50results about How to "Regulation content" patented technology

The invention relates to the technical field of planting, in particular to an efficient planting method for mulberry. The method comprises the following steps of seedling growing, transplanting, pest control and field management. By adopting the planting method, planted mulberry is high in disease resistance and insect resistance, high in yield and strong in pesticide effect, compared with the acre yield of mulberry planted through a traditional method, the yield of folium mori can be increased by 28% or above, the yield of mulberry fruits can be increased by 13.2% or above, and due to the planting method, the acre yield of mulberry trees is effectively improved; the survival rate of seedlings is increased by 9.4% compared with a traditional method; on the basis of the scientific planting method, effective components of mulberry trees can be effectively improved, the pesticide effect is improved, and the requirement of the current market for a large number of mulberry trees is met.

The invention relates to laser cladding powder for 30CrMnSiNi2A steel and a preparation method. The laser cladding powder is prepared from the following components in weight percent: 0.8% to 1.0% of Cr, 0.75% to 1.10% of Mn, 0.65% to 1.10% of Si, 2.0% to 3.2% of Ni, 0.16% to 0.22% of C, 0.15% to 0.20% of Cu, 0.015% to 0.020% of P, 0.01% to 0.015% of S, 0.001% to 0.015% of rare earth and the balance of Fe. The invention further provides the preparation method of the laser cladding powder, the laser cladding powder is exclusively used in a laser cladding technique of the 30CrMnSiNi2A steel, excellent bonding strength and low metallurgical defects and dilution rate of a cladding interface are guaranteed, the toughness of a cladding layer is increased, the wettability of the cladding powder is improved, the cracking of the cladding layer is inhibited, and the crack growth rate is reduced.

The invention relates to cadmium sulfide with adjustable hexagonal phase and cubic phase content, and a preparation method and applications thereof. The microtopography of the cadmium sulfide is of a sheet structure; the length of the cadmium sulfide nanometer sheets ranges from 25 to 50nm, and the width ranges from 8 to 15nm. According to the preparation method, cadmium chloride hemipentahydrate and sublimed sulfur are taken as raw materials, deionized water and diethylenetriamine are taken as solvents, solvothermal method is adopted to prepare cadmium sulfide, and the hexagonal phase and cubic phase content of cadmium sulfide is adjusted and controlled via adjusting and controlling the molar ratio of cadmium chloride hemipentahydrate to sublimed sulfur, so that optimization of the capability of the prepared cadmium sulfide in hydrogen production via photocatalytic decomposition of water with visible light is realized.

The invention discloses a method for preparing an aluminum-nitrogen co-doped diamond-like composite film. Two dual-excitation energy source cathode arc coating devices with different characteristics are configured by adopting an ion source-assisted cathode arc deposition technology, one dual-excitation energy source cathode arc coating device adopts a direct-current arc evaporation cathode sourceand is used for installing an aluminum target, and the other dual-excitation energy source cathode arc coating device adopts a pulsed arc evaporation cathode source and is used for installing a graphite target; nitrogen gas is taken as reaction gas in the deposition process, nitrogen gas (N2) is ionized into ionic nitrogen (N<+>) through an ion source, the aluminum target installed on the direct-current arc evaporation cathode source and the graphite target installed on the pulsed arc evaporation cathode source achieve sputtering deposition on the surface of a workpiece by rotating the workpiece, and the component-controllable aluminum-nitrogen co-doped diamond-like composite film is obtained. According to the method for preparing the aluminum-nitrogen co-doped diamond-like composite film,the film is doped with N in an ion mode, and hard aluminum nitride (AlN) and metal Al nanocrystalline particles are promoted to be formed in the diamond-like composite film; and the diamond-like composite film has the advantages of being smooth in surface, high in hardness and toughness and low in stress.

The invention discloses an in-suit loaded type foam microporous precious metal catalyst, and a preparation method thereof. According to the preparation method, an amorphous alloy wire with a cross section area of S0 (or a woven product of the amorphous alloy wire) is taken as a precursor, and is immersed in an acid solution for corrosion of the amorphous alloy at certain depth of the external surface of the amorphous alloy wire through dealloying reaction so as to obtain a nanometer porous precious metal catalytic layer, and at the same time, a amorphous wire core with a cross section area ofS(S<S0) is maintained as a structure support, so that the in-suit loaded type foam microporous precious metal catalyst with a foam microporous precious metal annular external shell catalytic layer andan internal amorphous wire core composite structure. The preparation method is low in cost, is simple in operation, and is controllable, and is capable of producing the precious metal catalyst material with an excellent structure and excellent performance.

The invention discloses a catalyst for preparing low-carbon alcohol through carbon dioxide conversion and a preparation method and application thereof, and belongs to the technical field of carbon dioxide resource utilization. The preparation method comprises the following steps: carrying out mechanical ball milling on a cobalt simple substance, a cobalt compound and / or a catalyst carrier which are uniformly mixed, and then carrying out heat treatment to obtain a catalyst product after the heat treatment is completed. According to the preparation method of the catalyst for preparing the low-carbon alcohol by converting the carbon dioxide, provided by the invention, the cobalt elementary substance and the oxide or hydroxide of the cobalt are used as raw materials, the interaction between the elementary substance cobalt and a cobalt compound is enhanced under the action of mechanical ball milling, Co0-Cox + double sites are created, and the double sites can catalyze the generation of the alcohol and the growth of a carbon chain; the selectivity of the low-carbon alcohol is greatly promoted, and the selectivity of the low-carbon alcohol is higher than 90%; the preparation method has the characteristics of less waste liquid, low cost, simple process and the like, and has a good application prospect.

The invention relates to a method for reinforcing the surface of a zirconium-based amorphous alloy through laser irradiation of silicon carbide particles, and belongs to the technical field of amorphous alloy surface modification. A silicon carbide particle medium is irradiated by laser, a silicon carbide particle phase is introduced into a parent phase on the surface of the zirconium-based amorphous alloy, and the surface hardness and the plastic deformation capacity of the zirconium-based amorphous alloy are improved. The method effectively solves the problems that the mechanical property is difficult to regulate and control, the manufacturing process is complicated and the like in the existing amorphous alloy particle reinforcing method. By changing laser irradiation parameters and types and parameters of the silicon carbide particle medium, the content of the silicon carbide phase on the surface of the zirconium-based amorphous alloy can be effectively regulated and controlled. The method is simple in implementation process, high in efficiency, clean, free of pollution and high in practicability, and can be applied to regulation and control of the surface hardness of the zirconium-based amorphous alloy and enhancement of functional application of the zirconium-based amorphous alloy.

The invention relates to a laser cladding powder for 30CrMnSiNi2A steel and a preparation method. The amount of each component in the laser cladding powder is Cr 0.8%-1.0%, Mn 0.75%-1.10%, Si 0.65% by weight percentage ‑1.10%, Ni2.0%‑3.2%, C0.16%‑0.22%, Cu0.15%‑0.20%, P0.015%‑0.020%, S0.01%‑0.015%, Rare earth 0.001%‑0.015% , the remainder is iron. The present invention further proposes a preparation method of the cladding powder. The laser cladding powder is specially used in the laser cladding technology of 30CrMnSiNi2A steel, so as to ensure the excellent bonding strength of the cladding interface, lower metallurgical defects and reduced dilution rate, and improve the fusion rate. The toughness of the cladding layer improves the wettability of the cladding powder, inhibits the cracking of the cladding layer and delays the crack growth rate.

The present invention provides banana transcription factors MaARF12 and MaARF24, which are proteins encoded by genes whose nucleotide sequences are shown in SEQ ID NO: 1 and SEQ ID NO: 2, respectively. The present invention also provides the encoding gene and application of the above transcription factor. Both the banana transcription factors MaARF12 and MaARF24 of the present invention can be combined with the promoter region of the banana fruit starch branching enzyme gene MaSBE2.3, can interact with the MaSBE2.3 gene, and inhibit its expression, which is beneficial to regulating the content of amylopectin and improving starch It is of great significance to cultivate new banana varieties with high quality and provide candidate transcription factor resources for improving the quality of amylopectin in bananas or other fruits.

The invention provides a solid lubrication composite coating on the surface of a base body. The composite coating is composed of hard phase nanocrystalline CrC and a lubricating phase a-C, a CrC / a-C composite coating is formed, the characteristics that the CrC hard coating is high in hardness and low in abrasion are kept, and meanwhile the excellent self-lubricating property of the a-C material is achieved. The multi-arc ion plating technology is adopted, metal Cr serves as a target material, high-purity Ar serves as working gas, C2H2 serves as reaction gas, the CrC / a-C composite coating is deposited on the surface of the base body, and the content of the CrC phase and the a-C phase in the composite coating can be regulated and controlled by controlling the flow of the Cr target current and the reaction gas C2H2. The hardness of the composite coating reaches up to 31 GPa, the abrasion rate reaches the magnitude of 10<-16> m<3> / N.m, the friction coefficient in the atmospheric environment is lower than 0.2, the base body working in the high-abrasion and high-friction environment can be well protected, and very high application value is achieved.

The invention provides a nickel-modified molybdenum carbide catalyst and its preparation method and its application in the reaction of carbon dioxide hydrogenation to prepare ethanol. The good hydrogenation ability of nickel and the good ability of molybdenum carbide to activate carbon dioxide make nickel carbide composite bimetallic Compared with non-precious metal catalysts, the catalyst exhibits high selectivity and high activity. Compared with noble metal catalysts, the nickel-molybdenum carbide catalyst has the characteristics of low price and simple preparation.

The invention belongs to the technical field of nano composite preparation and relates to a nano iron-carbon composite powder preparation method. The nano iron-carbon composite powder preparation method is characterized by including the steps: taking ferric nitrate as an iron source, taking water-soluble organics as a carbon source, and preparing the ferric nitrate, the carbon source and a reducing agent into homogeneous aqueous solution; heating the solution to enable volatilization, concentration and decomposition of the solution to obtain a precursor; calcining in a reducing atmosphere to obtain nano iron-carbon composite powder, wherein metal iron particles of the nano iron-carbon composite powder are uniform and adjustable in size distribution, iron / carbon phases of the nano iron-carbon composite powder are uniform in distribution and adjustable in content, and iron particles of the prepared nano iron-carbon composite powder are smaller than 20nm. The nano iron-carbon composite powder preparation method has the advantages of easiness in material acquisition, equipment simplicity, short process, high efficiency, low cost and applicability to industrial production.

The invention discloses a photonic crystal hydrogel film with both pH value and ionic strength responses, a preparation method and application thereof. The photonic crystal hydrogel film includes Fe3O4 nanoparticles and polyacrylamide-methacrylic acid hydrogel; the Fe3O4 nanoparticles are uniformly dispersed in the hydrogel, arranged in a one-dimensional chain, and the nanoparticles in the film The concentration is 1-50 mg / mL. The preparation method of the photonic crystal hydrogel film includes uniformly mixing Fe3O4 nanoparticles and hydrogel monomers, causing a curing reaction by ultraviolet light, and finally immersing in a soluble carbonate aqueous solution to obtain the desired film. The preparation method of the invention is simple in operation, strong in repeatability, convenient for large-scale preparation, the amount of carboxyl groups in the obtained film is controllable, the film is monochromatic, and has obvious color changes under the stimulation of pH value or ionic strength, and is suitable for naked eye detection.