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16 results about "Stain" patented technology

A stain is a discoloration that can be clearly distinguished from the surface, material, or medium it is found upon. They are caused by the chemical or physical interaction of two dissimilar materials. Staining is used for biochemical research, metal staining, and art (e.g., wood staining, stained glass).

Corynebacterium glutamicum recombinant strain capable of producing high-yield L-leucine, and construction method thereof

InactiveCN109294966AEfficient synthetic pathwayLow content of by-productsBacteriaMicroorganism based processesBiotechnologyNad dependent
The invention discloses a Corynebacterium glutamicum recombinant strain capable of producing high-yield L-leucine, and a construction method thereof, and belongs to the field of genetic engineering. According to the present invention, the NADP-dependent branched-chain amino acid transaminase in Corynebacterium glutamicum is replaced with NAD-dependent leucine dehydrogenase (LeuDH) derived from B.sphaericus by using a genetic engineering method, such that the new efficient L-leucine synthesis pathway is constructed, the disadvantages of excessive accumulation of NADH in the Corynebacterium glutamicum L-leucine producing bacteria and insufficient supply of NADPH are solved, the L-leucine synthesis ability in the recombinant strain is enhanced, and the NADPH accumulation ability of the strainis improved; the shake fermentation experiment results show that the L-leucine accumulation of the recombinant strain achieves 16.7 g.L<-1> and is higher than the L-leucine accumulation of the starting stain of 13.2 g.L<-1>, and the maximum specific growth rate of the recombinant strain is 0.23 g.L<-1>.h<-1>, and is higher than the maximum specific growth rate of the recombinant strain of 0.18 g.L<-1>.h<-1>; and the L-leucine synthesis pathway in Corynebacterium glutamicum is successfully modified, the disadvantage of the intracellular cofactor imbalance is improved, and the new idea is provided for the breeding of high-yield L-leucine production bacteria.
Owner:JIANGNAN UNIV

Washing agent

ActiveCN104946417ANo harmOrganic detergent compounding agentsSurface-active detergent compositionsEngineeringStain
The invention discloses a washing agent. The washing agent comprises, by mass, 10% to 50% of emulsified detergents, 10% to 30% of penetrants and 20% to 40% of wetting agents. Compared with the prior art, the washing agent has the advantages of being environmentally friendly, efficient and capable of being used for soaking ultrasonic wave oil removing washing of various materials, having remarkable effects on various stubborn oil stains and being capable of being completely degraded and free of injuries in the human body and damage to the environment.
Owner:SHENZHEN HENGWEIXIANG SCI & TECH CO LTD

Chromium-ion-free zinc-nickel alloy automatic electroplating process

InactiveCN106637315AGood lookingMeet environmental protection requirementsElectrochemical responseNickel alloy
The invention discloses a chromium-ion-free zinc-nickel alloy automatic electroplating process. The chromium-ion-free zinc-nickel alloy automatic electroplating process comprises the following steps: pretreatment: removing oil stain and rust on the surface of a rubber-metal composite part or a metal part to be plated in such modes as pickling, electrolytic degreasing, and high-temperature degreasing; electroplating: utilizing electrochemical reaction to enable two metal ions (zinc and nickel) to be co-deposited on the metal surface to form a plating; confining: enabling a confining liquid to infiltrate the gap of the plating to form an organic or inorganic protective layer on the surface of the plating, wherein the confining temperature is 50-80 S, and the temperature of the confining liquid is 40-50 DEG C; blow-drying; drying; and packaging. By adoption of the chromium-ion-free zinc-nickel alloy automatic electroplating process, as the surface of the electroplating does not contain chromium ions, the requirement for environmental protection is satisfied; after electroplating, passivation is not needed, the anti-corrosion performance is good, long-time use can be realized, and the chromium-ion-free zinc-nickel alloy automatic electroplating process can guarantee favorable appearance of the plating; as passivation is not needed, the operation is simple, additional treatment is not required and the production efficiency is high; and the obtained plating has no red rust under neutral salt spray for 1,000 h.
Owner:ZHUZHOU TIMES NEW MATERIALS TECH

Bullet train bogie framework cleaning equipment

The invention relates to the field of China railway high-speed train overhauling and maintaining, and discloses bullet train bogie framework cleaning equipment. The bullet train bogie framework cleaning equipment comprises a conveying unit, a pre-spray-washing unit, a scrubbing unit, a cleaning and drying unit and a visual detecting unit. The conveying unit is used for bearing a bullet train bogieframework, the pre-spray-washing unit is used for spraying surface stains of the bullet train bogie framework, and the scrubbing unit is used for scrubbing the surface stains of the bullet train bogie framework. The cleaning and drying unit is used for flushing scrubbing solutions left on the surface of the bullet train bogie framework, and drying the bullet train bogie framework. The visual detecting unit is used for recognizing the residual stain positions and cable components of the bullet train bogie framework. The bullet train bogie framework cleaning equipment is high in cleaning efficiency, good in cleaning effect, safe and environmentally friendly, the labor cost of cleaning is reduced, omnibearing covering cleaning of the bullet train bogie framework can be achieved, the stubbornstains can be cleaned repeatedly and emphatically, and damage and water input of cables and other critical components can be effectively avoided.
Owner:BEIJING RAILWAY INST OF MECHANICAL & ELECTRICAL ENG

Conductive high-temperature resistant ultraviolet curing coating and method for preparing same

InactiveCN104559372AHigh hardnessShort curing timeAnti-corrosive paintsElectrically-conductive paintsTO-18Wear resistant
The invention discloses a conductive high-temperature resistant ultraviolet curing coating and a method for preparing the same. The method comprises the following steps: weighing 100 to 120 parts of matrix resin, 72 to 92 parts of active monomer and 10 to 13 parts of photoinitiator in parts by weight, mixing and stirring at a high speed; heating to a temperature of 125 to 135 DEG C, stirring for reaction for 1 to 2h, adding 22 to 27 parts of a wear-resistant agent, 15 to 22 parts of a conductive agent, 15 to 20 parts of pollution-resistant auxiliaries, 10 to 20 parts of a dispersant, 15 to 18 parts of a flatting agent and 11 to 16 parts of a thickener, stirring for reaction for 2.5h, lowering the temperature to 75 DEG C and reacting for 1.5h, and lowering the temperature to the room temperature to obtain the finished product. The conductive high-temperature resistant ultraviolet curing coating is short in curing time, high in hardness, and excellent in wear-resisting property, and is not pulverized and does not fall off at the temperature of 600 DEG C; moreover, the conductive high-temperature resistant ultraviolet curing coating has an excellent chemical resistant property and stain resistance. The method is small in step and easy to operate.
Owner:HUZHOU NANXUN SHUANGLIN ZHENSEN WOOD PROCESSING FACTORY

Oil stain isolation device facilitating oil stain collection and used for flat wire production

PendingCN112941764AAnnealed thoroughlyPrevent take outTextile treatment machine arrangementsLiquid/gas/vapor removal by scrapingOil canRotational axis
The invention discloses an oil stain isolation device facilitating oil stain collection and used for flat wire production. The oil stain isolation device comprises a device main body and a first rotating shaft; the first rotating shaft is fixed above the inner wall of the left side of the device main body; the surface of the first rotating shaft is connected with a device upper cover; an upper cover handle is fixed to the upper portion of the device upper cover; first rollers are fixed to the upper portions of the two side walls of the device main body; second motors are fixed to the outer sides of the first rollers; springs are fixed to the inner sides of the first rollers; second rotating shafts are fixed to the tails of the springs; a fan is fixed to the surface of a fixed frame; a duckbilled spray head is arranged on the inner wall of the right side in the device main body; and an oil pump is arranged in the device. Used oil can be pumped into a copper pipe and cooled by the external fan, and then the duckbilled spray head sprays the oil into the device, so that the oil can be repeatedly used, and the pollution caused by oil dirt to the environment is reduced while the cost is reduced; and the device is more practical.
Owner:句容建荣汽配有限公司

Aluminum alloy EBSD sample alkaline electrolysis polishing liquid and preparation method and electrolysis polishing method thereof

ActiveCN108505107AHigh calibration rateEasy to polishElectrolysisSodium silicate
The invention discloses aluminum alloy EBSD sample alkaline electrolysis polishing liquid and a preparation method and electrolysis polishing method thereof and belongs to the technical field of analysis. The aluminum alloy EBSD sample alkaline electrolysis polishing liquid and the preparation method and electrolysis polishing method thereof are suitable for aluminum alloy samples prepared by different processingmethods, operation is convenient, and the cost is low. The electrolysis polishing liquid comprises 40-100 g/L of sodium ethoxide, 15-25 g/L of sodium silicate, 10-20 g/L of sodium metaaluminate, 8-12 g/L of glucose, and water. The preparation method of the alkaline electrolysis polishing liquid comprises the steps that the water is heated to be 50 DEG C, and the sodium ethoxide, the sodium silicate, the sodium metaaluminate, the glucose and the water are added. The electrolysis polishing method comprises the steps of (1) mechanical grinding and polishing, (2) oil stain removaltreatment, and (3) electrolysis polishing. According to the aluminum alloy EBSD sample alkaline electrolysis polishing liquid and the preparation method and electrolysis polishing method thereof, theproblem that the preparation polishing effect of traditional aluminum alloy EBSD samples is poor is solved.
Owner:ZHEJIANG HAILI GROUP

Anti-oxidation surface treatment method for conductive bar

The invention relates to the field of conductive bar production, in particular to an anti-oxidation surface treatment method for a conductive bar. The anti-oxidation surface treatment method comprisesthe following steps of 1, soaking the conductive bar to be treated in a cleaning solution to remove oil stains and rust on the surface of the conductive bar; 2, cleaning the cleaned conductive bar with deionized water, and wiping the conductive bar with a wiping cloth; 3, placing the dried conductive bar in a solvent containing an antioxidant, heating the conductive bar to 50-200 DEG C, and carrying out sealed and pressurized reaction; and 4, after the treatment is finished, cleaning and then drying the conductive bar at a low temperature. By adopting a chemical agent blending, heating and pressurizing treatment method, the process is simple, little pollution is caused, and the process is controllable.
Owner:YANGZHOU HONGSHUN ELECTRIC CO LTD
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