57results about How to "Reduce poison" patented technology

The invention relates to a microbial preparation containing arbuscular mycorrhizal fungi and application thereof, and belongs to the technical field of plant cultivation. According to the application disclosed by the invention, it is found that all of the glomus amarae, the rhizopus intro-rhizosporium, the glomus mosseae and the cyst macrosporium in the arbuscular mycorrhizal fungi can promote the growth of plants under the condition of double pollution of molybdenum and micro-plastics, and the plant height and the grain yield of the plants are effectively improved. Further experiments find that under the same condition, the effect is better than that of applying a single arbuscular mycorrhizal fungus inoculant when the near-phoma globosum, the rhizosporium intraradices and the glomus mosseae or the mixed inoculant of the near-phoma globosum, the glomus mosseae and the cyst macrosporium is applied. Furthermore, after beneficial bacteria and auxiliary materials are added into the mixed bacterial agent, the mixed bacterial agent has a better promoting effect on plant growth under the condition of double pollution of molybdenum and micro-plastics. The microbial preparation provided by the invention can reduce poison of microplastics and molybdenum to plants, so that the plants can normally grow under dual pollution.

The invention provides a method for reducing cadmium content in rice under cadmium stress, a rice adjusting method and application. By adding the exogenous water-soluble organic selenium into the cadmium-polluted farmland soil, the exogenous water-soluble organic selenium is proved to have the effects of promoting the growth of the rice under the cadmium stress and relieving the cadmium stress of the rice; the exogenous water-soluble organic selenium is beneficial for improving the activity of antioxidant enzymes of the rice and reducing oxidative damage, and has a positive effect on relieving cadmium toxicity of the rice; in addition, the exogenous water-soluble organic selenium is beneficial to reducing direct migration of cadmium from rice roots to brown rice and effectively reducing the biological enrichment coefficient of Cd in the brown rice; the exogenous water-soluble organic selenium can promote generation of iron plaque on the root surface of the rice in the mature period and form an effective barrier for Cd absorption of the rice, so that accumulation of cadmium in rice plants is reduced, and toxicity of cadmium to the rice is reduced.

The present invention discloses a slug repellent, comprising a liquid volatile chemical standard and a liquid auxiliary component, wherein the mass percentage of the liquid volatile chemical standard is 0.01%-1%. The liquid volatile chemical standard is one or more of hexanal, nonanal, decanal, and β-cyclocitral, and the purity of hexanal, nonanal, decanal, and β-cyclocitral is all greater than 97%. The auxiliary component is liquid paraffin. The present invention also discloses a method for preparing a slug repellent. The present invention adopts the above-mentioned slug repellent and its preparation method, which can reduce environmental pollution caused by chemical pesticides and solve problems such as toxicity to non-target organisms.

The application provides a method for inducing poly-podophylli rhizoma by using clump buds, comprising the following steps: S1, cutting stem segments from a podophylli rhizoma mother plant, soaking and cleaning to obtain explants; S2, disinfecting and cleaning the explants, inoculating into a clump bud induction medium to obtain podophylli rhizoma clump buds; S3, inoculating the clump buds into doubling liquid I, washing with a liquid clump bud induction medium after culture, and then transferring into doubling liquid II; S4, taking out the clump buds, cleaning, inoculating into a clump bud induction medium, and then inoculating into a bud proliferation medium; S5, waiting until 1-2 cm, screening out potential mutant strains through phenotypes, inoculating into the bud proliferation medium for subculture, and obtaining mutant plants; and S6, rooting culture of the mutant plants, and after root systems grow, planting and raising seedlings, and then poly-podophylli rhizoma plants are obtained. In the research, suitable concentration of colchicine is used for induction treatment twice, and through stage concentration switching and intermittent recovery strategies, the poly-ploid induction efficiency and explant survival are effectively considered.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The invention discloses a method for preparing hexamethylenediamine through nitrile hydrogenation, which comprises the following steps: carrying out hydrogenation reaction on adiponitrile to obtain reaction liquid, and then carrying out post-treatment to obtain the hexamethylenediamine, wherein the hydrogenation reaction system further comprises an adsorbent and mother liquor generated in the post-treatment process. According to the method, the mother liquor containing impurities such as azaheptyl ring Schiff base and nitrile hydrolysis ammoniation byproduct amide is returned to the reactor, and the adsorbent is added in the reaction, so that compared with a production process in which the mother liquor is not recycled, the content of the reaction byproduct AMCPA can be reduced to 5 mg / kg or below, and the polarogram value of the hexamethylenediamine product is smaller than or equal to 20 mmol IB / t-HMD.

The invention provides a production method of petroleum coke, and belongs to the technical field of petroleum coke. The method comprises the following steps: mixing a residual oil raw material with hydrogen, heating and reacting under the action of a catalyst and a desulfurizer to generate low-sulfur petroleum coke and an oil-gas mixture, removing hydrogen sulfide from the oil-gas mixture with water, and recovering hydrogen; the catalyst is a zirconium-based metal organic framework material which is modified by polydopamine loaded with rhodium, molybdenum and nickel and is provided with an amino group; the desulfurizing agent is a polydopamine modified zinc / manganese-based mesoporous molecular sieve. The production method of the petroleum coke is simple, mild in condition and relatively low in production cost, the catalyst and the desulfurizer can be repeatedly used, industrial mass production is easy to realize, and the method has a wide application prospect.

The application relates to the technical field of catalysts, and discloses a preparation method of a supported phosphine phenol nickel catalyst with a sulfonate functional group and application of the catalyst in olefin polymerization, wherein a sulfonate group (-SO 3‑ ) is permanently covalently combined on an aromatic ring of a phosphine phenol chelate ligand and is supported on the surface of a solid carrier such as silicon dioxide and magnesium oxide through ionic interaction; in a ligand synthesis stage, the sulfonate group is introduced into a ligand skeleton through a concentrated sulfuric acid sulfonation reaction to prepare a sulfonate-containing phosphine phenol ligand; the ligand is reacted with a nickel source to prepare a complex, and the target catalyst is obtained through supporting; the sulfonate group is fixed through a covalent bond, the structural stability of the catalyst is significantly enhanced, and the loss of an active component in a polymerization process is effectively prevented.

Embodiments of the present disclosure disclose air-nitrogen separation methods and systems. One embodiment of the method includes: controlling an air compression purification module to compress and purify air; controlling a membrane pre-separation assembly to preliminarily separate the purified compressed air; in response to a nitrogen purity being greater than or equal to a preset target nitrogen purity threshold, controlling a multi-stage separation and purification module to output nitrogen-rich gas; in response to the nitrogen purity being less than the preset target nitrogen purity threshold, controlling a deep purification assembly to perform deep purification processing on the nitrogen-rich gas; in response to the nitrogen purity being greater than or equal to the preset target nitrogen purity threshold, controlling the multi-stage separation and purification module to output deep-purified nitrogen gas; in response to the nitrogen purity being less than the preset target nitrogen purity threshold, controlling a precision separation assembly to perform precision separation processing on the deep-purified nitrogen gas, and controlling the multi-stage separation and purification module to output precision-separated nitrogen gas. The embodiment can meet the demand for nitrogen purity and reduce energy consumption.

This invention is a divisional application of Chinese invention patent application No. 202310608706.5, filed on May 28, 2023, entitled "Slow-Release Hydrogen Production Material Containing Nano-Silicon and Its Application in Aquatic Ecosystem Restoration". This invention discloses a slow-release hydrogen production material containing nano-silicon and its preparation method, belonging to the field of environmental protection technology. The invention involves sterilizing a 2-5% sodium alginate solution, cooling it to room temperature, adding 0.3-0.5% wt of nano-silicon to the sodium alginate solution, and stirring at 500-600 r / min at room temperature for 30-60 min to obtain a nano-silicon sodium alginate solution. The prepared nano-silicon sodium alginate solution is then added dropwise at a volume ratio of (1-5):1 to a 2-5% CaCl2 solution at a rate of 1 drop / second, and allowed to stand for 5-10 min to obtain the final product. The layered structure of this material allows the nano-silicon material to be uniformly distributed and stably produce hydrogen within the sphere.

The invention belongs to the field of preparation of diabetic complication relieving preparations, and particularly relates to a combined preparation for improving diabetic foot microcirculation and a preparation method of the combined preparation. The exosome containing rich growth factors and other active substances is obtained through stimulation of calcium gluconate and the like by taking platelet-rich plasma as a starting point, protamine nanoparticles are loaded, and the obtained bioactive substance has relatively strong antibacterial ability and can resist the development process of diabetic foot ulcer. According to the invention, bioactive glass, hydroxyethyl cellulose and the like are adopted to stabilize bioactive substances, the in-vitro life of the bioactive substances is prolonged, and modified carboxymethyl cellulose provides a better biodegradation effect. The prepared combined preparation is small in cell toxicity, good in antibacterial effect and capable of rapidly promoting wound healing, and microcirculation indexes show that the combined preparation can stimulate foot blood flow volume changes, improve foot artery blockage conditions and the like.

The invention discloses a platinum nanoparticle / cerium oxide catalyst as well as a preparation method and application thereof. The platinum nanoparticle / cerium oxide catalyst comprises platinum nanoparticles and cerium oxide nanosheets, the platinum nanoparticles grow in situ and are uniformly distributed on the cerium oxide nanosheets, and the platinum nanoparticle / cerium oxide catalyst has an icosahedron structure. The preparation method comprises the following steps: reacting a mixed reaction system containing a platinum-containing metal precursor, a cerium-containing metal precursor, a surfactant, a reducing agent and a solvent to prepare the platinum nanoparticle / cerium oxide catalyst. The preparation method is simple and convenient in process and easy to operate, the prepared platinum nanoparticle / cerium oxide catalyst is high and stable in catalytic efficiency and high in toxicity resistance when serving as a methanol oxidation catalyst, the problems that an existing precious metal platinum catalyst is high in cost, not ideal in activity and poor in stability can be effectively solved, and the catalyst is suitable for industrial production. The catalyst can be widely applied to catalytic methanol oxidation reaction.

The invention relates to the technical field of electrocatalysis, and discloses a hydroxide anode for preparing carbon monoxide through electrochemical reduction of carbon dioxide and a preparation method thereof.The hydroxide anode for preparing carbon monoxide through electrochemical reduction of carbon dioxide comprises a base material and a catalyst arranged on the base material, the catalyst comprises a cobalt-chromium-molybdenum alloy and a coating layer coating the outer surface of the cobalt-chromium-molybdenum alloy, and the coating layer comprises a carbon coating layer and tungsten oxide loaded on the carbon coating layer. The molybdenum element, the cobalt element and the chromium element form an alloy, and CO accumulation is reduced. The surface of the cobalt-chromium-molybdenum alloy is coated with the carbon coating layer, the conductivity of the hydroxide anode is improved, CO molecules are prevented from making contact with the surface of the alloy, in the long-term use process, the activity of a catalyst cannot be reduced due to CO poisoning, the hydroxide reaction can be efficiently conducted in the electrolysis process, the Faraday efficiency is improved, and the stability of the electrode is guaranteed. Tungsten oxide is loaded on the surface of the carbon coating layer, so that the activity and the stability are further improved.

The application discloses a separation and analysis method of enantiomers in acetyl tetrapeptide-3 and application thereof. The application adopts high performance liquid chromatography for separation and analysis, wherein a hydrophilic octadecylsilane bonded silica gel column is selected, and an organic acid solution with a concentration of 0.05-0.15% by volume is used to elute at a flow rate of 0.2-1.0 mL / min, so that acetyl tetrapeptide-3 and enantiomers thereof can be effectively separated and analyzed, and the separation degree reaches 1.5 or above. The application avoids using organic reagents, is environment-friendly and less toxic to human bodies; and the application avoids configuring special instruments, is simple to operate and low in cost.

The invention discloses a method for preparing (R)-styrene oxide based on epoxide hydrolase, which comprises the following steps: carrying out enzyme catalysis reaction in a biphase system under the action of epoxide hydrolase by taking a racemic ethylene oxide compound as a substrate to obtain (R)-styrene oxide and (R)-1-phenyl-1, 2-ethylene glycol or (S)-1-phenyl-1, 2-ethylene glycol; the temperature of the enzyme catalytic reaction is controlled to be 5-50 DEG C, and the reaction time is 2-24 hours. According to the method, the racemic ethylene oxide compound can be efficiently split with high stereoselectivity, the enzyme catalysis effect is good, and the optical purity of the product is high.

The present invention discloses a die-cast aluminum alloy and a preparation method and application thereof, and belongs to the technical field of metal materials. The die-cast aluminum alloy provided by the present invention is composed of the following components in mass percentage: 10.5-13% Si, 0.4-0.8% Fe, 0-0.45% Mn, 0.25-0.45% Mg, 0.06-0.1% Ti, 0.05-0.12% Zr, 0.005-0.01% B, 0.015-0.03% Sr, and the remainder is impurity elements and Al; the sum of the mass percentages of Mn and Fe is 0.7-0.9%. The present invention is based on Al-Si alloy, designs a higher Fe content, and prepares a die-cast aluminum alloy with good casting formability and high strength and toughness through the composition optimization design of the main alloy components of Si, Fe, and Mg and the trace elements of Ti, B, Sr, Zr, and Mn.

The utility model belongs to the technical field of carbon dioxide hydro-conversion, particularly relates to a membrane reactor for a reaction-separation coupling process, and aims to solve the problem of performance failure of the membrane reactor in a high-temperature environment in the background technology, the following scheme is provided: the membrane reactor comprises a reaction tube body, end covers are screwed on the outer walls of two ends of the reaction tube body, and the end covers are screwed on the outer walls of two ends of the reaction tube body; a product gas outlet is welded to one end of the outer wall of the bottom of the reaction tube body, a feed gas inlet is welded to the other end of the outer wall of the top of the reaction tube body, and a purge gas outlet is welded to the outer wall of one side of one end cover. The NaA molecular sieve membrane loaded by the ceramic hollow fiber carrier is adopted, a compact and defect-free zeolite membrane layer is formed through a multi-time in-situ growth process, the membrane can still keep a stable hydrophilic nano channel (the aperture is 0.4 nm) at the temperature of 300-400 DEG C and the high pressure of 4 MPa, water molecules are preferentially adsorbed and permeated, the thermodynamic equilibrium limitation is effectively broken, and compared with a traditional molecular sieve membrane, the membrane has the advantages that the membrane is simple in structure and convenient to use, and the cost is low. The thermal stability is obviously improved.

The application discloses a method for preparing L-serine by enzyme catalysis, and in-situ preparation of low-cost and high-activity THF is achieved by using a biological method or a chemical method; THF and enzyme inactivation are avoided by precisely controlling the flow addition of formaldehyde; the reaction system is optimized to promote the in-vivo circulation regeneration of THF, so that higher conversion efficiency is achieved with less THF feeding amount, and the use amount and cost of the expensive coenzyme THF are significantly reduced. The method is based on the optimization of the existing enzyme process, does not need complex equipment modification, and is easy to realize industrialized scale production.

The invention relates to the field of sealant, and particularly discloses an ultralow free isocyanate monomer radix asparagi polyurea sealant and a preparation method thereof. The sealant comprises a component A and a component B. The component A is a polyurea resin component, the component B is an isocyanate component, and the component B is prepared from the following raw materials in parts by weight: 85-95 parts of HDI tripolymer modifier, 0-1 part of a defoaming agent, 5-10 parts of an anti-settling agent and 0-5 parts of a silane coupling agent. The HDI tripolymer modifier is prepared from an HDI tripolymer and an HDI prepolymer; the NCO value of the HDI tripolymer modifier is 16 to 21 percent. No free isocyanate monomer is detected in the sealant, and on the premise that it is ensured that the sealant has the proper construction viscosity, the poison caused by the isocyanate monomer and the allergy condition of constructors are reduced to the maximum extent.

The invention provides carboxyl porphyrin-containing catalyst slurry as well as a preparation method and application thereof, and relates to the field of proton exchange membrane fuel cells. The catalyst slurry containing carboxyl porphyrin comprises a carboxyl porphyrin compound, a platinum-based catalyst, a perfluorosulfonic acid electrolyte, water and alcohol. The carboxyl porphyrin compound provided by the invention has a double-effect synergistic effect of an oxygen adsorption effect and a proton transfer effect in a platinum-based catalyst, so that the activity of a fuel cell is improved; and through interaction with a sulfonic acid group in an electrolyte, the carboxyl can weaken the poisoning effect of the sulfonic acid group on the platinum catalyst, so that the high activity of the platinum catalyst is maintained, meanwhile, proton transmission is accelerated, and the overall performance of the fuel cell is improved. According to the carboxyl metalloporphyrin-assisted platinum-based catalyst, the power density and the mass activity of a fuel cell are remarkably improved, the use amount of noble metal is reduced, and a wide application prospect is shown.

The present invention discloses a vibration-damping oxygen-supplying fresh-keeping gasket for airtight packaging and its application in fruit and vegetable logistics and after logistics, belonging to the technical field of packaging materials. The gasket of the present invention has a sponge-type vibration-damping material as an inner layer and a soft gel made of polyvinyl alcohol, polyvinyl pyrrolidone and water as an outer layer. The inner and outer layers can carry oxygen slow-release materials and volatile fresh-keeping substances together or separately according to needs, so as to achieve the four-in-one effects of vibration reduction, oxygen supply, fresh-keeping and slow release, and can achieve short-term and long-term release effects. Compared with the prior art, the first advantage is that the invention can extend the fresh-keeping time of fruits and vegetables without processing the fruits and vegetables; the second advantage is that the invention reduces the mechanical damage of fruits and vegetables in logistics and extends the fresh-keeping time of fruits and vegetables after logistics; the third advantage is that the invention can realize the airtight packaging of fruits and vegetables, reduce the interference of adverse external environment and microorganisms, and prevent water loss.

The present invention provides a high-temperature resistant high-entropy oxide coating and a preparation method and application thereof, belonging to the technical field of high-entropy alloys. After the substrate is subjected to surface ultrasonic cleaning treatment, a unit metal coating, a ternary metal coating and a high-entropy metal oxide coating are sequentially obtained by magnetic filtration cathode vacuum arc deposition, wherein the types of metal elements in the high-entropy metal oxide coating are not less than 5, and the content of each metal element is independently 8-30%. The magnetic filtration cathode vacuum arc deposition of the present invention can filter out large particles and neutral atoms generated by arcing, and the ionization rate of the deposited particles after magnetic filtration is close to 100%, thereby obtaining a pure plasma beam without large particles, and high-quality coatings can be deposited at low substrate temperatures. High-entropy metal oxides with adjustable element types and element contents are prepared by co-deposition magnetic filtration cathode vacuum arc, and the coating has high bonding strength, good compactness, and excellent high-temperature resistance.

The application discloses a removal device and removal method for organic matters in uranium purification conversion wastewater, and belongs to the field of uranium wastewater recycling. The application solves the problem that a small amount of organic phase contained in residual liquid of raffinate wastewater generated in a uranium purification process reduces the adsorption effect of exchange resin, and leads to a substandard treatment result of the wastewater. The application comprises a pre-separation tank, a vacuum separator, a pre-filter, a polymer separator and an adsorption filter which are sequentially connected through pipelines. A sewage pipeline is connected to the inlet end of the pre-separation tank. The outlet end of the pre-separation tank is further connected to a waste oil collection tank. A discharge port is arranged on the adsorption filter. Through the removal device and removal method for organic matters in uranium purification conversion wastewater, the content of organic phase in the uranium-containing wastewater is reduced to below 1 mg / L, the adsorption effect of the exchange resin is avoided to be reduced by the organic phase in the uranium-containing wastewater, the adsorption effect of the exchange resin on uranium ions in the uranium-containing wastewater is improved, and the uranium content of the uranium-containing wastewater is discharged below a standard value.

The invention discloses application of baicalin in relieving copper toxicity of duckweed, and belongs to the technical field of plant adversity physiology and heavy metal pollution remediation. Systematic research on the physiological regulation mechanism of baicalin on duckweed under copper stress innovatively discovers that the relative growth rate of duckweed can be remarkably increased through treatment of baicalin; according to the application, the chlorophyll synthesis level is effectively recovered, the photosynthesis inhibition effect caused by copper toxicity is fundamentally improved, it is proved that the threshold concentration for effectively relieving the copper toxicity is 400 [mu] M, the optimal action concentration window is 200-800 [mu] M, and the concentration interval can achieve synergistic antagonism on the toxicity of copper ions by adjusting the antioxidant metabolic pathway of duckweed. And a green and efficient new strategy is provided for heavy metal polluted water body remediation. The method is not only suitable for ecological restoration engineering of copper-polluted water areas, but also can be expanded and applied to cultivation of stress-resistant varieties of aquatic economic plants, and has important theoretical value and practical application prospect in improvement of heavy metal tolerance of stressed plants.

The present invention proposes a method for producing petroleum coke, which belongs to the technical field of petroleum coke. Residual oil raw material is mixed with hydrogen, and reacted under the action of a catalyst and a desulfurizing agent after heating to generate low-sulfur petroleum coke and an oil-gas mixture, and the oil-gas mixture is treated with water to remove hydrogen sulfide, and hydrogen is recovered; the catalyst is a zirconium-based metal organic framework material with amino groups modified by polydopamine loaded with rhodium, molybdenum and nickel; the desulfurizing agent is a zinc / manganese-based mesoporous molecular sieve modified by polydopamine. The method for producing petroleum coke of the present invention is simple, has mild conditions, and has low production cost. The catalyst and the desulfurizing agent can be reused, and it is easy to realize large-scale industrial production, and has broad application prospects.

The invention relates to an octafluorocyclopentene preparation device and a use method thereof.The device comprises a pyrolyzing furnace, a filter, a condenser, a water washing device, an alkali washing device, a water removing device and a deep cooling device which are connected through pipelines, a pyrolyzing pipe is arranged in the pyrolyzing furnace, a composite catalyst is placed in the pyrolyzing pipe, and the filter is arranged in the filter; the front end of the distillation tower is connected with a raw material gas tank and a purging gas tank through a three-way pipe, the rear part of the distillation tower is sequentially connected to a filter, a condenser, a water washing device, an alkali washing device, a polymerization inhibition device, a water removal device and a cryogenic device, and finally collected condensate is distilled. The device is simple and reasonable in overall structure, simple in preparation process, efficient and safe.

The invention discloses a method for rapidly detecting the activity of an environment-friendly fungicide. Specifically, the metabolic capability of a specific substrate is monitored and evaluated according to the characteristics of color change after tetrazole violet obtains electrons. The correlation between the bacterial activity and the change of the light absorption signal of tetrazole purple under 570nm is obtained by measuring the change of the light absorption signal of the bacteria under the condition of the tetrazole purple indicator. And establishing a standard curve of the tetrazole violet absorbance and the bacterial activity. And detecting the change of a bacterial absorption light signal under the tetrazole violet indicator of the environment-friendly microbial agent, and comparing the change with the standard curve to quickly obtain the activity of the environment-friendly microbial agent. The method for rapidly detecting the activity of the environment-friendly microbial agent has the advantages of simplicity, convenience, simplicity in operation, low toxicity, continuous monitoring and accuracy in multi-bacterium detection, and is an efficient solution for detecting the activity of the bacteria.

The invention discloses a selenium-rich planting method for dendrobium nobile, relates to the technical field of dendrobium nobile planting, and aims to realize selenium enrichment by using a selenate inorganic conversion mode based on an existing selenium-rich planting method for dendrobium nobile, so that soil and dendrobium nobile are easily damaged, and meanwhile, the stability and controllability of the whole selenium-rich planting process are general. The method comprises the following steps of organic selenium-rich base material preparation, organic selenium-rich base material processing, mixed planting, planting cycle detection and finished product picking. According to the method, by adopting a planting mode of decomposing the selenium-enriched yeast by the bacillus subtilis and realizing symbiosis of dendrobium nobile flora, the bacillus subtilis can perform secondary organic conversion treatment on the organic selenium-enriched yeast, and the converted organic selenium-enriched base material is lower in toxicity, higher in nutritional value and easier to absorb and convert by the dendrobium nobile; meanwhile, a symbiotic planting mode of the dendrobium nobile and the bacillus subtilis is adopted, the dendrobium nobile and the bacillus subtilis are mutually beneficial and symbiotic, the whole selenium-rich planting process is simple, safe, stable and high in controllability, and the dendrobium nobile and soil are not prone to being damaged.

This invention discloses an integrated ceramic catalytic filter tube, its preparation method, and its application, belonging to the field of industrial flue gas treatment. The integrated ceramic catalytic filter tube includes a ceramic filter tube substrate and a catalytic coating. The raw materials for the catalytic coating include a noble metal catalytic slurry and a vanadium-based catalytic slurry. The noble metal catalytic slurry includes a noble metal catalyst. The noble metal catalyst uses Nb-CeO2 / WO3 as a support and platinum and / or palladium as the active ingredient. The mass ratio between the active ingredient and the support is (0.1–0.15):1. The catalytic coating obtained by combining two different active catalytic slurries can compensate for each other's insufficient activity within different temperature ranges, improving the overall multi-pollutant removal efficiency of the catalytic coating. Furthermore, using a porous ceramic filter tube as the substrate material not only facilitates the distribution of the catalytic slurry but also helps retain particulate pollutants, achieving integrated denitrification and dust removal and efficient treatment of multiple pollutants in flue gas.

The present invention relates to a method for seed production based on transplanting redfin puffer reproductive stem cells into adult sterile recipients, belonging to the field of aquatic breeding. The method comprises the following steps: high-temperature culturing male redfin puffer fish after the spawning season, and injecting busulfan solution into the male fish gonads for multiple times during the high-temperature culturing stage to obtain sterile redfin puffer fish receptors; transplanting redfin puffer spermatogonial stem cells into the gonads of sterile recipients, and culturing the successfully implanted redfin puffer fish until the gonads mature to produce sperm carrying genes of excellent varieties for seed breeding. The method of the present invention can be used to quickly and efficiently deplete the number of reproductive cells in the gonads of adult male redfin puffer fish in the breeding period, and to perform reproductive stem cell transplantation on sterile recipients; the method provides a new method for preparing adult sterile receptors of marine fish, isotype transplantation, and shortening the germplasm creation cycle.