63results about How to "High application potential" patented technology

The invention provides a slow-release antibacterial enhanced composite film for fruit and vegetable preservation and a preparation method thereof, and the preparation method comprises the following steps: performing sulfonation modification treatment on nano cellulose powder to obtain sulfonated nano cellulose; carrying out quaternization modification treatment on the sulfonated nano-crystalline cellulose to obtain quaternary ammonium sulfonated nano-crystalline cellulose; adding gelatin and sodium carboxymethyl cellulose into deionized water to obtain a wall material solution, and adding curcumin into the wall material solution to obtain a prepolymer solution; stirring and emulsifying the prepolymer solution at a high speed to obtain a prepolymer suspension; adding a chitosan solution into the prepolymer suspension to obtain a microcapsule solution, adding tannic acid into the microcapsule solution to obtain a microcapsule suspension, and performing spray drying to obtain double-layer microcapsule powder; the preparation method comprises the following steps: uniformly mixing polylactic acid, quaternary ammonium sulfonated nanocellulose, the double-layer microcapsule powder, a plasticizer, a lubricant and an antioxidant to obtain a mixed material, and sequentially carrying out melt extrusion, cooling, pelletizing and film blowing.

The invention provides rare earth doped fluorescent powder capable of emitting light through polychromatic light excitation and thermal excitation and a preparation method and application of the rare earth doped fluorescent powder. The fluorescent powder comprises rare earth doped fluoride, the chemical formula of the rare earth doped fluoride is Cs2NaLnF6: xRe < 3 + >, wherein Ln represents a rare earth element, Re < 3 + > represents a doped rare earth ion, and Ln and Re < 3 + > are respectively selected from different rare earth elements; x is the doping amount of Re in each mole of rare earth doped fluoride, 0 lt; xlt; and 100 mmol%. According to the invention, the advantages of wide band gap and appropriate fluorine vacancy trap of the Cs2NaLnF6 material are utilized, and the trap distribution and luminescence performance of the material can be effectively regulated and controlled by doping different types of rare earth ions with different concentrations and contents; polychromatic light excitation and thermal excitation luminescence of one or more rare earth ions under different doping concentrations are realized, and the application potential is high. The Cs2NaLnF6 fluorescent powder composite film material disclosed by the invention is excellent in flexibility, good in water resistance, high in stability and simple in preparation process, and has a great application prospect in the fields of information storage, encryption, counterfeiting prevention and the like.

The invention discloses a preparation method of a rod-like selenium nano-carrier, and belongs to the technical field of nano-pesticides. The rod-like selenium nano-carrier is formed by converting chitosan modified amorphous selenium (a-Se) into single crystal ash selenium (t-Se). The amorphous selenium is initially spherical, and after chitosan modification, the spherical amorphous selenium is converted into single crystal ash rod-shaped selenium nanoparticles. The length of the rod-like selenium nano-carrier is 590-610 nm, the diameter of the rod-like selenium nano-carrier is 20-25 nm, the effective average particle size of the rod-like selenium nano-carrier is 90-110 nm, the drug loading rate is 39.28% + / -2%, and the encapsulation efficiency is 64.90% + / -3%. In addition, the invention also provides an application of the rod-like selenium nano-carrier in a nano bactericide material.

The invention discloses an unannotated sign language translation method based on fusion attention. The unannotated sign language translation method comprises the following steps: acquiring a sign language video and a sign language spoken language text corresponding to the sign language video; constructing an initial sign language translation model based on a Transform architecture, and training the initial sign language translation model only through a sign language video and a sign language spoken language text to obtain an unannotated sign language translation model; in the training process, internal attention of the pseudo annotations and attention between the pseudo annotations are calculated and fused, and meanwhile, a contrast loss combined cross entropy loss training model is introduced; and translating the sign language video to be translated through the sign language translation model to obtain spoken language text output. The effect is improved in the aspect of annotation-free sign language translation, and compared with a previous sign language translation method, the sign language translation method has higher accuracy and application potential.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a derivative resin material and a preparation method of the hydrated borate micromolecule. The preparation method comprises the following steps: S1, synthesizing boron-nitrogen coordination micromolecules: dissolving and reacting boric acid, a derivative thereof and a polyfunctional group amine compound at room temperature through a solution reaction to obtain the boron-nitrogen coordination micromolecules; the borate micromolecule NCBW-X with intramolecular boron and nitrogen coordination is formed; s2, the NCBW-X micromolecule can be used for curing epoxy resin and synthesizing materials such as phenolic resin through end-NH2 and end-OH on two sides, the NCBW-X improves the mechanical property of each system through a rigid eight-membered ring, boron-nitrogen coordination of the NCBW-X can generate hydration, the environmental endurance is improved on the premise of retaining the original dynamic nature of boric acid ester of the NCBW-X, and the service life of the NCBW-X micromolecule is prolonged. Meanwhile, due to the dynamic reversibility of the NCBW-X, the NCBW-X is used for curing epoxy resin, and materials such as phenolic resin and the like are improved to a certain extent in the aspects of self-repairing and recycling.

The invention relates to the technical field of high polymer materials, and discloses antibacterial cellulose modified polylactic acid, triazole compounds have excellent activity in the antifungal aspect, and sulfanilamide groups can influence nucleic acid metabolism of thalli and synthesis of dihydrofolic acid so as to play a bacteriostatic role. Under the synergistic effect of a sulfanilamide group and a triazole group, the synthesized antibacterial cellulose has excellent antibacterial activity, the antibacterial group is introduced in a grafting manner, so that the long-acting antibacterial activity can be maintained, the polylactic acid is modified by using the cellulose, and due to the large length-diameter ratio of the cellulose and mutual overlapping of the cellulose, the antibacterial activity of the polylactic acid is improved. A good net structure is formed in a polylactic acid matrix through hydrogen bonds and Van der Waals force, so that a toughening effect on polylactic acid can be achieved, and the modified polylactic acid not only has excellent antibacterial activity, but also has better mechanical properties and thermal stability.

The application relates to a ferroelectric monolayer vanadium trichloride film and a preparation method thereof. The method comprises the following steps: evaporating and depositing VCl3 powder on the surface of a NbSe2 substrate under an ultrahigh vacuum atmosphere, and performing annealing treatment, so that the ferroelectric monolayer vanadium trichloride film is obtained. The sample preparation strategy of molecular beam epitaxy under an ultrahigh vacuum environment is used, high-purity VCl3 powder is evaporated and deposited on a NbSe2 substrate, an atomically flat monolayer VCl3 sample is obtained through annealing treatment, in-situ scanning tunneling microscope technology and scanning tunneling spectrum technology are combined, and it is determined that the monolayer VCl3 is a semiconductor material with ferroelectricity. The method provides a new method and idea for introducing ferroelectricity in the family of transition metal trichlorides, has high application potential and scientific research value, meanwhile, the successful introduction of ferroelectricity in the system also provides a new platform for carrying out multi-state regulation and research.

The invention provides a simulation method and device for detecting interface pressure of a cable joint through harmonic waves and a medium. The method comprises the following steps: modeling a simulation geometric model for the cable intermediate joint, and setting an ultrasonic excitation source; modeling through a nonlinear spring damper to obtain a cable joint pressure model; and performing nonlinear ultrasonic detection cable joint interface pressure simulation on the cable joint pressure model to obtain a spectrogram at each point probe. According to the invention, on a cable joint model, modeling is carried out through a nonlinear spring damper, nonlinear interaction at a cable intermediate joint interface is simulated, a nonlinear harmonic detection principle is utilized, and the change of harmonic characteristics when the interface pressure changes is deeply explored, so that the relationship between the two is established; the states of the cable intermediate joint under various interface pressures are accurately simulated, the interface pressure of the cable intermediate joint is fully considered, and simulation analysis is performed on the interface pressure detection of the cable joint by establishing a new interface nonlinear model.

The present invention relates to the field of genetic engineering in biotechnology, and specifically to a high-precision base editor that expands the editing range and improves editing efficiency. The editor of the present invention constructs a CDA1Δ-SpRY-BE3 high-precision editor with a wider editing range and higher editing efficiency by fusing the Cas9 variant SpRY that is not restricted by PAM with the cytosine deaminase CDA1 of different truncation lengths. The editor can effectively edit any cytosine on the genome while maintaining high editing accuracy. Tests in yeast and rice cells showed that compared with the existing standard editor CDA1-SpRY-BE3, the editor of the present invention achieved a significant improvement in editing efficiency at multiple targets, proving its application value in higher eukaryotes. The present invention provides a more efficient and accurate tool for the treatment of genetic diseases and crop breeding.

The invention belongs to the field of agriculture, and particularly relates to a wild vegetable natural composite preservative and a preparation method thereof, the wild vegetable natural composite preservative is prepared from the following raw materials by weight: 0.6-0.9 part of a mixed flavone extract, 1-2 parts of L-malic acid, 2-3 parts of sodium lactate, 10-20 parts of a glucose solution, and 20-30 parts of glycerin. The natural composite preservative is prepared by adopting a method for extracting flavone from plants, and the prepared product is healthy and safe to use and has excellent preservative and fresh-keeping effects. L-malic acid is used as a pH regulator, so that the pH value of the preservative can be maintained in a proper range, the growth of microorganisms and the activity of enzymes are inhibited, and the preservation effect is further improved.

The invention provides an intelligent mechanical response luminescent heterojunction material and a preparation method and application thereof, the chemical expression is x ZnS-(1-x) CaZnSO: 1% Mn < 2 + >, 0 < = x < = 1; the preparation method of the material comprises the following steps: (1) mixing ZnS, CaCO3 and MnCO3 according to a molar ratio of (1: 0)-(1: 1), and then adding MnCO3 accounting for 1% of the mass of the mixed powder; adding ethanol, grinding, and uniformly mixing to obtain mixed powder; (2) putting the mixed powder into a raw material reaction bottle, then putting the raw material reaction bottle into a reactor, and preparing a heat-insulating brick group to obtain a reaction device equipped with the mixed powder; and (3) preparing a microwave reaction furnace provided with a turntable capable of controlling rotation, placing the reaction device in the microwave reaction furnace for a synthetic reaction, and cooling after the reaction is finished to obtain the intelligent mechanical response luminescent heterojunction material. The material disclosed by the invention is obvious in mechanical luminescence phenomenon and high in luminescence efficiency, can directly generate the mechanical luminescence phenomenon through external force application, and can be applied to preparation of a mechanical force responsive film.

The preparation method of the viral nucleic acid detection reagent provided in the present application, after the ASFV amplicon hybridizes with crRNA, Cas12a cuts MB-ssDNA-ALP to release ALP, and the released ALP catalyzes the hydrolysis of pNPP into pNP, thereby generating a colorimetric signal, and the inner filtration effect of pNP on CdZnSe quantum dots changes the fluorescence signal, and the ASFV gene is detected using this dual-mode method, and the absorption intensity or fluorescence intensity is well linear with the ASFV gene concentration, and the detection limit is a single copy. In addition, the method can detect single-copy ASFV genes with the naked eye, and the detection sensitivity is higher than that of qPCR. Finally, the method can also effectively distinguish single-base mutations in crRNA, and has a good detection effect on viral DNA in serum. Therefore, the method has good sensitivity and specificity, and has a high application potential in the diagnosis of viral infections.

This invention discloses a high-activity, heat-resistant α-glucan phosphorylase mutant and its applications, belonging to the fields of genetic engineering and modern enzyme technology engineering. This invention utilizes site-directed mutagenesis technology to modify the wild-type... α‑ Dextran phosphorylase was modified to construct a series of mutants. Compared with the wild-type enzyme, the enzyme activity was increased by 1.68 to 2.49 times, and the mutants had a wider range of adaptability to temperature and pH. Among them, the mutant R282Y / H506A showed excellent thermostability. After incubation at 60℃ for 132 h, its enzyme activity was still 50.96%, and after incubation at 70℃ for 60 h, its enzyme activity was still 53.71%. The significantly improved thermostability creates better conditions for the use of this enzyme in practical applications.

The invention belongs to the technical field of biological detection, and relates to a PCR (Polymerase Chain Reaction) primer combination for detecting mycoplasma and application of the PCR primer combination, an upstream primer sequence of the PCR primer combination is as shown in SEQ ID NO.1, and a downstream primer sequence of the PCR primer combination is as shown in SEQ ID NO.2. When the PCR amplification primer combination is used for detecting mycoplasma, the specificity is high, the sensitivity is high, the pollution can be accurately detected under the mycoplasma DNA concentration as low as 0.5 ng / mu L, and meanwhile, the PCR amplification primer combination has the potential of high-throughput screening. A reliable and efficient technical means is provided for conventional mycoplasma detection, a mycoplasma detection kit prepared from the PCR primer combination can detect the most common mycoplasma in cell culture in a laboratory, and the PCR primer combination has the advantages of being high in specificity and sensitivity and wide in detection range and has good application prospects. The method has important application value for biomedical research and biotechnology industry.

The present invention relates to the technical field of photovoltaic module materials, and provides a method for preparing an anti-corrosion basalt fiber reinforced photovoltaic module. The present invention soaks basalt fiber fabric in ethanol to remove surface sizing agent; 3-mercaptopropyl triethoxysilane is added for reaction; epoxy cyclohexyl-cage polysilsesquioxane, 2-amino-5-chloro-2'-fluorobenzophenone, perfluoropolyether (methyl) acrylate, sodium ethoxide are added, the reaction is continued, taken out, cleaned with anhydrous ethanol, dried, and modified basalt fiber fabric is obtained; 6 layers of modified basalt fiber fabric and vinyl ester resin are molded and cured by semi-automatic flat vulcanizer to obtain anti-corrosion basalt reinforced composite fiber; the photovoltaic module includes a transparent plate, a back plate, a photovoltaic cell, and a support; the photovoltaic cell is sealed between the transparent plate and the back plate; the support is fixed on the photovoltaic back plate; the anti-corrosion basalt reinforced composite fiber is applied to photovoltaic module materials.

The invention discloses cation modified nano graphene oxide and a preparation method thereof, the transverse size of the cation modified nano graphene oxide is 10-100 nm, the surface of the cation modified nano graphene oxide is non-covalently bound with organic quaternary ammonium salt cations through electrostatic interaction, and the organic quaternary ammonium salt cations are provided by a cationic surfactant. According to the invention, electrostatic interaction is combined with a quaternary ammonium salt cationic surfactant, and a hydrophobic long alkyl chain of the quaternary ammonium salt cationic surfactant is exposed outwards, so that the product can be stably dispersed in various organic solvents such as methanol, ethanol, acetone, ethyl acetate, N-methyl pyrrolidone (NMP), N, N-dimethylformamide (DMF), dichloromethane and the like; the limitation that traditional nano graphene oxide is only limited to a water phase is avoided, and the compatibility and application potential in the fields of polymer composite materials, oil paint, high-performance resin and the like are improved.

The present application relates to a kind of stability and good photocatalytic performance of lead-free double perovskite microcrystal and its preparation method and application, belong to the preparation technical field of perovskite microcrystal.The lead-free double perovskite microcrystal of the present application is mainly Cs4MnSb2Cl 12 Microcrystal or Cs4Mn 0.7 Cu 0.3 Sb2Cl 12 Any one in microcrystal.The lead-free double perovskite microcrystal of the present application has good photocatalytic performance, with excellent stability, high purity and other advantages, shows great application potential in photocatalysis field.In addition, the preparation method of the present application is simple, easy to operate, low in equipment requirements, low in cost, low in energy consumption, suitable for large-scale production.

The invention provides oil-based drilling cutting-based fluid-state solidified soil as well as a preparation method and application thereof, and belongs to the technical field of fluid-state solidified soil. The oil-based drilling cutting based flow state solidified soil is prepared from the following raw materials: 100 parts of pretreated oil-based drilling cutting, 10 to 15 parts of a composite curing agent, 1 to 3 parts of polymer latex, 2 to 4 parts of rubber particles, 0.2 to 0.4 part of basalt fiber, 0.5 to 1 part of magnesium oxide, 0.2 to 0.5 part of a flocculating agent, 0.4 to 0.6 part of a water reducing agent and 60 to 80 parts of water, the pretreatment method of the oil-based drilling cuttings comprises the following steps that the oil-based drilling cuttings are subjected to heat treatment after being subjected to preliminary dehydration; then, uniformly mixing the oil-based drilling cuttings subjected to heat treatment with quick lime and an ionic salt solution, and carrying out braising treatment; and then adding activated carbon and wood chips, and stirring at normal temperature for reaction to obtain the pretreated oil-based drilling cuttings. The oil-based drilling-cutting-based fluid-state solidified soil has good fluidity and excellent compressive strength and crack resistance, the problems that oil-based drilling cuttings occupy land and pollute the environment after being piled up for a long time are solved, and resource utilization of waste materials is achieved.

The invention provides a beta-1, 3-glucan hydrolase mutant and application thereof, and relates to the technical field of biology. The mutant provided by the invention is obtained by carrying out site-directed mutagenesis by taking beta-1, 3-glucan hydrolase GH3 as a wild type enzyme. Compared with a wild enzyme, the enzyme activity of the D446W mutant is improved by 54%, so that the application potential and commercial value of the D446W mutant in the fields of medicines, health care products, functional foods and the like are favorably improved.

This invention relates to the field of materials. It relates to crosslinkable self-healing hole transport materials containing disulfide bonds and their applications. By introducing dynamic covalent bonds into the material system, not only can the construction of an internal covalent crosslinked network be achieved under mild conditions, improving the processing and operational stability of the hole transport material, but the dynamic covalent bonds also endow the hole transport material with a "self-healing" ability. When microcracks are generated due to bending, the dynamic chemical bonds within the material can break and reform under external stimuli, thereby repairing the cracks, restoring device performance, and enhancing the stability and application potential of the hole transport material in flexible organic optoelectronic devices.

The application provides a simulation method and device for harmonic detection of cable joint interface pressure and a medium. The method comprises the following steps: modeling a simulation geometric model of a cable intermediate joint, and setting an ultrasonic excitation source; modeling through a nonlinear spring damper to obtain a cable joint pressure model; simulating nonlinear ultrasonic detection of the cable joint interface pressure, and obtaining a frequency spectrum diagram at each point probe. Through modeling of the nonlinear spring damper on the cable joint model, the nonlinear interaction at the interface of the cable intermediate joint is simulated, the change of the harmonic characteristics when the interface pressure changes is deeply explored by using the nonlinear harmonic detection principle, the relationship between the two is established, the state of the cable intermediate joint under various interface pressures is accurately simulated, the pressure at the interface of the cable intermediate joint is fully considered, and simulation analysis is performed on the cable joint interface pressure detection by establishing a new interface nonlinear model.

The invention discloses a seal-imitating robot with two tail movement modes, and belongs to the technical field of underwater navigation equipment. The robot comprises a front body assembly, a rear drive assembly and a flexible outer skin. The front body assembly comprises a head, a control cabin and a seal-imitating front fin, and the rear drive assembly is connected with the rear part of the front body and is formed by sequentially connecting a seal-imitating lumbar vertebra unit, a pelvis unit, a lower limb bone unit and a tail fin unit. The lumbar vertebra unit comprises a bionic segment structure and a lumbar vertebra driving device, wherein the bionic segment structure swings through bending. The lower limb bone unit comprises tibia arranged on the two sides of the pelvis and a tibia driving device for driving the tibia to swing on the same side; the tail fin unit is composed of a fin root bone, tail toes and a tail fin driving device, the multiple tail toes form a fan-shaped support, and the tail fin driving device controls opening and closing of the fan-shaped support and swinging of the fin root bone. The seal imitating robot is compact in design structure, has efficient, smooth and stable motion characteristics and good environmental adaptability, and has excellent maneuverability and continuous operation capacity in various underwater tasks.

The invention relates to the technical field of aquaculture management, in particular to a method and system for improving incubation management efficiency of egg-carrying shrimps. Performing feature extraction and de-noising processing on each morphological feature image to obtain a feature point set corresponding to each morphological feature image; performing registration processing on the feature point set corresponding to each morphological feature image to obtain a feature point three-dimensional model; constructing a morphological feature three-dimensional model diagram of the target cherax quadricarinatus according to the feature point three-dimensional model of the target cherax quadricarinatus; importing the morphological characteristic three-dimensional model diagram of the target cherax quadricarinatus into a knowledge base to estimate the brood amount of the target cherax quadricarinatus to obtain the brood amount of the target cherax quadricarinatus; and classifying and screening the target cherax quadricarinatus according to the brood amount of the target cherax quadricarinatus. According to the method, the accuracy and efficiency of estimating the brood amount of cherax quadricarinatus can be effectively improved, the management cost can be saved while resources are reasonably utilized, and the management efficiency is improved.

The invention discloses a DSG2-targeted nuclide diagnosis and treatment integrated probe as well as a preparation method and application thereof, and the DSG2-targeted nuclide diagnosis and treatment integrated probe takes two serially connected cyclic peptides as a core targeting structure, and a DSG2-targeted radiolabeled complex can be obtained by labeling nuclide through a bifunctional chelating agent. Experimental results show that the complex is expected to be applied to DSG2 targeted nuclide diagnosis and treatment as a probe.

The invention discloses a method for preparing MXene through fluoride-free alkali etching of an ultrasonic-assisted supercritical fluid technology, and relates to the field of MXene preparation.Fluorine-free green preparation of MXene is achieved through cooperation of supercritical carbon dioxide fluid and a high-frequency power ultrasonic technology and a fluoride-free etching agent. The preparation method comprises the following steps: introducing carbon dioxide to reach a supercritical state, carrying out an etching reaction in the supercritical state by adopting a stirring or fluid circulation mode, applying continuous or discontinuous high-frequency power ultrasonic treatment to the whole reaction system, recovering to normal pressure and normal temperature after the reaction is finished, collecting a product, washing and drying, thereby obtaining the high-purity silicon dioxide. The high-frequency vibration of the ultrasonic waves and the high diffusivity of the supercritical carbon dioxide are utilized to promote the etching agent to remove A-layer elements in the MAX phase, so that the use of a fluorine-containing etching agent is avoided, the environmental pollution is reduced, and the etching efficiency of the MAX phase is also remarkably improved.

The invention discloses a nano-island confinement iron mononuclear site catalyst and a synthesis method and application thereof, and relates to the technical field of water pollution control and resource recovery, the catalyst takes spheroidal C-Fe0 as a nano-island confinement carrier, urea is introduced as a nitrogen source through a calcination process, and is coordinated with Fe atoms in C-Fe0 to form a FeN4 mononuclear site, and the nano-island confinement iron mononuclear site catalyst is prepared. And a space synergistic effect is formed with the nano island confinement carrier. The preparation method specifically comprises the following steps: dissolving anhydrous sodium acetate in a green tea extracting solution, adding an iron nitrate nonahydrate solution, magnetically stirring, and centrifuging, washing and freeze-drying after the reaction is completed to obtain an iron precursor; the preparation method comprises the following steps: mixing an iron precursor with urea, and roasting in an inert gas environment to obtain the nano island confinement iron mononuclear site catalyst marked as C-Fe0-coated FeN4. According to the catalyst, the co-activation capability of PAA and 2, 6-DCP on a C-Fe0-coated FeN4 interface can be enhanced, 2, 6-DCP is induced to be subjected to an efficient oxidative polymerization reaction, and synchronous emission reduction and carbon resource recovery of 2, 6-DCP are achieved.

The application relates to a three-dimensional force sensor and belongs to the technical field of sensors. The three-dimensional force sensor comprises, in sequence, an electrode layer, a pressure-sensitive layer and a mechanical transmission layer. The mechanical transmission layer comprises mechanically-transmitting structures which are arranged at intervals. The mechanically-transmitting structures comprise integrally-formed lower parts and upper parts. The lower parts are curved bases, and the upper parts are flagelliform protrusions. The electrode layer is provided with a collecting unit corresponding to the mechanically-transmitting structures. The three-dimensional force sensor can increase the top contact sensitivity, realize high-precision three-dimensional force detection of shear forces such as torsion, and is easy to manufacture and low in cost.