13results about How to "Change physical properties" patented technology

The invention discloses a method for preparing high-purity estra-1, 3, 5 (10)-triene-3, 15 alpha, 16 alpha, 17 beta-tetrol (abbreviated as estratrol), which is characterized in that 3-hydroxy-17 beta-hydroxyestra-1, 3, 5 (10), 15-tetraene is used as a raw material, and the estratrol is prepared by three steps of phenolic hydroxyl group protection, asymmetric dihydroxylation and hydrolysis. According to the preparation method, 3-hydroxy-17beta-hydroxyestra-1, 3, 5 (10), 15-tetraene is taken as a raw material, 3-hydroxyl is protected by alkoxy-substituted benzoyl, asymmetric dihydroxyl reaction is carried out through catalytic oxidation of potassium osmate, double alpha-hydroxyl is introduced to 15, 16-positions, chemical reagents and catalysts with high cost are not needed in the preparation method, and the preparation method is simple and easy to implement. The dihydroxylation has the advantages of high stereoselectivity, easiness in purification and separation, mild reaction conditions and simplicity and convenience in operation, and high-efficiency preparation of high-purity estetrol (more than or equal to 99.5%) can be realized.

The invention discloses a doped nickel oxide-based material, a preparation method and application thereof, and a synthetic method of the doped nickel oxide-based material, and the synthetic method comprises the following steps: adding a nickel salt and an iron salt into an ethanol and oleylamine solution, fully stirring, transferring the solution into a reaction kettle for heating reaction, then carrying out centrifugal analysis and washing, and then calcining to obtain the doped nickel oxide-based material. And heating the obtained powder and thiourea in a tubular furnace to finally obtain the doped nickel oxide-based material. The synthesis method is mild in reaction condition and easy to operate, the electron and structural properties of nickel oxide are changed through doped metal iron and non-metal sulfur atoms, the conductivity of the system is improved, then the doped nickel oxide-based material can efficiently electrolyze water under the alkaline condition, and the method can be applied to an anode material of alkaline electrolyzed water.

The invention discloses xylooligosaccharide fruit juice popping capsules and a preparation method thereof. The xylooligosaccharide fruit juice popping bead comprises a compound colloid coating and a fruit juice core material, the coating comprises sodium alginate, carrageenan and guar gum, the fruit juice core material comprises green extract juice, white granulated sugar or high fructose corn syrup, a thickening agent, calcium lactate, purified water and xylooligosaccharide, and the coating and the core material are prepared by scientifically proportioning the raw materials, so that the raw materials synergistically play a role. And adopting a reverse spheroidizing technology to obtain the fruit juice popping bead. According to the xylooligosaccharide fruit juice popping bead provided by the invention, the popping bead contained in the popping bead is bright and glossy in color, round and full in ball shape, high in transparency, moderate in sour and sweet taste, appropriate in coat thickness, obvious in pulp popping feeling, rich in natural fruit juice and functional oligosaccharide, higher in nutritional value and beneficial in effect, and when the popping bead is matched with a fruit tea beverage for eating, the taste is unique; the tea is nutritional, healthy and suitable for people of all ages.

The utility model discloses a high-temperature efficient filling pipeline, which relates to the technical field of sealant filling and comprises a main pipeline and an outer-layer pipeline fixedly connected to the outer side of one end of the main pipeline for conveying materials through bolts. A plurality of discharge ports are fixedly connected with the main pipelines, and the plurality of main pipelines are arranged in a straight line; the spiral flow guide plate can guide the seam beautifying agent to advance in a spiral track, the spiral track can increase the flowing speed of the seam beautifying agent, so that the seam beautifying agent can rapidly flow into the filling nozzle, the filling work efficiency is improved, the spiral flow guide plate can also enable the seam beautifying agent to continuously roll during moving, the mobility of the seam beautifying agent is improved, and the filling efficiency of the seam beautifying agent is improved. The joint beautifying agent is prevented from being adhered to the inner wall of the main pipeline due to stagnation; the rhombic flow guide plate also plays a role in improving the flowability of the seam beautifying agent, and the seam beautifying agent passes through the channels from small to large when passing through the rhombic flow guide plate, so that the seam beautifying agent passes through the rhombic flow guide plate in a spraying state, and the flowing speed of the seam beautifying agent is increased.

This invention provides a device and method for simulating sediment resuspension under hydrodynamic action, relating to the field of sediment simulation. Addressing the problem that current wave-generating simulations of dynamic disturbances easily lead to the breakage of suspended particles, this invention simulates the action of water flow in a natural river by installing baffles within the water tank cavity to form multiple flow channels. The segmented circulation of water flow simulates the sediment resuspension process. When the grid blades agitate the water, the grid structure divides the water flow into multiple smaller streams, thus dispersing the force of the water flow. The originally concentrated impact force is dispersed to various parts of the grid, and when it is transmitted to the suspended particles, the magnitude and concentration of the force are significantly reduced, preventing the particles from breaking due to excessive external force.

The invention relates to a deep purification smelting method for high-purity steel, and relates to the technical field of high-purity steel smelting. The steel comprises the following chemical components in percentage by weight: 0.17%-0.18% of C, 0.65%-0.7% of Mn, 0.006%-0.01% of S, 0.006%-0.01% of P, 0.18%-0.23% of Si, 1.6%-1.65% of Cr, 1.5%-1.55% of Ni, 0.28%-0.29% of Mo, 0.1%-0.15% of Cu, 0.02%-0.025% of Al, 1.0 ppm-1.2 ppm of H, 10 ppm-15 ppm of O and 60 ppm-70 ppm of N. The method comprises the following operation steps: smelting crude molten steel in an electric arc furnace, performing vacuum refining, performing double-vacuum degassing, and performing gas protection die casting. The ferrocenyl intercalated talcum powder is prepared from talcum powder, gamma-mercaptopropyltrimethoxysilane, water, sodium p-styrenesulfonate, N-ferrocenyl-maleimide and sodium hydroxide, and the ferrocenyl intercalated talcum powder is prepared from the talcum powder, gamma-mercaptopropyltrimethoxysilane, water, sodium p-styrenesulfonate, N-ferrocenyl-maleimide and sodium hydroxide.

The invention discloses a silk-screen printing in-mold decoration method. The method comprises the following steps that firstly, a thin film is pretreated; 2, carrying out corona treatment on the pretreated film; 3, designing a plurality of layers of patterns, and manufacturing a corresponding screen printing plate; pouring printing ink into a screen printing plate according to the color requirement of the first layer, uniformly imprinting the printing ink to the surface of a film by using a scraper, and drying; according to the number of layers needing to be printed, the printing step of the first layer is repeated; wherein in the silk-screen printing process of a certain layer or several layers, corona treatment is carried out at the same time; and 4, cutting, forming, punching, inspecting, in-mold injection molding, film covering and inspecting are conducted on the printed film, and the decorative product is obtained. According to the in-mold decoration method disclosed by the invention, the ink can be more easily spread on the surface of a thin film, so that the adhesiveness of the ink is remarkably improved; meanwhile, the interaction force and the chemical bonding force between the ink and plastic film molecules are enhanced, and the firmness and the durability of printed patterns are ensured.

The invention discloses a manufacturing method of a tear-resistant and temperature-resistant CPP film for electronic screen protection, and relates to the technical field of CPP films for electronic screen protection, and the manufacturing method comprises the following steps: step 1, preparing raw materials, step 2, carrying out melt extrusion, step 3, stretching and shaping, step 4, carrying out surface coating, and step 5, cooling and coiling. The preparation raw materials comprise the following preparation materials in parts by weight: 50-60 parts of a polypropylene copolymer, 15-30 parts of a homopolymer, 18-28 parts of an antioxidant, 3-14 parts of an anti-ultraviolet agent, 3-7 parts of a temperature-resistant agent, 10-18 parts of an electrostatic agent, 2-8 parts of an anti-fogging agent, 6-12 parts of an anti-blocking agent and 4-9 parts of a slipping agent, the preparation materials are put into a melting machine and heated to 300-600 DEG C to be melted, the melted preparation materials are extruded through an extruder, and the polypropylene composite material is obtained. The method comprises the following steps of: coating a film with the width of 20-80cm and the thickness of 0.2-0.9 mm, coating the outer wall of the film with a surface coating which is polyurethane or polyvinyl chloride, and improving the tear resistance and temperature resistance of the film by using the surface coating.

The utility model discloses an electric thin-layer chromatography sample applicator, which relates to the technical field of analytical instruments and comprises a heating sample applicator, the upper surface of the heating sample applicator is fixedly connected with a supporting seat, the inner side wall of the supporting seat is fixedly connected with an auxiliary rod, the outer side wall of the supporting seat is fixedly connected with a motor, and the inner wall of the supporting seat is rotatably connected with a threaded rod. An output shaft of the motor penetrates through one end of the supporting seat to be fixedly connected with a threaded rod, the outer surface of the threaded rod is in threaded connection with a sample application arm, and the sample application arm is connected with a first electric push rod which is connected with a sample application nozzle. According to the utility model, a plurality of parallel strips can be formed by repeated sample application, an average value of detection results corresponding to the strips can be taken subsequently to reduce errors and improve the detection accuracy, and the heating temperature of the heater to the thin-layer plate can be adjusted through the controller, so that the performance of components of the same sample at different temperatures can be analyzed.

The present invention belongs to the field of genetic engineering technology, and specifically relates to a pectin methylesterase gene PagPME2 and an in vitro expression purification method and application thereof. The present invention clones the pectin methylesterase gene PagPME2 from 84K poplar for the first time, and uses molecular biology and biochemical techniques to prove that the PagPME2 gene does have the catalytic properties of pectin methylesterase, and is a new gene with pectin methylesterase function. The pectin methylesterase gene PagPME2 provided by the present invention encodes a pectin methylesterase enzyme activity of up to 24.69U, which can catalyze the demethylation reaction of galacturonic acid, the main component of pectin, and reduce the degree of methylation of pectin polysaccharides, thereby changing the physical and chemical properties of pectin molecules, and providing application value for subsequent in-depth exploration of the physicochemical properties of pectin methylesterase and its important role in food, medicine, textiles, biomass conversion, plant growth and development, and other fields.

The utility model discloses a kind of automobile accessory endurance test device, including workbench, the upper end of the workbench is rotatably connected with driving rod, the upper end of the driving rod is coaxially fixedly connected with brake disc, the upper end of the workbench is installed with brake pad, the brake pad is matched with brake disc, the lower end of the workbench is fixedly connected with motor. The utility model structure is reasonable, by setting special heat dissipation mechanism, using the power of motor, by the transmission of synchronous pulley, synchronous belt, vertical rod, bevel gear (first bevel gear, second bevel gear) and cross bar, drive fan blade rotation to produce airflow, brake disc and brake pad in testing process are cooled, effectively avoid the high temperature change brake disc and brake pad's physical property due to friction, ensure the accuracy of test result, improve the reliability of test data, can truly reflect the endurance condition of brake disc and brake pad in actual use.

The invention relates to the technical field of steel polishing, in particular to a bridge steel derusting and polishing device which comprises an outer frame and I-shaped steel and further comprises two sets of rotary clamping mechanisms symmetrically arranged; the working end of the adjusting mechanism is fixedly provided with a plasma generator, the output end of the plasma generator is communicated with a thin guide pipe, the outer side of the thin guide pipe is sleeved with a spirally-arranged electrified coil, and the density of the electrified coil is gradually increased from right to left; the supporting rod is fixedly installed on the plasma generator, and a laser transmitter is fixedly installed at the front end of the supporting rod; and the working end of the visual sensor faces one side of the I-shaped steel. The surface of the I-shaped steel can be polished in all directions, the polishing effect is better, the part with thick rust can be further polished in a reinforced mode, and stubborn rust on the surface of the I-shaped steel can be removed advantageously.

Provided are a method for evaluating a kneading state in which a change in physical properties of a kneading material can be grasped in an internal mixer including tangential rotors, a kneader, and a kneading adjustment method capable of obtaining desired kneading characteristics. The method for evaluating a kneading state is an evaluation method in an internal mixer 1 including a pair of tangential rotors connected by a pair of gears and rotated at different speeds by driving of an electric motor, in which the gears have the numbers of teeth of different integers that are not prime to each other, and spectrum analysis is performed on the basis of a kneading parameter detected at the time of kneading by sensors 10 and 11 included in the internal mixer 1 to evaluate a change in a predetermined frequency component.