56 results about "Paramagnetism" patented technology

The invention provides a paramagnetic micro-nano magnetic particle magnetophoresis separation device and a paramagnetic micro-nano magnetic particle magnetophoresis separation method, and relates to the technical field of micro-nano magnetic particle separation and magnetic labeled biomolecule separation analysis. The separation device comprises a plurality of permanent magnets which have the same magnetism and the same size and are arranged above the separation channel at intervals in the direction of the separation channel, and a plurality of sets of mechanical structures which respectively drive each permanent magnet to move up and down in the vertical direction; the Hall sensor clings to the separation channel and is used for detecting the magnetic induction intensity at the separation channel; a liquid inlet device; a UV / Vis ultraviolet-visible light detector; a collection device and a computer. The magnetic induction intensity in the separation channel can be set, the critical diameter of the micro-nano magnetic particles capable of being captured by the magnetic field is determined, magnetophoresis separation of paramagnetic micro-nano magnetic particles is accurately achieved, the controllability of the magnetophoresis separation process is enhanced, and the separation effect of the micro-nano magnetic particles is improved.

A probe for use with a tank having a wall pierced by an orifice and configured to contain a fluid containing paramagnetic particles. The probe comprises a magnet, a displacement system arranged at the orifice to displace the magnet from a capturing position in which the magnet is bathed in the fluid to a checking position in which the magnet is outside of the tank, and a seal ensuring the seal-tightness of the orifice in the transition from the capturing position to the checking position and vice versa.

An object of the present application is to provide a magnetic particle including a secondary particle in which a plurality of primary particles are aggregated, each primary particle having a particle diameter deemed to exhibit superparamagnetism, and the secondary particle exhibiting a larger particle diameter. [Solution] This object is achieved by magnetic particles including secondary particles in which a plurality of primary particles are aggregated, in which the secondary particles have an average particle diameter of 500 nm or more and 5000 nm or less, and in which the plurality of primary particles have an average particle diameter of 2 nm or more and 20 nm or less.

This invention discloses a method for enhancing the uranium separation efficiency of commercial iron powder using an external field, comprising: adding commercial iron powder to a reactor containing fluorine- and uranium-containing wastewater; applying an external weak magnetic field or magneto-optical coupling; and performing uranium separation treatment on the fluorine- and uranium-containing wastewater under continuous stirring. This invention magnetizes the commercial iron powder by introducing a weak magnetic field, thereby attracting Fe... 2+ Migration disrupts the passivation layer on the surface of iron powder, promoting the reaction of U(VI) with Fe. 0 The redox reaction simultaneously strengthens the affinity between the magnetized iron powder particles and the paramagnetic O2 molecules, leading to the formation of γ-FeOOH nanosheets with a high specific surface area on the iron powder surface. The γ-FeOOH surface is rich in oxygen-containing functional groups, which achieve U(VI) separation through the bonding of -OH groups with U(VI). This invention, based on a weak magnetic field, further improves the separation efficiency of commercial iron powder for U(VI) in fluoride- and uranium-containing wastewater by coupling with an optical field.

A kind of abrasive particle multi-parameter on-line monitoring device and method, belong to mechanical equipment wear monitoring technical field, including inductance monitoring module, imaging monitoring module, paramagnetic magnetophoresis separation device, collection cleaning device, system processor.Inductance monitoring module detects the magnetic field disturbance generated when abrasive particle passes, obtains the size, number and ferromagnetic property of abrasive particle, is transmitted to system processor;Imaging monitoring module is triggered according to the inductance pulse signal of inductance monitoring module by system processor, and the shape and size information of abrasive particle are obtained by imaging abrasive particle;Paramagnetic magnetophoresis separation device is used to separate paramagnetic and diamagnetic abrasive particle, and is connected with collection cleaning device.The present application can obtain the information of multiple abrasive particles simultaneously, has the advantages of anti-bubble interference, high response sensitivity, can distinguish paramagnetic and diamagnetic, can multiple information authentication, etc.;The specific occurrence site of mechanical fault and its severity, wear mechanism can be analyzed and confirmed, to ensure that equipment is safe and efficient operation.

The invention relates to a needle assembly and a system including the same. A needle assembly includes a needle including an elongate shaft having a diameter dimensioned for insertion into an intravenous catheter, an outer surface, a distal tip, and a proximal end, at least a portion of the elongate shaft having a first magnetic region and a discontinuity located in the first magnetic region, the discontinuity provides a region of increased diameter relative to the diameter of the elongate shaft, the discontinuity comprising a magnetic adhesive wherein a first magnetic region is placed at a known location at a fixed distance from the distal tip, the magnetic field strength and vector of the first magnetic region being detected by a magnetometer, the first magnetic region and the second magnetic region are positioned to provide a position of the distal tip of the elongate shaft based on the position of the first magnetic region and the corresponding fixed distance, where the magnetic adhesive increases a diameter of the elongate shaft, where the magnetic adhesive is disposed on an outer surface of the elongate shaft, and where the adhesive includes an additive selected from the group consisting of paramagnetic additives, ferromagnetic additives, and combinations thereof.

The utility model relates to the technical field of neutron scattering, in particular to a neutron scattering sample environment device. The neutron scattering sample environment device comprises a first container, a second container and a connecting piece, the first container and the second container are provided with inner cavities, the inner cavities are used for being filled with paramagnetic materials, and the first container and the second container are used for being arranged at the first end and the second end of a sample tube respectively and are provided with heat conduction faces making contact with the sample tube to conduct heat. The connecting piece is connected between the first container and the second container so as to clamp and fix the sample tube. According to the neutron scattering sample environment device, the containers are provided with the inner cavities for containing the paramagnetic materials, the two containers are located at the two ends of the sample tube respectively and clamp and fix the sample tube, and the containers make full contact with the sample tube, so that heat conduction is facilitated; the whole device is put into a superconducting magnet, and the paramagnetic material is magnetized and demagnetized, so that an ultralow-temperature environment can be provided for a sample in the sample tube.

This invention discloses a magnetic array-enhanced non-metallic alkaline water hydrogen production electrolyzer, which is constructed by stacking and sealing anode plates, cathode plates, and electrolytic bipolar plates with gaskets and diaphragms layer by layer. Each anode plate, cathode plate, and electrolytic bipolar plate includes a non-metallic frame, a graphite liner, a cylindrical permanent magnet array, and nickel foam electrodes. The magnet array is positioned between the graphite liner and the nickel foam electrodes. The electrolytic bipolar plates and end plates enclose an electrolysis chamber, and the number of bipolar plates can be increased or decreased as needed. This invention utilizes a cylindrical permanent magnet array to construct a high-field, strong gradient magnetic field, leveraging oxygen paramagnetism to achieve efficient bubble desorption and enhance the oxygen evolution reaction rate. A star-shaped flow field structure fills the gaps in the magnet array, optimizing electrolyte distribution and enhancing mass transfer efficiency, effectively improving the hydrogen production performance and electrolysis efficiency of the electrolyzer.

The application is based on a cement-based material original state pore measurement method based on low-field magnetic resonance longitudinal relaxation technology, which overcomes the technical bottlenecks of traditional magnetic resonance test methods in signal acquisition integrity, rapid relaxation signal capture and longitudinal surface relaxation strength determination by optimizing the acquisition and processing technology of longitudinal relaxation signals, and realizes the accurate detection of the pore structure of cement-based materials from the nanometer scale to the micron scale. Compared with the traditional transverse relaxation method, the method of the application is not disturbed by paramagnetic substances when testing ferrosilicate cement-based materials, and has higher applicability and accuracy. Overall, the application can non-destructively, accurately and accurately characterize the pore distribution characteristics of cement-based materials without drying pretreatment of the sample, providing a scientific basis for optimizing the performance of cement-based materials and improving the level of engineering quality control, and effectively promoting the further development of pore structure test technology in the fields of building engineering and material science.

A wafer testing cassette is provided. The wafer testing cassette includes a first housing, a second housing and a magnetic force generating assembly. The first housing include a probe card, the probe card includes at least one probe having a paramagnetic property. The second housing is combined with the first housing and has a magnetic force generating assembly arranged corresponding to the at least one probe. A wafer located in the second housing, and the at least one probe electrically contacts at least one pad of the wafer with a predetermined contact force. When the magnetic force generating assembly is configured to generate a first magnetic attraction force, the magnetic force generating assembly attracts the at least one probe, so that the at least one probe electrically contacts the at least one pad with a first contact force which is greater than or equal to the predetermined contact force.

In one aspect, a method of extracting a target analyte from a sample for introduction into a mass spectrometer is disclosed, which includes mixing the sample with a paramagnetic medium to form a mixture, subjecting the mixture to a magnetic field gradient to form a non-homogenous distribution of at least one of the analyte and at least one interfering component of the sample, if any, thereby enhancing a concentration of the target analyte within a spatial location of said mixture, extracting at least a portion of the target analyte from that spatial location, and introducing at least a portion of the extracted target analyte into said mass spectrometer.

The invention belongs to the field of environmental monitoring, and discloses a preparation method of a nickel-based electrode with a spin pinning effect and application of the nickel-based electrode in chemical oxygen demand detection. A nickel substrate is subjected to ultrasonic treatment through hydrochloric acid and an organic solvent, cleaned and dried, a precursor layer is formed on the surface of the nickel substrate through an electro-deposition method or a hydrothermal method or an impregnation method, the precursor layer is converted into an antiferromagnetic or paramagnetic metal oxide layer through oxidation treatment, and the electrode with the spin pinning effect is prepared. The electrode is used as a working electrode in COD detection, under the action of an external magnetic field, a three-electrode system is used for electrochemical detection, and rapid and accurate determination of COD in a water body is realized. The preparation method of the nickel-based electrode with the spin pinning effect has the advantages of being simple and easy to operate and suitable for large-scale production, the stability and sensitivity of COD detection are further improved, and an efficient and reliable novel method is provided for water COD detection.

The invention discloses an abrasive particle multi-parameter online monitoring device and method, and belongs to the technical field of mechanical equipment wear monitoring, and the abrasive particle multi-parameter online monitoring device comprises an inductance monitoring module, an imaging monitoring module, a parametric diamagnetic magnetophoresis separation device, a collecting and cleaning device and a system processor. The inductance monitoring module detects magnetic field disturbance generated when the abrasive particles pass through, obtains the sizes, the number and the ferromagnetic properties of the abrasive particles and transmits the sizes, the number and the ferromagnetic properties to the system processor; the imaging monitoring module is triggered by the system processor according to the inductance pulse signal of the inductance monitoring module to image the abrasive particles and obtain the shape and size information of the abrasive particles; and the paramagnetic and diamagnetic magnetophoresis separation device is used for separating paramagnetic and diamagnetic abrasive particles and is connected with the collecting and cleaning device. According to the invention, information of a plurality of abrasive particles can be obtained at the same time, and the method has the advantages of bubble interference resistance, high response sensitivity, capability of distinguishing paramagnetism, capability of multi-information verification and the like; the method can analyze and confirm the specific occurrence part, the severity and the abrasion mechanism of the mechanical fault, and guarantees the safe and efficient operation of the equipment.

The invention relates to the field of magnetic resonance imaging. The invention relates to a nanovector comprising: - an external layer comprising a plurality of amphiphilic molecules, said amphiphilic molecules comprising at least one hydrophobic moiety linked to at least one hydrophilic moiety, and - a core comprising at least one organometallic complex having a paramagnetic property that can be activated by oxidation, said organometallic complex being functionalized by at least one hydrophobic moiety, the oxidation of the organometallic complex being controllable by light. The invention also relates to a method of magnetic resonance imaging.

The invention relates to an axial flux motor made of paramagnetic material, the rotor and the stator of which consist of respective discs carrying opposite permanent magnets of opposite polarity and having a certain inclination, thereby generating tangential repulsive force components causing the rotor to make an angular movement. The motor has specific features including an adjustment device for adjusting the relative position between the two discs forming the rotor and the stator so that the start and stop of the motor and the different rotational speeds provided by the motor can be controlled.

The utility model discloses magnetic density separation equipment for classifying electronic waste particles, which relates to the technical field of electronic waste treatment and comprises a bottom plate, and four supporting legs and two supporting plates are fixedly connected to the upper surface of the bottom plate. Superconducting magnets fixed to the supporting legs at the corresponding positions and a plurality of rotating rods rotationally connected with the supporting plates at the corresponding positions are arranged above the bottom plate. According to the device, various metals mixed in electronic wastes can be effectively separated at the same time through the paramagnetism of the magnetic fluid and the density difference of different metals, compared with other traditional schemes, the process steps are greatly shortened, and compared with a traditional method depending on chemical reagents or high-temperature smelting, physical separation does not need to use strong acid, cyanide or high temperature, and the cost is reduced. Separation is achieved only through physical fields such as a magnetic field and water flow, so that emission of toxic waste water and waste gas is remarkably reduced, the environmental protection treatment cost of enterprises is reduced, and meanwhile workers are prevented from making direct contact with heavy metal and harmful chemical substances.

The application provides a method for simultaneously improving the magnetic performance and mechanical performance of a neodymium-iron-boron magnet. In the rapid solidification stage, paramagnetic nanorod-shaped refractory particles are uniformly added and mixed into the neodymium-iron-boron alloy liquid by high-pressure injection, thereby obtaining alloy powder doped with the paramagnetic nanorod-shaped refractory particles, so that the paramagnetic nanorod-shaped refractory particles can be randomly distributed between the main phase grains of the sintered neodymium-iron-boron alloy, thereby generating rod-shaped second-phase substances in situ in the grain boundary phase, isolating the demagnetization coupling effect between the main phase grains, and improving the coercivity. In the application, the rod-shaped phase distributed between the main phase grains of the neodymium-iron-boron alloy can hinder the propagation of cracks, delay the transmission rate of cracks by using its dispersed distribution and refractory characteristics, and consume the energy transmission inside the magnet, thereby simultaneously improving the mechanical performance of the magnet along the magnetization axis and the non-magnetization axis direction, and increasing the material strength and toughness.

The invention relates to a magnetic field sensor (15) for measuring a differential current, intended to withstand a magnetic field to be measured generated by the induction of a current flowing through at least two primary conductors, at least a portion of which extends according to an axis (Z), said current flowing through at least one primary conductor (4a) in a forward direction according to said axis (Z), and flows through at least one of the primary conductors (4b) in a reverse direction opposite to the forward direction. The sensor is characterized in that it comprises: an inner magnetic circuit (16) configured to form a closed profile around the primary conductor; an outer magnetic circuit (17) surrounding the inner magnetic circuit (16); at least one SPM superparamagnetic material coil (18) arranged between the inner magnetic circuit (16) and the outer magnetic circuit (17).

The demonstration device for the magnetic susceptibility difference of different fluid substances in the magnetic field comprises a support, a container supporting disc, a magnet disc, a powerful magnet, a supporting rod, an equipment support, a glass container and video recording equipment, the container supporting disc is installed on the upper portion of the support, and the glass container is arranged on the container supporting disc. Multiple layers of magnet disc height adjusting supporting blocks are symmetrically arranged on the two sides of the lower portion of the support respectively, the magnet disc is erected on the two magnet disc height adjusting supporting blocks of any layer height, the powerful magnet is located below the glass container and installed on the magnet disc, and the bottom of the supporting rod is installed on one side of the support. One end of the device support is in threaded connection with the top of the supporting rod through a bolt and nut assembly I. The video recording device is installed at the other end of the device support. According to the utility model, the paramagnetism and diamagnetism phenomena of different fluid substances can be effectively detected and analyzed, and a simple, visual and accurate means is provided for the research of the magnetic characteristics of the fluid substances.

The utility model discloses an adjustable ankle fixator for nuclear magnetism, which comprises a bottom plate, an adjusting device and an ankle fixing device, the adjusting device comprises a first mounting plate, a second mounting plate, a first adjusting component, a mounting frame and a second adjusting component, and the first mounting plate and the second mounting plate are respectively arranged at two ends of the bottom plate in a fixed manner; the first adjusting assembly is movably arranged on the first mounting plate; the mounting frame is movably arranged on the first adjusting assembly; and the second adjusting assembly is movably arranged on the second mounting plate. Therefore, through the design of the adjusting device and the ankle fixing device, the ankle is well fixed and flexibly adjusted, movement of a patient during examination is reduced, the components are made of non-paramagnetic materials, the magnetic field uniformity is prevented from being affected, normal scanning is guaranteed, the image quality is improved, the ankle fixator can be attached to the ankle joint to assist scanning at various angles, and the ankle fixing device is convenient to use. And the device is suitable for different coils and can meet various clinical requirements.

The present invention provides an electrolytic cell suitable for electrolysing certain inorganic compounds of alkali and alkaline earth (Group 1 and Group 2) metals in their molten state. The cell (100) comprises a vessel (102) for containing a molten electrolyte, an anode (10) and a cathode (70) both inside the vessel (102), and a source (20) of a magnetic field having a gradient with a positive component in a direction (– x) from the anode (10) to the cathode (70), such that the strength of the magnetic field increases from the anode (10) to the cathode (70). The rest of the electrolytic cell (100), apart from the source of the magnetic field, including at least both the vessel (102) and the anode (10), consists of material having a magnetic susceptibility with an absolute value of less than 10-2. Thus the rest of the electrolytic cell, which is made of diamagnetic and / or paramagnetic material(s), does not affect the magnetic field between the anode (10) and the cathode (70) to any appreciable extent in comparison to the same magnetic field in free space. The source of the magnetic field between the anode (10) and the cathode (70) may either be a permanent magnet (20) located outside the vessel (102) adjacent to the cathode (70), or it may be provided by permanently magnetizing the cathode (70) itself. In the latter case, the cathode comprises an electrically conducting "hard" ferromagnetic material with a high Curie temperature. In the former case, the cathode instead consists of an electrically conducting material also having a magnetic susceptibility with an absolute value of less than 10-2, so as not to affect the magnetic field from the permanent magnet (20) located outside the vessel (102). In either case, if such a cell (100) is used to electrolyse a halide of an alkali metal, a halide of an alkaline earth metal except beryllium or a hydroxide of an alkali metal in their molten state, the magnetic field between the anode (10) and the cathode (70) inhibits a back-reaction between the electrolysis products formed at the anode (10) and cathode (70), thereby improving the energy efficiency of the cell. A plurality of such cells (100) may also be arranged with just one permanent magnet (20) as the source of the magnetic field between the anode (10) and cathode (70) inside the respective vessels (102) of two adjacent electrolytic cells (100), thereby halving the total number of magnetized components which are used. [Fig. 4A]

The application discloses a method for extracting organic carbon in low-organic-carbon soil 13 The application discloses a method for enhancing C nuclear magnetic resonance (NMR) signal, belonging to the technical field of chemical detection. The method removes paramagnetic substances and part of minerals in a soil sample by using a hydrofluoric acid (HF) solution, and washes away the excess acid in the sample by water; the mineral residues and organic matter sample are layered by centrifugation combined with low-temperature drying or freeze-drying; finally, the mineral residues are further removed by 'tilting-separating-collecting' and'reciprocating-separating-collecting', so as to realize high concentration of organic carbon, increase the NMR signal strength and signal-to-noise ratio, improve the spectrum quality, and shorten the machine time.

The application relates to a construction method of a magnetic relaxation sensing technology detection probe, which comprises the following steps: mixing paramagnetic graphene quantum dot dispersion liquid and antibody dispersion liquid, and irradiating the mixture with ultraviolet light to obtain a magnetic relaxation sensing technology detection probe. The application has the advantages of rapid construction (within 1 hour), simple operation, no need for complicated activation treatment and impurity removal post-treatment, and the obtained detection probe has the advantages of strong stability and strong specificity. The specific detection probe can be quickly constructed under the condition that there is no specific magnetic relaxation sensing detection probe for a specific marker, and the detection period of the magnetic relaxation sensing technology is shortened.

This invention relates to the fields of oral medicine and nanomaterials, and particularly to a magneto-optical dual-response material, its preparation method, and its applications. The magneto-optical dual-response material comprises a magnetic response core, a biomimetic mineralization layer modified on the surface of the magnetic response core, and a photoresponsive outer layer modified on the surface of the biomimetic mineralization layer. The magnetic response core comprises superparamagnetic magnetite dendrites; the biomimetic mineralization layer comprises a hydroxyapatite nanocrystal array; and the photoresponsive outer layer comprises nanoenzymes. The magneto-optical dual-response material provided by this invention integrates magnetic targeting and mechanical removal of biofilms, near-infrared light synergistic sterilization, and biomimetic remineralization functions, aiming to overcome the passivity and limitations of existing technologies and achieve proactive, precise, and integrated prevention and treatment of early pit and fissure caries.

A computer-implemented method for operating a magnetic resonance device, the method including: acquiring, as part of an examination process, magnetic resonance data describing diffusion and / or perfusion in a target area of a subject under examination in which an exogenous paramagnetic contrast agent is present, using a magnetic resonance sequence; and prior to at least one acquisition period in which magnetic resonance data of a dynamic data set is acquired using the magnetic resonance sequence, outputting an additional magnetic gradient field to generate a magnetic movement force that acts on the contrast agent to introduce kinetic energy into the target area, wherein the additional magnetic gradient field is output separately from pulses of the magnetic resonance sequence.

The present invention provides an electrolytic cell suitable for electrolysing certain inorganic compounds of alkali and alkaline earth (Group 1 and Group 2) metals in their molten state. The cell (100) comprises a vessel (102) for containing a molten electrolyte, an anode (10) and a cathode (70) both inside the vessel (102), and a source (20) of a magnetic field having a gradient with a positive component in a direction (– x) from the anode (10) to the cathode (70), such that the strength of the magnetic field increases from the anode (10) to the cathode (70). The rest of the electrolytic cell (100), apart from the source of the magnetic field, including at least both the vessel (102) and the anode (10), consists of material having a magnetic susceptibility with an absolute value of less than 10-2. Thus the rest of the electrolytic cell, which is made of diamagnetic and / or paramagnetic material(s), does not affect the magnetic field between the anode (10) and the cathode (70) to any appreciable extent in comparison to the same magnetic field in free space. The source of the magnetic field between the anode (10) and the cathode (70) may either be a permanent magnet (20) located outside the vessel (102) adjacent to the cathode (70), or it may be provided by permanently magnetizing the cathode (70) itself. In the latter case, the cathode comprises an electrically conducting "hard" ferromagnetic material with a high Curie temperature. In the former case, the cathode instead consists of an electrically conducting material also having a magnetic susceptibility with an absolute value of less than 10-2, so as not to affect the magnetic field from the permanent magnet (20) located outside the vessel (102). In either case, if such a cell (100) is used to electrolyse a halide of an alkali metal, a halide of an alkaline earth metal except beryllium or a hydroxide of an alkali metal in their molten state, the magnetic field between the anode (10) and the cathode (70) inhibits a back-reaction between the electrolysis products formed at the anode (10) and cathode (70), thereby improving the energy efficiency of the cell. A plurality of such cells (100) may also be arranged with just one permanent magnet (20) as the source of the magnetic field between the anode (10) and cathode (70) inside the respective vessels (102) of two adjacent electrolytic cells (100), thereby halving the total number of magnetized components which are used.

A superconducting generator includes an armature configured to rotate about a shaft and a stationary field arranged concentrically and radially outward from the armature. The stationary field comprises a superconducting field winding and a vacuum chamber with an inner wall of nonmagnetic or paramagnetic material facing the armature, an opposing outer wall of ferromagnetic material, and several side walls connecting the inner wall to the opposite outer wall. The superconducting field winding is arranged within the vacuum chamber. A wind turbine and a method are also described. The wind turbine includes a rotor with several blades. The wind turbine also includes a shaft coupled to the rotor. Furthermore, the wind turbine includes the superconducting generator coupled to the rotor via the shaft.