69results about How to "Control activity" patented technology

The invention discloses a polymorphic nitro-compound fertilizer, relating to the technical field of agricultural fertilizers. The polymorphic nitro-compound fertilizer comprises the following raw materials in parts by weight: 30-150 parts of urea, 160-600 parts of nitramine phosphorus, 0-120 parts of ammonium sulfate, 180-250 parts of potassium sulphate, 100-200 parts of monoammonium phosphate and 1-10 parts of medium and micro fertilizers. The polymorphic nitro-compound fertilizer is produced by mixing, granulating and cooling the raw materials. The polymorphic nitro-compound fertilizer adopts scientific proportion, has complete nutrition, can continuously nourish crops at gradient so as to be more beneficial to the full absorption of the vegetable crops, and can remarkably promote the growth and high and stable yield of the crops, thus having strong market competitiveness.

The invention relates to a preparation method of fine elemental spherical metal powder particles for 3D printing, and belongs to the technical field of metal powder preparation. The preparation method comprises the following steps: adopting a high-purity metal block material as a raw material; carrying out arc evaporation under the atmosphere of inert gas, and simultaneously charging hydrogen to control the heat conduction and the activity of gas atoms of the metal, so that the gas atoms are cooled and deposited, and high-purity elemental nanometer metal powder particles are obtained; conducting aggregating granulation on the high-purity elemental nanometer metal powder particles, so that micron-sized elemental metal powder of relatively high density is obtained; and finally, conducting heat treatment on the micron-sized elemental metal powder obtained after granulation, so that functions of degumming and densified consolidation are realized, and the elemental metal powder particles of which the granularity, the sphericity, the liquidity and the oxygen content meet requirements of 3D printing are obtained. Compared with other technical methods, the preparation method has the advantages that the sphericity, the particle size distribution and the oxygen content of metal particles are highly controllable, the process is simple, and the cost is low.

The invention discloses a medical fertilizer with a function of preventing and treating root-knot nematode and a preparation method as well as application thereof. The medical fertilizer is prepared from the following components in parts by weight: 10 to 75 parts of major element fertilizer, 1 to 10 parts of medium trace element fertilizer, 1 to 10 parts of humic acid-containing raw material, 1 to 10 parts of chitosan oligosaccharide, 0.1 to 10 parts of abamectin, 0.1 to 10 parts of iprodione, 0.1 to 10 parts of fluopyram, 1 to 10 parts of surfactant and the balance of filler, wherein the parts of all the components are 100 parts. The fertilizers, biostimulants such as humid acid and the chitosan oligosaccharide as well as pesticides are compounded, so nutrition can be provided for crops, and root-knot nematode disease can also be effectively prevented and treated; time and labor are saved; the medical fertilizer is a novel environment-friendly product meeting the pesticide and chemical fertilizer zero growth requirement of the Ministry of Agriculture.

The invention discloses an acid electrode with good process performance, and belongs to the technical field of welding materials. The electrode consists of a core wire and a coating. The coating is characterized by comprising the following components in percentage by weight: 25 to 35 percent of titanium pigment and rutile, 15 to 20 percent of selected ilmenite, 5 to 10 percent of marble and dolomite, 5 to 10 percent of white mud, 3 to 8 percent of mica, 8 to 15 percent of potash feldspar, 4 to 7 percent of quartz sand, 8 to 13 percent of manganese-silicon, 2 to 4.5 percent of chalk, 1 to 1.5 percent of sodium carbonate, 3 to 5 percent of organic matters and 0.5 to 2 percent of rare earth magnesium powder, atomized iron powder and aluminum powder, wherein the grain size of each component is 40 to 200 meshes. Potassium sodium water glass is used as a bonding agent; the modulus is 2.4 to 2.7; and the Baume concentration is 36 to 39. After uniformly mixing the components of the coating of the electrode, adding the water glass and stirring uniformly to obtain a mixture, a carbon steel covered electrode is manufactured by extruding the mixture on a core wire H08A; or a low-alloy steel electrode is manufactured by extruding the mixture on a low-alloy steel core wire. The electrode of the invention has the characteristics of high arc reignition, slag detachability and all-position welding adaptability, and low cost of electrode raw material.

The invention relates to a nano silicon window layer with the gradient band gap characteristic, which is formed by depositing on the surface of a sample to be processed, wherein the surface of the sample to be processed is sequentially stacked with a metal back electrode M, a transparent conductive back electrode T1, an n-type Si-based thin film N and an intrinsic Si-based thin film I. The nano silicon window layer is formed by sequentially stacking a silicon thin film P1, a silicon thin film P2 and a silicon thin film P3. A preparation method of the nano silicon window layer comprises the following steps: depositing the p-type silicon thin film P1 with small thickness under a low glow power; then gradually raising the power and depositing the thin film P2; and finally, and completing the window layer P3 under a high power. The nano silicon window layer has the advantages that when the nano silicon window layer is applied to the window layer of an n-i-p-type silicon-based thin film solar cell, high electric conductance and wide band gap can be acquired, the bombardment of a solar cell i/p interface can be effectively reduced, the band gap matching between an intrinsic layer and the window layer can be implemented and the filling factor, the open-circuit voltage and the spectral response of the solar cell are obviously improved, so that the silicon-based thin film solar cell with high photoelectric conversion efficiency is obtained.

The invention discloses a respiratory training system and method based on bioelectric signals. The respiratory training system comprises a correct respiratory training module, a host control module, a myoelectricity acquisition module and a myoelectricity feedback module, wherein the correct respiratory training module is used for a user to carry out correct respiration essential training with the guidance of a respiration therapist; the host control module is used for receiving the myoelectric signals, carrying out signal processing and pattern recognition, controlling the myoelectricity feedback module to generate feedback stimulation, and meanwhile further controlling the correct respiratory training module to complete cycles of correct respiratory training; the myoelectricity acquisition module is used for recording and acquiring the electric signals of muscles related to respiration muscle groups of the user through electrodes and transmitting the electric signals to the host control module; the myoelectricity feedback module is used for receiving feedback control instructions sent from the host control module and offering related myoelectricity feedback stimulation to the respiration muscle groups of the user through the electrodes. According to the system and the method, the user can be effectively helped to learn, train, master and consolidate a correct respiration method in a biological feedback manner, so that the accuracy and the efficiency of respiratory training are improved.

The invention discloses a process for preparing UO3 through uranyl nitrate air-blast atomization dry pyrolysis denitration. According to the process, a designed and processed combustion chamber and a denitration reactor are adopted as main body equipment of uranyl nitrate pyrolysis denitration, a high-temperature high-speed gas generated from combustion of propane and excessive air is adopted as a heat source and an atomization gas source, and a uranyl nitrate liquid is subjected to drying dehydration and pyrolysis denitration. The process has the advantages of being short in process procedure, simple in equipment structure, stable in operation and high in UNH (Uranyl-Nitrate Hexahydrate) conversion rate, the prepared UO3 is uniform in granularity distribution and good in chemical reaction activity, and the like.

The invention belongs to the technical field of research and development of Vibrio alginolyticus phages and particularly relates to a wide-lytic-spectrum Vibrio alginolyticus phage, composition thereof, and a kit. The wide-lytic-spectrum Vibrio alginolyticus phage is Vibrio alginolyticus phage VAP7 collected under CCTCC NO: M 2018767. The inventio also discloses application of the Vibrio alginolyticus phage, a Vibrio alginolyticus phage composition, or a reagent or a kit containing the Vibrio alginolyticus phage or the Vibrio alginolyticus phage composition in the killing and/or prevention ofVibrio microbes. The Vibrio alginolyticus phage herein has a wide host range, has high toxicity to host bacteria under low concentration, can well propagate on nonpathogenic bacterial hosts, and is suitable for large-scale industrial production. Good strain resources can be provided for the application of phagotherapy.

The invention discloses a preparation method for modified palladium-carbon catalyst for Suzuki coupling reaction. The catalyst is composed of active carbon, and palladium and nickel loaded on the active carbon, wherein the mass percent of the palladium is 5-10%, and the mass percent of the nickel is 0.5-3%. The preparation method for the modified palladium-carbon catalyst for the Suzuki coupling reaction includes steps that 1, preparing nano-nickel sol; 2, preparing active carbon carrier; 3, preparing nickel-containing size; 4, preparing palladium-containing solution; 5, adding the palladium-containing solution to the nickel-containing size, preserving the heat, dipping and filtering to obtain a piece of filter cake; 6, performing reduction treatment, and washing to obtain the modified palladium-carbon catalyst. The modified palladium-carbon catalyst prepared by the method can be used for the Suzuki coupling reaction, and the modified palladium-carbon catalyst has advantages of high reaction activity, high selectivity, good stability and the like; the catalyst is easy to be separated from the product, the catalyst preparation technique is simple, the catalyst can be used repeatedly, the precious metal-palladium is easy to recycle, the pollution and energy consumption are reduced, and the economical benefit and environment significance are important.

The invention provides an ultrahigh specific capacity mesoporous Co3O4 nanosheet electrode material and a preparation method thereof. The preparation method comprises the following steps that 1) foam nickel is adopted to act as the three-electrode system of a working electrode, the mixed aqueous solution of Co(NO3)2 and KCl acts as an electrolyte solution, and a Co(OH)2 nanosheet is deposited on the surface of foam nickel through constant current so that a Co(OH)2 nanosheet precursor is acquired; and 2) the Co(OH)2 nanosheet precursor acquired in the step 1) is cleaned and dried, and then high temperature annealing is performed at temperature of 350-450 DEG C so that the mesoporous Co3O4 nanosheet electrode material is acquired. According to the preparation method of the ultrahigh specific capacity mesoporous Co3O4 nanosheet electrode material, the preparation method has the characteristics of being simple in technology, green and environment-friendly and low in cost, and the acquired Co3O4 nanosheet electrode material has relatively high specific capacity.

The invention discloses a high-lysis klebsiella pneumoniae bacteriophage RKP-KP-20007 and application thereof, the host of the high-lysis klebsiella pneumoniae bacteriophage RKP-KP-20007 is klebsiella pneumoniae, observation through an electron microscope shows that the head of the bacteriophage is an eicosahedron and is in stereo symmetry, the length of the head is 72.640 nm, the length of the tail of the bacteriophage is 177.797 nm, the bacteriophage is a long-tail bacteriophage family with the tail, and the preservation number is CGMCC No. 22495. The Klebsiella pneumoniae bacteriophage RKP-KP-20007 has a strong cracking effect on Klebsiella pneumoniae in a poultry breeding environment, can be used for efficiently treating Klebsiella pneumoniae diseases caused by pathogenic bacteria in poultry breeding, and can be used as a disinfectant. A bacteriophage source is provided for industrial, large-scale and programmed production of bacteriophages and treatment of poultry breeding bacterial diseases caused by klebsiella pneumoniae.

The invention discloses a 3D printing konjac glue gel stent, a preparing method and application. Konjac glue gel is methacrylated konjac glue gel. The preparing method includes the following steps ofmodifying a konjac glue gel raw material through methacrylic anhydride, conducting dialysis and freeze-drying to obtain methacrylated konjac glue gel powder, dissolving the methacrylated konjac glue gel powder in PBS with a photoinitiator to obtain hydrogel, combining the obtained hydrogel with chondrocyte for printing through a 3D-Bioplotter system, and then conducting ultraviolet crosslinking toobtain the konjac glue gel stent product. The stent combined with the chondrocyte has the potential for cartilage repair engineering. The 3D printing konjac glue gel stent has the effects of being good in biocompatibility, controllable in material performance, low in cost, wide in source and simple in operation.

The invention relates to the technical field of medical equipment, and discloses a medical surgical instrument safety device. The medical surgical instrument safety device comprises a casing. A fixingplate is fixedly connected to the inner wall of the casing, and a fixing block is fixedly connected to the front surface of the fixing plate. A limiting block is fixedly connected to the front surface of the fixing block, and a moving frame is slidably connected to the outer side of the fixing plate and located on the reserve side of the limiting block. A fixing rod is fixedly connected to the left side of the moving frame, and a safety rod is movably connected to the right side of the fixing rod. A moving rod is movably connected to the lower portion of the front surface of the moving frameand located below the fixing plate. A handle is movably connected to the inner wall of the casing. Through cooperative use of a rotating disc and the handle, the rotating disc is controlled to rotate;through cooperative use of the rotating disc and a second spring, the rotating disc can be stored in the second spring, the second spring is released to push the rotating disc to rotate, and automatic reset of the rotating disc is realized.

The invention relates to a browning-inhibiting leafy vegetable harvesting method and device. According to the browning-inhibiting leafy vegetable harvesting method and device, leafy vegetables are harvested through an intelligent harvesting tool; when the intelligent harvesting tool cuts off the stalk of a leafy vegetable, rapidly-absorbed antioxidant solution is released from the edge of the intelligent harvesting tool to the incision of the stalk of the leafy vegetable to prevent callus outflow of the leaf vegetable; during cutting, preservation covering liquid is released from the middle orthe back of the tool body of the intelligent harvesting tool to the lower portion of a vegetable body and builds films rapidly to cover the stalk and/or the stalk branches of the leafy vegetable; theintelligent harvesting tool comprises the tool body, a rapidly-absorbed antioxidant solution releasing unit and a preservation covering liquid rapidly releasing unit, wherein the rapidly-absorbed antioxidant solution releasing unit is arranged on the edge of the tool body, and the preservation covering liquid rapidly releasing device is arranged on the middle or the back of the tool body. The browning-inhibiting leafy vegetable harvesting method and device can achieve timely application of preserving agent during leafy vegetable harvesting to achieve control over leafy vegetable browning froma field harvesting stage, thereby effectively improving the freshness of the leafy vegetables and prolonging the shelf life of the leafy vegetables.

The invention discloses a semisynthesis method for 10-hydroxycamptothecin, which takes camptothecin as a raw material to prepare the 10-hydroxycamptothecin through the combination of catalytic hydrogenation and oxidation. The method is characterized by realizing a process of the combination of hydrogenation and oxidation, saving operation steps, in particular improving a catalyst by using a Pd/C catalyst containing 5 to 10 percent of palladium and recycling the catalyst, improving the manageability of the reaction by changing high-temperature reaction to normal-temperature reaction, and improving the selectivity of oxidation by applying oxidizers such as 2-iodoxybenzoic acid during the oxidation reaction. Compared with the prior art, the method has the advantages of hydrogenation reaction which is simple and convenient in operation and is low in cost, oxidation reaction which is high in selectivity, total yield of the two reactions of the whole production process which is increased to more than 85 percent, and suitability for industrial production.

The invention belongs to the technical field of feeding of animals, and in particular relates to a breeding method for green chickens. The breeding method for the green chickens comprises the following steps of: 1, morning feeding, namely generally, carrying out preliminary feeding at 5 to 7 o'clock in the morning, and adding much running water at the preliminary feeding to meet the water feeding amount of each chicken of 2 to 4 ml; 2, preliminary artificial driving, namely after the preliminary feeding is completed for 2 hours, carrying out artificial driving on the chickens to make the chickens do exercises fully; 3, intermittent feeding, namely feeding the chickens every 4 to 6 hours; 4, prolonging of the illumination time, namely prolonging the illumination time of the chickens with incandescent light bulbs in the late autumn and winter, to meet the time of 1.5 to 2.5 hours every day; 5, adding of green dietary supplements, namely adding the green dietary supplements at the second time every day, wherein the adding amount for each chicken is 2 to 4 g; and 6, secondary artificial driving, namely after feeding of the third time is completed every day, carrying out artificial driving on the chickens to make the chickens do exercises fully.

In order to quickly control the mobility of the moving dune caused by wind erosion, on the basis of establishing a physical sand barrier, fast-growing sand-fixing plants are selected, and a moving dune treatment method capable of quickly forming a sand-fixing effect is established. The physical sand barrier adopts straw checks made of straw, the straw checks gridding physical sand barrier is established on the surface of the moving dune, the specification of the straw checks is 1m * 1m, and the ground surface height of the straw checks is reserved to be 20-30cm. Mangosteen rock astragalus membranaceus which grows rapidly is selected as a main planting species, the planting spacing is 1m * 1m, and a field planting point is a central point of every grass square grid; according to the method, a herbaceous sand-fixing plant artemisia desertorum (artemisia desertorum is planted in a broadcast sowing manner, and the sowing rate is 750-1000g/mu) which grows quickly is selected as a configuration species. After the species combination sand stabilization mode is implemented, the vegetation coverage of 40% or above can be rapidly formed within 1-2 years, the fixing of the moving dune can be rapidly realized, the movement of the dune can be effectively controlled, and the method is a quick-acting moving dune rapid treatment technology.

The invention discloses a process for preparing propylene by combined reaction feeding and catalyst regeneration countercurrent contact dehydrogenation, wherein the process comprises catalytic dehydrogenation and catalyst cyclic regeneration. According to the process, raw materials are heated by a heater, and the heated raw materials enter a first reactor, contact a catalyst, and are subjected toa catalytic dehydrogenation reaction; after the reaction is performed for a period of time, the temperature is reduced, the reaction speed is reduced, the process gas discharged from the first reactorenters the subsequent reactor through the heater to react with a catalyst, and the catalytic dehydrogenation reaction is circularly carried out multiple times; and finally the product gas dischargedfrom the terminal reactor enters a separation system and is separated to obtain the final product propylene, wherein the to-be-regenerated catalyst participating in the reaction in the first reactor is collected through a catalyst collector, is lifted to a separation hopper through a fan, and is elutriated and burnt to obtain a catalyst capable of being recycled, then the catalyst is lifted and sent back to the terminal reactor, and then the catalyst sequentially flows into all stages of the reactors to participate in reaction, so that catalyst circulation is realized.