent magnet. The sulfonic acid-type polystyrene cation exchange resin includes a cross-linked polystyrene skeleton. and sulfonic acid groups; the technical solution in which the alloy permanent magnet is selected from at least one of AlNiCoTi38, AlNiCoTi60 and AlNiCoTi72 can be used in the industrial production of polyoxymethylene dimethyl ether.

Disclosed is a plastic constraint component for bending a thin wall profile material. The plastic constraint component for bending the thin wall profile material comprises a plastic constraint component body, wherein the plastic constraint component body is made of plastic material and can achieve three dimensional bending, the plastic constraint component body is inserted into the profile material with an enclosed section or the profile material with a semi-enclosed section, or overall surrounds the profile material with an open type deformed section, and thereby restrains the surface of the profile material with the enclosed section, or the profile material with the semi-enclosed section or the profile material with the open type deformed section, and excellent surface quality of the thin wall profile material can be kept when the thin wall profile material severely deforms. The plastic constraint component for bending the thin wall profile material is simple in structure, easy to install and use, and wide in use range.

The invention discloses a reference electrode clip for measuring biological resistance, impedance and potential. It consists of two clamping members with a pair of fins protruding inward in the middle. The fin holes are connected by a clamp shaft. The clamp spring is sleeved on the rotation shaft of the two pairs of fins. On the inner side, the other end of the clip spring is fixed on the inner side of the other clamping member to realize the opening and closing movement of the pair of clamping members around the clamping shaft. On the inner side of the upper end of a clamping member, an electrode connected with a wire is provided. Or a non-conductive buffer pad is installed on the inner surface of the upper end of the other clamping member at the position opposite to the electrode. When in use, connect the reference electrode clip to the measurement circuit, then open the electrode clip, and fix the electrode on the surface of the human body by the clamp force of the clip, so that the electrode is in full contact with the surface of the human body, and can be used together with the measuring electrode for measurement. It is also very convenient and quick to take off the electrodes, which will not cause discomfort to the human body and is suitable for repeated use.

The invention relates to a catalyst for polyformaldehyde dimethyl ether synthesis. In the prior art, with the application of methanol, methylal and paraformaldehyde as reaction raw materials to synthesize polyformaldehyde dimethyl ether, the activity and the selectivity of the catalyst are low. A purpose of the present invention is mainly to solve the problems in the prior art. The technical scheme of the present invention comprises that by using the catalyst for polyformaldehyde dimethyl ether synthesis, the catalyst is the hybrid material of a sulfonic acid type polystyrene cation exchange resin and an alloy permanent magnet, the sulfonic acid type polystyrene cation exchange resin comprises a cross-linked polystyrene skeleton and a sulfonic acid group, and the alloy permanent magnet is at least one selected from AlNiCoTi80, AlNiCoTi36J, and AlNiCoTi40J. The catalyst of the present invention can be used in the industrial production of polyformaldehyde dimethyl ether.

The invention relates to a catalyst used for polyoxymethylene dimethyl ether synthesis. The catalyst mainly solves the problems of low catalyst activity and low selectivity of technologies for synthesizing polyoxymethylene dimethyl ether from methanol, methylal and paraformaldehyde in the prior art. The catalyst is a sulfonic acid type polystyryl cation exchange resin and alloy permanent magnet hybrid material, and the sulfonic acid type polystyryl cation exchange resin comprises a crosslinked polystyrene skeleton and a sulfonic group; and the alloy permanent magnet is selected from at least one of AlNiCo40, AlNiCo44 and AlNiCo52. The catalyst is used in industrial production of the polyoxymethylene dimethyl ether.

The invention belongs to the technical field of crop cultivation, and particularly provides a composition for preventing germs and removing pesticide residues for tea, which comprises the following components in percentage by mass: 5.0 to 30.0 percent of organophosphorus hydrolase HT976, 5.0 to 30.0 percent of pyrethroid hydrolase HT986, 3.0 to 20.0 percent of trehalose, 1.0 to 8.0 percent of bioglycolipid, 0.5 to 10.0 percent of moutan bark extract and 0.1 to 2.0 percent of acid-base regulator, the pH value is 5.0 to 9.0, and the balance of water. The balance is water or maltodextrin. The composition provided by the invention has the advantages that the components are safe and free of toxic and side effects, the problems of preventing and treating germs of tea trees, increasing the tea yield, removing pesticide residues in soil and the like in the picking period of small camellia and rice field tea can be solved, and the pesticide removing effect on tea is improved.

The invention discloses colored unfired pottery clay and a preparation method thereof. The pottery clay is prepared from, by mass, 55-60% of flour, 2-8% of magnesium chloride, 13-18% of magnesium oxide, 0.02-0.12% of toner, 1.2%-1.8% of diethylene glycol dibenzoate, 3-7% of a lemongrass extracting solution, 3-6% of vegetable oil and the balance water. The preparation method includes the steps that all the components are weighed, and magnesium chloride and magnesium oxide are mixed, ground and screened to obtain a first mixture; the flour is added into the first mixture and evenly stirred at the speed of 350-400 rpm to obtain a second mixture; the toner and diethylene glycol dibenzoate are added into the second mixture and stirred, then the lemongrass extracting solution, the vegetable oil and the water are added, and the materials are blended for 20-30 min to obtain the colored unfired pottery clay. The preparation process of the colored unfired pottery clay is simple, the pottery clay is high in plasticity, cost is low, and industrialization is facilitated.

The invention discloses a repeated-plastic oral cavity impression tray and manufacturing and using methods. The oral cavity impression tray is prepared from 85-99 parts (by weight) of memory high-polymer material, 0.05-1 part (by weight) of antibacterial agent and 0.05-1 part (by weight) of pigment. The oral cavity impression tray is prepared from the memory high-polymer material through injectionmolding, and the size of the impression tray can be adjusted according to an oral cavity tissue size of a patient, so that the degree of comfort of the patient during impression is increased; the tray is high in deformation, remarkable in memory effect and low in induction temperature and is suitable for being used repeatedly; and the oral cavity impression tray is doped with the antibacterial agent and can be disinfected automatically, so that a disinfection process is avoided, and resources of hospitals are saved.

The invention relates to a goggle controller. A collecting electrode can hiddenly and firmly fit the face of a user by utilizing a contact surface in a goggle frame structure; on one hand, a sticky substance for attaching the collecting electrode to the face of the user can be saved, the wearing comfort of the user is improved, and the collecting electrode is more suitable for repeated use; on theother hand, the influence of the outside on the collecting electrode is reduced, and the reliability of the electro-oculogram collecting process is improved; besides, with goggles as a basic frame, the structural strength and durability of the controller are ensured; in addition, the scheme integrating electro-oculogram and head posture control enriches the control dimension of the goggle controller, and the goggle controller can be adjusted to be an intelligent controller with specific control functions according to different use scenes and has broad application extensibility.

The invention relates to a catalyst for polyoxymethylene dimethyl ether. The catalyst is mainly used for solving the problem of processes for synthesizing the polyoxymethylene dimethyl ether from methanol, methylal and paraformaldehyde in the prior art that catalysts are low in activity and low in selectivity. Through adopting the technical scheme that the catalyst for the polyoxymethylene dimethyl ether is a hybrid material of sulfonic acid type polystyrene cation exchange resin and permanent-magnetic ferrite, the sulfonic acid type polystyrene cation exchange resin comprises a crosslinked polystyrene skeleton and a sulfonic acid group, and the permanent-magnetic ferrite is at least one selected from BaFe12O19, Pm3Fe5O12 and Sm3Fe5O12, the catalyst can be applied to the industrial production of the polyoxymethylene dimethyl ether.