24results about How to "Potential application value is good" patented technology

The invention discloses a method for removing reflection of inner conjunctiva in an eye fundus image. The method specifically comprises the following steps: collecting a sample picture for preprocessing; constructing a reflection removal model, wherein the reflection removal model comprises a reflection detection module, a blood vessel retention module and a reflection elimination module; processing the sample picture through a light reflection detection module and a blood vessel retention module, obtaining light reflection positioning features and blood vessel features, and then obtaining fusion features; generating a target picture by using a reflection elimination module; and then model training and reasoning are carried out to obtain an eye fundus image with inner conjunctival reflection removed. According to the method, under the condition that the fundus image with the reflective light is given, the reflective area can be positioned, the reflective light is removed, the vascular structure covered by the reflective light is recovered to a certain extent, the problem that the fundus image shot by a mobile fundus imager is not easy to use due to the reflective light of the inner conjunctiva is effectively solved, the automatic reflective light removal function is achieved, and the efficiency is improved. The fundus image imaging cost is effectively reduced, and the production efficiency is improved.

The invention relates to a combined diffractive optical element, a design method and application thereof. The combined diffractive optical element comprises a first DOE, a second DOE and a third DOE which are arranged in sequence. The second DOE is fixed, the relative position relation between the first DOE and the second DOE is adjusted to control the position of a light spot of the incident light on a focal plane, and the relative position relation between the third DOE and the second DOE is adjusted to control the focusing position of the incident light in the z-axis direction; two conjugate periodic phase planes are combined to construct a gradient grating with an adjustable period, so that the deflection angle of incident light is controlled, the two conjugate periodic phase planes are combined to regulate and control the incident light in the z-axis direction, the two groups of conjugate periodic phase planes are arranged side by side, and three DOEs are arranged; the method is applied to light beam dynamic three-dimensional regulation. According to the invention, the dynamic three-dimensional space regulation of the light beam is realized, the additional phase can be superposed on the second DOE to shape the incident light, and the device has huge potential application value in the fields of laser radar, laser weapons, laser processing and the like.

The present invention discloses a swelling-resistant, underwater-adhesive conductive composite hydrogel and its preparation method and application, belonging to the field of polymer materials. The method comprises adding monomers, gelatin, a cross-linking agent, a silver salt and an initiator to a water dispersion of lignocellulose nanofibrils, mixing the mixture evenly with dimethyl sulfoxide, and standing the mixture for a period of time at room temperature to obtain the conductive hydrogel. The conductive hydrogel prepared by the present invention has excellent comprehensive properties, including mechanical, electrical, swelling-resistant, underwater adhesion and strain sensing properties, and is suitable for the field of underwater communication sensors. Moreover, the preparation method adopted by the present invention is green, environmentally friendly, simple and easy to operate, low in cost, and easy to promote and apply in the market.

The invention discloses a multi-atom doped porous carbon material and a preparation method and application thereof.The porous carbon material is sodium lignin sulfonate carbon doped with phosphorus, boron, nitrogen and selenium, and the preparation method comprises the steps that the carbon material is activated and doped through solvothermal reaction to obtain a precursor, and then the precursor is subjected to high-temperature carbonization, potassium hydroxide activation and acid pickling to obtain the multi-atom doped porous carbon material. The polyatom-doped sodium lignin sulfonate porous carbon is obtained. The polyatom-doped sodium lignin sulfonate porous carbon prepared by the method provided by the invention has the advantages of ordered microstructure, hierarchical pore structure and high specific surface area, the specific surface area is greater than 2000m < 2 > / g, and the polyatom-doped sodium lignin sulfonate porous carbon can be applied to a supercapacitor electrode material, can provide a good channel for rapid diffusion and transmission of electrolyte ions in an electrochemical process, and can be used for preparing a supercapacitor electrode material. The utilization rate of active sites is increased, higher specific capacitance and excellent rate capability (the specific capacitance retention rate is greater than 60%) are shown, and the application value is good.

The invention discloses a Stagnosporopsis pogostemonis YNF4655 fermentation extract and application of the Stagnosporopsis pogostemonis YNF4655 fermentation extract, the Stagnosporopsis pogostemonis YNF4655 is preserved in the China Center for Type Culture Collection, and the preservation number of the Stagnosporopsis pogostemonis YNF4655 is CCTCC NO: M 20242804. The strain is fermented to prepare a Stagonosporopsis pogostemonis YNF4655 extracting solution, and the average diameter of an inhibition zone of the Stagonosporopsis pogostemonis YNF4655 extracting solution on pathogenic bacteria of the tobacco brown spot is 32.5 mm, so that the fermented extract has strong inhibition activity on the pathogenic bacteria of the tobacco brown spot and can be applied to inhibition of the pathogenic bacteria of the tobacco brown spot. Meanwhile, the invention has the advantages of simple preparation process flow and low raw material cost, and has better potential application value in the technical field of crop pesticides.

The invention belongs to the technical field of photo-thermal hydrophilic thin films, and discloses a transparent hydrophilic thin film with photo-thermal anti-fog and demisting performance and a preparation method of the transparent hydrophilic thin film. The transparent hydrophilic film is obtained by performing film forming treatment on a composite film solution, and the composite film solution comprises polyvinyl alcohol, a sulfonic polymer, cesium tungsten bronze nanoparticles and deionized water. The preparation method comprises the following steps: dissolving polyvinyl alcohol in deionized water, constructing a hydrophilic cross-linked network through hydrogen-bond interaction between the polyvinyl alcohol and a sulfonic polymer material, and cooperating with cesium tungsten bronze nanoparticles to prepare the transparent photo-thermal hydrophilic anti-fog film. According to the prepared anti-fog thin film material, a distorted non-coplanar structure is introduced to increase the free volume of molecules, so that the moisture absorption capacity in the thin film is improved, high transparency is kept, meanwhile, excellent photo-thermal performance is achieved in the ultraviolet / near-infrared region of sunlight, and the anti-fog and demisting effects are achieved under strong sunlight irradiation.

The invention discloses a rare earth cerium-based molecular catalyst and application thereof, and particularly relates to the field of molecular catalysts. The chemical formula of the molecular catalyst is {[Ce2 (TBDA) 2 (DMF) 2]. Solvents} n, TBDA < 3-> is obtained by removing three protons from 1, 3, 5-tris (4-carboxyphenyl) benzene, two Ce < 3 + > ions, two TBDA < 3-> coordination and two DMF molecules exist in a minimum asymmetric structural unit in the molecular catalyst, and the Ce < 3 + > ions respectively adopt a nine-coordination mode and a ten-coordination mode; adjacent Ce < 3 + > ions firstly pass through the TBDA < 3-> ligand to form a one-dimensional chain structure, and the one-dimensional chain structures further pass through the TBDA < 3-> ligand to form a three-dimensional network structure; the molecular catalyst presents three quadrilateral pore structures with different sizes on a c-axis. By adopting the technical scheme of the invention, the problem that the precious metal catalyst cannot be popularized and applied on a large scale in the conversion of low-concentration non-pure CO2 due to limited precious metal resources and high price in the prior art is solved, and the method has great application value in the aspect of cycloaddition reaction of low-concentration non-pure CO2 and cyanamide compounds.

The invention discloses a lunar large elliptical orbit satellite-borne orbit forecasting method. The method comprises the following steps: converting a preset classic orbit element at an initial t0 moment into an initial average Delaunay regular orbit element; obtaining an auxiliary variable according to a preset classic orbit element at the initial t0 moment and the initial average Delaunay regular orbit element; obtaining a proportionality coefficient required by linear extrapolation according to the auxiliary variable; obtaining an average Delaunay regular orbit element at the moment t according to a proportionality coefficient required by linear extrapolation and a preset extrapolation duration; according to the average Delaunay regular orbit element at the moment t, the corrected average Delaunay regular orbit element at the moment t is obtained; converting the corrected average Delaunay regular orbit element at the moment t into a classical orbit element at the moment t; and obtaining the position and the speed at the moment t according to the corrected average Delaunay regular orbit element at the moment t and the classical orbit element at the moment t. The method has the advantages of being small in calculation amount, high in calculation speed and high in calculation precision.

The present invention discloses a method for synthesizing a ribonucleic acid chain containing a non-natural base by a template-free enzymatic method and its application. A natural RNA initiation chain is mixed with a Poly(U) polymerase reaction buffer, and a ribonucleoside triphosphate containing a non-natural base is used as a substrate. Under the catalysis of the Poly(U) polymerase or its mutant, an RNA chain containing a non-natural base at the 3' end is obtained through an enzymatic reaction. The 3' end contains a non-natural base derivative TPT3 Al The RNA chain of TP can then continue to undergo click reactions with azide-modified fluorescent or other functional groups such as N3‑AF488 to achieve orthogonal labeling of RNA fluorescence or other functions. This method has high efficiency, low cost, easy operation, few by-products, and no polluting waste in synthesizing RNA containing non-natural bases. It has potential application value in the enzymatic synthesis of RNA chains containing non-natural bases and functional RNA end labeling.

The present application belongs to the technical field of zeolite molecular sieve, and particularly relates to an AFX type zeolite molecular sieve, a preparation method and application thereof. An initial gel obtained by mixing an aluminum source, a silicon source, an inorganic base (sodium carbonate and / or sodium hydroxide), seeds and water is subjected to a hydrothermal crystallization reaction, and a crystallization product obtained is subjected to solid-liquid separation, washing and solid drying in sequence to obtain the AFX type zeolite molecular sieve. The AFX type zeolite molecular sieve with no organic template agent and low silicon-aluminum ratio is synthesized by using a traditional hydrothermal synthesis method, using seeds and an inorganic cation double-oriented design, and has great potential application value in the future catalysis field of diesel vehicles and non-road mobile machinery and the industrial adsorption separation industry due to the properties of no organic template agent and low silicon-aluminum ratio, and the synthesis does not use an organic template agent, reduces industrial production cost, and also reduces environmental pollution, and has great economic advantages in industrial production.

The invention belongs to the technical field of plant molecular biology, and particularly relates to application of an expression inhibitor of an SlBBX19 gene. By creating an overexpression plant and a knockout plant of the SlBBX19 gene, the SlBBX19 gene knockout plant subjected to high-temperature treatment and low-temperature treatment is found to be good in growth condition and show obvious resistance, a gene resource is provided for cultivating a new stress-resistant tomato variety, and the SlBBX19 gene knockout plant has a relatively good potential application value and has a good application prospect. And a theoretical basis is laid for researching a mechanism of responding to stress signals and a molecular mechanism of tolerating adverse environments of tomato plants.

The invention discloses an application of FKBP12B in improving the survival rate of silkworms and the quality of silk. According to the invention, it is found for the first time that after the FKBP12B DNA is given to silkworms, the survival rate, the cocoon shell weight, the cocoon shell rate and the silk quality of the silkworms can be improved, which indicates that FKBP12B has a potential application value of improving the silk quality.

The invention discloses a transient frequency support control method considering the low voltage penetration characteristic of a converter, and relates to the field of electrical engineering, and the method comprises the steps: collecting the voltage data and frequency data of a power grid through a real-time monitoring sensor; based on the acquired power grid voltage data, carrying out converter voltage low-pass-through characteristic detection to obtain a voltage low-pass-through state; according to the voltage low penetration state, starting an adaptive response strategy, and adjusting a power instruction; based on the power grid frequency data, starting a virtual synchronous machine control algorithm according to the adjusted power instruction, and adjusting power output; a reinforcement learning algorithm is used to carry out cooperative adjustment on the voltage low-penetration adaptive response strategy and the virtual synchronous machine control algorithm, and the state of the power grid is recovered; according to the invention, through cooperative adjustment of the self-adaptive response strategy of the voltage low penetration state and the virtual synchronous machine control algorithm, the effect of the converter in power grid frequency adjustment is effectively improved, and the stability and reliability of the power grid frequency are enhanced.

The present invention discloses a method for preparing 5,6-dimethyl-5-heptene-2-one. The method comprises the following steps: under the action of a catalyst prepared in situ by organoaluminum and phosphorus oxide compounds, 5,6-dimethyl-5-heptene-2-one is prepared by pinacol and alkoxypropylene. The synthetic route of the present invention is novel, with pinacol and 2-alkoxypropylene as starting materials, a one-pot reaction process is adopted, and a 5,6-dimethyl-5-heptene-2-one intermediate is prepared simply and efficiently, and the intermediate can be used in the preparation of precious spices irone; compared with the 5,6-dimethyl-5-heptene-2-one synthesis method in the prior art, the present invention only needs one-step reaction. Secondly, the present invention uses phosphorus oxide compounds and organoaluminum for synergistic catalysis, and a small amount of catalyst completes the dehydration and rearrangement reaction of pinacol, simplifies the operation, and improves the yield and route atom economy.

The invention belongs to the technical field of nano photonics and chiral materials, and discloses a preparation method of a chiral gold nano helical structure particle and achiral molecule complex, which comprises the following steps: after centrifugally concentrating gold octahedral nanoparticles prepared by a seed growth method, dispersing the gold octahedral nanoparticles into a hexadecyl trimethyl ammonium bromide solution; dropwise adding the gold octahedral nanoparticles into the gold nano helical structure growth solution, standing in a water bath at 30 DEG C for 2 hours, centrifuging to obtain chiral gold nano helical structure particles, and dispersing the gold nano helical structure particles into a CTAB (Cetyltrimethyl Ammonium Bromide) solution; the achiral molecules are dissolved in ultrapure water, ultrasonic mixing is conducted on the achiral molecules and the gold nano spiral structure particle solution, standing is conducted for 10-12 h at the temperature of 4 DEG C, and the gold nano spiral structure particle and achiral molecule complex is obtained. According to the invention, reverse transfer of chirality from nanoparticles to achiral molecules is realized, an unprecedented CD resonance phenomenon is generated, and a brand new thought is provided for development of near-infrared response chiral devices.

The invention belongs to the technical field of epoxy resin materials, and particularly relates to a bis-primary amine ionic flame retardant, a synthesis method and application of the bis-primary amine ionic flame retardant in epoxy resin. The preparation method comprises the following steps: reacting a bis-primary amine compound with DOPA in an alcohol solvent system at room temperature, and separating out a white powdery substance after the reaction is completed, so as to synthesize the novel flame retardant. In the chemical structural formula of the flame retardant, a bis-primary amine compound and DOPA are combined by electrostatic attraction to form an ionic compound. The flame retardant is directly mixed with a bisphenol A diglycidyl ether monomer and is used for preparing an epoxy resin material. The synthesized novel flame retardant is high in flame retardant efficiency, when the adding amount is smaller than 5 wt%, the oxygen index of an epoxy resin cured product can be increased to 30% or above, and vertical combustion passes the UL-94V-0 level. More importantly, the flame retardant is mild in preparation condition and high in yield, and compared with pure EP, the mechanical property of epoxy resin modified by the flame retardant is greatly improved.

The present invention discloses a pyrazole carboxylic acid rare earth MOF luminescent material and its preparation and application, belonging to the technical field of sensor materials. The luminescent material is prepared by a solvothermal method by mixing 3-carboxymethoxy-1-carboxymethylpyrazole-4-carboxylic acid as an organic ligand with a terbium salt. The chemical expression is {[Tb2(ccpc)2(H2O)6]·1.5H2O} n , each asymmetric unit contains 2 Tb 3+ ions, 2 3-carboxymethoxy-1-carboxymethylpyrazole-4-carboxylates, 6 coordinated water molecules and 1.5 lattice water molecules. The MOF material can efficiently emit strong green light under light excitation of 265nm wavelength, with a quantum efficiency of 77.5%. When used for TNP sensing, the fluorescence quenching constant is 61119L / mol and the detection limit is 0.28μmol / L. The synthesis method of this material is simple, the performance is stable, and it has great potential application value in the field of fluorescence sensing.

The invention discloses a synthesis method and application of a mitochondrial targeting and responding porphyrinyl supramolecular self-assembly nano system. The specific synthesis process comprises the following steps: connecting monocarboxyl porphyrin and a triphenylphosphine group through bis (2-hydroxyethyl) disulfide through esterification reaction to obtain a compound TPP-S-S-PPh3; then self-assembling in a mixed solvent of tetrahydrofuran and water by utilizing the difference of hydrophilic and hydrophobic properties of different groups in a compound TPP-S-PPP3 to obtain a nano-structure compound TPP-S-PPP3 NPs, and adding catalase in the self-assembling process to carry out loading to obtain the target product porphyrin-based organic supramolecular self-assembled nano system TPP-S-PPP3 (at) CAT NPs. The synthesized nano system can accurately locate and enrich mitochondria in tumor cells, the level of active oxygen in the cells is remarkably improved, and the treatment effect of photodynamic therapy is effectively improved.

The present invention provides an interacting protein BrHIS4 of the BrAK3 gene of Chinese cabbage, which is significantly induced to express under high temperature stress. Overexpression of the BrHIS4 single gene or the BrAK3 and BrHIS4 double genes in yeast enhances the ability of yeast cells to withstand high temperatures. When the BrHIS4 single gene or the BrAK3 and BrHIS4 double genes of Chinese cabbage are silenced under high temperature, the degree of wilting of the silenced plants increases, the stability of the cell membrane decreases, and the antioxidant capacity weakens, indicating that BrHIS4 can enhance the high temperature resistance of Chinese cabbage alone or by interacting with BrAK3 to form a module. The results of the present invention accumulate basic theories for studying the mechanism of responding to high temperature signals, and also provide genetic resources for breeding new varieties of heat-resistant Chinese cabbage, which has good potential application value.

The invention belongs to the technical field of epoxy resin materials, and particularly relates to a P / N / S type flame retardant, a synthesis method and application of the P / N / S type flame retardant in epoxy resin. 2-aminobenzothiazole and phenylphosphonic acid react in an alcohol solvent system under the heating condition, white crystals are separated out after cooling, and the novel flame retardant is synthesized. In the chemical structural formula of the flame retardant, 2-aminobenzothiazole and phenylphosphonic acid are combined by electrostatic attraction to form an ionic compound. The flame retardant is directly mixed with a bisphenol A diglycidyl ether monomer and is used for preparing an epoxy resin material. The synthesized novel flame retardant is high in flame retardant efficiency, when the adding amount is 5 wt%, the oxygen index of epoxy resin cured products can be increased to 36.4%, and vertical combustion passes the UL-94V-0 level. More importantly, the mechanical strength of the EP material is 1.7 times higher than that of pure EP.

The invention discloses a synthesis method of a porphyrin coherent hybrid bimetallic sulfide and photocatalytic application of the porphyrin coherent hybrid bimetallic sulfide. Porphyrin molecules are combined with metal ion active sites in the bimetallic sulfide through coordinate bonds on the basis of a coherent hybrid strategy to form an inorganic-organic hybrid structure, namely the porphyrin coherent hybrid bimetallic sulfide. Wherein the porphyrin derivative has a high molar absorption coefficient, excellent photosensitivity and structural stability, and is effectively combined with metal ion active sites in the bimetallic sulfide through a strong coordinate bond to form an inorganic-organic hybrid simulated hydrogenase structure, and the unique electron conjugated structure of the porphyrin molecule can be used as an effective charge transfer platform; the charge separation efficiency is greatly improved, so that the photocatalytic hydrogen production performance is greatly improved.

The application discloses a two-dimensional nitrogen-doped carbon material loaded rhenium-based alloy nanoparticle electrocatalyst, and a preparation method thereof. The preparation method comprises the following steps: dissolving a rhenium-based metal salt, a transition metal salt, a purine small molecule and an inorganic salt in water to perform a hydrothermal reaction, so as to obtain a two-dimensional structure precursor; and calcining the two-dimensional structure precursor under the protection of an inert gas, so as to obtain the electrocatalyst. The high-melting-point rhenium metal is used to form alloy nanoparticles with the transition metal, so that the defects of sintering of the transition metal-based catalyst in a high-temperature synthesis process can be effectively avoided, the aggregation and growth of the alloy nanoparticles in the high-temperature synthesis process are prevented, the alloy nanoparticles are uniformly and highly densely loaded on the surface of a two-dimensional carbon nitride carrier, the proportion of surface metal atoms is greatly increased, and finally, the prepared electrocatalyst has good hydrogen evolution reaction catalytic activity and catalytic stability.

The invention discloses a photo-anode based on acid etching surface reconstruction and a preparation method thereof, and relates to the technical field of photoelectrochemistry. The preparation method comprises the following steps: S1, preparing a prismatic transition metal sulfide nanorod array on a cleaned conductive substrate to obtain a conductive substrate loaded with the prismatic transition metal sulfide nanorod array; and S2, acid etching is carried out on the conductive substrate loaded with the prismatic transition metal sulfide nanorod array in the step S1, the prismatic transition metal sulfide nanorod array is reconstructed into a cylindrical transition metal sulfide nanorod array, and the photo-anode based on acid etching surface reconstruction is obtained. After the prepared photoanode is subjected to acid etching surface reconstruction, the surface catalytic performance is obviously improved, the photocurrent density of an optimized sample under the bias voltage of 1.23 VRHE can reach 2.57 mA / cm < 2 > and is 2.89 times that of an original sample, and the photoanode has high photoelectrochemical performance.

The application belongs to the field of biotechnology and genetic engineering, and discloses a culture method of double-fluorescently labeled Caenorhabditis elegans for monitoring mitochondrial homeostasis, which comprises the following steps: culturing Caenorhabditis elegans ATU3301 strain to L4 larva stage, and selecting male as the father; culturing Caenorhabditis elegans MQD753 strain to L4 larva stage, and selecting hermaphrodite as the mother; placing them on a culture plate in a certain proportion, mating, and obtaining offspring; removing the parents and continuing to culture the offspring to L2 larva stage; screening Caenorhabditis elegans through a microscope to obtain target Caenorhabditis elegans; without an external staining agent, the fluorescent protein is stably integrated into the genome and specifically located in mitochondria, the signal is stable, the location is accurate, and the repeatability is high, which provides a new tool with physiological relevance, operational convenience and cost advantage for the research on mitochondrial homeostasis mechanism and the development of related disease drugs, and has great potential application value.