477results about How to "Easy to get" patented technology

The invention discloses a bio-based foam adsorption material as well as a preparation method and adsorption application thereof. The bio-based polymer is used as a foam skeleton, the adsorbent with a large specific surface area is added to further improve the foam adsorption capacity, the cross-linking agent and the reinforcing filler improve the overall strength of the foam, and the bio-based foam adsorption material with the high adsorption capacity is obtained. The bio-based foam disclosed by the invention is light in weight, controllable in hydrophilicity and hydrophobicity, and capable of separating and removing pollutants such as oil and organic dye. The foam has high adsorption capacity and good cyclic adsorption capacity, can be repeatedly used, is biodegradable, does not pollute the environment, can effectively adsorb dangerous chemicals existing in a water body, does not cause secondary pollution, and can be used for decontamination treatment of organic pollutants in industrial wastewater.

The invention discloses a tryptophanase mutant and application thereof in production of indole, and relates to the technical field of microbial engineering. Through random mutation and site screening, amino acid replacement is carried out at the 389th site of SEQ ID NO: 1 to obtain a new tryptophan enzyme, and compared with the existing biosynthesis method, the recombinant bacteria constructed by using the gene segment of the modified tryptophan enzyme mutant can efficiently produce indole; meanwhile, the indole production method provided by the invention is low in cost, raw materials are easy to obtain, and the production cost is greatly reduced; the production method provided by the invention is short in fermentation period, simple in process, high in efficiency and not limited by regions. Therefore, the tryptophan mutant and the indole production method provided by the invention have good industrial practicability.

The invention discloses a method based on combination of a Voigt function and a deep neural network, which is used for reconstructing a Raman spectrum of a deep substance, solves the technical problems of complicated implementation process and higher implementation threshold in the prior art, and specifically comprises the following steps: step 1, generating a training data set; 2, training a deep neural network to obtain a Raman spectrum reconstruction model; step 3, collecting a spatial offset Raman spectrum of the double-layer sample; and step 4, carrying out baseline correction processing on the collected Raman spectrums to obtain corrected Raman spectrums, splicing the corrected Raman spectrums into input data, and inputting the input data into the Raman spectrum reconstruction model to obtain reconstructed pure Raman spectrums. The method is high in adaptability and simple in operation step, and can be used for automatically processing the Raman spectrum and eliminating the spectrum peak interference of the packaging material, so that the pure Raman spectrum of the deep sample can be quickly, simply and conveniently obtained.

The invention relates to the technical crossing field of polyphenylene sulfide fiber paper, special papermaking and insulation paper, in particular to high-temperature-resistant polyphenylene sulfide fiber composite insulation paper and a preparation process thereof. The high-temperature-resistant polyphenylene sulfide fiber composite insulation paper with a dense structure similar to reinforcing steel bar-mortar is prepared by preferably selecting the polyphenylene sulfide fiber with higher cost performance as a raw material and taking the aramid fibrid as a filling agent and an adhesive and adopting a wet papermaking process. The prepared composite paper has excellent temperature resistance and chemical corrosion resistance, the production process flow is short, the production process is free of pollution, the industrial production cost of the composite paper can be reduced, the temperature resistance and chemical stability of medium-and-low-end application insulation paper are improved, the application field of the composite paper in a more severe environment is widened, and the composite paper has good application prospects. Good economic benefits and application values are realized.

The invention provides a preparation method and intermediates of alasset hydrochloride, which comprises the following steps: reacting an initial raw material as shown in a formula 1, which is protected by bare phenolic hydroxyl groups or different protecting groups, with bis (pinacolato) diboron to obtain an intermediate as shown in a formula 2, carrying out coupling reaction on the intermediate and a compound as shown in a formula 3 to obtain a corresponding hydroxyl-protected intermediate as shown in a formula 4, and separating and purifying the intermediate to obtain the alasset hydrochloride. The preparation method comprises the following steps: carrying out catalyst pressurized hydrogenation, carrying out asymmetric chiral hydrogenation to obtain an intermediate as shown in a formula 5, carrying out substitution or reductive amination to obtain an intermediate as shown in a formula 6, carrying out nucleophilic substitution on the intermediate as shown in a formula 7 to obtain an intermediate as shown in a formula 8, and carrying out deprotection to obtain a target product as shown in a formula I. According to the invention, a chiral resolution link in the existing preparation technology is avoided, and a chiral group is introduced through asymmetric hydrogenation, so that the yield is greatly improved, the production cost is greatly reduced, the tedious and tedious synthesis steps in the original process are shortened, and the post-treatment is simpler and more controllable.

The invention discloses a variable splicing marker for tuberculosis diagnosis, a screening method and application, and relates to the technical field of marker screening, and the technical key points are as follows: the variable splicing marker is AIM2-Intron3-IR; by combining bioinformatics analysis, in-vitro experiments and clinical queue verification analysis of a large amount of high-throughput sequencing data, variable splicing markers closely related to tuberculosis are mined and determined, and a high-efficiency new tool is provided for tuberculosis diagnosis.

The invention relates to the technical field of fertilizers, in particular to a carbon-water biomass fertilizer and a preparation method thereof. The organic fertilizer is prepared from the following raw materials in parts by weight: 4000 to 5000 parts of solid wood sawdust, 80 to 120 parts of vegetable bran, 80 to 120 parts of wheat bran, 200 to 300 parts of cow dung, 200 to 300 parts of sheep manure, 20 to 40 parts of brown sugar, 30 to 50 parts of corn starch and 80 to 120 parts of microbial compound strains. The solid wood sawdust, vegetable bran, wheat bran, cattle and sheep manure and other agricultural byproducts are used as raw materials, decomposition of organic matters is accelerated under the action of fermentation and microbial composite strains, and the content of extractable organic carbon in soil is increased. According to the present invention, the soil structure and the soil fertility can be easily improved, the plant growth can be promoted, the resource utilization of the agricultural waste can be achieved, and the characteristics of environmental protection and sustainability are provided.

The invention relates to the technical field of hollow microneedles, in particular to a preparation method of a hollow microneedle and a mold of the hollow microneedle. The female die and the limiting plate are clamped through the positioning device, the relative positions of the female die and the limiting plate are finely adjusted, then a guide wire is used for penetrating, the hollow microneedle manufacturing die is obtained, and the die can be used for casting hollow microneedles in one step. The mold can be repeatedly used, all procedures and materials are low in price and easy to obtain, and the manufacturing cost of the hollow microneedle is greatly reduced; by changing the shape of the recess in the female die, the hollow microneedles with different shapes and different sizes can be manufactured, and the preparation of the hollow microneedles with large length-diameter ratio can be realized; the hollow microneedles with different holes can be prepared by changing the size and the shape of the guide wire; by adding different microneedle preparation solutions, the platform can be suitable for producing hollow microneedles made of different materials; in conclusion, the preparation method of the hollow microneedle has the characteristics of low cost, universality and high individuation.

The invention relates to a pulse compressor, in particular to a pulse compressor convenient to adjust, which comprises a collimating lens, a first plane reflecting mirror, a first diffraction grating, an angle reflecting mirror, a high-low mirror and a second plane reflecting mirror, the first plane mirror is fixedly installed on the precision rotating table, and the angle mirror is fixedly installed on the precision displacement table. According to the technical scheme provided by the invention, the defects in the prior art that different pulse width compression amounts are inconvenient to obtain by changing the relative interval of the grating and adjusting the introduced negative dispersion value through the diffraction angle of the grating, and collimation adjustment of the incident light is inconvenient can be effectively overcome.

The invention discloses a soybean plant pod-related phenotype extraction method, device, medium and equipment, and relates to the technical field of agronomy, and the method comprises the following steps: obtaining front and back images of a soybean plant in a to-be-detected area; constructing an improved twin network model; based on an original twin network model, replacing a feature extraction part with a compressed excitation residual network SE-ResNet50, increasing an attention mechanism, and adding a Dropout layer in a network classification layer; inputting the front and back images of the soybean plant into a target detection model to obtain coordinate information of stem nodes; according to the coordinate information of the stem nodes, the coordinate information of the pods is extracted, the Euclidean distance is adopted to obtain the distance between each pod and each stem node, and the pods and the stem nodes are matched; and after the pods are matched with the stem nodes, inputting the soybean plant image with the front and back images containing the pods into the improved twin network model, performing similarity judgment on the pods in the image, and obtaining the soybean plant pod related phenotypes.

The invention belongs to the technical field of photoinitiators, and particularly relates to a ketoxime ester photoinitiator as well as application and a photosensitive combination thereof. Compared with the prior art, the novel photoinitiator has the advantages that by introducing a sulfone phenyl specific structure to a ketoxime ester group and the like, excellent photosensitivity can be shown in the optical wavelength range of 280-400 nanometers, and compared with OXE-01 and OXE-02 commonly used in the market, the novel photoinitiator can show better photoinitiation efficiency under an ultraviolet visible (UV-Vi s) LED light source.

The invention relates to the technical field of building materials, and provides a high-durability modified cement-based composite material and a preparation method thereof.The high-durability modified cement-based composite material comprises a carbon dot polymer, mixing water and Portland cement, and the specific preparation steps are as follows: adding citric acid and urea into water to be dissolved, and then putting into a high-pressure reaction kettle to be heated to obtain an initial product; adding the initial product into water, and carrying out centrifugation, filtration, rotary evaporation and drying to obtain the carbon dots; the preparation method comprises the following steps: dissolving carbon dots in water, preparing an initial carbon dot polymer product by adopting a hydrothermal method or a microwave method, adding the initial carbon dot polymer product into water, centrifuging, filtering, rotationally evaporating and drying to obtain a carbon dot polymer; and mixing the carbon dot polymer with mixing water and Portland cement to obtain the high-durability modified cement-based composite material. The modified cement-based composite material prepared by the invention is simple to prepare, low in cost, green and low-carbon; the rust can be efficiently inhibited, and concrete reinforcements are effectively protected from being corroded; the method can be widely applied to reinforced concrete and has wide application prospects.

The invention discloses a reactor core heat exchange test device, which comprises a test body, the test body comprises an internal component and an external component, the internal component comprises a flow channel and a reactor core rod bundle, the reactor core rod bundle is arranged in the flow channel and extends along the extension direction of the flow channel, the reactor core rod bundle is a heating rod, and the external component is arranged in the flow channel and extends along the extension direction of the flow channel. The external component comprises an upper shell, a reactor core shell and a lower shell which are connected in sequence, the upper shell is provided with an upper cavity, the lower shell is provided with a lower cavity, an inner cavity of the reactor core shell is communicated with the upper cavity and the lower cavity, the reactor core shell is arranged on the flow channel in a sleeving manner, and the inner cavity of the reactor core shell is communicated with the upper cavity and the lower cavity. And the upper end of the reactor core rod bundle extends out of the upper chamber so as to be connected with a power supply. The reactor core heat exchange test device provided by the embodiment of the invention is high in structural strength and high in test precision, and can reproduce the geometric structure of the pressurized water reactor core to the greatest extent, and the obtained test data is closer to the real condition of the reactor core under the condition of a prototype power station accident.

The invention discloses an improvement method of sludge soft soil layer shield muck, and belongs to the technical field of shield tunnel construction muck improvement. Metakaolin, blast furnace slag, lignosulfonate and nano silicon dioxide powder are mixed to prepare a mixed raw material, the mixed raw material is pumped into a muck bin, then an alkali-activated solution is pumped into the muck bin, and the mixed raw material is stirred to be uniform; and after mixing and stirring, adding anionic polyacrylamide powder and bentonite, and continuously stirring until a gel system is generated, thereby completing muck improvement. According to the invention, sodium hydroxide and sodium silicate are used as alkali-activated solutions to activate a gel system, blast furnace slag provides a large amount of silicon elements and aluminum elements, and metakaolin contains silicon, aluminum and calcium elements to improve the strength of the gel system; during use, the two raw materials are separated, so that the two raw materials are prevented from reacting in advance before reaching a muck bin to generate gel, and pipeline blockage is avoided; the anionic polyacrylamide and the bentonite are matched, so that the permeability is improved, the drainage of water is facilitated, and the occurrence of spewing is effectively prevented.

The invention discloses a flexible electrode based on liquid metal and a preparation method thereof. The method comprises the following steps: preparing a suspension containing the liquid metal and a solid conductive material; adding a polymer solution; spraying on a substrate through ultrasonic waves; wherein the melting point of the liquid metal is less than or equal to 50 DEG C. The flexible electrode provided by the invention has stretchability, and can realize relatively high conductivity under the condition of relatively low content of liquid metal. In addition, the electrode has the advantages of environment-friendly recovery, low liquid leakage risk, multiple kinetic energy, self-healing and the like. The preparation method provided by the invention can be used for preparing a planar electrode and a curved electrode, and is applied to a flexible capacitive sensor for monitoring stress, strain and non-contact fluid flow.

The invention belongs to the field of magnesium alloy preparation, and particularly relates to an extruded microalloyed magnesium alloy with aging performance and a preparation method of the extruded microalloyed magnesium alloy. In order to overcome the defects in the prior art, the invention aims to provide magnesium alloy components and process design which are low in alloying degree and capable of remarkably enhancing the mechanical property of the magnesium alloy through aging heat treatment. The magnesium alloy comprises the following elements in percentage by mass: 0.11% of calcium, 0.48-0.49% of manganese, 0.99-1.04% of aluminum, 1.09-1.59% of zinc and the balance of magnesium and inevitable impurities, and the content of the inevitable impurities is not more than 0.05%. The magnesium alloy material contains low alloy element content, the grain refinement phenomenon is generated through high-speed extrusion, and the mechanical property of the material can be further improved through a follow-up aging treatment means.

The invention belongs to the technical field of new energy, particularly relates to the field of zinc ion batteries, and provides a low-cost and environment-friendly aqueous zinc ion battery electrolyte as well as a preparation method and application thereof. The low-cost aqueous zinc ion battery electrolyte comprises soluble zinc salt and an aluminum metal salt additive. The preparation method of the low-cost aqueous zinc ion battery electrolyte comprises the following steps: adding the aluminum metal salt additive into a soluble zinc salt solution, and uniformly stirring; according to the invention, the problems of uncontrollable dendritic crystal growth and irreversible side reaction in the application process of the zinc ion battery in the prior art are solved, so that the electrochemical performance of the zinc ion battery is improved.

The invention belongs to the technical field of intervertebral disc protrusion treatment, and discloses wearable intervertebral disc protrusion postoperative rehabilitation exercise equipment and an exercise system.The wearable intervertebral disc protrusion postoperative rehabilitation exercise equipment comprises a seat, a seat back is fixedly connected to the top of the seat, a supporting bandage is slidably arranged on the seat back, and a mounting box is fixedly connected to the side, close to the seat back, of the supporting bandage; a movable groove is formed in the chair back, a fixed box is arranged in the movable groove in a sliding mode, a dismounting and mounting mechanism used for mounting a mounting box is arranged in the fixed box, and the mounting box is arranged in the fixed box in a sleeved mode and is in sliding connection with the fixed box. The problems that an existing rehabilitation device is single in structure, limitation is large during lumbar vertebra rehabilitation training, when the patient needs to get up or do other actions, help of other people is needed, wearing is inconvenient, and the patient cannot walk freely conveniently are solved.

The invention relates to a cow's milk endogenous antibacterial peptide and application thereof, the cow's milk endogenous antibacterial peptide is an antibacterial peptide compound PKTKVIPYVRYL from endogenous enzyme hydrolyzed bovine casein, and the amino acid sequence of the antibacterial peptide compound is Pro-Lys-Thr-Lys-Val-Ile-Pro-Tyr-Val-Arg-Tyr-Leu. The compound has wide inhibitory activity on gram-positive bacteria and gram-negative bacteria, including porphyromonas gingivalis, escherichia coli, staphylococcus aureus and the like, respectively. The antibacterial peptide can be used as a health care product and / or a medical instrument or a medicine for preventing and / or reducing infectious diseases, a food bacteriostatic agent, novel functional food, pet food, an animal feed additive and daily chemicals and has a good application prospect.

The invention provides a roadbed water stabilizing layer material based on modified roasted electrolytic manganese slag, a method and application. The roadbed water stable layer material is applied to the technical field of resource utilization of industrial waste residues and comprises the following raw materials in percentage by mass: 3.0%-4.5% of cement, 40%-60% of coarse aggregate, 14%-27% of roasted electrolytic manganese residues, 1.12%-2.7% of a curing agent, 0.4%-0.75% of a stabilizer, 0.4%-0.7% of an exciting agent and 1.93%-3.73% of water. In this way, the water stable layer material prepared through the method has the advantages of being high in curing effect, strength and stability, and high in replicability and generalization performance.

The invention relates to the technical field of organoid culture, in particular to tumor organoid culture hydrogel with definite components and a preparation method and application thereof, and the tumor organoid culture hydrogel with the definite components comprises a gel precursor and laminin 521; the gel precursor is prepared by dissolving sodium alginate and gelatin in PBS; the concentration of the laminin 521 is 0.10 mg / ml to 0.15 mg / ml. The hydrogel provided by the invention is clear in component, the performance of the hydrogel for culturing the tumor organoid is equivalent to that of Matrigel, and the technical problems that Matrigel is complex in component, different in batches and high in price, and consequently conversion and application of a tumor patient source organoid model are limited are solved. Besides, the hydrogel provided by the invention is high in component industrialization degree, good in stability and easy to obtain, standardized and economic production can be realized, and support is provided for construction of a tumor organ model.

The invention belongs to the technical field of biological protein, and particularly relates to a cytological detection method of recombinant three-type humanized collagen, which comprises the following steps: S1, culturing cells: inoculating human dermal fibroblasts into a culture medium, and culturing to a logarithmic phase for later use; s2, co-culture: co-culturing the standard recombinant three-type humanized collagen with different concentrations and the human dermal fibroblasts in the logarithmic production period; s3, constructing a standard curve; s4, quantifying and evaluating. The concentration of the target protein can be calculated according to the standard curve, the method is simple, expensive detection instruments are not needed, and the method is more practical and convenient. Meanwhile, dozens of samples can be detected in batches at the same time, and the detection efficiency is greatly improved. When the concentration of the target protein is quantitatively detected, the biological activity of the target protein can be evaluated through the cell adhesion rate, and compared with an existing detection method, more biological information of the target protein can be provided.

The invention belongs to the technical field of berth distribution, and discloses a dry bulk cargo wharf berth distribution and ship loader combined dispatching system based on self-adaptive MOEAD. The invention provides a dry bulk cargo wharf berth allocation and ship loader combined dispatching system based on self-adaptive MOEAD. The system comprises an input module, an algorithm module, a berth allocation module, a loading and unloading dispatching module, a notification module, a control module, a loading and unloading operation module and a port leaving module. The input module is connected with the scheduling module and is used for inputting a ship plan table; the scheduling module is connected with the berth distribution module and the loading and unloading scheduling module and is used for scheduling through a scheduling algorithm; the berth distribution module is connected with the notification module and is used for carrying out berth distribution on the ship; and the loading and unloading scheduling module is connected with the control module and used for scheduling loading and unloading equipment. The operation efficiency of port loading and unloading is improved. The energy consumption of port loading and unloading equipment is reduced; the algorithm is high in convergence speed and has good convergence and distribution.

The invention relates to the technical field of solid-state batteries, in particular to a surface-modified inorganic solid-state electrolyte material and a preparation method and application thereof. The surface modified inorganic solid electrolyte material comprises an inorganic solid electrolyte material and a surface modification layer which discontinuously coats the surface of the inorganic solid electrolyte material, wherein the surface modification layer is a nano oxide with a dielectric property. According to the invention, the solid electrolyte material with high ionic conductivity is used as a matrix, and the nano oxide coating layer with dielectric property is introduced on the surface, so that the diffusion energy barrier of lithium ions is reduced, and the conductivity of the lithium ions in the electrolyte is improved; in addition, the coating layer with relatively strong moisture stability and electrochemical stability also reduces the damage of moisture in the environment to the electrolyte and the reaction between the positive electrode material and the lithium metal negative electrode material and the electrolyte, enhances the stability of the solid-state battery under high voltage, inhibits the generation of lithium dendrites, and remarkably improves the cycling stability of the battery.

The invention discloses a method for synthesizing main components of lavender essential oil in a directional proportion through mixed fermentation, and relates to the field of biosynthesis, and the method comprises the following steps: constructing linalool, linalyl acetate, lavandanol and lavandyl acetate strains, and testing products; and synthesizing the main component product of the lavender essential oil in a fermentation tank by using the constructed strain in a mixed bacteria mode. The invention provides a biological synthesis method of lavender essential oil which is natural, stable, controllable and high in purity, and main components of the lavender essential oil are close to those of real lavender essential oil.

The invention provides a graphene-loaded metal organic framework composite material as well as a preparation method and application thereof. The graphene-loaded metal organic framework composite material comprises a zirconium-organic framework material and a graphene active component, wherein an organic ligand of the zirconium-organic framework material is ellagic acid. The graphene-loaded metal organic framework composite material disclosed by the invention has an excellent adsorption effect on high-valence metal ions, so that the composite material has application potential in the aspect of adsorbing and removing radionuclides in the field of nuclear industry.

The invention relates to the field of building materials, in particular to high-strength ceramsite prepared from sintered iron ore waste powder and fly ash and a preparation method of the high-strength ceramsite. Comprising the following raw materials in parts by mass: 45.07-154.84 parts of iron ore waste powder, 0-101.41 parts of fly ash and 0-65.45 parts of bentonite, and 0-21.82 parts of calcium fluoride is added as an additive after the iron ore waste powder, the fly ash and the bentonite are uniformly mixed. The high-strength ceramsite is reasonable in design, the iron ore waste powder, the fly ash and the bentonite serve as main raw materials, the characteristics that silicon dioxide, aluminum oxide and other substances are melted and recombined under the high-temperature condition and have high strength are utilized, the water absorption rate of the high-strength ceramsite is about 0%, and the heat insulation or cold insulation performance of the high-strength ceramsite cannot be affected in the humid environment; and the low water absorption does not influence the setting of the water cement ratio of the concrete. The iron ore waste powder and fly ash high-strength ceramsite can be used as concrete aggregate.

The invention relates to a shale oil-water storage capacity quantitative evaluation method and system, and belongs to the technical field of shale testing. The evaluation method comprises the following steps: obtaining volume conversion parameters based on the dry weight of a shale sample, the weight of a saturated water shale sample, the weight of a saturated oil shale sample, a saturated water shale sample T2 spectrum curve and a saturated oil shale sample T2 spectrum curve; based on the volume conversion parameters, respectively carrying out isovolumetric water conversion on the T2 spectrum curve of the saturated oil shale sample and the T2 spectrum curve of the oil-water coexistence simulation; and completing shale oil-water reservoir capacity evaluation based on an isovolumetric water conversion result. According to the method, the volume conversion parameter K conversion method is adopted, the absorption and storage capacity characterization of the interior of the shale pores to the oil-water medium is regressed, the method is not affected by external characterization conditions and human factors, and the evaluation result is more scientific and objective.

The invention belongs to the technical field of lead-free solder paste preparation, and discloses a lead-free composite solder paste with a high spreading rate and a preparation method. The lead-free composite soldering paste comprises soldering powder and soldering flux. The soldering flux is prepared from modified rosin, an activating agent, a surface active agent, a thixotropic agent, thermosetting resin, an antioxidant, a corrosion inhibitor and an organic solvent. The activating agent comprises hydroxy acrylic resin, terephthalic acid and ethylene bis stearamide. The prepared lead-free composite soldering paste is good in wettability, good in printability, low in corrosivity and less in residue, can effectively inhibit the occurrence of undesirable welding phenomena such as tin beads, dewetting and collapse, greatly reduces the reject ratio of printing, and improves the reliability of welding; the preparation method of the lead-free composite soldering paste is simple and easy to operate, raw materials are easy to obtain, and the lead-free composite soldering paste is suitable for industrial popularization.

The invention discloses a preparation method of liquid lithium tetrafluoroborate, which comprises the following steps: fluorating anhydrous lithium chloride by anhydrous hydrogen fluoride in an organic solvent to obtain lithium fluoride, then introducing boron trifluoride gas or adding a boron trifluoride complex, and reacting to obtain a lithium tetrafluoroborate liquid; the preparation process is simple and efficient, the adopted raw materials are very easy to obtain, meanwhile, the fluorination reaction and the lithium tetrafluoroborate synthesis reaction are sequentially carried out in an organic solvent environment, the whole reaction process is safe, stable and reliable, and the preparation method is very suitable for large-scale batch popularization and application; and the lithium tetrafluoroborate liquid with a low acid value can be directly obtained and can be directly applied as an electrolyte additive.