59results about How to "Easy for industrial production" patented technology

The invention discloses a method for preparing L-2-aminobutyric acid by an enzyme method and mainly solves the problems that the yield is low, the cost is high and the process condition is not suitable for industrial production in the conventional enzyme catalysis preparation method. A technical scheme of the invention is that: the method for preparing the L-2-aminobutyric acid by the enzyme method is characterized by comprising the following steps of: converting L-threonine which is taken as a starting material into 2-ketobutyrate by using threonine deaminase; and then converting the 2-ketobutyrate into the L-2-aminobutyric acid by using leucine dehydrogenase, and adding hydrogenlyase used for coenzyme generation in the reaction. The method for preparing the L-2-aminobutyric acid by the enzyme catalysis preparation method has the advantages of high efficiency, low cost and easy implementation of industrial large-scale production.

The invention relates to the technical field of bioengineering and in particular relates to a synthetic method of L-theanine. The method comprises the following step of synthesizing L-theanine by taking gamma-glutamyl-methylamine synthetase and phosphokinase as catalysts and L-sodium glutamate and ethylamine hydrochloride as substrates. The method can be used for producing a lot of cloned expression proteins as catalysts by taking L-sodium glutamate and ethylamine hydrochloride which are relatively low in price as the initial raw materials, and has the advantages of being mild in reaction condition, strong in specificity, high in reaction conversion rate, simple and convenient to operate, low in requirement on reaction equipment, small in environmental pollution and the like.

Device including a bottle having two open ends and a central body receiving a first product, one end of the bottle has an orifice receiving a stopper which contains a second product to be mixed with the first, another end of the bottle has an orifice receiving a removable cap provided for withdrawing the mixture after removal of the cap.

The invention discloses washing mechanical equipment used for fabric. The equipment comprises a rack, and a fabric conveying and adsorbing system and a washing device are installed on the rack. The invention further discloses a washing method for the fabric, and the method includes the following steps that A, stirring and emulsifying: chemical agents and water are quantitatively added to a stirring water box, and an emulgator is used for stirring and emulsifying; B, mist spraying and washing performed on the fabric: emulsified washing liquid is conveyed to part of nozzles through a metering pump to perform mist spraying and washing on the fabric, and the fabric washed by the washed liquid is washed quantitatively by part of tap water through a pressure regulating valve; C, waste water recycling: the water after spray washing is recycled through a vacuum pump and a vacuum sucker, and the absorbed water is subjected to aftertreatment; D, the washed fabric directly enters a drying oven to be dried. The washing mechanical equipment has the advantages of being easy to operate, easy to manufacture industrially, particularly capable of greatly reducing water consumption, protecting water resources to the greatest extent and protecting the environment and the like.

The invention relates to a preparation method of a silicon nitride ceramic, which belongs to the technical field of the special ceramic. The method comprises the following steps of blending, molding and burning and is characterized in that the silicon nitride ceramic comprises the following components of 82-88 percent of alpha-Si3N4 powder, 5-10 percent of AL2O3, 3-6 percent of ZrO2 and 1-3 percent of Y2O3 by weight; the components are evenly mixed by ball milling by taking water as the medium, then the polyvinyl alcohol with 0.8-1.2 percent of the total component weight is added in for mixing for 1-5-3 hours to obtain pulp, the pulp is dried for granulation, and the isostatic compaction is performed at the pressure of 110-180 MPa to obtain blank; the blank is loaded in a nitriding furnace and is protected in the nitrogen atmosphere, and the burnt temperature is controlled between 1550-1720 DEG C. The invention is low in cost, is easy for realization of the industrialization production and extends the application range.

The invention provides a double-layer circuit and a manufacturing method thereof, and relates to the technical field of printed electronic manufacturing. The manufacturing method comprises the following steps: S1, selecting a base material; S2, forming a via hole penetrating the base material; S3, forming surface modification layers adhered with liquid metal on the two surfaces of the base material and the inner walls of the via holes; S4, forming liquid metal non-adhesive patterns on the surface modification layers on the two surfaces of the base material by using a liquid metal non-adhesivematerial; and S5, coating the area, which is not shielded by the pattern not adhered with the liquid metal, of the surface modification layer with the liquid metal to form a liquid metal double-layercircuit. According to the liquid metal double-layer circuit, direct coating of the liquid metal on the two sides of the base material can be achieved through the coating adhering to or not adhering tothe liquid metal, so that compared with direct writing printing, the liquid metal double-layer circuit is high in manufacturing efficiency, simple in manufacturing process and convenient to industrially manufacture in batches.

The invention relates to the field of conductive thin film materials and provides a ZnO composite transparent conductive thin film based on a flexible substrate and a preparation method thereof. At first, a bottom layer of ZnO, a middle metal layer consisting of method Al and metal Cu and a top layer of ZnO are sputtered on a flexible PET substrate by magnetron sputtering, then a ZnO composite transparent conductive thin film based on the flexible PET substrate is obtained. According to the invention, the ZnO composite transparent conductive thin film based on the flexible substrate ensures high light transmittance and electrical conductivity, and meanwhile, the raw material price is greatly reduced and is easier to obtain, the preparation method has the advantages of simple preparation, good controllability and low requirement for equipment operation, and can be widely used in industry.

The invention discloses a single plating type zinc-aluminum-magnesium-rare earth protection coating with high corrosion resistance and a preparation technology. According to the single plating type zinc-aluminum-magnesium-rare earth protection coating technology, a zinc-aluminum-magnesium alloy coating can be acquired on a metal surface with a single hot dipping method; respective original performance of the coating and a metal matrix are kept, but the coating and the metal matrix form a metallurgical bonding interface of more than 99.9%, meanwhile, the coating is compact in structure, has stable components and excellent corrosion resisting performance and avoids skip plating, and salt-spray corrosion reaches 2,060 h; the corrosion resistance of the alloy coating is better than that of a common hot dipping pure-zinc coating, and the service life is prolonged. The single plating type technology can be reused and applicable to industrial production, overcomes defects that assistant plating of metal and a zinc-aluminum-magnesium alloy liquid is difficult, an excellent metallurgical bonding interface between the metal and the zinc-aluminum-magnesium alloy liquid is difficult to form, the probability of skip plating is high and the like, and can be widely applicable to preparation of a zinc-aluminum-magnesium alloy plating solution containing 5%-12% of Al and 1%-6% of Mg on the metal surface; a prepared co-penetrated layer forms Zn/Al/MgZn2 ternary eutectic and multiple types of binary eutectic, and the eutectic is the major reason for guaranteeing high corrosion resistance of the co-penetrated layer.

The invention discloses a kit for detecting the activity of a protein C. The kit for detecting the activity of the protein C provided by the invention comprises a protein C activating agent obtained by separating and purifying venom of vipers in Qinling Mountains of China, and a developing substrate reagent, and belongs to detection by a developing substrate method. The kit has good detection specificity and is not easy to be interfered; and raw materials are easy to obtain, the preparation is simple, the operation is simple and fast in a detection process, and an instrument applicable range is wide, so that the kit is convenient to popularize and use in each level of hospitals, hygiene departments and the like.

The invention belongs to the field of modified plastics, particularly discloses a polyphenylene sulfide composite material with high impact and high CTI, a preparation method and application thereof. the composite material is prepared from polyphenylene sulfide, nylon 66, toughening agent, glass fiber, antioxidant, lubricating agent and coupling reagent. Aiming at the defect that PPS resin is prone to tracking failure, PA66 resin with high CTI is added, and the addition of PA66 not only improves the CTI of the PPS composite material, but also improves the impact strength of the PPS composite material, and the PPS composite material with high impact and high CTI is obtained through further toughening effect of PA66 high-efficiency toughening agent. According to the preparation method, the operation is simple, the obtained PPS composite material with high impact and high CTI is low in cost, and has a very good prospect for popularizing in the market. The composite material has excellent impact resistance and excellent tracking failure resistance, and can be used in electrical and electronic and other related fields where the above performance requirements are higher.

The invention discloses a making process of pickled vegetables rich in active probiotics. The making process comprises the following steps of thoroughly cleaning vegetables, and then performing air-drying; putting mother water for pickled vegetables in a container for pickled vegetables; placing the air-dried vegetables in the container for pickled vegetables, and enabling water in the container for pickled vegetables to be just higher than the vegetables; inflating nitrogen into the container for pickled vegetables to enable the nitrogen to form an oxygen separation layer on the surface of the mother liquid for the pickled vegetables; loading probiotics into the container for pickled vegetables; and performing sealing operation, and fermenting the vegetables in the container for pickled vegetables. An open inflating manner is directly used, and only a nitrogen layer needs to be directly formed on the surface of the mother liquid for the pickled vegetables, so that separation of the oxygen in air is realized, and growth of oxygen consumption putrefying bacteria (mould, microzymes, bacillus and escherichia coli) can be prevented. Besides, the environment in the mother liquid for pickled vegetables is oxygen-free environment, the environment is particularly suitable for growth of the anaerobic probiotics, the probiotics are active microorganisms beneficial for hosts, and can generate precise healthy efficacy for intestinal tracts and reproductive systems of human bodies, so that the function of human bodies can be improved, and the making process can elaborate beneficial effects.

A method for preparing the linezolid (compound 1), which comprises the steps of: (1) carrying out the debenzyl reaction of compound 4 in solvent, to obtain the compound 5 or its acetate; (2) carrying out the acetylation reaction in the amino of the compound 5 or its acetate obtained in step (1) in solvent to obtain the compound 1. The intermediates to prepare the compound 1 and the acetate of compound 5. The present preparation method is easy to obtain the chiral materials and the chiral materials are cheap, the process and the post treatment are simple, the intermediate products and the end product are easy to be purified, the total yield is high, their purities are also high, this preparation method is easy to be used in the industry manufacture.

The invention provides a cam bit die. The cam bit die comprises a bottom die, an outer die and an inner die, wherein a through hole which is matched with the outer die is formed in the bottom die, a groove which is matched with the inner die is arranged at one end of the outer die, a cam hole which penetrates the other end of the bottom of the outer die is formed in a surface of the groove, one or a plurality of outer die air grooves which connect the cam hole and side walls of the groove are formed in the surface of the groove, ends of the inner die, which are in contact with the outer die, are provided with chamfers, annular air grooves are formed between the chamfers and the outer die, one or a plurality of inner die air grooves which connect two ends of the inner die are formed in outer side walls of the inner die, the inner die is connected with the outer die through the groove, the outer die is connected with the bottom die through the through hole, and the outer die air grooves are communicated with the inner die air grooves through the annular air grooves. The cam bit die has the advantages that the structure is simple, the design is skillful, corner collapse and burrs are absent, the application range is wide, and the like.

The invention discloses a simple and convenient method for preparing a nano-silver complex antimicrobial agent. A water solution containing gamma-polyglutamic acid, a silver ion source and magnesium lithium silicate is pyrolyzed, and the pyrolyzed powder is the nano-silver complex antimicrobial agent. The simple, convenient and ingenious method combining a physical method and a chemical method provided by the invention has the characteristics of simplicity, convenience, environment protection, high efficiency and high antimicrobial activity; and according to the prepared nano-silver complex antimicrobial agent, nano-silver particles are small in particle size and good in dispersibility without agglomeration, and the nano-silver complex antimicrobial agent can be gradually released from a substrate so as to achieve the aim of a long-term antimicrobial property.

The invention discloses a positioning method in a carbon fiber product processing process. One or more positioning pins made of resin materials are arranged on a carbon fiber product, the positioningpins and assembly parts made of the same materials are used for positioning operation, and the positioning pins are polished cleanly after operation is finished without affecting the surface of the product. The positioning method has the advantages that the positioning method is simple in structure, ingenious in design and accurate in positioning, facilitates processing, and does not affect the surface of carbon fibers and the like.

The invention discloses a rod feeding device of a horizontal directional drilling machine. The rod feeding device is fixed on a girder and comprises a manipulator, a supporting plate, a fixing shaft,a fixed hinged support and a rotary oil cylinder, wherein the manipulator is fixed on the supporting plate, the fixing shaft is arranged on one side of the manipulator, the fixing shaft is fixedly connected with the fixed hinged support, the rotary oil cylinder is arranged on the other side of the manipulator, the rotary oil cylinder is fixed on the fixed hinged support, the fixed hinged support is fixed on the girder, the two ends of the supporting plate are located on the two sides of the manipulator, one end of the supporting plate is in pivot connection with the fixing shaft, and the otherend of the supporting plate is in pivot connection with the rotary oil cylinder. The manipulator has the advantages of being simple in structure, ingenious in design, convenient to transform, capableof balancing manipulator tension and reducing shaking of the manipulator during working and the like.

The invention relates to a silicon-containing supercritical CO2 dry fracturing fluid thickening agent. The thickening agent is prepared from 18g to 27g of methylcyclosiloxane, 9g to 13g of vinyltriethoxysilane, 30g to 35g of vinyl acetate, 9g to 13g of sodium dodecyl benzene sulfonate, 3g to 4g of dodecylbenzene sulfonic acid, 2.5 g to 5.5 g of polyvinyl alcohol, 4g to 5.4 g of octylphenol polyoxyethylene ether, 2.5 g to 3.6 g of lauryl sodium sulfate, 3g to 3.1 g of ammonium persulfate and 89g to 155g of deionized water. The product provided by the invention is suitable for industrial application and has strong thickening ability. The invention also discloses a preparation method of the silicon-containing supercritical CO2 dry fracturing fluid thickening agent at the same time.

The invention discloses a preparation method of efficient novel chicken ovalbumin chelated zinc. The preparation method comprises the following steps of (1) collecting chicken ovalbumin; (2) enzymolysis; (3) inactivation: after the enzymolysis is finished, heating the enzymatic hydrolysate for 20 minutes for enzyme inactivation treatment, and cooling to room temperature; (4) centrifuging; (5) chelating; and (6) concentrating and drying. According to the preparation method of the efficient novel chicken ovalbumin chelated zinc, the extraction and chelation processes are carried out at low temperature in the process, so that the functionality of a chicken ovalbumin (OVA) peptide chelated zinc coordination compound can be fully reserved; the chicken ovalbumin (OVA) peptide extracted by the method disclosed by the invention is high in purity, the chicken ovalbumin peptide and zinc ions can be fully chelated by adopting optimized chelation conditions and a specific chelation mass ratio, and the chelation rate is improved to the maximum extent; and according to the method, the raw material source requirement is not high, the dual effects of obtaining the biological activity of the chicken ovalbumin peptide and supplementing zinc can be achieved, and meanwhile, the additional value of egg white can be increased.

The invention relates to a play device (10) intended for juggling, comprising upper branches (21), and lower branches (22), an upper linking part (31), and a lower linking part (32), the upper and lower linking parts (31, 32) being aligned along a main axis (X), and a peripheral armature (40), of annular shape arranged between the upper linking part (31) and the lower linking part (32) along the main axis (X), said upper branches (21) and lower branches (22) forming an external envelope delimiting an interior space of the play device (10) and being configured to deform in such a way that the device (10) passes from an initial shape to a bowed shape when a user bounces the play device (10) on his body, and from the bowed shape to the initial shape after the bounce.

The invention relates to an efficient and safe method for producing L-phenylalanine by microbial fermentation, which belongs to the technical field of bioengineering. The concentration of ammonium sulfate and the type of organic nitrogen source were optimized, and the multi-stage L-tyrosine index feeding method was used to significantly increase the concentration of L-phenylalanine in the fermentation broth. The output of L-phenylalanine reached about 56 g/L. At the same time, the amount of ammonium sulfate, yeast powder and L-tyrosine is significantly reduced compared with common fermentation methods, which greatly reduces the production cost of L-phenylalanine.

The invention provides a valve core seat fixing structure of an extraction type faucet, and the extraction type faucet. The valve core seat fixing structure consists of a facet main body and a valve core seat body of the extraction type faucet in a cooperation manner; the faucet main body consists of a main body hollow pipe and a valve core assembling pipe, wherein the upper part and the lower part of the main body hollow pipe are opened; the sidewall of the main body hollow pipe is branched outwards to form the valve core assembling pipe; the valve core seat body consists of a valve core seatand a fixing seat which is integrated with the valve core seat; the angle formed by the valve core seat and the fixing seat is the same as the angle formed by the main body hollow pipe and the valvecore assembling pipe; a valve core main body is locked inside the main body hollow pipe by using a screw and a positioning pin; the valve core seat is exactly buckled inside the branch valve core assembling pipe, and thus a relatively-high-intensity assembly effect is realized.