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

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 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.

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 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 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.