30results about How to "Realize differentiated detection" patented technology

The invention discloses an electromagnetic ultrasonic longitudinal guided wave and magnetic leakage detection compounded nondestructive detection method. On the original basis of magnetic leakage, an electromagnetic ultrasonic (EMAT) exciting coil and an electromagnetic ultrasonic (EMAT) receiving coil are added. When the detection process is normal, only magnetic leakage detection is performed. When a defect is found by the magnetic leakage method, the electromagnetic ultrasonic (EMAT) exciting coil sends an ultrasonic longitudinal guided wave on the inner surface of a steel plate to be detected. Through analyzing the ultrasonic longitudinal guided signal received by the electromagnetic ultrasonic (EMAT) receiving coil, it can be determined whether a defect exists in the inner surface of the steel plate to be detected, thus determination of defects in the inner / outer surfaces of the steel plate to be detected is realized. The electromagnetic ultrasonic longitudinal guided wave and magnetic leakage detection compounded detection method effectively overcomes the shortages of low accurate rate of determination on defects and low detection speed in the prior art, and has the advantages of simple structure, little information processing amount and non-contact measurement.

The invention discloses a fluorescent probe capable of separately detecting cysteine / homocysteine, glutathione and sulfuretted hydrogen and a preparation method and application of the fluorescent probe. The molecular formula of the probe is C38H28IN5O5S, and the structural formula is shown in the description. The probe is simple to synthesize, higher in yield, can separately detect Cys / Hcy, GSH and H2S in a water solution, and can separately detect Cys / Hcy, GSH and H2S in the living cell level.

The invention provides a fluorescent probe for distinguishing detection of Cys / Hcy and GSH and a preparation method and application of the fluorescent probe. The English name of the fluorescent probeis 10-(diethylamino)-3-((7-nitrobenzo[c][1,2,5]oxadiazol-4-yl)oxy)-5,6-dihydrobenzo[c]xanthen-12-ium, and the fluorescent probe is called as NBD-O-1. The invention provides a method for detecting theCys / Hcy and GSH by the fluorescent probe NBD-O-1. In a PBS solution with the pH of 7.4 and v / v of 2 / 8 and containing 20% CH3CN, the qualitative distinguishing detection of the Cys / Hcy and GSH is achieved through an ultraviolet and fluorescent spectrometer without the interference of common amino acids. More importantly, the probe can be applied to the detection of the Cys / Hcy and GSH in animals and plants, the detection process is convenient, sensitive and rapid, and a detection result is accurate.

The invention discloses a novel closed type nucleic acid visual detecting method for coupling a nucleic acid amplification reaction, a nucleic acid intrusive reaction and a nano-particle chromogenic reaction. The detection method comprises the following steps: 1) target nucleic acid amplification and signal conversion phase: further amplifying the target nucleotide sequence, and converting the detection of the target nucleic acid to the detection of a hairpin probe fragment; 2) nanoprobe hybridization phase: after the amplification reaction, under the corresponding conditions, generating a gathering or dispersing phenomenon by the special nanoprobe, and utilizing the phenomenon to realize distinguishing detection to the target nucleic acid. With adoption of the detection method disclosed by the invention, the nucleic acid target sequence can be detected; furthermore, the nucleic acid intrusive reaction is high in specificity, and the nucleic acid sequence with single different basic groups near the intrusive loci can be distinguished and detected, so that the method not only can be used for detecting a template, but also can be used for single basic group distinguished SNP genotyping and gene mutation.

The invention provides a spiropyran-naphthalene diimide derivative and a synthesis method and applications thereof. The derivative is named as N-(2-(6-azido-1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl)ethyl)-3-(3',3'-dimethyl-6-nitrospiro[chromene-2,2'-indolin]-1'-yl)propanamide, NSP for short. The derivative can be converted into an isomer (NMR) under the irradiation of UV rays. According to a detection method, in a PBS-C2H5OH (1:1, v / v) buffer solution with a pH value of 7.4, contents of hydrogen sulfide and sulfur dioxide are quantitatively measured by a fluorescence spectrophotometer. The detection process is convenient, sensitive, and quick, and the detection result is accurate.

The invention provides a high-sensitivity hydraulic oil liquid detection device and a manufacturing method thereof. The high-sensitivity hydraulic oil liquid detection device is used for distinguishing and detecting grain pollutants including ferromagnetic metal grains, non-ferromagnetic metal grains, water drops, bubbles and the like in oil liquid. According to the manufacturing method of the device, two plane coils and two solenoid coils are combined and embedded into a microfluidic chip for the first time based on a microfluidic chip technology; the two plane coils are laminated and the solenoid coils are symmetrically arranged at two sides respectively; two silicon steel sheets are added into the two solenoid coils respectively, so that the detection sensitivity of the device is remarkably improved. According to the chip, one sensor unit is used for carrying out voltage detection, so that various grain pollutants in lubricating oil and hydraulic oil are distinguished and detected;a feasible method is provided for online monitoring of the oil liquid through machine equipment and fault diagnosis can be carried out on the machine equipment.

The invention provides a coumarin derivative DOCOPA as well as a preparation method and an application thereof. The English name of DOCOPA is (E)-4-(3-(7-(diethylamino)-2-oxo-2Hchromen-3-yl)-3-oxoprop-1-en-1-yl) phenylacrylate). The preparation method comprises the steps that 3-acetyl-7-diethylaminocoumarin and p-hydroxybenzaldehyde are dissolved in acetonitrile firstly, a catalytic amount of piperidine is added, and reflux is performed until a reaction is performed sufficiently; an intermediate compound is further obtained; the intermediate compound and triethylamine are dissolved in dichloromethane, acryloyl chloride is added dropwise gradually to an ice bath, room-temperature stirring is performed until a reaction is performed sufficiently, a product is subjected to column chromatography separation after reduced-pressure evaporation, and the DOCOPA is obtained. The DOCOPA is applied to distinguishing and detection of cysteine and homocysteine in a pH7.8 system and imaging of the cysteine and the homocysteine in cells. The DOCOPA shows high sensitivity and selectivity for the cysteine and the homocysteine.

The invention provides a multiparameter oil comprehensive detection device and a manufacturing method thereof in order to distinguish and detect ferromagnetic metal particles, nonferromagnetic metal particles, water drops and bubbles in oil. Based on a manufacturing method of a micro-fluidic chip, for the first time, a strip-shaped silicon steel sheet is arranged on the side of a planar inductancecoil to enhance the magnetic field around the planar inductance coil so as to improve the detection accuracy of the metal particles; and meanwhile, the strip-shaped silicon steel sheet and the planarinductance coil can be used as two polar plates of a capacitor so as to introduce capacitance parameter detection to distinguish and detect the water drops and the bubbles in the oil. The detection device can complete comprehensive detection of particle pollutants in lubricating oil and hydraulic oil, a new method for the rapid detection of oil in machinery equipment is provided, and the failurediagnosis of the machinery equipment can be realized.

The invention provides a fluorescent probe for distinguishing and detecting mercaptan and monitoring Cys / GSH metabolism as well as a preparation method and application of the fluorescent probe. The Chinese name of fluorescent probe is 10-(diethylamino)-3-((7-(diethylamino)-3-formyl-2-oxo-2H-chromen-4-yl) oxy)-5, 6-dihydrobenzo [c] xanthene-12-onium perchlorate, the English name is 10-(diethylamino)-3-((7-(diethylamino)-3-formyl-2-oxo-2H-chromen-4-yl)oxy)-5,6-dihydrobenzo[c]xanthen-12- ium perchlorate,, which is named as CM-O-AC. The invention provides a red fluorescent probe with multiple binding sites, good water solubility and large Stokes shift. The probe displays three different emission channels for distinguishing and detecting Cys / Hcy and GSH, and is successfully applied to HeLa celland living body imaging. In addition, the probe can realize recognition of the Cys / GSH metabolite SO2 at a cellular level, and realizes reversibility of a fluorescence signal under the action of H2O2. The probe can be used as a visual biological metabolism tool to be applied to physiological and pathological processes. The detection process is simple, sensitive and rapid, and the detection resultis accurate.

The invention provides an inductance type magnetic nanometer material sensor and a manufacturing method. The sensor comprises a microfluidics detection chip and a sensing unit. The microfluidics detection chip comprises a glass substrate and a chip body arranged on the glass substrate. The chip body comprises a micro-channel arranged on the chip body and provided with an oil inlet in one end and an oil outlet in the other end. The sensing unit comprises a spiral pipe coil and a magnetic nanoparticle layer. The interior of the spiral pipe coil is completely attached to the magnetic nanoparticlelayer. According to the technical scheme, the problems that in a traditional inductance type method in the prior art, the detection precision is insufficient, detection timeliness is low and operation is difficult are solved.

The invention discloses a fluorescent carbon quantum dot. The fluorescent carbon quantum dot is a nitrogen and phosphor-doped carbon quantum dot; a carbon source of the fluorescent carbon quantum dotis naphthalenedicarboxylic acid; the fluorescent carbon quantum dot has high yield rate of fluorescent quantum, can enter the microorganism to specially mark after the microorganism is deactivated, and the death and living of the microorganism can be effectively distinguished. The invention also discloses a preparation method of the fluorescent carbon quantum dot. The preparation method has the advantages that the raw materials are easy to obtain, and the preparation method is suitable for preparing the fluorescent carbon quantum dot with high yield rate of quantum. The invention discloses application of the fluorescent carbon quantum dot in activity detection of microorganisms and biomedical imaging; the fluorescent carbon quantum dot is used for effectively distinguishing the death and living of the microorganisms, so as to detect the activity of the microorganism at high efficiency; the cell toxicity of the fluorescent carbon quantum dot is low, and the fluorescent carbon quantum dot is suitable for in-vitro or in-vivo biomedical imaging detection.

The invention discloses a multi-active-site fluorescent probe as shown in a structural formula I in the specification. The fluorescence signal intensity of the probe on Cys is 80 times that on Hcy, 30times that on GSH and 260 times that on SO2. Cys can be highly selectively detected, and the interference of Hcy, GSH and SO2 can be distinguished at the same time. The detection limits on Hcy, GSH and SO2 are respectively 0.21 [mu]M, 0.35 [mu]M and 0.15 [mu]M, and the detection limit on Cys is as low as 13 nM. The probe is low in cytotoxicity, the fluorescence response change of the probe to Cys, Hcy, GSH and SO2 can be obviously observed through a cell imaging test, and the probe can be used for detecting in-vitro and in-vivo biological mercaptan and SO2.

The invention discloses an electromagnetic ultrasonic longitudinal guided wave and magnetic leakage detection compounded nondestructive detection method. On the original basis of magnetic leakage, an electromagnetic ultrasonic (EMAT) exciting coil and an electromagnetic ultrasonic (EMAT) receiving coil are added. When the detection process is normal, only magnetic leakage detection is performed. When a defect is found by the magnetic leakage method, the electromagnetic ultrasonic (EMAT) exciting coil sends an ultrasonic longitudinal guided wave on the inner surface of a steel plate to be detected. Through analyzing the ultrasonic longitudinal guided signal received by the electromagnetic ultrasonic (EMAT) receiving coil, it can be determined whether a defect exists in the inner surface of the steel plate to be detected, thus determination of defects in the inner / outer surfaces of the steel plate to be detected is realized. The electromagnetic ultrasonic longitudinal guided wave and magnetic leakage detection compounded detection method effectively overcomes the shortages of low accurate rate of determination on defects and low detection speed in the prior art, and has the advantages of simple structure, little information processing amount and non-contact measurement.

The invention discloses a novel closed type nucleic acid visual detecting method for coupling a nucleic acid amplification reaction, a nucleic acid intrusive reaction and a nano-particle chromogenic reaction. The detection method comprises the following steps: 1) target nucleic acid amplification and signal conversion phase: further amplifying the target nucleotide sequence, and converting the detection of the target nucleic acid to the detection of a hairpin probe fragment; 2) nanoprobe hybridization phase: after the amplification reaction, under the corresponding conditions, generating a gathering or dispersing phenomenon by the special nanoprobe, and utilizing the phenomenon to realize distinguishing detection to the target nucleic acid. With adoption of the detection method disclosed by the invention, the nucleic acid target sequence can be detected; furthermore, the nucleic acid intrusive reaction is high in specificity, and the nucleic acid sequence with single different basic groups near the intrusive loci can be distinguished and detected, so that the method not only can be used for detecting a template, but also can be used for single basic group distinguished SNP genotyping and gene mutation.

The invention discloses a method for differentiating multiple types of metal ions through single indicator. The method comprises the following steps of 1, mixing metal ion indicator with surfactant, or mixing the metal ion indicator with a NaOH aqueous solution, so that the single indicator is obtained; 2, mixing the single indicator with different metal ion aqueous solutions separately, collecting images obtained before and after mixing, and extracting color change data of the images obtained before and after mixing; 3, mixing the metal ion aqueous solution to be detected with the single indicator, collecting color change of the images before and after the metal ion aqueous solution to be detected is mixed with the single indicator, and comparing the color change with the color change data obtained in step 2, so that the categories of the metal ions in the metal ion aqueous solution to be detected are obtained. By means of the method for differentiating multiple types of metal ions through the single indicator, multiple types of metal ions in the aqueous solution can be rapidly detected.

The invention discloses a fluorescent probe with multiple active sites as shown in structural formula I. The fluorescent signal intensity of the probe for Cys is 80 times that of Hcy, 30 times that of GSH, and 30 times that of SO 2 260 times higher, can detect Cys with high selectivity, and distinguish Hcy, GSH and SO at the same time 2 Interference of Hcy, GSH and SO 2 The detection limits of Cys are 0.21μM, 0.35μM, 0.15μM, respectively, and the detection limit of Cys is as low as 13nM; the cytotoxicity of the probe is weak, through the cell imaging test, it can be clearly observed that the probe is effective for Cys, Hcy, GSH and SO 2 Fluorescent response changes for biothiols and SO in vitro and in vivo 2 detection.

The invention provides a fluorescent probe for distinguishing and detecting Cys / Hcy and GSH, its preparation method and application. The Chinese name of the fluorescent probe is 10‑(diethylamino)‑3‑((7‑nitrobenzo[c][1,2,5]oxadiazol‑4‑yl)oxy)‑ 5,6‑Dihydrobenzo[c]xanthene12ium, named NBD‑O‑1. The invention provides a method for the detection of Cys / Hcy and GSH by fluorescent probe NBD-O-1, which is prepared in PBS (pH 7.4, containing 20% ​​CH 3 CN, v / v) solution, the qualitative distinction of Cys / Hcy and GSH by ultraviolet and fluorescence spectrometers is not interfered by common amino acids. More importantly, the probe can be applied to the detection of Cys / Hcy and GSH in animals and plants, and the detection process is simple, sensitive and rapid, and the detection result is accurate.

The invention belongs to the field of molecular biology and relates to cascade intrusion signal amplification reaction combined nanogold-oligonucleotide probe visual detection. The cascade intrusion signal amplification reaction combined nanogold-oligonucleotide probe visual nucleic acid detection method provided by the invention comprises the following steps of: 1) first-step intrusion signal amplification reaction, during which accumulation of flap fragments is formed; 2) flap fragment circulation phase, during which complementary hybridization of the flap fragments and hairpin probes is performed to form a flap fragment-hairpin probe special structure, and the hairpin probes are cut after the structure is recognized by enzymes; and 3) nanogold-oligonucleotide probe detection phase, during which results of the cascade intrusion signal amplification reaction are visually detected by the utilization of two different oligonucleotide modified nanogold probes. By the utilization of the detection method provided by the invention, visual detection of a nucleic acid target sequence can be carried out. In addition, as the intrusion signal amplification reaction has high specificity, differentiated detection of the nucleic acid sequences with single-base differences near intrusion sites can be realized.

The invention discloses a fluorescent carbon quantum dot. The fluorescent carbon quantum dot is a carbon quantum dot co-doped with nitrogen and phosphorus, and the carbon source of the fluorescent carbon quantum is naphthalene dicarboxylic acid. Fluorescent carbon quantum dots have a high fluorescence quantum yield. After the microorganisms lose their activity, they can enter the microorganisms to specifically mark them, effectively distinguishing the life and death of microorganisms. The invention discloses a preparation method of the above-mentioned fluorescent carbon quantum dot, the raw material is easy to obtain, the preparation method is tested, and it is suitable for preparing the fluorescent carbon quantum dot with high quantum yield. The invention discloses the use of the above-mentioned fluorescent carbon quantum dots in microbial activity detection and biomedical imaging. The fluorescent carbon quantum dots can effectively distinguish the life and death of microorganisms, and realize efficient detection of microbial activity; meanwhile, the fluorescent carbon quantum dots have low cytotoxicity, It is suitable for biomedical imaging detection in vitro or in vivo.

The invention discloses a method for detecting nucleic acid signal amplification of ligation nucleic acid intrusive reaction and cutting endonuclease reaction, which belongs to the field of molecular biology. The method comprises the following steps: 1) during nucleic acid intrusive signal amplification, accumulating flap fragments; 2) during flap fragment connection, connecting the flap fragments with another oligonucleotide on a molecular beacon to form a cutting endonuclease site; 3) during cutting endonuclease signal amplification, only cutting a molecular beacon chain so that the fluorescent group of the molecular beacon is separated from a quenching group, and a new integrated molecular beacon is hybridized with a flap fragment connected with the molecular beacon, thus amplifying a target nucleic acid signal; and 4) inspecting the target nucleic acid signals. The method is capable of inspecting nucleic acid target sequences and respectively inspecting nucleic acid sequences with single base difference near intrusive sites.

The invention provides a coumarin derivative CTT and its synthesis method and application. The Chinese name of the derivative CTT is: ethyl (E)-2-cyano-3-(7-(diethylamino)-2-oxo-4-(p-tolylthio)-2H-color Alken-3-yl) ethyl acrylate; English name is ethyl-2-cyano-3-(7-(diethylamino)-2-oxo-4-(p-tolylthio)-2H-chromen-3-yl)acrylate. The derivative CTT was used as a fluorescent probe in DMSO:PBS=1:4(v / v) solution, and the differential detection of three biological thiols with different fluorescent signals was realized by a fluorescence spectrophotometer. This method realizes multicolor fluorescence imaging for the differential detection of thiols in vivo.

The invention discloses an aldehyde group-containing metal iridium complex and an application thereof in detection and distinction of homocysteine and cysteine; the metal iridium complex has the structural formula defined in the specification, wherein R is H, phenyl or C1-C12 alkyl. The aldehyde group in the obtained metal iridium complex can undergo a reaction with homocysteine to generate thiazan, and carboxyl (COOH) on the generated thiazan can form hydrogen bonds with amino (NH2) in the metal iridium complex, so that the complex can give out light to generate a great blue shift and makes light increased, but cysteine does not have the phenomenon; therefore, the metal iridium complex can be made into a fluorescence probe for detection and distinction of homocysteine and cysteine, and has important significance on biological analysis and detection.

The invention discloses an electromagnetic phase amplitude analysis method for detecting oil abrasive particles and a detection device thereof, which is used for distinguishing and detecting ferromagnetic and non-ferromagnetic particles of oil metal particles (2) in a hydraulic system pipeline (1), and a retrieval device (3) comprising an externally penetrating electromagnetic detection device (31), characterized in that the retrieval device (3) also includes a wear particle concentration detection device (32) for detecting the concentration of metal particles in the oil, wherein the electromagnetic detection device (31) The abrasive particle concentration detection device (32) is arranged on the periphery of the same position as the detection hydraulic system pipeline (1). Obtain the relationship curve between signal phase and ferromagnetic particle content (percentage) through simulation or experiment, and project the actual signal phase onto the curve to obtain the ferromagnetic particle content, so as to realize the analysis of ferromagnetic materials and non-ferromagnetic materials of oil abrasive particles Differential detection of the content of each component.

The invention discloses an aldehyde group-containing metal iridium complex and an application thereof in detection and distinction of homocysteine and cysteine; the metal iridium complex has the structural formula defined in the specification, wherein R is H, phenyl or C1-C12 alkyl. The aldehyde group in the obtained metal iridium complex can undergo a reaction with homocysteine to generate thiazan, and carboxyl (COOH) on the generated thiazan can form hydrogen bonds with amino (NH2) in the metal iridium complex, so that the complex can give out light to generate a great blue shift and makes light increased, but cysteine does not have the phenomenon; therefore, the metal iridium complex can be made into a fluorescence probe for detection and distinction of homocysteine and cysteine, and has important significance on biological analysis and detection.

The invention relates to an oil pollutant multi-parameter integrated detecting device and method based on the phase shifting technology. In the prior art, unknown oil pollutants cannot be distinguished or detected, only one or two known oil pollutants can be distinguished and detected, and the actual detection and application requirements cannot be met. The inductance detection and capacitance detection can be conducted on each known oil pollutant at the same time, an inductance output curve corresponding to inductance output signals and a capacitance output curve corresponding to capacitanceoutput signals of each pollutant are obtained, and the known oil pollutants can be distinguished, detected and counted by comprehensively analyzing the inductance output curves and the capacitance output curves of the pollutants. An inductance detection object and a capacitance detection object are the same, and the inductance detection and capacitance detection can be conducted at the same time without time difference. The oil pollutant detection cost is reduced, the detecting device is simple, the detecting result is reliable, and the actual detection and application requirements are met.

The invention provides a spiropyran-naphthalimide derivative and its synthesis method and application, the Chinese name of the derivative is N-(2-(6-azido-1,3-dioxo ‑1H‑benzo[de]isoquinoline‑2(3H)‑yl)ethyl)‑3‑(3',3'‑dimethyl‑6‑nitrospiro[chromene‑2,2'‑ Dihydroindoline]‑1'‑yl) propionamide, the English name is N‑(2‑(6‑azido‑1,3‑dioxo‑1H‑benzo[de]isoquinolin‑2(3H)‑yl)ethyl) ‑3‑(3',3'‑dimethyl‑6‑nitrospiro[chromene‑2,2'‑indolin]‑1'‑yl)propanamide, named NSP, which can be converted to its isomer by UV irradiation Bulk NMR. Assay method is in PBS‑C pH 7.4 2 h 5 In the buffer solution of OH (1:1, v / v), the contents of hydrogen sulfide and sulfur dioxide were quantitatively detected by fluorescence spectrophotometer, respectively. The detection process is simple, sensitive and fast, and the detection result is accurate.

The invention provides a high-sensitivity hydraulic oil liquid detection device and a manufacturing method thereof. The high-sensitivity hydraulic oil liquid detection device is used for distinguishing and detecting grain pollutants including ferromagnetic metal grains, non-ferromagnetic metal grains, water drops, bubbles and the like in oil liquid. According to the manufacturing method of the device, two plane coils and two solenoid coils are combined and embedded into a microfluidic chip for the first time based on a microfluidic chip technology; the two plane coils are laminated and the solenoid coils are symmetrically arranged at two sides respectively; two silicon steel sheets are added into the two solenoid coils respectively, so that the detection sensitivity of the device is remarkably improved. According to the chip, one sensor unit is used for carrying out voltage detection, so that various grain pollutants in lubricating oil and hydraulic oil are distinguished and detected;a feasible method is provided for online monitoring of the oil liquid through machine equipment and fault diagnosis can be carried out on the machine equipment.

The invention discloses a fluorescent probe capable of separately detecting cysteine / homocysteine, glutathione and sulfuretted hydrogen and a preparation method and application of the fluorescent probe. The molecular formula of the probe is C38H28IN5O5S, and the structural formula is shown in the description. The probe is simple to synthesize, higher in yield, can separately detect Cys / Hcy, GSH and H2S in a water solution, and can separately detect Cys / Hcy, GSH and H2S in the living cell level.