272 results about "Micro particles" patented technology

The invention discloses a method for constructing a multicellular living body material by adopting a droplet bioreactor, which belongs to the crossing field of biological materials and microbial engineering, and comprises the following steps: (1) resuspending different cells in different polymer solutions to prepare degradable or phase-separable hydrogel particles containing cells; (2) dispersing the hydrogel particles in a cross-linkable hydrogel matrix to form a composite hydrogel; and (3) curing the composite hydrogel, and then carrying out degradation treatment to obtain the liquid cavity structure multicellular system bioreactor with spatial partition and dynamic interaction characteristics. According to the invention, ordered distribution and metabolism synergy of different microorganisms in space can be realized, controllable degradability and excellent mass transfer performance are realized, bacterial slow release and metabolite exchange can be maintained, and the method is suitable for long-term stable operation of a continuous flow reactor. The method has wide application prospects in the fields of green biological manufacturing, renewable energy source production, environmental restoration, biomedical engineering and the like.

The invention belongs to the technical field of biomedical tissue engineering materials, and particularly relates to injectable composite plastic gel and a preparation method thereof. The injectable plastic gel provided by the invention is formed by suspending and compounding the cross-linked sodium hyaluronate gel particles and the biological tissue extracellular matrix particles, the two material particles in the injectable composite plastic gel are uniform in size and controllable in size, other toxic catalysts do not need to be added in the preparation process, and the injectable plastic gel is easy to prepare. The collagen / elastin composite material is rich in collagen and elastin, and shows good biomechanical properties. Meanwhile, the composite plastic gel contains a plurality of bioactive factors, and after the composite plastic gel is injected and filled into a body, the composite plastic gel is slowly degraded and can promote the generation and ingrowth of autologous fat cells and microvessels, so that the balance of degradation and remodeling is achieved. The preparation method of the injectable plastic gel provided by the invention can be widely applied to the fields of plastic surgery, medical beauty and the like.

The invention discloses bioactive macroporous hydrogel as well as a preparation method and application thereof. The bioactive macroporous hydrogel comprises hydrogel particles and a bioactive load loaded on the hydrogel particles, the hydrogel particles are obtained by mechanically extruding a hydrogel matrix, and the hydrogel matrix is formed by compounding sodium alginate, agarose and methacrylated hyaluronic acid through hydrogen bond crosslinking and photo-crosslinking; the bioactive load comprises: a) small extracellular vesicles of which the surfaces are modified with macrophage targeted CRV peptides; and b) a PLGA (poly (lactic-co-glycolic acid)) microsphere loaded with a cartilage inducer Kartogenin. The bioactive macroporous hydrogel disclosed by the invention has an internally communicated macroporous network, is beneficial to cell infiltration, blood vessel ingrowth and nutrient substance diffusion, and overcomes the defects that the traditional hydrogel is small in pore size and limits cell behaviors. According to the bioactive macroporous hydrogel disclosed by the invention, dual bioactive loads are adopted to synergistically promote tendon-bone healing, so that the treatment effect is better.

The invention discloses a full-automatic chemiluminiscence detection reagent for a porcine reproductive and respiratory syndrome virus N antibody and application of the full-automatic chemiluminiscence detection reagent, and belongs to the technical field of biology. The detection reagent comprises a serum diluent, a first reagent and a second reagent, the first reagent comprises magnetic particles coated with porcine reproductive and respiratory syndrome virus N protein; and the second reagent comprises an acridinium ester labeled anti-pig antibody. The kit can accurately detect the porcine reproductive and respiratory syndrome virus N antibody, is high in sensitivity, good in specificity, strong in interference resistance, high in precision, short in reaction time, simple to operate and automatic, provides material guarantee and technical support for prevention and control of porcine reproductive and respiratory syndrome, and has important significance.

A method for removing particles from water, the method comprising: supplying gelatinous zooplankton mucus to water comprising particles; allowing formation of particle aggregates in the water by allowing interaction between the particles in the water and the gelatinous zooplankton mucus; removing the particle aggregates from the water by passing the water comprising particle aggregates through a filter configured to receive water comprising particle aggregates and further filter the water; and exiting filtered water from the filter. A system for removing particles from water with the aforementioned method is also provided. Additional embodiments of the system and method for removing particles from water are disclosed herein.

The invention belongs to the technical field of multifunctional composite seed coatings for ecological restoration of high and cold regions, discloses a Qinghai cold-region bluegrass seed coating agent and a preparation method thereof, and aims to solve the composite problems of component antagonism, time sequence mismatch, freeze-thaw failure and the like in the prior art. The coating agent is characterized in that a three-layer composite structure of a biological core layer, a nutrition buffer layer and a functional protection layer is sequentially coated on the surface of a seed from inside to outside. The biological core layer comprises complex microbial inoculant particles and a first adhesive; the nutrition buffer layer comprises a low-temperature germination inducer, a slow-release nutrition microcapsule and a second adhesive; the functional protection layer comprises an interpenetrating network polymer skeleton, high molecular weight sodium alginate, nano silicon dioxide particles subjected to surface modification by a silane coupling agent KH-570 and food-grade indigo dye. By means of the scheme, efficient germination and stable planting of the Qinghai cold land bluegrass seeds in the high and cold environment are achieved.

The invention discloses a water glass-based full-life super-amphiphobic radiation refrigeration block material, which is prepared from the following raw materials in parts by weight: 1.5 to 3 parts of C-F long-chain modified micro-nano particles, 0.5 to 1.5 parts of water glass-based binder, 0.1 to 0.3 part of nano silicon dioxide sol and 0.05 to 0.16 part of curing catalyst, the C-F long-chain modified micro-nano particles are obtained by sequentially carrying out silane coupling agent grafting modification and fluorosilane grafting modification on nano particles with high sunlight reflectivity and micro particles with high sunlight emissivity. The super-amphiphobic function is converted into a three-dimensional block material from a two-dimensional coating, stress distribution optimization and interface bonding energy improvement are achieved while the ultra-low surface energy characteristic is kept, the problems of optical performance degradation and the like caused by surface pollution of the radiation refrigeration material are effectively solved, the mechanical durability of the material is essentially improved, and the service life of the radiation refrigeration material is prolonged. And the radiation refrigeration system can maintain stable performance in the whole life cycle.

Provided is a composition for controlling uptake of microparticles into a body, the composition containing a lactic acid bacterium. The lactic acid bacterium is preferably any one selected from bacteria belonging to the genus Lactobacillus and bacteria belonging to the genus Streptococcus. For example, the lactic acid bacterium is a bacterium belonging to Lactobacillus delbrueckii, Lactobacillus paracasei, Lactobacillus gasseri, or Streptococcus thermophilus.

The invention discloses an electromagnetic shielding cable for a radio altimeter and a preparation method thereof, and relates to the technical field of cables. The preparation method comprises the following steps: treating ethylene-tetrafluoroethylene copolymer particles, a mixed compatilizer, a chemical foaming agent and a nano nucleating agent by using mixed gas low-temperature plasma containing acrylic acid, performing melt blending by using a double-screw extruder, injecting supercritical carbon dioxide, and performing slow cooling and shock cooling to obtain a three-dimensional porous matrix containing micro-nano cells; the preparation method comprises the following steps: synthesizing ferroferric oxide particles by a solvothermal method, coating a silicon dioxide dielectric layer, and then chemically silvering to prepare ternary core-shell composite particles; modifying the particles with aminopropyltriethoxysilane and a block copolymer to obtain modified composite particles; melting, mixing and granulating the porous matrix and the modified composite particles to obtain the electromagnetic shielding composite material. And performing extrusion molding on a conductor to form an insulation shielding layer, thereby obtaining the cable. The cable has an excellent electromagnetic shielding effect.

According to the Tesla valve structure-imitated micro-flow controller and the preparation method thereof, improvement design is carried out on the basis of an existing Tesla valve structure, the pipe wall of a first branch straight pipe section is designed to be of an arc-shaped structure, the area is increased by 20%-30%, a sawtooth-shaped structure is arranged on the pipe wall, a tiny cavity is additionally formed in a second branch straight pipe section, and the area of the first branch straight pipe section is increased by 20%-30%; the diameter of the structure of the shunting section is modified to be gradually increased, so that the cross sectional area of the shunting section is expanded by 25%-30%, the inner diameter of the branch annular section is reduced, the outer diameter of the branch annular section is expanded, the area of the expanded branch annular section is increased by 25%-35%, and the length of the outlet section is prolonged to be 30%-40% of the original length. The micro-flow controller with the imitated Tesla valve structure prepared by the invention can effectively guide fluid to flow, reduce accumulation of micro-particles in a micro-channel and enhance the impurity particle embolism resistance of a system, so that the stability and reliability of the whole system are improved.

Disclosed in the present invention are an aqueous triggered controlled-release saline-alkali soil conditioner and a preparation method therefor. The aqueous triggered controlled-release saline-alkali soil conditioner comprises agent A. The agent A comprises a water-soluble polymer and controlled-release suspended particles. The controlled-release suspended particles comprise alginate / anti-reverse regulator composite particulates. The alginate / anti-reverse regulator composite particulates are obtained by sequentially subjecting an alginate to two-step gel cross-linking by means of a cationic anti-reverse regulator and a high-valent metal ion-containing cross-linking agent. In the present invention, the alginate used as a main material is subjected to charged regulator-based high-speed dispersion for primary gelation and high-valent metal-based secondary gelation, thereby preparing a micron-nano powder and suspension, and incorporating a solvable organic polymer material, the functions of graded release and intelligent regulation of a product are achieved. The incorporation of an organic acid and a phosphoric acid material can not only prevent a micro-irrigation device from scaling but can also achieve triggered controlled-release of the material on demand and in a timely manner, thereby achieving the effects of multi-particle-size dispersion and precise release of the product in soil.

The invention relates to the technical field of water treatment, in particular to a method for treating degradation-resistant organic pollution underground water based on a micro-interface strengthening technology. According to the technical scheme, the method comprises the steps that an underground water sample is collected and subjected to pollution characteristic analysis, composite material slurry is injected into a water-containing layer to construct an interface-enhanced in-situ reaction system, and the slurry is composed of nanoscale iron-based metal particles, graphene oxide derivatives, modified biochar, a surfactant and the like; meanwhile, a low-pressure gas injection system is arranged to form a micro-aerobic environment so as to improve the interface reaction efficiency, dominant microbial communities are synchronously injected, a slow-release carbon source carrier is added so as to strengthen the biological synergistic degradation effect, and the operation state of the system is regulated and controlled through multi-parameter monitoring. According to the method, a micro-interface synergistic system integrating physical adsorption, chemical reduction and biological metabolism is constructed, refractory organic pollutants such as aryl halide and polycyclic aromatic hydrocarbon in underground water can be efficiently and stably removed, and the method has the advantages of being high in remediation efficiency, high in operation stability and wide in environmental adaptability.

The application provides a low-crystallinity hydroxyapatite microsphere for implantation and a preparation method thereof, and the preparation method comprises the following steps: preparing a mixed solution of a calcium source reagent and a phosphorus source reagent, adding inorganic acid, alkali and a buffer into the mixed solution, adding a surfactant, and obtaining a hydroxyapatite micro-particle precipitate through constant-temperature reaction; cleaning the hydroxyapatite micro-particle precipitate, and preparing a hydroxyapatite micro-particle suspension by adding water; and performing spray drying on the hydroxyapatite micro-particle suspension to obtain the hydroxyapatite microsphere; wherein the surfactant is one or more of PEG and PVP. The hydroxyapatite microsphere obtained by the application has stable structure, belongs to spherical large particles, is easy to inject, and is not prone to agglomeration; when the hydroxyapatite microsphere is injected into a human body, the hydroxyapatite microsphere has good supporting effect; and the preparation method of the application is simple, has few process steps, and is easy to realize reaction conditions, and is suitable for large-scale production.

The invention relates to the technical field of food safety detection, in particular to solid-phase extraction filler for detecting pesticide residues in food and a preparation method and application thereof.The solid-phase extraction filler comprises a magnetic filler core and a selective adsorption layer wrapping the magnetic filler core; wherein the interior of the magnetic filler core at least comprises magnetic particles and a coating layer for improving the stability of the magnetic particles; the selective adsorption layer is composed of a porous organic framework material which is chemically grafted outside the coating layer; and a temperature-sensitive polymer gel layer also covers the outer part of the selective adsorption layer. According to the solid-phase extraction filler disclosed by the invention, through an innovative hierarchical structure design, the extraction of trace pesticide residues in food can be effectively improved, the extraction difficulty is reduced, and the extraction efficiency and the extraction selectivity are improved.

The invention belongs to the field of biomedical materials and tissue engineering, and particularly relates to an injectable mineralized collagen bone repair composite material loaded with stem cell recruitment factors and osteogenic induction factors and a preparation method of the injectable mineralized collagen bone repair composite material. The composite material is composed of 50%-53% of mineralized collagen matrix particles, 15%-20% of SDF-1alpha loaded heparinized gelatin microspheres, 15%-20% of BMP-2 loaded PDA coated mesoporous silica particles, 8%-10% of an NHS-PEG-NHS cross-linking agent and 4%-6% of glycerin. The composite material can realize time-space sequential regulation and control of'collection first and then differentiation '; a bionic bone matrix microenvironment is provided through the mineralized collagen matrix; the problems of two-factor release conflict and stability are solved; in-vitro experiments show that the material can significantly promote stem cell migration and osteogenic differentiation, and animal experiments prove that the material can recover 82-88% of mechanical properties of bone defect parts. The invention solves the technical problems of insufficient stem cell collection, low osteogenic differentiation efficiency and uncontrollable factor release of the existing bone repair material.

The invention discloses a preparation method of a tomato culture medium, which aims at solving the technical problems that peat resources are non-renewable and high in cost and the utilization rate of mulberry twig wastes is low, and is realized by the following technical scheme: firstly, crushing fresh mulberry twigs into particles; mixing silkworm excrement with a sodium alginate solution, and coating the mulberry twig particles in a fluidized bed at the air temperature of 60 DEG C and the atomization pressure of 0.3 MPa to form core-shell structure particles with the shell thickness of 0.1-0.3 mm; then mixing the core-shell particles with fine peat to form a mixture, and stacking the mixture with the coarse peat and the fine peat to form a three-layer gradient structure; and finally, spraying a zymophyte liquid with trichoderma content greater than or equal to 1.0 * 10 < 7 > CFU / mL until the water content is 40%, and standing and activating for 20 days. The matrix takes mulberry twigs as a core raw material, combines silkworm excrement slow-release fertilizer efficiency and gradient structure optimization water-air balance, can replace a traditional peat matrix to be used for tomato planting, and realizes agricultural waste recycling and low cultivation cost.

The utility model discloses a calcium hydroxide particle size accurate regulation and control device which comprises a workbench and a particle size regulation and control assembly used for accurately regulating and controlling the particle size of calcium hydroxide particles, a collecting hole is formed in one end of the upper surface of the workbench, and a fixing cylinder is fixedly installed at one end of the edge of the upper surface of the collecting hole. The particle size regulation and control assembly is detachably installed on one side of the fixing cylinder, an installation rod is fixedly installed at the other end of the upper surface of the workbench, an empty groove is formed in one side of the workbench, a vibration motor is arranged in the empty groove, and a linkage cylinder is fixedly installed at one end of the outer surface of the fixing cylinder. The whole structure has high regulation and control capacity on calcium hydroxide particles, accurate regulation and control can be carried out, the condition of mixing caused by large particle size span is avoided, particle size distribution is uniform, and application scenes with high particle size uniformity requirements can be effectively met.

Encoded separation pool libraries are provided herein, which are useful, inter alia, in forming highly diverse and dense arrays for screening and detecting a variety of molecules. A method of immobilizing a microparticle on a solid support is disclosed, wherein the microparticle is covalently linked via first and second linkers to a linker domain (e.g., peptide, protein, small molecule) and a nucleic acid, and performing a decoding process on the nucleic acid domain, thereby determining the composition of the linker domain and its location on said solid support. The second linker is selectively cleavable provided that the first linker is not cleavable. The decoding may include hybridization or sequencing. The second linker is e.g. a photocleavable linker or includes -S(O)2NH- -NHS(O)2- -C(O)O-, -OC(O)-, -C(O)NH-, -NHC(O)-.The linker domain may be bound to a linker ligand (which may be fluorescent), unless protected by a protecting group, which may be removed.

The present disclosure provides a composition for modifying the surface of mitochondria, comprising: a polymer backbone; a first chemical moiety conjugated to the polymer backbone, the chemical moiety comprising a peptide; and a second chemical moiety conjugated to the polymer backbone, the second chemical moiety comprising triphenylphosphine. The disclosure also provides a hydrogel comprising a plurality of hydrogel particles, each particle comprising a first polymer crosslinked with an enzyme cleavable peptide to form a crosslinked polymer and at least one mitochondria, wherein each hydrogel particle has an average diameter no greater than 100 microns. Methods of treating a disease and / or injury in a subject by administering the hydrogel are also provided.

The utility model provides non-contact biological particle treatment equipment and a biological particle treatment device. The biological particle processing device comprises a liquid droplet generating chamber, a working chamber communicated with the liquid droplet generating chamber, and a sorting chamber communicated with the working chamber. The droplet generating chamber is configured to receive a first liquid, a biological particle located within the first liquid, and a second liquid insoluble in the first liquid. The droplet generating chamber is used for enabling the flow of the second liquid to be staggered with the flow of the first liquid, so that the biological particles and the first liquid part around the biological particles jointly generate a biological particle droplet flowing to the working chamber after penetrating through the second liquid; the biological particles are cultured or tested through the first liquid. Therefore, the biological particle liquid drop can protect at least one biological particle located in the biological particle liquid drop, and culture work or detection can be completed while the biological particle liquid drop moves.

The application discloses a floating composite microbial preparation for removing marine oil pollution and a preparation method thereof. The floating composite microbial preparation contains bacillus thuringiensis NH26 strain, hollow glass microbeads and a lipopeptide surfactant purified from a fermentation liquor of the NH26 strain, has floating characteristics, can rapidly activate and efficiently degrade oil hydrocarbon, has good degradation capacity for alkanes and polycyclic aromatic hydrocarbons in seawater, and still has good degradation capacity for alkanes in seawater containing high-concentration oil hydrocarbon. The floating composite microbial preparation can be used for removing marine oil pollution and repairing marine environment. In addition, the application further provides a preparation method of the floating composite microbial preparation. The preparation method has simple preparation process, the obtained floating composite microbial preparation has uniform particle size, has high embedding rates for nitrogen and phosphorus, and can be prepared on a large scale.

Described herein are systems and methods to manipulate magnetic particles in liquid suspension. The system comprises at least two magnets, wherein one magnet tip is enclosed in a non-magnetic capsule that can be immersed into and pulled out of the liquid suspension contained in a vessel, and another magnet located outside of the vessel that may be activated to repel the magnet tip enclosed in the capsule. Microparticles in the liquid suspension are driven to the bottom of the vessel when the external magnet is activated and otherwise are driven to the bottom surface of the non-magnetic capsule by the magnet tip. Among other applications, the invention can be used in biotechnology to separate magnetic particles from a liquid suspension in a vessel as well as to transfer magnetic particles among a variety of liquid suspensions in multiple vessels

The present disclosure relates generally to microparticles containing algal proteins and their use in various applications. In some embodiments, the microparticles are precipitates. In some other embodiments, the microparticles are coacervates. In some embodiments, the microparticles are core-shell microcapsules having a hydrophobic core material encapsulated by a shell that contains an algal protein. In some embodiments, the hydrophobic core material comprises a flavor oil, a fragrance oil, or a combination thereof. In certain aspects, the disclosure provides the use of such microparticles to improve the texture, mouthfeel, perceived fattiness, or perceived creaminess of a comestible article. In some embodiments, the comestible article is a vegan dairy product, a vegan meat product, or a vegan seafood product. In certain aspects, the disclosure provides the use of the microparticles to provide a fragrance to a fragranced product, such as a personal care product, a laundry product, or a cosmetic product.

The invention provides a preparation method of core-shell coated piezoelectric electro-catalytic composite abrasive particles, which comprises the following steps: (1) synthesizing uniform piezoelectric material nano-particles by using two solvents with different polarities and adopting a phase separation induced nano-precipitation method; (2) putting the piezoelectric material nanoparticles into a sodium hydroxide deionized water solution, heating in a water bath at 80 DEG C, and carrying out surface modification on the surfaces of the nanoparticles; and (3) the piezoelectric material nano-particles subjected to surface modification react with cerium salt and a precipitator, and finally the composite abrasive particles are obtained. According to the method, the piezoelectric material is pretreated and modified, the modified piezoelectric material reacts with the photocatalytic material and the precipitator, the core-shell coated piezoelectric electro-catalytic composite abrasive particle is successfully prepared, the composite abrasive particle has good catalytic oxidation capacity, when the composite abrasive particle is used for polishing a GaN wafer, the removal efficiency of the material can reach 480 nm / h, and the removal rate of the material can reach 480 nm / h. And the abrasive particles are far higher than cerium oxide-based abrasive particles.

A mixture for enhancing eye lubrication comprises a plurality of microspheres having diameters ranging from about 5-40 microns combined with an aqueous component comprising water. The microspheres can be coated with oil. When the mixture is applied to the surface of a user's eyes, the microparticles will enhance lubrication during blinking and partially lift eyelids so that other components of the mixture can be better distributed beneath the eyelids. An oil can be added to the mixture. Preferably the oil is configured so that, when the mixture is agitated, it forms a temporary, thermodynamically unstable emulsion from which the oil quickly disassociates when the mixture is applied to the eye. The oil thus is quickly available to enhance lubrication performance.

A kind of microplastic toxicity exposure risk evaluation method for fish with wild grass carp as sample, the present application relates to the field of microplastic toxicity exposure risk evaluation, specifically relates to a kind of microplastic toxicity exposure risk evaluation method for fish with wild grass carp as sample.The present application is to solve the problem that the existing evaluation method is single, cannot comprehensively and accurately evaluate the toxicity exposure risk of microplastic to fish.Method: I, set experimental group;II, input wild grass carp to experimental group, record body length and weight;III, feed cultivation, respectively add corresponding microplastic particles, the control group does not add microplastic particles;IV, combine the weight change of wild grass carp, body length change, feeding rate, mortality and intestinal microbial diversity index for calculation;The higher the value of comprehensive index R, the higher the toxicity risk of microplastic to fish is evaluated.The present application is used to evaluate the toxicity exposure risk of microplastic to fish with wild grass carp as sample.

The invention relates to a large-particle dog and cat oral health-care functional food wrapped with instant freeze-dried particles and a preparation method thereof, and belongs to the technical field of pet food. According to the scheme, an external spraying system comprises grain base material particles, 0.1 to 0.15 part of lecithin, 0.002 to 0.003 part of monostearin, 0.001 to 0.003 part of vitamin E and 0.8 to 1.2 parts of chicken oil, and an instant freeze-dried particle layer comprises 0.1 to 0.2 part of fucoidan, 0.02 to 0.05 part of lysozyme, 0.04 to 0.08 part of tea polyphenol, 0.02 to 0.04 part of zinc gluconate, 0.05 to 0.1 part of Arabic gum, 0.03 to 0.1 part of glutamine, 0.01 to 0.02 part of vitamin B2, 0.01 to 0.04 part of vitamin B12 and 0.02 to 0.07 part of glycine. The toothpaste can effectively inhibit the formation of dental plaque and dental calculus and remove halitosis.

To provide a method for producing spherical silica particles for cosmetics which are suitable for cosmetic applications and have a low content of nanoparticles even when organic waste is used as a starting raw material, and to provide spherical silica particles for cosmetics derived from organic waste.SOLUTION: Provided is a method for producing spherical silica particles for cosmetics, including: preparing silica-containing organic wastes as a starting material; immersing the organic wastes in a liquid to increase the purity of silica; firing the organic wastes to obtain silica powder; pulverizing the silica powder to obtain silica fine particles; and melting and spheroidizing the silica fine particles in a flame to obtain spherical silica particles, wherein the silica fine particles have a specific surface area of 100 m2 / g or less.SELECTED DRAWING: None

The invention provides an acoustic-magnetic dual-mode diagnosis and treatment agent as well as a preparation method and application thereof, and belongs to the technical field of preparation of tumor diagnosis and treatment agents. The acoustic-magnetic dual-mode diagnosis and treatment agent is surface-modified magnetic nanoparticles which contain nano balloon genes and are subjected to Escherichia coli induced expression; the nucleotide sequence of the nano-balloon gene is a sequence shown as NCBI: KC601845.1, escherichia coli in the acoustic-magnetic dual-mode diagnosis and treatment agent as a diagnosis and treatment agent carrier has an active targeting property on a tumor hypoxic region, and bacteria contain a nano-balloon and have an acoustic response characteristic; the escherichia coli surface modified magnetic nanoparticles have a magnetic response characteristic. In acoustic-magnetic dual-mode imaging, firstly, on a real-time ultrasonic contrast monitoring image, a nano air bag expressed in bacteria can generate an enhanced tumor ultrasonic echo signal; secondly, under the action of an external changing magnetic field, the magnetic nanoparticles on the surfaces of the bacteria can generate an enhanced tumor magnetic vibration imaging effect, so that more efficient tumor diagnosis and / or treatment can be realized.

This invention provides a layered structure based on electrostatic filtration of nanoscale particles, relating to the field of electrostatic filtration technology. The layered structure connects an electrostatic adsorption layer and a flexible electrode layer to the two poles of a power supply component, with an insulating layer between the electrostatic adsorption layer and the flexible electrode layer. Combined with the gap-micropore dual-level porous structure and high-density electrostatic micronodes of the electrostatic adsorption layer, voltage focusing technology achieves uniform polarization across the entire electrostatic adsorption layer, eliminating adsorption blind zones and enabling efficient and long-lasting filtration of 0.075-100nm nanoparticles. The mask fabricated using this layered structure balances high-efficiency filtration with long-term wearing comfort, significantly improving the technical contradiction of high efficiency but high resistance in existing masks, making it suitable for prolonged industrial work.