49results about How to "Solve the problem of poor stability" patented technology

The invention belongs to the technical field of oxygen ion-electron mixed conductor oxygen-permeable membranes and particularly relates to a titanium-based perovskite ceramic oxygen-permeable membranewith no cobalt or iron and a preparation method and application thereof. The titanium-based perovskite ceramic oxygen-permeable membrane herein is made from materials with no cobalt or iron and has achemical composition expression of A1-xTi1-yByO3-delta, wherein A is selected from one or any of La, Y, Pr, Gd, Sm, Ba, Sr and Ca, and B is selected from one or any of Mg, Al, Er, Y, Gd and Zr, with0< / =x< / =0.2 and 0< / =y< / =0.2. The titanium-based perovskite ceramic oxygen-permeable membrane with no cobalt or iron provided herein is excellently stable in the strict working conditions, such as hightemperature, vapor, hydrogen and methane, is suitable for long-term stable operation under reaction conditions, is suitable for preparing high-purity hydrogen by hydrolysis of oxygen-permeable membranes, and is also suitable for producing hydrogen by coupling hydrolysis of a membrane reactor and producing synthetic gas from methane.

The invention provides a foaming agent for improvement of slag oil of a soil pressure balance shield and a preparation method thereof. The foaming agent for the improvement of the slag oil of the soilpressure balance shield is prepared from the following components in percentage by weight: 4% to 8% of alpha-alkenyl sodium sulfonate, 8% to 12% of lauryl sodium sulfate, 3% to 5% of alkylphenol polyoxyethylene, 0.05% to 0.2% of xanthan gum, 1% to 4% of coconut oil fatty acid diethanolamide, 1% to 3% of sodium gluconate, 0.5% to 2% of polyethylene oxide, 1% to 2% of polyaspartic acid, and the balance of water. The foaming agent has the advantages that by adopting the alpha-alkenyl sodium sulfonate, the lauryl sodium sulfate and the alkylphenol polyoxyethylene to prepare the foaming agent, thefoaming ability is enhanced under the compounding and cooperation function of the alpha-alkenyl sodium sulfonate, the lauryl sodium sulfate and the alkylphenol polyoxyethylene; the foaming time is greater than 30 times; by adopting the coconut oil fatty acid diethanolamide to enhance the surface action force of the air foam through cooperation, the stability of the foam under the high-speed shearing function of a knife disc is improved; the pressure fluctuation of a soil bin is reduced; the stability of the excavated surface of the shield is improved.

The invention relates to immobilized lysine decarboxylase, a preparation thereof, a 1, 5-pentane diamine preparation method and the prepared 1, 5-pentane diamine. The invention specifically relates toimmobilized lysine decarboxylase comprising an aldehyde group-modified polymer carrier and lysine decarboxylase, and a method for preparing immobilized lysine decarboxylase by the aldehyde group-modified polymer carrier; a method for preparing 1, 5-pentane diamine by the immobilized lysine decarboxylase, and the prepared 1, 5-pentane diamine thereof. The immobilization method has high enzyme immobilization efficiency and good stability in use, improves the use efficiency of enzyme, solves the problem of poor use stability of free lysine decarboxylase (cells) in traditional processes, greatlyreduces the use cost of the carrier and the biological production cost of 1, 5-pentanediamine, simplifies the separation step of 1, 5-pentane diamine solution and enzyme, increases the degree of automation of the production of 1, 5-pentane diamine, and promotes the process of industrialization of biological production of 1, 5-pentanediamine.

The invention discloses a multi-chamber aluminum electrolysis tank and a bus system thereof. Anodes and cathodes are arranged in the multi-chamber aluminum electrolysis tank in an alternating manner in the horizontal direction. Platy electrode structures of the same size are adopted in the anodes and the cathodes. The anodes and the cathodes are vertically parallel to each other and fixed into theelectrolysis tank. At least two electrolysis chambers are formed between the adjacent anodes and the cathodes. Anode guide rods of all the anodes in the aluminum electrolysis tank are connected in parallel and collected to the same anode bus. Horizontal flow collecting steel bars of all the cathodes in the aluminum electrolysis groove extend out of the same side of the aluminum electrolysis tankand are connected in parallel and collected to a stand column bus through cathode buses. The stand column bus is connected to a power source negative pole or connected into an anode bus of the next electrolysis tank in series. The anode bus is connected to a power source positive pole or connected into a stand column bus of the former electrolysis tank connected in series. The aluminum electrolysis tank has great significance for energy conservation and economic operation, and guarantee can be provided for deep energy conservation and environmental protection.

The invention relates to a high-speed bead planting machine which comprises a rack frame, a lifting mechanism, a mounting plate and an air distribution mechanism are mounted on the rack frame, the high-speed bead planting machine further comprises a lossless material distribution assembly, a bead taking assembly and a bead planting assembly, the bead taking assembly comprises a first driving motor, a base and a bead taking disc, and a stock bin for containing blasting beads is formed between the base and the bead taking disc. A discharging port in the lower end of the lossless material distributing assembly penetrates through the base and is communicated with the material bin, the base is provided with an expansion channel for decelerating blasting beads in the material bin, the edge of the bead taking disc is provided with a material storage channel, material stirring teeth for accelerating the blasting beads and an air passing channel for disturbing blasting bead air blowing, and the bead planting assembly comprises a second driving motor, an air distribution disc and a bead planting disc. The edge of the bead planting disc is in butt joint with the edge of the bead taking disc to conduct blasting bead transferring. The machine has the advantages that the improved blasting bead taking assembly can effectively damage the bridging phenomenon of blasting beads during high-speed operation, the domestic blasting beads can be guaranteed to be used for production through lossless material distribution and the improvement of the material distribution protection plate, and 420 m / min ultra-high-speed production operation can be achieved.

The invention relates to a preparation method of high-stability liquid blueberry anthocyanin, which belongs to the field of food processing. The preparation method includes the following steps: at room temperature, uniformly mixing graphene oxide and chitosan in an MES buffer solution, then successively adding EDC and NHS, and reacting to obtain a first solution; adding dried blueberry anthocyaninpowder in the first solution, adjusting the pH to 4.5-5, and uniformly mixing to obtain a second solution; and processing the second solution at 350-420 MPa and 2-4 DEG C, thereby obtaining high-stability liquid blueberry anthocyanin. With the dried blueberry anthocyanin powder as raw material, the method can improve the stability of blueberry anthocyanin in the process of processing and production by adding the graphene oxide and chitosan combined compound as an anthocyanin stabilizer.

The invention provides a pipette tip. The pipette tip comprises a first pipette tip body (1) and a second pipette tip body (2), wherein the first pipette tip body (1) comprises a sharp liquid absorbing end (11), a tubular liquid storage cavity (12) and a tip tail part (13) which are sequentially communicated; the top of the tip tail part (13) is sealed, and a plurality of filter holes (3) are formed in the side face of the tip tail part (13); the second pipette tip body (2) comprises a cover body (21), a filter layer (22) and connecting grooves (23); the cover body (21) is arranged outside the tip tail part (13) of the first pipette tip body (1) in a sleeving manner; the filter layer (22) is arranged between the connecting groove (23) and the cover body (21); two grooves are formed in two sides of the tail end of the second pipette tip body (2), and the connecting grooves are embedded into the grooves. The pipette tip can be used for effectively solving the problems of sealing performance between the pipette tip and a pipette socket and poor use stability of the pipette, and can be used for effectively preventing pollution by setting double filter layers.

The invention discloses a flexible display device, comprising: a main structural part, a locking part, the main structural part has a hollow space, and the locking part is connected with the main structural part in the hollow space; a flexible display panel, a supporting structural part, a supporting The structural member is rotatably connected to the first side wall of the main structural member, and the supporting structural member has a supporting state. In the supporting state, the first end of the supporting structural member is detachably connected with the locking member in the hollow space, and the supporting structural member The second end protrudes from the main structure to support the stretched flexible display panel. The flexible display panel in the stretched state is stably supported by setting the supporting structure and the locking member, which is convenient for placing or holding, and solves the problem of poor stability in the use of the curly screen, making it easy to carry and use.

The invention relates to immobilized lysine decarboxylase, its preparation, 1,5-pentamethylenediamine preparation method and product. It specifically relates to an immobilized lysine decarboxylase comprising a diazo-modified polymer carrier and a lysine decarboxylase, and a method for preparing an immobilized lysine decarboxylase with a diazo-modified polymer carrier; and A method for preparing 1,5-pentanediamine by immobilized lysine decarboxylase and the prepared 1,5-pentanediamine. This immobilization method has high immobilization efficiency of enzyme, good use stability, improves the use efficiency of enzyme, solves the problem of poor stability of free lysine decarboxylase (cell) in traditional technology, and greatly reduces the use cost and cost of the carrier. The production cost of 1,5-pentamethylenediamine by biological method simplifies the separation steps of 1,5-pentamethylenediamine solution and enzyme, increases the automation of 1,5-pentamethylenediamine production, and promotes the production of 1,5-pentamethylenediamine by biological method The industrialization process of pentamethylenediamine.

The invention discloses a wall type aluminum electrolysis cathode. The cathode is of a plate-shaped structure and is fixedly arranged at the bottom of a tank chamber of an aluminum electrolysis tank in the vertical direction, the cathode and an anode which is also of a plate-shaped structure partition the interior of the aluminum electrolysis tank into at least two electrolysis chambers distributed in the horizontal direction, and the cathode comprises a cathode carbon block and a cathode conducting steel rod. According to the wall type aluminum electrolysis cathode, the cathode can partitiona fiercely fluctuating melt area in the aluminum electrolysis tank into multiple oxidizing chambers capable of continuously running together with the aluminum electrolysis anode, influences of disturbance currents on the electrolysis tank magnetofluid stability are thoroughly eliminated, and the wall type aluminum electrolysis cathode is a novel cathode structure capable of ensuring deep energy conservation and environmental protection of multi-chamber continuous aluminum electrolysis.

A compound isopropylphenol injection containing local anesthetic contains proportionally isopropylphenol, the local anesthetic chosen from procaine, lidocaine, etc, the refined plant oil for injection, emulsifier, isotonic regulator, antioxidant, pH regulator and the water for injection. Its preparing process is also disclosed.

A process for preparing Calcium-enriched whole egg beverage similar to milk in appearance includes such steps as ashing egg shells, adding water, adding acid for neutralizing, filtering, enzymolyzing whole egg liquid by papain, deactivating enzyme, dispensing, homogenizing, pouring in containers, sealing, sterilizing and cooling.