110results about How to "Fast signal response" patented technology

The invention discloses a low-noise micro plane fluxgate sensor based on main and auxiliary coil double incentive. The low-noise micro plane fluxgate sensor based on the main and auxiliary coil double incentive comprises a substrate, main incentive coils, auxiliary incentive coils, detecting coils, a magnetic core, electrodes and a polyimide film. Two ends of each of two long shafts of the magnetic core are symmetrically provided with two groups of the main incentive coils in a wound mode, wherein the two long shafts are arranged in parallel. The middle portions of the long shafts are symmetrically provided with three groups of the detecting coils and two groups of the auxiliary incentive coils in a wound mode. In the same long shaft, one group of the auxiliary incentive coils are arranged between each two groups of the detecting coils. The main incentive coils, the auxiliary incentive coils and the detecting coils are all arranged on the surface of the substrate. Two ends of each main incentive coil are connected with the electrodes. The low-noise micro plane fluxgate sensor based on the main and auxiliary coil double incentive solves the problems that a traditional fluxgate sensor is poor in manufacturing stability and repeatability, utilizes the main and auxiliary coil double incentive to improves the incentive efficiency of the micro fluxgate sensor, effectively lowers output signal noise and energy consumption, is capable of being manufactured together with an interface circuit in an integrated mode, and can be widely used in many novel fields.

The invention discloses a method for measuring the content of arsenic in edible oil by utilizing a super-microwave digestion graphite furnace atomic absorption spectrometry. The method disclosed by the invention comprises the following steps: performing super-microwave digestion on an edible oil sample by adopting a transparent and stable quartz tube, and measuring the content of the arsenic in the edible oil by utilizing the graphite furnace atomic absorption spectrometry. According to the method, a super-microwave technology is applied to measuring the trace arsenic in the edible oil, the operation is safe and easy, the digestion capacity is high, the edible oil samples can be simply and efficiently digested, the target analyte loss and pollution caused by the transfer process can be effectively eliminated, potassium borohydride and other substances with high toxicity are not needed, and the graphite furnace atomic absorption spectrometry is further combined to be applied to measuring the trace arsenic in the edible oil. According to the method disclosed by the invention, the linearity range ranges from 0 to 40ng/mL, the quantification limit is 0.033mg/kg, and the recovery rate is 86.8-101.4 percent. The operation is easy, accurate, rapid and sensitive, the content of the arsenic in the edible oil can be accurately measured, and the body health of consumers can be effectively guaranteed.

A method for simultaneously determining three isomers of nitro-phenol includes coating the dressing agent on vitreous carbon electrode first and obtaining dressed electrode by infrared lamp-drying, carrying out circulation VA scanning on dressed electrode in three isomers mixed solution of nitro-phenol to obtain VA curve of primary differential linear scanning and relation curve diagram of each nitro-phenol concentration to peak current then substituting measured values in standard curve equation to calculate out concentration of each nitro-phenol.

The invention discloses a method for manufacturing an immunosensor for detecting chlorpyrifos, which belongs to the technical field of biologic sensor manufacturing. The method comprises the following steps: dropwise coating the surface of a naked glassy carbon electrode, which is subjected to cleaning, activation and performance testing, with a nickel aluminum hydrotalcite-graphene compound liquid, subsequently modifying by hollow nanogold, further fixing a chlorpyrifos monoclonal antibody on the modified electrode, and finally, sealing by bovine serum albumin. The immunosensor manufactured by the method has the characteristics of high sensitivity, low cost, high detection speed, good stability and high sample recycling rate. The detection limit of the immunosensor manufactured by the method can be 0.052ng/L, the linear range of the immunosensor is 5ng/mL-2 micrograms/mL, the recycling rate of the immunosensor can be 82.0-118.0%, and therefore the immunosensor is applicable to rapid detection on the residual amount of chlorpyrifos in fruits and vegetables.

The invention discloses a photoelectrochemical detection method for the concentration of chloride ions in a water body. According to the chloride ion photoelectrochemical detection method provided bythe invention, a bismuth-based compound film is used as a working electrode, a three-electrode system is constructed by the bismuth-based compound film, an auxiliary electrode and a reference electrode, and a heterostructure formed by BiOCl generated on the surface of an electrode material in situ and an original electrode material has enhanced photoresponse current under illumination. The determination of the concentration of the chloride ions in the water body is realized by utilizing the one-to-one correspondence relationship between the photoresponse current and the concentration of the chloride ions in the water body. The chloride ion detection method provided by the invention is environment-friendly, simple to prepare, low in cost, high in sensitivity, strong in selectivity and widein detection range, and can be widely applied to detection of the concentration of chloride ions in media such as water bodies and human blood.

The invention discloses a composition and a kit for detecting the content of donkey hide source component in tortoise shell gelatin, deer horn gelatin and fake gelatin, and a detection method thereof. The composition comprises polypeptide I, polypeptide II, polypeptide III and control detection matrix, wherein the amino acid sequence of the polypeptide I is shown as SEQ ID NO.1, the amino acid sequence of the polypeptide II is shown as SEQ ID NO.2, the amino acid sequence of the polypeptide III is shown as SEQ ID NO.3, and the control detection matrix is fishskin gelatin. The detection value of the polypeptide II is subtracted from the detection value of the polypeptide I, and the detection deviation can be corrected by utilizing the detection value of the polypeptide III, so that the detection of content of donkey hide source component in the tortoise shell gelatin, deer horn gelatin and fake gelatin can be realized. The method has the advantages of being accurate in content detection, and simple to operate, and has wide application prospects on the true and false identification aspect of tortoise shell gelatin, deer horn gelatin and fake gelatin.

The invention discloses a preparation method of an aptamer sensor for pesticide detection, and belongs to the technical field of safety detection of agricultural products. The preparation method provided by the invention comprises the following steps: drop-coating carbon black-chitosan compound liquid on a surface of a bare glassy carbon electrode after cleaning, activation and performance testing; then, modifying with a graphene oxide-iron oxide compound; immobilizing a pesticide aptamer on the modified electrode; and finally, closing with bovine serum albumin. The aptamer sensor prepared in the invention has characteristics of high sensitivity, low cost, high detection speed, good stability and high sample recovery rate, has a detection limit of 0.033 ng/mL, a linear range of 0.1-105 ng/mL, a recovery rate of 96.0-106.0%, and is suitable for rapid detection of pesticide residues in fruits and vegetables.

The invention discloses a preparation method of a molecularly imprinted photo-electrochemical sensor based on N,S-CDs/CuPc composite material and an application in detection of ochratoxin A (OTA). Onthe basis of the synergistic effect of the co-doping of nitrogen and sulfur and non-covalent functionalization method, the energy level of the carbon point is adjusted correctly, the tight interface contact is optimized, the light absorption range is extended, and the charge transfer efficiency is enhanced to prepare the N,S-CDs/CuPc composite material; and then with combination of the molecular imprinting technology, a molecularly imprinted photo-electrochemical sensor is prepared successfully. According to the invention, the prepared sensor uses the composite material formed by N,S-CDs and CuPc as a photoelectric conversion layer; and the OTA detection is realized by surface modification of a molecularly imprinted membrane containing a toxin recognition site. The sensor has advantages ofwide detection range, high selectivity, and high sensitivity; the detection limit reaches up to 0.51pg.mL<-1>; and the sensor also has stable response and high reproducibility.

The invention relates to the field of trace sulfur ion (S<2->) analysis and detection, and particularly discloses a sulfur ion concentration visualization and photoelectrochemical detection method. The method comprises the following steps: putting a sensing material coated with an active film into a to-be-detected solution containing sulfur ions for pretreatment; and then detecting the pretreatedsensing material by adopting a visual colorimetric method or a photoelectrochemical method to obtain the ion concentration of S<2-> in the to-be-detected solution. The active thin film is made of a metal oxide or a heterojunction formed by the metal oxide and other semiconductor metals; the chemical formula of the metal oxide is MxOy-z. According to the invention, the active film of the metal oxide and the heterojunction thereof is innovatively used as a sensing material; innovatively, the mutual surface action between the sensing material and the S<2-> in the solution accidentally has excellent linear interrelation in the aspects of visual colorimetry and photoelectrochemistry, and the visualization of the S<2-> in the solution and the rapid, accurate and low-limit measurement of the photoelectrochemistry can be realized.

The invention discloses a composition, a kit and a detection method for identifying the authenticity of colla corii asini. The composition is prepared from polypeptide I, polypeptide II, polypeptide III and a reference substance detection substrate, wherein the amino acid sequence of the polypeptide I is as shown in SEQ ID No. 1, the amino acid sequence of the polypeptide II is as shown in SEQ ID No. 2, the amino acid sequence of the polypeptide III is as shown in SEQ ID No. 3, and the reference substance detection substrate is fish-skin gelatin. The composition can be used for detecting the content of a donkey skin-derived component in the colla corii asini, thus judging the authenticity of the colla corii asini. Specifically, a detection value of the polypeptide II is subtracted from a detection value of the polypeptide I, and a detection error is corrected by a detection value of the polypeptide III, so that the content of the donkey skin-derived component in the colla corii asini can be detected, and the authenticity of the colla corii asini can be identified according to the content of the donkey skin-derived component. The method has the advantages of accurate content detection and simple operation, thus having wide application prospect in the aspect of authenticity identification of the colla corii asini.

The invention relates to a metal semiconductor composite super resolution film and a preparation method thereof. The film is a metal semiconductor composite film formed by depositing metal argent, aurum, platinum or palladium and semiconductor on a substrate by a magnetron sputtering method; the film is provided with a nanometer microstructure formed by metal nanometer particles or clusters irregularly distributed on the semiconductor silicon substrate or the surface of the substrate; the components of the nanometer metal particles is argent, aurum, platinum or palladium; the dimension of the metal particles or clusters is 5 nm to 100 nm. The structure of the invention can make full use of plasma reinforcement effect on local surface produced by the metal particles and the optical nonlinear effect of the semiconductor silicon, read an information point less than an optical diffraction limit and achieve the effect of super resolution. In addition, the super resolution film for optical storage also has the advantages of simple preparation method, rapid response time, good read-out stability, strong signals, etc.

The invention discloses a triaxial fluxgate sensor, which comprises an x-y biaxial planar fluxgate sensor and a z-axis uniaxial planar fluxgate sensor, wherein an x-y biaxial chip comprises two independent uniaxial planar fluxgate sensor units which are in orthogonal distribution and arranged on a same silicon substrate, and the z-axis uniaxial planar fluxgate sensor comprises a substrate only which is made of large-thickness glass. By utilizing a silicon-glass bonding technology, the side surface of a short axial end of a z-axis uniaxial chip is bonded and fixed on the surface of the silicon substrate of the x-y biaxial chip, so that a magnetic sensitive axis of the z-axis uniaxial chip is perpendicularly orthogonal to x and y axial magnetic sensitive axes of the x-y biaxial chip, thereby realizing x, y and z orthogonality three-component detection of a magnetic field. The triaxial fluxgate sensor solves the problem of large size, heavy weight and high power consumption of an existing triaxial fluxgate sensor, and fully utilizes the advantages of small size, low power consumption, high consistency and small bonding alignment orthogonal error of a uniaxial fluxgate sensor chip of the micro-electro-mechanical system.

The invention discloses a preparation method and application of an apoferritin-based encapsulated Ru (bpy) 3<2+> immunosensor, and belongs to the field of nano materials and the field of biosensing. On the basis of the structural characteristics of uniform morphology, hydrothermal resistance and controllable assembly of apoferritin and the excellent electrochemiluminescence property of Ru (bpy) 3<2+>, a thermal induction method is provided for the first time to realize efficient and rapid packaging of a large amount of Ru (bpy) 3<2+> molecules in apoferritin and thus the compound Ru (bpy) 3<2+> apoferritin with excellent biocompatibility and high luminous efficiency is successfully prepared. The method is simple and efficient, the harsh pH value requirement and complex material synthesis steps of a traditional packaging method can be avoided, and the innovativeness is obvious. Antibody molecules are modified on the surface of Ru (bpy) 3<2+> @apoferritin; a label-free electrochemiluminescence immunosensor for detection of non-small cell lung cancer disease marker CYFRA 21-1 is researched and developed; the detection limit is as low as 31 pg/mL, the linear range is 100 pg/mL-50 ng/mL, and the immunosensor has an obvious potential application value in similar detection methods.

The invention discloses a torque metering device comprising a mounting chamber, a piston which is horizontally slidingly arranged inside the mounting chamber, and a sealed grease oil chamber which is formed by enclosure of the end of a first end of the piston and the mounting chamber. The grease oil chamber communicates with a pipeline which feeds grease oil to the grease oil chamber. The pipeline is provided with a pressure measurement member for measuring the pressure inside the grease oil chamber. The end surface of the first end of the piston is provided with a leakage hole which is used for communicating external oil lines to lead grease oil inside the grease oil chamber flowing to the outside. The device also comprises an intermediate gear which is rotationally arranged and produces axial force in the axial direction during operation, wherein the intermediate gear is arranged on the piston for pushing the connected piston travelling horizontally to squeezing the grease oil inside the grease oil chamber. The pressure measurement member measures the pressure inside the grease oil chamber to obtain the value of torque transmitted by the intermediate gear. By use of the torque metering device for measuring toque, the measuring accuracy is high, the signal response speed is fast, and the reliability is high; and the device has simple structure and is easy to maintain.

The invention discloses a small-molecule inhibitor for a bone formation negative regulatory factor Smurf1. The compound shown as a formula I can be used in preparation of medicines for promoting bone formation and preparation of a BMP sensitizing agent. The invention also provides one of the applications of the compound shown as the formula I: (1) preparation of products for improving osteogenic potential of cells, wherein the cells are specifically myogenic precursor cells or osteogenic precursor cells; (2) preparation of products for improving alkaline phosphatase, osteocalcin and / or type I collagen mRNA levels in cells, wherein the cells are specifically myogenic precursor cells or osteogenic precursor cells; (3) preparation of products for improving activity of alkaline phosphatase in myogenic precursor cells or osteogenic precursor cells or osteoblasts; (4) preparation of products for inhibiting degradation of an Smad1 / 5 protein under the condition of BMP pathway activation; and (5) preparation of products for reducing ubiquitination level of the Smad1 / 5 protein under the condition of BMP pathway activation.

The invention discloses a fluxgate sensor chip, and relates to the field of MEMS integration micro manufacturing. The fluxgate sensor chip comprises a high-sensitivity silicon substrate, an excitation coil, a detection coil, a magnetic core, electrodes and silicon oxide films, wherein both the excitation coil and the detection coil are micro electro-mechanical three-dimensional solenoid coils, bottom coils of the excitation coil and the detection coil are located in a silicon microgroove array at the surface of the high-sensitivity silicon substrate, the upper surfaces of the bottom coils are flush with the surface of the silicon substrate, and the bottom coils are insulated from the silicon substrate and the magnetic core through the silicon dioxide films; and the bottom coils, the magnetic core and top coils are insulated from each other through the silicon dioxide films. The fluxgate sensor chip adopts the silicon dioxide films to perform insulation coating, so that the mechanical strength of the integrated fluxgate sensor chip is improved. In addition, the fluxgate sensor chip is completely compatible with a microelectronic process, and compatible and synchronous integrated manufacturing of the integrated fluxgate sensor chip and a CMOS interface circuit can be realized.

The invention discloses a silicon carbide based integrated micro fluxgate sensor, which comprises a silicon carbide substrate, an excitation coil, a detection coil, a magnetic core, electrodes and silicon carbide films, and is characterized in that the rectangular magnetic core is located in a rectangular groove at the surface of the silicon carbide substrate, and the upper surface of the magnetic core is flush with the surface of the silicon carbide substrate; both the excitation coil and the detection coil are a micro electromechanical three-dimensional solenoid coil, bottom coils of the excitation coil and the detection coil are located in a microgroove array at the bottom of the rectangular groove, electrified wires of the bottom coils are insulated by the silicon carbide substrate at clearances of the microgroove array, and the bottom coils are insulated from the magnetic core through chemical vapor deposition silicon carbide films; top coils of the excitation coil and the detection coil are insulated from the magnetic core through the chemical vapor deposition silicon carbide films, and clearances of electrified wires of the top coils are filled and insulated by the chemical vapor deposition silicon carbide films; the surface of the sensor is covered by the chemical vapor deposition silicon carbide films and is isolated and protected from the air, and the electrodes are exposed via through holes.

Two molecular structures of a formula (A) and a formula (B) are used as construction units, a new fluorescent material is obtained through co-assembly of pi-pi interaction between molecules, and the fluorescent material can interact with volatile organic benzene series to generate an obvious fluorescence enhancement phenomenon. When used for detecting the organic benzene series, the fluorescent material obtained by co-assembling the compound represented by the formula (A) and the compound represented by the formula (B) has the advantages of being simple and convenient to operate, sensitive inresponse, quick in signal reaction, high in detection specificity, capable of being made into a small fluorescent device and convenient to carry.

The invention belongs to the technical field of gas trace detection, and particularly relates to a hydrogen detection method and system. The hydrogen detection method is based on a micro-nano opticalfiber. The micro-nano optical fiber comprises an input end and an output end. The method comprises the following steps: taking pump light and Stokes light as incident light sources; emitting pump light and Stokes light from the input end of a micro-nano optical fiber, evanescent fields generated by the pump light and the Stokes light coinciding with each other, the coincident evanescent fields interacting with hydrogen in a to-be-detected sample to generate a stimulated Raman scattering process taking rotational Raman transition of hydrogen molecules as a medium, and converting part of the pump light into the Stokes light; detecting a gain signal of the Stokes light output from the output end of the micro-nano optical fiber, and converting according to the relationship between the gain ofthe Stokes light and the hydrogen concentration to obtain the concentration of the hydrogen in the to-be-detected sample; wherein the frequency difference between the pump light and the Stokes light is equal to the rotational Raman transition frequency of hydrogen. The detection sensitivity is high and the signal response is fast.

The invention discloses a dynamic flow field measuring method, system and equipment. The dynamic flow field measuring equipment comprises a pressure measuring main body, wherein a head of the pressure measuring main body is provided with a probe head, a tail of the pressure measuring main body is provided with a socket, and the pressure measuring main body is internally provided with a pressure sensor respectively connected with the probe head and the socket. According to the dynamic flow field measuring equipment, the wind tunnel gust test direction field can be accurately measured in real time, the interface is standard, and the dynamic flow field measuring equipment is plug-and-play.

The invention discloses a composition for detecting colla corii asini content in a compound colla corii asini preparation, a kit and a detection method thereof. The composition is prepared from polypeptide I, polypeptide II, polypeptide III and a reference substance detection substrate, wherein an amino acid sequence of the polypeptide I is as shown in SEQ ID NO.1; an amino acid sequence of the polypeptide II is as shown in SEQ ID NO.2; amino acid sequence of the polypeptide III is as shown in SEQ ID NO.3; the reference substancedetection substrate is a fish skin glue. A detection value of the polypeptide I minus a detection value of the polypeptide II, and a detection value of the polypeptide III is utilized for correcting a detection error, so that the detection of the colla corii asini content in the compound colla corii asini preparation is realized. The method has the advantages of content detection accuracy and simplicity in operation, and has a wide application prospect in the quality monitoring field of the compound colla corii asini preparation.

The invention discloses a composition and a kit for detecting the content of donkey hide source component in donkey-hide gelatin, and a detection method thereof. The composition comprises polypeptide I, polypeptide II, polypeptide III and control detection matrix, wherein the amino acid sequence of the polypeptide I is shown as SEQ ID NO.1, the amino acid sequence of the polypeptide II is shown as SEQ ID NO.2, the amino acid sequence of the polypeptide III is shown as SEQ ID NO.3, and the control detection matrix is fishskin gelatin. The detection value of the polypeptide II is subtracted from the detection value of the polypeptide I, and the detection deviation can be corrected by utilizing the detection value of the polypeptide III, so that the detection of content of donkey hide source component in the donkey-hide gelatin can be realized. The method has the advantages of being accurate in content detection, and simple to operate, and has wide application prospects on the aspect of detecting the donkey hide source component in the donkey-hide gelatin.