13results about How to "Sufficient source" patented technology

The invention discloses a magnetic biochar composite adsorbent as well as a preparation method and water treatment application thereof, and relates to the technical field of adsorption materials. The preparation method consists of a biochar matrix and magnetic particles loaded on the surface and in pores of the biochar matrix, and comprises the following steps: preparation of the biochar matrix: step 1, firstly, selecting a biomass raw material; the magnetic charcoal composite adsorbent has unique structure and performance advantages, abundant pore structures and surface functional groups of the adsorbent can provide a large number of adsorption sites for pollutants, and due to the existence of magnetic particles, after the adsorption process is completed, the adsorbent only needs to be placed in an external magnetic field such as an electromagnet and a permanent magnet, so that the magnetic charcoal composite adsorbent can be used for adsorbing the pollutants. The adsorbent can be rapidly separated from the solution or the suspension, the separation time can be controlled within 1-10 minutes, the recovery efficiency of the adsorbent is greatly improved, the treatment cost is reduced, and the adsorbent can be repeatedly used and has good economical efficiency and environmental protection property.

The utility model provides multifunctional integrated rice drying equipment, and relates to the technical field of rice drying, the multifunctional integrated rice drying equipment comprises a bottom plate, and a conveying mechanism is arranged above the bottom plate; the conveying mechanism comprises a drying box, the bottom face of the drying box is fixedly connected with the upper surface of the bottom plate, two inclined plates are arranged in the drying box, two side plates are fixedly connected to the upper surface of each inclined plate, seven protruding columns are arranged on the upper surface of each inclined plate, and flow guide blocks are fixedly connected to the side faces, close to each other, of each set of side plates. According to the multifunctional integrated rice drying equipment, structures such as the inclined plates, the side plates, the convex columns and the flow guide blocks are arranged, so that rice can be promoted to continuously roll and move in the drying process, the position and state of the rice in the drying box are changed, and the problem that the bottom of the rice in existing equipment is difficult to fully contact with heat due to contact with conveying equipment is effectively solved; and the rice drying and heating uniformity is greatly improved, and the vibration motor can enable the inclined plate to vibrate.

The invention discloses a composite antibacterial dressing, a preparation method and application of the composite antibacterial dressing in bone cultural relic protection materials, and relates to the technical field of bacteriostasis and the technical field of cultural relic protection.The composite antibacterial dressing comprises an elastomer layer and a hydrogel layer, and the hydrogel layer is attached to or embedded into the elastomer layer; the hydrogel layer is used for being attached to a cultural relic, and the hydrogel layer is hydrogel containing chlorhexidine digluconate; the elastomer layer is a polymer elastomer containing lipopeptide, a lipopeptide solution can inhibit the growth of pseudomonas, the composite antibacterial dressing can effectively inhibit the growth of aspergillus, trichoderma and pseudomonas in bone cultural relics, and meanwhile, the dressing can achieve the effects of preserving moisture and slowing down the water loss speed of the cultural relics, and is convenient to operate and carry. The invention also provides a preparation method of the composite antibacterial dressing, and the product obtained by the method has stable antibacterial and moisturizing effects.

The application discloses a medicine composition for delaying aging and resisting oxidation, and belongs to the technical field of biological medicine and health food. The composition comprises vitamin A, beta-carotene, compound vitamin B, vitamin C, vitamin D, vitamin E, vitamin K, and macroelements calcium, phosphorus, potassium, magnesium and trace elements zinc, selenium, iron, chromium, copper, molybdenum, iodine, fluorine and manganese, traditional Chinese medicines ginseng, astragalus root, medlar, prepared rehmannia root, ganoderma lucidum, conditional essential nutrients nucleic acid, and bioactive ingredients grape seed extract, lycopene, tea polyphenol, taurine, lutein, lutein fat, corn xanthophyll and chlorophyll; the composition is mainly suitable for middle-aged and old people; the composition can eliminate various factors causing aging from multiple systems, multiple links and multiple targets, can significantly delay aging, has the health care and tonifying effects of resisting oxidation and the like, can improve the life quality of the middle-aged and old people while delaying aging, and has no compatibility contraindication and will not produce any toxic and side effects after long-term use.

The invention discloses a monatomic catalyst as well as a preparation method and application thereof. The monatomic catalyst comprises a carbon carrier and active metal chelated on the carbon carrier, the active metal comprises one or two of nickel, copper, cobalt, iron, gold, silver, palladium and platinum; the active metal is dispersed on the carbon carrier in a monatomic form; the loading capacity of the active components in the monatomic catalyst is 0.1 wt%-6wt%. The monatomic catalyst has the advantages of being simple in preparation method, low in ligand cost, simple, low in ligand cost and the like, alcohol compounds can be directly dehydrogenated into aldehyde or ketone compounds, hydrogen can be produced as a byproduct, and the monatomic catalyst has the advantages of being high in reaction atom economy, green in process, energy-saving, synergistic and the like and has wide application prospects.

The invention is applicable to the technical field of biological medicine, and provides PDGFRA < + > mesenchymal stem cells as well as identification, sorting and culture methods and application thereof.A new dental developmental mesenchymal stem cell subset PDGFRA < + > MSCs is screened on the basis of single cell sequencing, in-vitro magnetic bead sorting and cell subset verification are performed through a marker gene, and under the serum-free and PDGFBB treatment conditions, the PDGFRA < + > mesenchymal stem cells can be obtained. The PDGFRA + MSCs with good multiplication capacity, osteogenic differentiation capacity and endothelial cell migration and lumen formation promoting capacity are obtained. The adult tooth developmental mesenchymal stem cells identified and screened by the invention can provide a more sufficient seed cell source for regeneration and transformation application based on human dental stem cells.

The present invention provides a micro-nano gel plugging agent and a preparation method thereof and a micro-nano gel plugging slurry, wherein the preparation method comprises: S1 mixing white oil and an emulsifier to obtain a mixed solution 1; S2 mixing water, a monomer and a cross-linking agent uniformly, adding an initiator, and mixing uniformly again to obtain a mixed solution 2; S3 mixing the mixed solution 2 and the mixed solution 1 uniformly under a nitrogen atmosphere, heating to 55-65° C., reacting for 1-2 hours, and obtaining a primary polymerization product; S4 dissolving polyvinyl alcohol and chitosan in water, adding them to the primary polymerization product, heating to 65-75° C., reacting for 12-36 hours, filtering, separating, purifying and drying to obtain a micro-nano gel plugging agent. The present invention is based on supramolecular chemistry theory, inserting special functional groups into macromolecules, and forming an ordered supramolecular structure, which can quickly form a grid structure, cement the surrounding medium into a solid whole in the leakage layer, and injecting a chemical plugging agent into the leakage layer to form a gel to block the leakage channel.

This invention provides a solid waste-based downhole backfill material and its preparation method. The preparation method includes: A) pre-treating CFB fly ash by removing impurities and screening to obtain pre-treated CFB fly ash A; B) activating gasification slag to obtain activated gasification slag; then decarbonizing the activated gasification slag to obtain activated gasification slag powder B; C) mixing the pre-treated CFB fly ash A obtained in step A), the activated gasification slag powder B obtained in step B), a composite activator, a composite water-reducing agent, and a composite thickener to obtain activated cementitious powder C; D) mixing coarse and fine gasification slag to obtain mixed gasification slag aggregate D; E) mixing the activated cementitious powder C, the mixed gasification slag aggregate D, and water to obtain the solid waste-based downhole backfill material; wherein steps A) and B) are not in any particular order, and steps C) and D) are not in any particular order. This invention enables waste utilization and meets the performance requirements of downhole backfill materials.

The present invention relates to a conjunctival sac drainage aqueous humor micro-irrigation device for treating severe dry eyes, comprising a drainage plate, a drainage body arranged on the drainage plate, a first drainage tube and a second drainage tube respectively connected to the drainage body, the drainage body is respectively provided with a liquid inlet and a liquid outlet, the drainage plate is provided with a reciprocating cabin base, the reciprocating cabin base is provided with a plug, the plug can move relative to the liquid inlet to open or close the liquid inlet, the second drainage tube is connected to the guide body, and the guide body is provided with at least one irrigation port. The surgical method of implanting the device of the present invention into the conjunctival sac on the ocular surface is feasible, the sterile aqueous humor can be drained to the ocular surface under reasonable automatic control to moisturize the ocular surface, there is no need to carry or use manually, and the aqueous humor is clean and sterile, the circulation time is short, and the source is sufficient, which solves the technical problem that there is no device implanted in the eye to effectively treat severe dry eyes.

The invention discloses an alloy monatomic catalyst as well as a preparation method and application thereof. The alloy monatomic catalyst comprises a carrier and an active component, the active component comprises a first metal and a second metal; the first metal is dispersed in the transition metal in a monatomic form to form monatomic alloy and is loaded on the carrier; the first metal comprises one or more than two of gallium, tin, indium and bismuth; the second metal includes a transition metal. The catalyst developed by the invention can directly dehydrogenate an alcohol compound to obtain an aldehyde or ketone compound, can produce hydrogen as a byproduct, does not need carrier gas, has the advantages of high atom economy, green process, high aldehyde and ketone production efficiency, energy conservation, efficiency improvement and the like, and has a wide application prospect.

This invention relates to a method for detecting zopiclone impurities, the method comprising the following steps: Step A: preparation of diluent; Step B: preparation of test solution: take zopiclone, add diluent, and dilute to prepare a test solution; Step C: preparation of reference solution: take impurity 6-(5-chloro-2-pyridinyl)-7-ethoxy-5,6-dihydropyrrolo[3,4-b]pyrazin-5-one reference standard and zopiclone reference standard, add diluent, sonicate to dissolve, and prepare a reference solution; Step D: determination method: take the test solution and reference solution respectively, inject them into a high-performance liquid chromatograph, record the chromatogram, and calculate the impurity content; wherein, the chromatographic conditions are: using octadecylsilane-bonded silica gel as the packing material; using acetonitrile-buffered saline solution as the mobile phase; flow rate of 0.5 mL to 2.5 mL per minute; detection wavelength of 280 nm to 320 nm; column temperature of 25 °C to 35 °C; sample chamber temperature of 0 °C to 15 °C; injection volume of 10 to 30 μl.

The invention provides high-temperature resin precoated sand for sand prevention of a heavy oil thermal production well as well as a preparation method and application of the high-temperature resin precoated sand. The high-temperature resin precoated sand for sand prevention of the heavy oil thermal production well is prepared from the following components in parts by mass: 4.2 to 5.6 parts of modified phenolic resin, 1.2 to 1.6 parts of organic silicon resin, 0.6 to 0.8 part of polyimide resin, 0.1 to 0.2 part of a reinforcing agent, 0.2 to 0.3 part of a toughening agent, 0.03 to 0.05 part of a silane coupling agent, 0.15 to 0.25 part of a catalyst and 100 parts of quartz sand. The high-temperature resin precoated sand for sand prevention of the heavy oil thermal production well can be consolidated at medium and low temperature reservoir temperatures, and the consolidated high-temperature resin precoated sand is high in compressive strength, good in permeability and excellent in sand blocking performance. The thermal decomposition temperature of the resin film of the precoated sand exceeds 390 DEG C, the precoated sand still has high strength and good thermal stability after being aged at the temperature of 300 DEG C, the sand prevention validity period can be prolonged, and the precoated sand is suitable for sand prevention of a heavy oil thermal production well.

The invention is applicable to the technical field of zinc metal negative electrodes, and provides a method for constructing a zinc metal negative electrode by a pulse thermal shock method, which comprises the following steps: cutting and washing commercial pure zinc foil; the zinc foil is fixed in a pulse generation device, the output pulse frequency is adjusted to be 1-8 Hz, the output voltage is adjusted to be 200-700 V, and pulse heat treatment is conducted for 10-30 s; and taking down the zinc foil after the pulse heat treatment is finished, and cutting into a circular electrode plate. The invention also provides a zinc metal negative electrode and application thereof. According to the method, pulse type rapid heat treatment is adopted, rapid heating and rapid cooling are mutually switched by adjusting a pulse process and pulse quenching, a discharge neck appears at a critical point, the surface is activated, diffusion free energy is reduced, atomic diffusion is accelerated, and formation of preferred orientation is facilitated; and shock waves generated by pulse discharge and high-speed flow of electrons and ions enable gas adsorbed by the powder to escape, and an oxide film on the surface of the powder is broken down to a certain extent, so that an impacted material is purified.