126 results about "Magnetic carriers" patented technology

The invention discloses a method for efficiently removing heavy metals in soil, which comprises the steps of sample collection, sample pretreatment, supramolecular cage preparation, heavy metal capture, material screening and the like, heavy metals such as mercury, lead, cadmium and the like in the soil are captured through the supramolecular cage, and a magnetic carrier after capturing the heavy metals is removed through a magnetic separation mode; the process flow period is short, the heavy metal removal efficiency is high, no nanoparticle residue risk exists, the long-term leaching risk of apatite, bentonite and other curing agents in a traditional stabilization technology is avoided, environment friendliness is high, and the method is especially suitable for industrial sites, mining areas and other combined pollution scenes and has wide application prospects. And an innovative technical path capable of being popularized is provided for soil remediation.

The invention discloses a carrier type anaerobic sequencing batch reactor suitable for anaerobic digestion treatment of sludge and a treatment method. The anaerobic sequencing batch reactor comprises a tank body, a stirrer, a biogas water-sealed tank, a temperature adjusting module, a bottom sludge inlet valve, a scum valve, an overflow sludge discharge valve, a bottom sludge discharge valve, a circulating sludge path and carrier adding equipment, the carrier recovery device comprises a magnetic adsorption recovery device, the output end of the overflow sludge discharge valve and the output end of the bottom mud discharge valve are connected with the input end of the magnetic adsorption recovery device, the reactor can enrich microorganisms by adding the magnetic carrier, the settleability of the sludge can be improved by formed anaerobic granular sludge, and the magnetic carrier can be recycled. The device is simple in structure, realizes shorter sludge hydraulic retention time and longer sludge retention time, and is matched with carrier recovery equipment to recover carriers in discharged sludge and enable the carriers to flow back to the reactor, so that loss of the carriers is avoided.

The invention belongs to the technical field of drug carriers, and particularly relates to a magnetic nano-drug carrier which is prepared by the following steps: selecting traditional Chinese medicine raw materials and auxiliary raw materials, and selecting corresponding equipment for treating the raw materials; traditional Chinese medicine raw materials are pretreated, effective components are extracted through ultrasonic and reflux combination, and finally an extracting solution is purified and concentrated; preparing through a coprecipitation method; the flexible traditional Chinese medicine dressing is prepared by taking anti-inflammatory, analgesic, blood-activating and blood-stasis-removing active ingredients of 19 traditional Chinese medicines as cores and combining with the local magnetic response enrichment characteristic of the magnetic nano-carrier, the flexible traditional Chinese medicine dressing is attached to a pressurized silica gel pad of a PCI postoperative wrist strap for use, local directional enrichment of the active ingredients of the traditional Chinese medicines in a wound is promoted through the magnetic carrier, and the wound healing effect is improved. The pressurizing silica gel pad has the synergistic effects of resisting inflammation, easing pain, improving microcirculation and dredging collaterals and restoring the pulse, solves clinical pain points such as inflammation edema, obvious pain and unsmooth local blood supply of a wrist puncture wound after the PCI operation, and meets the requirements of flexibility, ventilation and fitting of the pressurizing silica gel pad at the same time.

The invention discloses a blue-green algae collecting device based on a magnetic carrier and a collecting method of the blue-green algae collecting device, and belongs to the technical field of blue-green algae treatment. The device comprises a liquid storage unit, a magnetic separation unit and a collection unit, the magnetic separation unit is matched with the liquid storage unit, the magnetic separation unit generates a directional magnetic field and acts on mixed liquid in the liquid storage unit, so that magnetic carriers combined with blue-green algae in the mixed liquid are gathered in the acting direction of magnetic field force, and the blue-green algae-magnetic carrier compound is formed. The magnetic carrier is prepared, and polydopamine (PDA) is rich in active groups, so that the affinity and binding force to cyanobacteria cells are enhanced; meanwhile, a buffer solution is used for accurately regulating and controlling pH, the optimal environment for carrier synthesis and blue-green algae combination is guaranteed, and compared with an unmodified carrier, the blue-green algae capture rate is remarkably increased.

The invention discloses a three-dimensional network structure magnetic fiber carrier reinforced micro-plastic magnetic separation removal method, which is characterized in that Fe3O4 nanoparticles are selectively precipitated among sepiolite fiber bundle layers by controlling a coprecipitation process, and a wedging effect is generated to realize controllable stripping of fiber bundles, so that a three-dimensional network structure magnetic carrier is formed; a mechanical interlocking structure is formed on the surface of the flexible fiber and the micro-plastic, and the pH of a water body is self-adaptively regulated and controlled through the amphoteric ionization characteristic of silicon hydroxyl; enabling the magnetic aggregate suspension to sequentially pass through a multi-stage gradient magnetic field consisting of a pre-magnetization field, a main separation field and a fine scavenging field, and controlling the flow rate to enable the aggregate to form a stable filter cake layer on the surface of a magnetism gathering medium, so as to realize efficient separation of the micro-plastic; and the magnetic gathering medium capturing the aggregate is subjected to heat treatment, so that the micro-plastic is thermally decomposed, the magnetic carrier is directly recycled, the magnetic performance is improved, and regeneration reinforcement is realized. The micro-plastic removal rate reaches 99% or above, the performance is stable after multiple cycles, and the method is suitable for treating various micro-plastic-containing water bodies.

Magnetic carrier include a carrier core and a resin coat layer that coats the surface of the carrier core, and can electrostatically charge toner positively by friction. The resin coat layer contains polyimide silicone resin and silica particles.

A wireless short hop assembly includes a transmitter antenna and an integrated receiver / pulser module. A receiver antenna and a pulser assembly are consolidated into the receiver / pulser module. The transmitter antenna is configured to transmit, via magnetic flux induction, a magnetic carrier wave conveying a wireless signal to the receiver antenna. When the wireless short hop assembly is deployed on subterranean drilling bottom hole assembly (BHA) such that a shock reduction tool is interposed on the BHA between the transmitter antenna and the integrated receiver / pulser module, the integrated receiver / pulser module positions the receiver antenna closer to the shock reduction tool and the transmitter antenna than if the receiver antenna and the pulser assembly were discrete. The wireless signal as received by the receiver antenna is stronger and more stable than if the receiver antenna and the pulser assembly were discrete.

The invention discloses a preparation method of a magnetic covalent immobilized enzyme carrier. The preparation method comprises the following steps: adding polyethyleneimine into a silicon-coated Fe3O4 microsphere dispersion liquid to obtain modified Fe3O4 microspheres; and dispersing the modified Fe3O4 microspheres in a solvent, adding dialdehyde cellulose, and reacting to obtain the magnetic covalent immobilized enzyme carrier. Amino groups of the modified Fe3O4 microspheres and aldehyde groups of dialdehyde cellulose can be subjected to condensation reaction to generate Schiff base groups, and the Schiff base groups and unreacted aldehyde groups, amino groups and other groups act together, so that enzyme is effectively fixed on the surface of a magnetic carrier. The preparation method of the magnetic covalent immobilized enzyme carrier is simple in process, easy in reaction control and operation and low in operation cost, and has the advantages of high enzyme loading capacity of the immobilized enzyme carrier, high biocompatibility, good dispersion effect, good stability, immobilized enzyme activity recovery and the like.

The invention relates to the technical field of disinfection devices, and discloses a disinfection device for offshore culture, which comprises a disinfection tank, a magnetic control mechanism arranged at the bottom of the disinfection tank and a plurality of magnetic carriers arranged in the disinfection tank, magnetic balls are arranged in the magnetic carriers, and a plurality of disinfection particles are arranged on the outer walls of the magnetic carriers. The overall density of the magnetic carrier is smaller than the density of seawater, and the magnetic control mechanism comprises a supporting rod and an electromagnet; through the arrangement of the magnetic carrier bearing disinfection particles and the magnetic control mechanism, the technical problems of large disinfectant dosage and inaccurate action in existing fry disinfection are effectively solved, the magnetic carrier can be driven by the magnetic control mechanism to realize reciprocating lifting and translation, so that the outer wall slow-release disinfection particles are accurately close to the body surfaces of fries, and the disinfection effect is improved. Disinfecting components directly act on pathogenic microorganisms, water diffusion sterilization is achieved without adding a large number of disinfectants, and the disinfectant dosage and the breeding cost are remarkably reduced.

The utility model provides a magnetic carrier plate disassembly and assembly jig, which relates to the technical field of magnetic disassembly and assembly jigs, and comprises a bottom plate, the top of the bottom plate is fixedly connected with an annular plate, the inner walls of the two sides of the annular plate are embedded and fixedly connected with bearing rings, a jacking shaft is arranged in the annular plate, and the two ends of the jacking shaft penetrate through the bearing rings and are fixedly connected with the bearing rings. A jacking shaft is arranged in the annular plate, one end of the jacking shaft is fixedly connected with a handle, the center of the jacking shaft is sleeved with and fixedly connected with a movable cam, a jacking plate is arranged in the annular plate and located above the movable cam, and the top of the annular plate is fixedly connected with a top cover plate. In the production process, the carrier plate is stably disassembled and closed, products are stably, safely and losslessly loaded and unloaded, meanwhile, the opening and closing structure of the jig is used, the clamping jaw is used for pulling the bottom plate, the ejector pin is used for jacking the cover plate, the magnetic carrier plate is stably opened and closed, and then the products are loaded and unloaded leisurely and losslessly.

The invention relates to the technical field of biological catalytic synthesis, and discloses a medical magnesium L-threonate synthesis method, which adopts three layers of magnetic carriers to immobilize L-threose oxidase, and realizes pH gradient regulation and control through a two-stage series reactor. The pH value of the first-stage reactor is 7.0 + / -0.2, enzyme catalytic oxidation is carried out, the pH value of the second-stage reactor is 8.0 + / -0.2, a magnesium complex reaction is carried out, and finally the carrier is recovered through magnetic separation. According to the method, the conversion rate is increased from 70-80% to 88 + / -2%, the product purity is increased from 90-95% to 99.0 + / -0.3%, the carrier can be recycled 6-10 times, the enzyme activity retention rate is larger than or equal to 75% when the carrier is used for the sixth time, and efficient and green synthesis of medical grade magnesium L-threonate is achieved.

The present invention relates to a magnetic carrier, a two-component developer, and a replenishing developer. The magnetic carrier is a magnetic carrier comprising a magnetic core and a coating resin configured to coat the surface of the magnetic core, wherein the coating resin comprises a graft resin A and a graft resin B, wherein the coating resin (i) comprises 1.0% by mass or more and 50.0% by mass or less of the graft resin A, and (ii) comprises 50.0% by mass or more and 99.0% by mass or less of the graft resin B, wherein the graft resin A has a unit Y1 represented by the following formula (1) and a unit Y2 represented by the following formula (2), wherein the graft resin B (i) is a comb polymer having at least one site selected from, for example, a styrene-based polymer site and a (meth)acrylate-based polymer site as a branch, and (ii) contains a polysiloxane structure site at a content of 0.1% by mass or less, #imgabs0#

The present application belongs to the technical field of analysis and detection, and particularly relates to an enrichment material of estrogen substances and an analysis method thereof. The enrichment material of estrogen substances (Fe3O4@SiO2@CMP-SO3Na) comprises a magnetic carrier and an ionic conjugated microporous polymer loaded on the surface of the magnetic carrier. The composite material exhibits high adsorption capacity, fast adsorption kinetics and excellent reusability by virtue of the synergistic effect of the conjugated system-ion group-porous structure. On this basis, the present application first establishes an MSPE-HPLC-MS / MS combined analysis method based on Fe3O4@SiO2@CMP-SO3Na, and successfully applies the method to efficient enrichment and accurate detection of trace EEs in food samples (such as honey, dairy products) and environmental water (such as surface water, wastewater).

Magnetic carrier includes a carrier core and a resin coat layer. The magnetic carrier electrostatically charges toner positively by friction. The resin coat layer coats the surface of the carrier core. The resin coat layer contains polyimide silicone resin and fluorine-containing resin.

The invention provides a high-activity synbiotics nourishment as well as a preparation method and application thereof, and relates to the technical field of activity excitation and protection of probiotics, prebiotics and metabiotics. The preparation method provided by the invention comprises the following steps: freeze-drying and crushing pomelo peel white capsules to obtain pomelo peel powder; stirring and dispersing the shaddock peel powder in ethanol, separating and drying to obtain modified powder; mixing the modified powder with a ferroferric oxide nano suspension, and separating to obtain a magnetic carrier; mixing and loading the magnetic carrier and the probiotic liquid in an alternating magnetic field, and separating to obtain a probiotic carrier; mixing and adsorbing the probiotic carrier in a sodium alginate solution, and separating to obtain a gel precursor; performing ultrasonic dispersion on the gel precursor in a calcium ion solution, and performing gel shaping to obtain the high-activity synbiotic nourishment. According to the invention, not only can the shaddock peel be subjected to resource utilization, but also the damage of gastrointestinal tracts to the probiotics can be reduced, the release time of the probiotics can be delayed, and the viable bacteria quantity of the probiotics reaching the colon can be increased, so that the physiological activity of the probiotics and the bioavailability of a human body can be improved.

The invention discloses a magnetic carrier composite biological agent and a preparation method thereof. The preparation method comprises the following steps: preparing a nano magnetic carbon base; preparing a functional bacterium colony stock solution; preparing a nano magnetic carbon base / functional bacterium compound bacterium solution through the nano magnetic carbon base and the functional bacterium colony; preparing emulsified vegetable oil; preparing a magnetic carrier composite biological agent from the emulsified vegetable oil and the nano magnetic carbon-based / functional bacteria composite bacterial liquid; according to the prepared composite biological agent, the problems of insufficient tolerance under high concentration, low efficiency under low concentration, long repair period and the like of a biological method are solved at the same time, and finally efficient, long-acting and small-disturbance repair for halogenated hydrocarbon in a wide concentration range is achieved.

To provide a carrier which can obtain the high stability to the image density and developability in a long-term use and is excellent in suppression of fogging and toner scattering.SOLUTION: A magnetic carrier includes: a magnetic core; and a coating resin that coats a surface of the magnetic core, wherein the resin coating layer has a thickness of 50 nm or more, a coating resin, which forms the resin coating layer, contains a resin S having an organosilicon polymer moiety, and when a surface and a position at a depth of 20 nm from the surface of the magnetic carrier are analyzed by X-ray photoelectron spectroscopy, an amount of silicon element as determined by the analysis has a ratio within a specific range at respective positions.SELECTED DRAWING: None

The application provides a composite water purifying agent and a preparation method and application thereof, wherein the composite water purifying agent comprises the following components in mass fraction: polymeric aluminum ferric silicate 25-35 parts, graphene oxide loaded nanometer titanium dioxide 18-25 parts, chitosan quaternary ammonium salt 20-28 parts, activated carbon loaded iron and copper 12-18 parts, and magnetic carrier 5-15 parts. The composite water purifying agent has the synergistic effect of polymeric aluminum ferric silicate, graphene oxide loaded nanometer titanium dioxide and chitosan quaternary ammonium salt, and the adsorption, flocculation and degradation capacity of the water purifying agent are enhanced, so that the water purifying agent has excellent effect when treating complex wastewater.

To provide a two-component developer that can suppress the decrease in the amount of charge of the developer due to the deterioration of the developer's durability in a high-temperature, high-humidity environment. [Solution] A two-component developer containing toner particles, a magnetic carrier, and inorganic fine particles B, wherein the magnetic carrier has magnetic carrier particles having a coating resin layer covering the surface of magnetic core particles, the coating resin layer contains inorganic fine particles A, at least a portion of the inorganic fine particles A is exposed on the surface of the carrier particles, the amount of inorganic fine particles B recovered by the water washing method XB is 0.01 to 0.05 parts by mass, the compression energy of the inorganic fine particles B is 75 mJ or less, and the work function WA of inorganic fine particles A, the work function WB of inorganic fine particles B, the coverage rate by inorganic fine particles A XA, the height of the protrusions of inorganic fine particles A HA, and the number-average particle size HB of inorganic fine particles B recovered by the water washing method satisfy the following formula. 0.5 ≤ |WA - WB| ≤ 10.0 0.001 ≤ XB / XA ≤ 0.010 0.5 ≤ HB / HA ≤ 4.0

A developing apparatus for developing a latent image formed on an image bearing member includes a developer carrying member configured to carry a developer including toner and magnetic carrier and including a developer carrying surface having a plurality of grooves, a magnet, provided inside the developer carrying member, configured to attract the developer on the developing carrying surface, and a regulating member, provided spaced from the developer carrying member and configured to regulate an amount of the developer carried on the developer carrying surface.

The invention relates to the technical field of silver smelting, in particular to a method for recovering silver powder from a photovoltaic welding strip to prepare a silver ingot, which comprises the following steps of: (a) mechanically crushing the photovoltaic welding strip, and separating and removing silicon or silicon dioxide particles through high-speed airflow to obtain a crushed material; (b) adding water into the crushed material and iron powder, stirring and magnetically separating to obtain a silver-containing enriched product; (c) adding a ternary compound additive into the silver-containing concentrate, and uniformly stirring to obtain a mixture; (d) dehydrating the mixture until the water content is 15-20% to obtain a dehydrated material; and (e) loosely paving the dehydrated material, calcining at low temperature, collecting silver powder, and smelting into a silver ingot. According to the scheme, a magnetic carrier separation and composite additive cooperation strategy is adopted, fine design of process parameters and multi-link cooperation regulation and control are combined, the silver aggregation and purification efficiency is finally improved, the process adaptability is high, and silver ingots are stable in quality and more environmentally friendly.

A turnover machine for a magnetic carrier comprises a machine frame, and a feeding station, a turnover station, a detection station and a discharging station are sequentially arranged in the length extending direction of the machine frame. The conveying assembly is arranged at the upper end of the rack, a magnetic tray is arranged at the upper end of the rack, the magnetic tray is connected to the conveying assembly, and the conveying assembly is used for driving the magnetic tray to sequentially pass through the feeding station, the overturning station, the detection station and the discharging station; the feeding mechanism is arranged on the feeding station; the turnover mechanism is arranged at the turnover station, and the turnover mechanism is arranged adjacent to the feeding mechanism and used for turning over the products in the magnetic trays; the detection mechanism is arranged at the detection station, and the detection mechanism is arranged above the conveying assembly and used for detecting the overturned products; and the discharging mechanism is arranged at the discharging station. By the adoption of the structure, automatic feeding of products is completed, the magnetic carriers with the products are automatically conveyed, overturned and discharged, and the production efficiency of the products is improved.

An analysis method includes: an inflow process of a solution containing a test object, a magnetic support on the surface of which a complex including an antibody labeled with a luminescent agent and recognizes the test object is formed, and a reaction aid to assist reaction of the luminescent agent in a flow cell; a process of capturing the magnetic support over a working electrode by a magnetic field; a process of making the luminescent agent illuminate by applying a voltage to the working electrode; and a process of measuring an amount of luminescence of the luminescent agent. The luminescent process includes: luminescence from action of a first neutral radical, produced from the reaction aid through a cation radical; and luminescence from action of a second neutral radical, produced not through a cation radical, on the luminescent agent. This increases the luminous efficiency of ECL and enhances detection sensitivity.

The present invention discloses a preparation method of a functionalized magnetic carbon nanotube-loaded hollow nanosphere composite adsorbent and its application in uranium extraction. The "ouzo" effect, that is, after a Tris aqueous solution is mixed with n-propanol, air overflows in the form of nanobubbles due to the difference in solubility. Dopamine oxidatively self-polymerizes to form hollow polydopamine nanospheres while forming a polydopamine coating on the carrier, giving the entire material surface chemical modification advantages. First, the free radicals of polydopamine itself are used to modify the cyanide group based on distillation precipitation free radical polymerization, and then m‑CNTs@H‑PDA‑AO is prepared after amidoximation. The hollow material is constructed based on the "ouzo" effect, which is green and environmentally friendly; and the magnetic carrier gives the adsorbent the characteristic of rapid solid-liquid separation. The adsorption results show that m‑CNTs@H‑PDA‑AO can reach adsorption saturation (50 mL) within 1.0 h, and the maximum adsorption capacity at room temperature is 381.98 mg·g ‑1 ; It has a specific adsorption capacity for uranyl ions, and five cycle regeneration experiments have proved that the adsorption of uranium on its surface is reversible and has good regeneration performance.

The application discloses a magnetic carrier catalyst, a preparation method and application thereof. The magnetic carrier catalyst comprises a magnetic core, a dense PDA coating layer coated on the magnetic core, and an active component supported on the dense PDA coating layer; and the dense PDA coating layer is formed by coating and densification treatment of polydopamine (PDA). The application prepares a dense coating layer on the surface of the magnetic core. Compared with a traditional porous structure and a porous carrier, when the active component is supported, the active component is not wrapped into the inside of the channel, but is only supported on the surface, so that the loading amount of the noble metal catalyst is reduced by several times or orders of magnitude, the catalyst still has high activity even when the loading amount of the active component is very low, and the hydrogenation degree can reach more than 90%. Because the active component is several to tens of nanometers in size and structure, the hydrogenation activity is high, and the catalyst can be fully recovered by magnetic force, so that the use cost of the catalyst is low.

This invention discloses a magnetically supported catalyst, its preparation method, and its applications. The magnetically supported catalyst comprises a magnetic core, a dense coating layer covering the magnetic core, and an active component supported on the dense coating layer. The dense coating layer includes at least one dense polymer layer; or it may also include at least one carbon layer, with the outermost layer being a dense polymer layer. The carbon layer is formed by coating and carbonizing a carbon source or vinylpyrrolidone; the dense polymer layer is formed by coating and densifying polyvinylpyrrolidone. This invention prepares a densely structured coating layer on the surface of the magnetic core. Compared with traditional porous supports, when supporting the active component, it does not trap it inside the pores, but only supports the active component on the surface, reducing the loading of noble metal catalysts by several times or orders of magnitude. Simultaneously, because the active component has a structure at the scale of several to tens of nanometers, it exhibits high hydrogenation activity and can be completely magnetically recovered, resulting in low catalyst usage costs and low impurity content in the hydrogenation product HNBR.

The application provides a double-period undulator, which comprises upper and lower magnetic carrier structures that can move relative to each other, two magnet array structures fixed on the lower magnetic carrier structure, and two magnet array structures fixed on the upper magnetic carrier structure, wherein the four magnet array structures form a first and a second undulator; the relative positions of the four magnet array structures in the z direction are such that when the two magnet array structures of one of the first and second undulators are aligned and work, the two magnet array structures of the other one are in positions that are staggered with each other in the z direction and can generate repulsive force, and the z direction is the beam propagation direction of the double-period undulator. The double-period undulator of the application generates repulsive force when two of the four magnet array structures are staggered to compensate for the attractive force of the aligned magnet array structures, thereby reducing the magnetic force load of the undulator based on magnetic force compensation, reducing the overall volume of the undulator, and expanding the energy range of the radiated photons under the same undulator volume.

To provide a magnetic carrier for electrostatic charge image development that suppresses a decrease in image density due to an excessive increase in the charge amount of a toner in a low-humidity environment and suppresses contamination in an image forming apparatus due to toner scattering caused by a decrease in the charge amount of the toner in a high-humidity environment.SOLUTION: The magnetic core particle is a particle having a silicone resin on the surface thereof, and the coating resin layer is a layer containing a vinyl resin as a binder resin and containing a silica particle, the M1 and the M2 satisfy the following formula (1), where M1 is a mass of the toner after the toner is stored in a first environmental condition at a temperature of 30 °C and a humidity of 80% for 5 hours, and M2 is a mass of the toner after the toner is stored in a second environmental condition at a temperature of 23 °C and a humidity of 5% for 5 hours. 0.055 ≤ (M1-M2) / M1 * 100 ≤ 0.200 Formula (1) SELECTED DRAWING: Figure 1