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Health monitoring method for cable system in cable structure
InactiveCN101319962AMonitor and evaluate health statusReduce distortionMachine part testingTension measurementEngineeringLinearity
The invention relates to a health monitoring method used for a cable system in a cable structure which carries out a plurality of mechanical calculations based on the mechanical calculation benchmark model of a structure; the calculation times are equal to the quantities of the cables. In each calculation, one cable is supposed to have unit damage; the result for each calculation forms vector for calculating a current cable force; a cable force change vector is obtained by using the vector for calculating the current cable force to subtract an initial cable force vector; all the cable force change vectors form a cable force change identity matrix. The noninferior solution of the current damage vector of the cable can be fast calculated by utilizing proper arithmetic such as multi-target optimizing arithmetic according to the approximating linear relation of the current cable force vector (formed by all the current cable forces that are actually detected), the cable force change identity matrix, a unit damage scalar and the current cable damage vector (formed by all the current damage quantities), thus being capable of more accurately confirming the position and the damage degree of the damaged cable.
Owner:SOUTHEAST UNIV
Method for simultaneously determining one hundred pesticide residuals in traditional Chinese medicine through ultrahigh performance liquid chromatography-tandem quadrupole mass spectrum
ActiveCN102735784AReduce usageReduce pollutionComponent separationHigh concentrationRelative standard deviation
The invention provides a method for simultaneously determining one hundred pesticide residuals in a traditional Chinese medicine through ultrahigh performance liquid chromatography-tandem quadrupole mass spectrum. The method comprises the following steps: immersing traditional Chinese medicine powder with ultrapure water, extracting with acetonitrile containing 0.1% acetic acid through a homogenate method, carrying out solid phase dispersing purification with N-propylethylenediamine and graphitized carbon, detecting in a timesharing multi-reaction monitoring mode through the ultrahigh performance liquid chromatography-tandem quadrupole mass spectrum, and quantifying with an external standard curve method. 88% of pesticides have good linear relations in a range of 5-500ng / mL, correlation coefficients are above 0.99, and the correlation coefficients of above 98% of the pesticides are above 0.97; the average recovery rate of the pesticides with the low concentration of 10mug / kg, the middle concentration of 50mug / kg and the high concentration of 100mug / kg is 70-130%, and the relative standard deviation is less than 0.15; and the detection limit is equal to or less than 0.01mg / kg, so routine detection requirements can be completely satisfied. The method has the advantages of strong versatility, good selectivity, high sensitivity, and rapidness and simplicity.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Off-resonance photoacoustic spectrometric detection and analysis device
InactiveCN102661918AOptical signal enhancementImprove performanceMaterial analysis by optical meansGas concentrationNon coherent
An off-resonance photoacoustic spectrometric detection and analysis device consists of a photoacoustic spectrometric module (8). The photoacoustic spectrometric module (8) comprises a light source module (2-1), a photoacoustic signal generation module (2-2), an optical power measurement module (2-3) and a fault diagnostic analysis module (2-4). Optical signals generated by an infrared incoherence light source in the light source module (2-1) are focused by an ellipsoidal reflector to form a focused light beam, the focused light beam is modulated into light of specific frequency and wavelength by chopping blades of an optical chopper and optical filters and then transmitted to the photoacoustic signal generation module (2-2), and the fault diagnostic analysis module (2-4) calculates each gas concentration according to to-be-tested gas photoacoustic signals generated by irradiation, diagnoses faults and alarms. The off-resonance photoacoustic spectrometric detection and analysis device can be used for quantitative detection of gases such as SF6, CF4, SO2F2, SOF2, SO2, SF4 and H2O and is applicable to onsite online monitoring.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Quality standard of Moluo Dan.and detecting method thereof
ActiveCN101109733AGood linear relationshipImprove accuracyMaterial analysis by observing effect on chemical indicatorComponent separationOphiopogon japonicusThin layer
The invention discloses a method for controlling the quality of Moluo Dan, which comprises the discrimination method for thin layer of Ophiopogon japonicus, pseudo-ginseng, Sanguisorba officinalis, angelica sinensis, Ligusticum wallichii and corydalis tuber, as well as the content determining of paeoniflorin (C23H28O11) in white Chinese herbaceous peony. The white Chinese herbaceous peony contained in each 1g of Moluo Dan is expressed by C23H28O11, which shall not be less than 0.8 mg.
Owner:HANDAN PHARMA
Cable system health monitoring method based on strain monitoring cable structure
InactiveCN101334275AMonitor and evaluate health statusReduce distortionStructural/machines measurementComplex mathematical operationsReference modelMulti objective optimization algorithm
The invention discloses a health monitoring system of a cable system in a cable structure on the basis of strain monitoring; a plurality of times of mechanical calculation is carried out on the basis of the reference model of the mechanical calculation of a structure, the times of the calculation is equal to the number of cables. Supposing that only one cable has unit damage during each calculation, the calculation result of each time constitutes a current strain calculation vector; a strain change vector is obtained by that each current strain calculation vector minus an initial strain vector; all the strain change vectors constitute a unit damage strain change matrix. According to the similar linear relation between the current strain vector (constituted by the current measured strain of all the given points) and the initial strain vector, the unit damage strain change matrix, an unit damage scalar and a current cable damage vector (constituted by current damage amount of all cables), the noninferior solution of the current cable damage vector can be figured out fast by utilizing the suitable algorithms of multi-objective optimization algorithm, etc., therefore, the position and the degree of damage of the damaged cable can be determined accurately.
Owner:SOUTHEAST UNIV
High-temperature-resistant copolymer oil well cement retarder and preparation method thereof
ActiveCN104403056AImprove performanceSolve the problem of severe subsidence at high temperatureDrilling compositionPolymer scienceFumaric acid
The invention relates to a high-temperature-resistant copolymer oil well cement retarder and a preparation method thereof. The preparation method comprises: respectively weighing four polymerization monomers such as 2-acrylamide-2-methylpropanesulfonic acid, diallyldimethylammonium chloride, maleic anhydride or itaconic acid or fumaric acid, and acrylic acid or methacrylic acid according to the mass ratio of 45-80:5-17:7-18:8-20, dissolving the first three monomers in water, then adding sodium polyphosphate and diphenylcarbazide, then successively adding a chain transfer reagent and an initiator, and finally dropwise adding the forth monomer, performing heating reaction and adjusting the pH value, so as to obtain the copolymer retarder. The invention also provides the high-temperature-resistant copolymer oil well cement retarder prepared by the above preparation method. The retarder is resistant to a high temperature up to 230 DEG C and is weak in dispersibility at a high temperature, the cement paste strength develops fast at a low temperature, the addition amount of the retarder has good linear relation with the cement paste hardening time, and the cement paste comprehensive performance is good.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Visible and reversible ratiometric fluorescent probe as well as preparation method and application thereof
InactiveCN105038766ARealize qualitative and quantitative detectionGood linear relationshipOrganic chemistryFluorescence/phosphorescenceFluorescenceHand held
The invention discloses a visible and reversible fluorescent probe which comprises a cyanine fluorescent group and a benzothiazole group, and the general formula of the probe is shown in the description. The preparation method of the reversible fluorescent probe comprises the following steps: (1) dropwise adding phosphorus oxychloride into salicylaldehyde and paraformaldehyde for reaction, so as to obtain a product 1; (2) enabling the product 1 and hexamethylene-tetramine to react, so as to obtain a product 2; (3) enabling the product 2 and 2-aminobenzenethiol to react at the room temperature, so as to obtain a product 3; (4) enabling the product 3 and a compound 4 to react, so as to obtain the visible and reversible fluorescent probe. According to the ratiometric fluorescent probe provided by the invention, obvious color variation can be found out under natural light or an ultra-violet lamp, and the qualitative detection of sulfur dioxide gas can be implemented under natural light or a hand-held ultra-violet lamp, so that the operation is simple, high convenience and quickness are achieved, and the effect is remarkable; the fluorescent probe can effectively prevent interference from other impurities in samples, and is excellent in selectivity; in addition, the cumbersome pre-processing process of samples is avoided, so that the detection efficiency is high.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Fluorescent probe compounds, preparation method and use thereof
InactiveCN101735277AHigh detection sensitivityGood choiceGroup 5/15 element organic compoundsAnalysis by subjecting material to chemical reactionLinear relationshipLinearity
Owner:DALIAN CHROMAS BIOSCI
Stress sensor with self-repairing ability and preparation method thereof
InactiveCN109974905AWide range of workHigh sensitivityMaterial nanotechnologyNanosensorsScreen printingElectrical resistance and conductance
The invention discloses a stress sensor with a self-repairing ability and a preparation method thereof. according to the preparation method, a one-dimensional metal nanowire, a two-dimensional inorganic nanosheet, hydrogel functional polymers, an additive and the like are compounded to prepare a nanocomposite colloidal printing ink with rheological characteristics, and the colloidal printing ink is printed on a wearable substrate through screen printing to prepare the repairable stress sensor having a shell-like bionic structure, wherein the one-dimensional metal nanowire provides a conductivenetwork structure for reducing resistance of the sensor; the two-dimensional inorganic nanosheet forms a layered strcture for improving sensitivity of the sensor; and a reversible dynamic cross-linking point is formed among the repairable hydrogel functional polymers, the two-dimensional inorganic nanosheet and the additive, so that the device has repairable performance. The prepared stress sensor has the advantages of large operating strain range, high sensitivity, repairable property after overload damage and the like, and has great application prospects in the fields of artificial electronic skin and biomimetic robots.
Owner:NANKAI UNIV
Dual-rare-earth-metal organic frame material used in temperature detection and preparation method of dual-rare-earth-metal organic frame material
InactiveCN103319509AHigh degree of crystallinityLarge crystal sizeThermometers using physical/chemical changesGroup 3/13 element organic compoundsRare earthCarboxylic acid
The invention relates to a dual-rare-earth-metal organic frame material used in temperature detection and a preparation method of the dual-rare-earth-metal organic frame material. The dual-rare-earth-metal organic frame material has a structure general formula (Tb1-xEux)Ln, wherein L is an organic ligand containing a pyridine carboxylic acid group, x is more than 0 or not more than 0.5, and n is equal to 1-4. The dual-rare-earth-metal organic frame material is prepared through a hydrothermal or solvothermal reaction. The dual-rare-earth-metal organic frame material is simple in preparation process, high in yield and good in stability. The dual-rare-earth-metal organic frame material simultaneously has characteristic light-emitting peaks of rare earths of europium and terbium, is capable of realizing self-calibrating temperature detection because a good linear relation exists between a strength ratio of the two peaks and the temperature, and is high in sensitivity reaching 3.53.K<-1>; the dual-rare-earth-metal organic frame material to be expected as a novel temperature sensing material is practically applied to the field of low-temperature detection because the light-emitting color within a temperature range of 14-300K changes with the change of the temperature.
Owner:ZHEJIANG UNIV
High performance liquid chromatography detection method for residual quantity of multiple ultraviolet absorbents in cosmetics
InactiveCN103063763AAchieving Simultaneous DetectionReduce dissolutionComponent separationHplc mass spectrometryQuantitative assay
The invention relates to the field of analytical chemistry and food safety, and provides a high performance liquid chromatography detection method for residual quantity of multiple ultraviolet absorbents in cosmetics. A cosmetic sample of 0.4g is weighed and placed in a plastic centrifuge tube of 50 ml, sample extraction liquid of 20ml is added, after the cosmetic sample of 0.4g and the sample extraction liquid of 20ml are mixed for 2 minutes in a vortex mode, sonic oscillation extraction is carried out for 20 minutes, 8000 revolutions per minute centrifugation is carried out for 10 minutes and, and supernate is to be purified; and after test solutions sequentially pass through microfiltration membranes of 0.45 micrometer and 0.20 micrometer, a high performance liquid chromatograph is adopted to carry out qualitative determination and quantitative assay. The detection method has the advantages of being simple, fast, accurate, efficient, and the like, and can detect 12 ultraviolet absorbents at the same time. Technical indexes of detection minimum, the recovery rate, the degree of precision, and the like all meet relevant demands for ultraviolet absorbent detection in sun block cosmetics at home and abroad. The method is suitable for detection and monitoring of the ultraviolet absorbents in the sun block cosmetics, and has great significance on promoting of import and export trade of cosmetics of our country, ensuring of safety of the cosmetics, and guarantee of human body health.
Owner:林维宣
Preparation method and application of GR/WS2-AuNPs-WS2 compound molecular imprinting sensor
ActiveCN104833767AHigh electrochemical catalytic activityLarge specific surface areaChemical analysis using catalysisMaterial electrochemical variablesFunctional monomerPhenylalanine
The invention discloses a preparation method of a GR / WS2-AuNPs-WS2 compound molecular imprinting sensor. The preparation method includes the steps: 1) preparing tungsten sulfide which is nanosheet transition metal; 2) preparing an AuNPs / WS2 compound; 3) preparing a GR / WS2-AuNPs-WS2 compound; 3) preparing a GR / WS2-AuNPs-WS2 compound modified electrode; 4) taking the GR / WS2-AuNPs-WS2 compound as a substrate of the modified electrode, L-phenylalanine as a template molecule, 2-ethyl-4-methylimidazole as a crosslinking agent and methacrylic acid as a functional monomer to prepare an L-phenylalanine molecular imprinting sensor. The invention further provides an application of the molecular imprinting sensor in detection and separation of L-phenylalanine. L-phenylalanine detection sensitivity of the sensor is greatly improved owing to the GR / WS2-AuNPs-WS2 compound, and the prepared L-phenylalanine molecular imprinting sensor is high in L-phenylalanine sensitivity and selectivity by taking advantages of molecular imprinting.
Owner:QINGDAO UNIV
Determination method of volatile organic acids in cigarette mainstream smoke
ActiveCN104316634AGood linear relationshipImprove accuracyComponent separationOrganic acidGas chromatography–mass spectrometry
The invention provides a determination method of volatile organic acids in cigarette mainstream smoke. According to the determination method, the content of the volatile organic acids in total particulate matters of the cigarette mainstream smoke is determined by adopting vibration extraction and a gas chromatography-mass spectrometry technology. The determination method particularly comprises the following steps: (1) preparing a standard solution; (2) pretreating a sample; (3) qualitatively detecting the sample; (4) quantitatively detecting the sample; and (5) determining the content of the actual sample. According to the determination method of the volatile organic acids in the cigarette mainstream smoke, a standard sample addition method is used for qualifying and an internal sample standard curve method is used for quantifying; the recycling rate of the method is 97.5%-110.3%; the relative standard deviation (RSD%) of the method is 1.2%-8.5%; and the determination method has good sensitivity, accuracy and precision. Meanwhile, the method adopts the vibration extraction and a sample can be directly fed without deriving; and the determination method is simple and convenient to operate, and rapid in analyzing speed and is suitable for the determination of a large batch of the samples.
Owner:CHINA TOBACCO GUIZHOU IND
Cable system health monitoring method in cable structure based on mixed monitor
ActiveCN101387600AMonitor and evaluate health statusReduce distortionStructural/machines measurementUsing mechanical meansReference modelLinear relationship
The invention relates to a health monitoring method for the cable system of cable structure, based on hybrid monitor, comprising that: based on the mechanical calculation reference model of the structure, the method processes a plurality of mechanical calculations while the calculation number equals to the cable number, wherein each calculation assumes that only one cable has units damaged and each calculation attains a calculation present digit vector of the monitored value (the following texts omits the description of the monitored value); each calculation present digit value is subtracted with an initial digit vector to obtain a digit variable vector; all digit variable vectors form an unit damage monitored value digit variable matrix. By calculating the similar linear relationship among the present digit vector with the initial digit vector, the unit damage monitored value variable matrix, the unit damage scalar and the present cable damage vector (formed by all cable present damage quantity), the non-inferior solution of the present cable damage vector can be calculated by a suitable algorism as multi-object optimization algorism and the like, thereby accurately finding the position of a damaged cable and the damage degrees thereof.
Owner:JIANGSU XINTUO CONSTR GRP +1
Elastomer thin film, preparation method thereof and flexible pressure sensor comprising elastomer thin film
ActiveCN109883583AGood linear relationshipRealize industrial preparationForce measurement using piezo-electric devicesElastomerSelective laser sintering
The invention relates to an elastomer thin film, a preparation method thereof and a flexible pressure sensor comprising the elastomer thin film, belongs to the technical field of pressure sensors, andaims at solving the technical problem that large-scale industrial production is difficult to realize as the flexible pressure sensors are narrow in linear response range and the flexible pressure sensor preparation methods are bad in repeatability in the prior art. According to the preparation method of the elastomer thin film, a three-dimensional model of a casting mould with a groove structureis established through three-dimensional modeling software; the casting mould in the step I is machined by adoption of a selective laser sintering technology; and finally, an elastomer fluid is pouredinto the groove of the casting mould obtained in the step II, and after curing is carried out, a thin film is stripped from the mould so as to obtain the elastomer thin film with a surface microstructure. The contact area and pressure intensity of the elastomer thin film present a favorable linear relationship in a range as high as 200 kPa, so that the wide linear response range and high sensitivity of the flexible pressure sensor can be realized.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
EML4-ALK (Echinoderm microtubule associated protein like4-anaplastic lymphoma kinase) fusion gene fluorescent quantitative PCR (polymerase chain reaction) assay kit
ActiveCN103468813AEliminate distractionsHigh detection sensitivityMicrobiological testing/measurementEchinodermConserved sequence
The invention relates to an EML4-ALK (echinoderm microtubule associated protein like4-anaplastic lymphoma kinase) fusion gene fluorescent quantitative PCR (polymerase chain reaction) assay kit, which is applicable to assay of EML4-ALK fusion gene mutation in lung adenocarcinoma. The kit comprises probes, primers and positive controls, which are specially designed for conserved sequences of 9 fusion variations of the EML4-ALK fusion gene. The kit can be used for quickly and accurately assaying 9 most common EML4-ALK fusion gene variations with high sensitivity, namely 9 fusion variations of 7 variant subtypes, which are subtype 1 (E13; A20), subtype 2 (E20; A20), subtype 3 (E6a / b; A20), subtype 4 (E14; A20), subtype 5 (E2a / b; A20), subtype 6 (E18; A20) and subtype 7 (E14; A20), so that a real-time fluorescent quantitative PCR system for assaying 9 most common EML4-ALK fusion gene variations can be established.
Owner:广州达健生物科技有限公司
Method for identifying and evaluating toxigenic capability of toxigenic strain of aflatoxin
ActiveCN109557314ARapid virulenceRapid Identification EvaluationMicrobiological testing/measurementBiological material analysisAflatoxin contaminationPcr method
The invention, which belongs to the biological field, particularly relates to a method for identifying and evaluating the toxigenic capability of a toxigenic strain of aflatoxin. A ratio of the aflatoxin yield to the Nor-1 gene transcription amount is determined and the high relative stability is realized. An aflatoxin strain toxigenic capability identification model is established and thus a regression equation between the aspergillus flavus toxigenic capability and the AFT / Nor-1 ratio is obtained. With determination of the AFT / Nor-1 ratio, the toxigenic capability of the aspergillus flavus strain is identified and evaluated rapidly and accurately, so that the method has the important significance in aflatoxin pollution early warning and prevention controlling. Besides, a synchronous detection RT-PCR method for the aflatoxin yield and the nor-1 gene transcription amount is also established; and the AFT / Nor-1 ratio obtained based on the synchronous detection RT-PCR method is reliable and accurate and can be used as the identification index for determining the toxigenic capability of the aspergillus flavus strain.
Owner:INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
Electrochemical paracetamol molecular imprinting transducer and manufacturing method thereof
InactiveCN102735729AElectrochemically activeGood linear relationshipMaterial electrochemical variablesCross-linkFunctional monomer
The invention discloses an electrochemical paracetamol molecular imprinting transducer and a manufacturing method thereof. According to the transducer, a molecular imprinting technology and an electric analysis and chemical detection technology are combined. Paracetamol is taked as a template molecule, acrylamide is taken as a functional monomer, special resource rosin of Guangx is combined with paracetamol and acrylamide, and maleated rosin ethylene glycol dimethacrylate compounded by the rosin serving as a raw material is used as a cross-linking agent. The electrochemical paracetamol molecular imprinting transducer can be used for measuring the content of paracetamol, and has favorable selecting recognition performance. The electrochemical analysis method for detecting the paracetamol, which is provided by the invention, is simple and practical, and meanwhile, can be used for overcoming the defect of the complexity of the traditional method.
Owner:GUANGXI UNIV FOR NATITIES
Femtosecond laser pulse produced microsize optical fiber Fabry-perot sensor and its production method
ActiveCN101055197AWith miniaturizationIntegratedOptical light guidesConverting sensor output opticallyNegative temperatureFemto second laser
The invention provides a minitype optical fiber FP sensor produced by fetosecond laser pulse, which is to produce a small cavity with rectangle cross section, and full penetration through fiber core on an ordinary single-mode optical fiber, and the depth of the small cavity satisfies: (D+d) / 2<=h<=D, wherein D is the diameter of the fiber, d is fiber core diameter. The invention also provides the production method of the invention. The sensor is superior in not only the special physical characteristic of miniaturization, integration, Convenience for production and reuse, strong harsh environment resistance capability, but also having negative temperature sensitivity and improving the sensitivity of axial load in a certain extent, and being applied in the optical sensing field in the future.
Owner:SICHUAN GUANGSHENG IOT TECH CO LTD
Surface modified graphene polymer-based piezoresistive composite material and preparation method thereof
The invention discloses a surface modified graphene polymer-based piezoresistive composite material and a preparation method thereof. According to the polymer-based piezoresistive composite material, room-temperature vulcanized silicon rubber is used as a matrix, and surface modified graphene grafted and modified by octadecylamine is used as a conductive filler; in the reaction of grafting the octadecylamine to graphene, the mass ratio of the octadecylamine to graphene oxide is 1:1; and the graphene volume fractions of the surface modified graphene / silicon rubber composite material are respectively 0.96 percent, 1.19 percent and 1.43 percent. The surface modified graphene / silicon rubber piezoresistive composite material prepared by a solution blending method has the advantages of graphene dispersion uniformity, low percolation threshold value, high piezoresistive sensitivity, high piezoresistive repeatability, low preparation cost and the like.
Owner:UNIV OF SCI & TECH BEIJING
Preparation method of graphite oxide phase carbon nitride modified electrode and application of electrode in detection of heavy metal ions
ActiveCN104634836AGood dispersionGood compatibilityMaterial electrochemical variablesCarboxyl radicalCarbon nitride
The invention relates to a preparation method of a graphite oxide phase carbon nitride modified electrode. The preparation method comprises the following steps: (1) preparing graphite oxide phase carbon nitride; and (2) preparing a graphite oxide phase carbon nitride sensor. The electrode is applied to detecting heavy metal ions. Graphite oxide phase carbon is of a three-dimensional hole structure which is large in specific surface area and contains hydrophilic groups such as hydroxyl, carboxyl, and epoxy groups. The graphite oxide phase carbon is applied to an electrochemical sensor. The heavy metal ions Cu<2+> are detected by virtue of a different pulse stripping voltammetry, and influence of factors such as enriching time, enriching potential, the pH value of a solution, and modification amount on stripping peak current can be optimized. Under an experimental condition that the enriching time is 300s, the enriching potential is -0.6V, the pH value of the solution is 4.68 and the modification amount is 12 microliters, a standard curve represents a good linear relationship, wherein the linear range is (1.60*10<-15>-6.31*10<-15>mol / L, the linear equation is ip(microA)=1.2533C(micro mol / L)+6.2232, the correlation coefficient (R) is 0.9989, and the limit of detection (S / N=3) reaches 1*10<-16>mol / l. The electrode has ultrahigh sensitivity to heavy metal ion detection.
Owner:YANGZHOU UNIV
Two-dimensional layered organic-inorganic composite perovskite material optical detector and manufacturing method thereof
InactiveCN106058055AGood linear relationshipChange physical propertiesFinal product manufactureSolid-state devicesSpinsPhotocurrent
The invention relates to a two-dimensional layered organic-inorganic composite perovskite material optical detector and a manufacturing method thereof. The optical detector comprises glass which acts as a substrate, two-dimensional layered organic-inorganic composite perovskite series material which is spin-coated on the substrate and acts as a photosensitive layer, and a gold thin-film which is vapor-plated on the photosensitive layer and acts as a source electrode and a drain electrode. Compared with the optical detectors in the prior, detection of incident light of the specific wavelength range can be realized, and intensity of incident light can be rapidly obtained through the size of photocurrent.
Owner:TONGJI UNIV
Phosphatide compound of resveratrol compounds and method for preparing the same and the application thereof
InactiveCN101095664AImprove solubilityHigh dissolution rateAntibacterial agentsHydroxy compound active ingredientsSolubilitySuppository
The invention relates to resveratrol phosphatide compound, the preparation method and its applciaiton. The resveratrol mainly comprises stilbenes parent nucleus, and is slightly soluble or insoluble in water, and is not stable. So the biological utilization rate is low and medical effect is reduced and the parenteral administration is limited. The key is to increase its solubility, so the resveratrol phosphatide compound is needed by market. The resveratrol phosphatide compound comprises resveratrol and phosphatide, with the weight proportion being 1: 0.5-50.The product can be used to prepare tablet, capsule, granule, suppository, injection, or freeze dried or compound tablet.
Owner:HEILONGJIANG UNIV
H5, H7, H9 subtype auian flu virus real-time fluo rescent quantixative PCR detecting method
InactiveCN1814805AStrong specificityGood linear relationshipMicrobiological testing/measurementFluorescenceBio engineering
This invention relates to a real time fluorescence quantitative PCR test method for H5, H7 and H9 sub-avian flu viruses including the following steps: set-up of standard molecules, the design of specific virus quantitative PCR primer and the probes, pick-up of virus sample RNA, the inverse transcription polyenzyme chain reaction to the pic-up sample RNA to get a sample cDNA, the optimization and set-up of the PCR quantitative test method for M genes.
Owner:SHANGHAI JIAO TONG UNIV
Preparation method for fluorescent carbon quantum dot/SiO2/inorganic fluorescent powder ternary composite temperature sensing material
ActiveCN104830325ASimple manufacturing methodImprove anti-interference abilityThermometers using physical/chemical changesLuminescent compositionsSilanesLinear relationship
The invention discloses a preparation method for a fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite temperature sensing material, and belongs to the field of composite functional material. According to the preparation method, anhydrous citric acid and organosilane are used as raw materials for synthesis of silane functionalized fluorescent carbon quantum dots, a sol-gel method is adopted, a hydrolytic copolycondensation reaction is carried out with tetraethoxysilane, and thus the fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite material is obtained. In the temperature range of 100-440 K, the ratio of the fluorescent carbon quantum dots of the composite material to the fluorescence intensity of a fluorescent powder of the composite material has good linear relationship with the temperature, so that a way based on fluorescence thermal quenching is provided for temperature sensing detection. The fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite temperature sensing material has the obvious advantages of high stability, fast response, high sensitivity and the like, and has good application prospects.
Owner:SOUTH CHINA AGRI UNIV
Gas sensitive element by taking single-walled carbon nanotube/phthalocyanine composite material as ammonia-sensitive material and preparation method thereof
InactiveCN103308563AImprove stabilityImprove performanceMaterial resistanceCarbon nanotubePhthalocyanine
The invention discloses a gas sensitive element by taking a single-walled carbon nanotube / phthalocyanine composite material as an ammonia-sensitive material and a preparation method thereof and relates to a gas sensitive element for measuring ammonia concentration and a preparation method thereof. The invention aims to solve the problems that a gas sensitive element by taking a single single-walled carbon nanotube as an ammonia-sensitive material is poor in reversibility and a gas sensitive element by taking metal phthalocyanine as an ammonia-sensitive material is high in resistance value. The gas sensitive element by taking the single-walled carbon nanotube / phthalocyanine composite material as the ammonia-sensitive material consists of an interdigital electrode and a single-walled carbon nanotube / phthalocyanine composite material. The preparation method comprises the following steps: 1. preparing a carboxylated single-walled carbon nanotube; 2. preparing the single-walled carbon nanotube / phthalocyanine composite material; and 3. dispensing to obtain the gas sensitive element by taking the single-walled carbon nanotube / phthalocyanine composite material as the ammonia-sensitive material. The invention can be used for preparing the gas sensitive element by taking the single-walled carbon nanotube / phthalocyanine composite material as the ammonia-sensitive material.
Owner:HEILONGJIANG UNIV
Tumor-targeted T1-T2 double nuclear magnetic resonance imaging contrast agent and preparation method and application thereof
ActiveCN104758956ASuperparamagneticHas a relaxation-enhancing effectEmulsion deliveryIn-vivo testing preparationsTumor targetFerrous salts
The invention relates to a tumor-targeted T1-T2 double nuclear magnetic resonance imaging contrast agent and a preparation method and an application thereof. The contrast agent comprises hyaluronic acid-coated ferroferric oxide composite magnetic nanoparticles, wherein the molecular formula of hyaluronic acid is as shown in the specification; n is an integer of 17-290. The preparation method of the contrast agent comprises the following steps: (1) dissolving hyaluronic acid into deionized water, introducing a gas, and heating to obtain a reaction system A; (2) dissolving ferric salt and ferrous salt into a strong acid to obtain a solution B; (3) injecting the solution B into the reaction system A, adjusting the pH to be alkaline, and then refluxing at a high temperature to obtain a reaction system C; and (4) cooling a reaction system C to a room temperature, and dialyzing to obtain the contrast agent. The invention further provides an application of the contrast agent in T1 and T2 weighted imaging in in-vivo and in-vitro nuclear magnetic resonance. The contrast agent provided by the invention has superparamagnetism and outstanding T1 and T2 relaxation enhancement effects, and is suitable for being used as a T1-T2 double nuclear magnetic resonance imaging contrast agent.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Preparation and quality detection method of compound prescription cortex phellodendri chinensis fluid
InactiveCN104398642AAccurate massAccurate quality inspectionAntibacterial agentsComponent separationBerberis empetrifoliaForsythia
The invention discloses preparation and quality detection method of compound prescription cortex phellodendri chinensis fluid. The quality detection method comprises the identification of forsythia fruit, cortex phellodendri, honeysuckle and dandehon herb, the checking of lonicerae flos, and the content determination of forsythin and berberine hydrochloride. According to the determination method, spots with the same colors are formed in a qualified test article thin-layer chromatogram and in corresponding positions of a reference substance thin-layer chromatogram, and negative control is interference-free, and the method is good in selectivity, simple and accurate. The checking method of lonicerae flos adopts a high performance liquid chromatography, is good in specificity, and can distinguish the situation that lonicerae flos is adopted in the compound prescription cortex phellodendri chinensis fluid to pretend honeysuckle flower to charge material. The content determination of forsythin and berberine hydrochloride is good in linear relation and high in recovery test accurancy, has good repeatability and stability, can accurately and strictly detect the quality of the compound prescription cortex phellodendri chinensis fluid, and guarantees a high quality standard level of the compound prescription cortex phellodendri chinensis fluid.
Owner:SHANDONG HANFANG PHARMA
Abandoned land remote sensing recognition method based on texture and vegetation indexes
ActiveCN103914678AImprove recognition efficiencySolve the accuracy problemCharacter and pattern recognitionMultiple sensorImage registration
The invention relates to an abandoned land remote sensing recognition method based on texture and vegetation indexes. The characteristics of multiple sensors, multiple resolutions, multiple spectra and multidate remote sensing data are utilized, the spectra and the textural features of remote sensing images, and the vegetation index features are combined, and the abandoned land remote sensing recognition method based on the texture and the vegetation indexes is established by structuring a remote sensing image registration and fusion framework, a spectrum and texture feature space and a vegetation index time sequence. Compared with an existing abandoned land remote sensing recognition method, the abandoned land remote sensing recognition method based on the texture and the vegetation indexes solves the precision problem brought by broken cultivated land, reduces artificial involvement subjectivity and improves abandoned land recognition efficiency. The abandoned land remote sensing recognition method based on the texture and the vegetation indexes is characterized in that a remote image registration and fusion unit, a typical spectrum and texture feature unit, a vegetation index time sequence feature unit and an abandoned land recognition and information extraction unit are included. Through the abandoned land remote sensing recognition method with the four units, the distribution information and data of abandoned land in a large range area can be recognized fast and precisely, and auxiliary decision-making data support can be provided for land utilization, grain guarantee and the like.
Owner:INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
Detection method for adulterated tea oil
ActiveCN103217393APrevent impersonationProtect interestsColor/spectral properties measurementsFull waveRefractive index
The invention relates to the technical field of edible oil, and provides a method for detecting the adulterated tea oil. The method comprises the following steps of: firstly, establishing a refractive index, an iodine value, a saponification value and an oleic acid content adulteration detection model, determining the adulteration type by detecting the sample, then, determining an adulteration quantity model through ultraviolet spectrum full-wave scanning, and comparing the data to obtain the determined adulteration quantity. According to the method provided by the invention, not only can the adulteration type for the tea oil be identified, but also the adulteration quantity can be detected, so that cheap edible oil can be prevented from being used for personating expensive tea oil. The method provided by the invention has the characteristics of being economical and simple, excellent in repeatability and high in accuracy, and the like, can be practically used for the teal oil adulteration detection work, and can guarantee and safeguard the benefits of consumers.
Owner:SOUTH CHINA AGRI UNIV
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