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34results about How to "Concentration effect" patented technology

Preparation method of high specific surface area porous carbon doped iridium catalyst for water electrolysis for generating hydrogen

ActiveCN108546962AFacilitate adjustment of particle sizeConcentration effectElectrodesIonCorrosion resistant
The invention provides a preparation method of a high specific surface area porous carbon doped iridium (HAPC / Ir) catalyst for water electrolysis for generating hydrogen, and belongs to the technicalfields of chemical power supply and new materials. According to the preparation method, MOF-5 is taken as the template, and the prepared material is applied to electrode materials. Through an impregnation method, iridium ions are merged to an organic frame made of MOF-5 through impregnation to obtain a precursor, and finally the precursor is made into the high specific surface area porous carbon doped iridium (HAPC / Ir) catalyst. The method and operation are simple, the equipment requirements are low, and high specific surface area porous carbon materials can be prepared massively. The technical process has the characteristics that the corrosion resistant performance of a positive electrode catalyst for water hydrolysis is enhanced in acidic electrolyte, and moreover, the stability of the catalyst is improved. Furthermore, the raw material (HAPC / Ir) is mild, nontoxic and safe, the resources of part materials are wide, and the industrial prospect is good.
Owner:SHANGHAI UNIV

AlGaN/GaN HEMT device with vertical structure and method for manufacturing device

The invention discloses an AlGaN / GaN HEMT device with a vertical structure. The device comprises a substrate, an n+GaN layer, a high-resistance GaN layer, an intrinsic GaN layer and an AlGaN layer sequentially formed on the substrate, drain electrodes in Ohm contact with the n+GaN layer, source electrodes in Ohm contact with the AlGaN layer, and gate electrodes, wherein the high-resistance GaN layer is used as a current-blocking layer and includes current conducting through holes formed by injecting Si ions; the current conducting through holes up and down pass through the high-resistance GaN layer. The invention further discloses a method for manufacturing the AlGaN / GaN HEMT device. The vertical structure can be formed on the sapphire or Si substrate with the relatively low price, and the AlGaN / GaN HEMT device is good in current resistance and current transmission, high in voltage-withstanding performance and low in electric leakage.
Owner:SUZHOU NENGWU ELECTRONICS TECH

Light-catalyzed reaction negative-pressure loop circuit automatically testing system

The invention discloses a self-testing system of negative pressure loop of optical catalyzed reaction, which comprises the following parts: reacting part with magnetic stirrer, reactor, xenon lamp source, circulating part with magnetic glass piston pump, spherical glass condenser, gas-phased chromatogram, reactor, blowing vacuum extracting part with ten-shaped four-way vacuum piston, scrubbing bottle, precise vacuum pressure list and vacuum pump, sampling detecting part with gas phased chromatogram, automatic six-way sampling valve, gas-carrier bottle and gas driving bottle, temperature control part with thermostatic circulating pump, reactor temperature control jacket and spherical glass condenser. The invention can estimate the catalytic property of catalyst precisely and in time, which is fit for other optical catalyzed reacting tests in relative to gas participation or generation.
Owner:XI AN JIAOTONG UNIV

Centrifugal tube structure for extracting DNA (deoxyribonucleic acid) by adopting silicon bead method

The invention relates to a centrifugal tube structure for extracting DNA (deoxyribonucleic acid) by adopting a silicon bead method, belonging to the technical field of instruments for separating and purifying nucleic acid DNA or RNA (Ribonucleic Acid). The centrifugal tube structure comprises a centrifugal tube with a centrifugal tube cavity, an inner sleeve, and an impurity filtering mechanism, wherein a connecting band is arranged at the upper part of the centrifugal tube, and a plug cover is arranged at the tail end of the connecting band; the inner sleeve is arranged in the centrifugal tube cavity of the centrifugal tube, and a center hole is arranged at the center of the bottom wall of the inner sleeve; the impurity filtering mechanism is matched with the lower part of the inner sleeve and arranged in the centrifugal tube cavity along with the inner sleeve, and the plug cover is matched with an inner sleeve orifice of the inner sleeve. The centrifugal tube structure has the advantages that the loss of water-soluble DNA templates can be avoided; the impurity removal effect is desirable so as to favorably ensure the amplication of the PCR; the advantages of being convenient, fast and effort-saving to operate can be fully shown; and not only can the influence of TES and SLS on the concentration of adsorption liquid be prevented, the adsorption capability of silicon beads to the DNA can be ensured, but also original DNA templates can be retained so as to obviously improve the detection rate of low-copy biological detection materials.
Owner:成都迪盾生物技术有限公司

Efficient stirring device for environmental governance

The invention relates to the technical field of environmental governance accessory devices, in particular to an efficient stirring device for environmental governance. The efficient stirring device is simple in structure, reduces vortexes generated in the stirring process, can scrape off solids or other impurities on the inner wall of a stirring kettle, reduces the influence on the concentration of a governance liquid in the stirring process, improves the stirring speed, and improves the practicability. The efficient stirring device comprises a stirring kettle, wherein the stirring kettle is hollow, the top of the stirring kettle is communicated with an opening, a driving box is arranged at the opening of the stirring kettle and comprises a first ring body and a second ring body which are fixedly connected, a gear ring is fixedly connected to the interior of the first ring body, four planetary gears are meshed with the inner wall of the gear ring and are arranged in a circumferential array, the four planetary gears are meshed with a sun gear, the inner ring of the sun gear is fixedly connected with a driving shaft, the top end of the driving shaft is provided with a driving motor, the driving shaft is provided with a first bearing, the outer ring of the first bearing is fixedly connected with a base, and the four corners of the base are each provided with a second bearing.
Owner:东莞市丰泽精密模具有限公司

Element mercury and divalent mercury standard gas generation system and working method thereof

The invention discloses an element mercury and divalent mercury standard gas generation system and a working method thereof, and belongs to the technical field of gaseous mercury monitoring and analysis. A first inlet of a siphon type tee joint is connected with a low-temperature end of a gradient evaporation chamber, a high-temperature end of the gradient evaporation chamber is connected with thetee joint through a carrier gas pipeline, and the tee joint is further connected with a second inlet and a preheater; the preheater is connected with a flow valve, the flow valve is connected with afilter, and the filter is connected with a nitrogen storage device; an outlet is connected with two branches, a reduction reactor and an elemental mercury standard gas control valve are arranged on one branch, and a divalent mercury standard gas control valve is arranged on the other branch; and a heating module is arranged outside the gradient evaporation chamber, the gradient evaporation chamberis connected with a liquid inlet device, the liquid inlet device is connected with a stop valve, the stop valve is connected with a pump, and the pump is connected with a mercuric chloride standard liquid storage device. The structure design is reasonable, stable output of mercury standard gas concentrations of different valence states is achieved, and accuracy of mercury and mercury compound detection equipment checking and related scientific tests is guaranteed.
Owner:HUANENG POWER INTERNATIONAL +1

Sewage detection device

The invention relates to the technical field of sewage detection, and particularly discloses a sewage detection device which comprises a sewage detection device body and a sewage tank connected with awater inlet pipe and a water outlet pipe. The water inlet pipe is connected with a first weeping pipe; a fixed box is fixed on the sewage tank, and a sliding box is slidably connected into the fixedbox; a spring is arranged between the bottom of the fixed box and the bottom of the sliding box; a push switch is fixed at the bottom of the fixed box; water in the first weeping pipe can drip into the sliding box; a first water outlet hole is formed in the sliding box; a second water outlet hole is formed in the fixed box; the second water outlet hole is communicated with the sewage tank; an automatic three-way valve is arranged on the drainage pipe, the other two outlets of the automatic three-way valve are connected with a sewage pipe and a flushing water pipe respectively, and the pressingswitch is electrically connected with the automatic three-way valve through a controller. The invention aims to solve the problem of inconvenience in operation caused by switching between sewage detection and flushing of a sewage tank by manually shifting a lifting block.
Owner:贵州金洋检测工程有限公司

Safe diffusing device for gas transmission and using method

The invention belongs to the technical field of gas power generation sets, and provides a safe diffusing device for gas transmission and a using method. The safe diffusing device for gas transmission is provided with a hollow cylinder (3) with the two ends closed, an air inlet pipe (4) is arranged in the hollow cylinder (3), and the diameter of the air inlet pipe (4) is smaller than that of the hollow cylinder (3); the air inlet pipe (4) is provided with a straight pipe section, and a gap is formed between an air outlet of the lower end of the straight pipe section and the bottom face of the hollow cylinder; a bent pipe section bent toward one side is arranged at the upper end of the straight pipe section, an outlet of the bent pipe section is located at the upper end of one side wall face of the hollow cylinder (3), and water for carrying out water seal on gas exists in the gap between the air inlet pipe (4) and the hollow cylinder (3); a water level control valve is installed on one side wall face of the hollow cylinder (3), and a diffusing opening (5) is formed in the upper end face of the hollow cylinder (3). Constant pressure diffusion at multiple pressure levels is achieved to meet different process requirements, and the function of pressure stabilization and overpressure diffusion is achieved.
Owner:HENAN DIESEL ENGINE IND

Automatic anaerobic three-phase separation system and control method

The invention relates to an automatic anaerobic three-phase separation system and a control method. The system comprises a reactor, a three-phase separator arranged inside the reactor, and a water-sealing assembly and a controller which are arranged outside the reactor, wherein the three-phase separator comprises a plurality of gas collecting hoods arranged in parallel, a gas collecting pipe communicating with the upper ends of the gas collecting hoods, and a gas chamber liquid level gauge installed on the upper end of any one gas collecting hood, the water-sealing assembly comprises a water-sealing tank, and a gas outlet pipe, a water inlet pipe, a water outlet pipe and a water-sealing liquid level gauge which are installed on the water-sealing tank, the gas collecting pipe extends into the water-sealing tank, a first valve is installed on the water inlet pipe, a second valve is installed on the water outlet pipe, and the controller is electrically connected with the gas chamber liquid level gauge, the water-sealing liquid level gauge, the first valve and the second valve, respectively. The three-phase separation system consisting of the three-phase separator with a double-layer inverted V-shaped structure, and a water-sealing tank is adopted, and the gas chamber pressure can be automatically adjusted through the coordinated control of the controller to match system operation.
Owner:苏州红昇环保科技有限公司

Device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances

ActiveCN103116005AGood for concentration measurementConcentration effectMaterial exposibilityPhysicsEnvironmental geology
The invention discloses a device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances. The device comprises a hydrocarbon refrigerant concentration measuring system, a refrigerant temperature and flow control system and a quality measuring system. The device is characterized by further comprising a box body temperature control system and an external thermal insulation layer, the influence of the hot-air convection to the quality measuring system can be reduced due to the design, the refrigerant temperature and flow control system adopts an external storage pipeline mechanism, the quality measuring system adopts a three-point weighing and measuring structure, and a concentration measuring sensor of the hydrocarbon refrigerant concentration measuring system is externally arranged; and the device is mainly used for the measuring whether the leaked hydrocarbon refrigerant reaches the lower-explosive limit or not for the refrigerator and the air conditioner, is controlled by a PLC (programmable logic controller), has the functions of refrigerant heating and releasing controlling, concentration measuring, and alarming when the leaked hydrocarbon refrigerant reaches the explosive limit, and has a first-stage alarm function and a second-stage alarm function when the leaked hydrocarbon refrigerant reaches the explosive limit.
Owner:CQC INTIME TESTING TECH CO LTD

Automatic cleaning method of liquid metering and adding device

The invention discloses an automatic cleaning method of a liquid metering and adding device, and aims at automatically cleaning the liquid metering and adding device. The method comprises the steps of setting the height of an upper water level sensor and a lower water level sensor; opening a water inlet solenoid valve to add liquid; stopping adding the liquid when the upper water level sensor detects the liquid, and opening a water outlet solenoid valve to add liquid; closing the water outlet solenoid valve and opening the water inlet solenoid valve when the lower water level sensor cannot detect the liquid; determining that the current time exceeds a certain time when the time interval between the time that the upper water level sensor detects the liquid and the time that the lower water level sensor cannot detect the liquid exceeds a certain of limitation; determining whether the lower water level sensor can detect the liquid; if not starting an automatic cleaning device. With the adoption of the method, the liquid metering and automatic adding device can be automatically cleaned; in addition, the device is cleaned at the time close to the closing time; therefore, no water is accumulated in a water storing tank for next use, and the influence on the agent concentration can be avoided.
Owner:QINGDAO JIAHEXING MILLING

Stainless steel tube washing and drying device and stainless steel tube washing and drying method

The invention discloses a stainless steel tube washing and drying device which consists of a support rack (4), wherein a group of transmission rollers (3) are arranged on the support rack (4); a spraying mechanism and a blowing mechanism are arranged in parallel above the one group of the transmission rollers (3); an upper cover (9) is arranged above the spraying mechanism and the blowing mechanism; a collecting tank (5) is arranged below the support rack (4); the collecting tank (5) is connected with a water tank (8) by virtue of a water pump (6); the blowing mechanism comprises an air pump (1); the air pump (1) is provided with a nozzle (2) by virtue of an air tube. The device can be used for alleviating the influence on a pickling liquid, and improving the drying efficiency of the drying device, and therefore the processing effect on a stainless steel tube is ensured.
Owner:HUZHOU RONGHENG STAINLESS STEEL

Phosphated residue treatment system and technology in wire surface treatment production line

The invention discloses a phosphated residue treatment system in a wire surface treatment production line. The phosphated residue treatment system comprises a first phosphating cylinder, a second phosphating cylinder and a centrifugal separator, the first phosphating cylinder communicates with an inlet of the centrifugal separator through a first pipeline, a first cam pump and a first solenoid valve are mounted on the first pipeline, the second phosphating cylinder communicates with the inlet of the centrifugal separator through a second pipeline, a second cam pump and a second solenoid valveare mounted on the second pipeline, a liquid outlet of the centrifugal separator communicates with the first phosphating cylinder through a third pipeline and communicates with the second phosphatingcylinder through a fourth pipeline, and a third solenoid valve is mounted on the third pipeline, a fourth solenoid valve is mounted on the fourth pipeline, and aeration pipes are mounted in the firstphosphating cylinder and the second phosphating cylinder.
Owner:BAOSTEEL GRP NANTONG WIRE PROD +1

Oxidization fluid for reducing content of highly oxidizable substance (SO2) in electronic-grade sulfuric acid and preparation method of oxidization fluid

The invention relates to an oxidization fluid for reducing the content of a highly oxidizable substance (SO2) in electronic-grade sulfuric acid and a preparation method of the oxidization fluid. The oxidization fluid for reducing the content of the highly oxidizable substance (SO2) in the electronic-grade sulfuric acid comprises the following main components: hydrogen peroxide which accounts for 1-30% of the total weight of the oxidization fluid, an inorganic acid which accounts for 0.01-30% of the total weight of the oxidization fluid, and the balance of water. The content of the highly oxidizable substance (SO2) in the electronic-grade sulfuric acid is an important index which can directly affect the quality of electronic-grade sulfuric acid, and by adopting the hydrogen peroxide systemoxidization fluid, the content of the highly oxidizable substance (SO2) in the electronic-grade sulfuric acid can be reduced; in addition, as the reaction generation substance is sulfuric acid, no other impurity can be introduced.
Owner:湖北兴福电子材料股份有限公司

Water softening equipment control method and device, water softening equipment and storage medium

The invention relates to a water softening equipment control method and device, water softening equipment and a storage medium. The method comprises the steps that when the working state switching condition of the water softening equipment is met, if switching to a target working state needs to be conducted, station switching of a multi-way valve is needed, and the on-off state of a first pipeline connected with a salt box and the multi-way valve is obtained; if the on-off state of the first pipeline is open, the first pipeline is controlled to be closed; and after the first pipeline is controlled to be closed, the multi-way valve is controlled to perform station switching. By adopting the method, water in the multi-way valve can be prevented from entering the salt box through the first pipeline to generate water channeling, so that the concentration of the salt solution in the salt box is prevented from being influenced, the regeneration condition consistency is ensured, and the regeneration effect is improved.
Owner:GREE ELECTRIC APPLIANCES INC

Wire rod surface phosphated residue treatment method

The invention mainly provides a wire rod surface phosphated residue treatment method. According to the method, a cam pump is cooperated with a centrifugal separator to carry out online separation on amixture in a phosphating cylinder, and separated phosphating solution can return to the phosphating cylinder, so that treatment of the phosphated residue is carried out without halt production; in addition, centrifugal separation can ensure full separation of residue and liquid to increase the utilization ratio of the phosphating solution; and moreover, the phosphating solution directly returns to the phosphating cylinder to ensure that the parameter is not changed, and the phosphating effect is not affected.
Owner:BAOSTEEL GRP NANTONG WIRE PROD

Water quality microbiological detection device and detection method

The invention relates to a water quality microbiological detection device used for microbiological detection in a water sample. The water quality microbiological detection device comprises a detectorbody, a detection unit and a heating unit, wherein a detection cavity is arranged in the detector body; the detector body is provided with a first communicating hole and a second communicating hole; the first communicating hole is located at the top of the detector body, so as to fill liquid in the detection cavity by virtue of the second communicating hole, and gas in the detection cavity can beemptied by virtue of the first communicating hole and can overflow from the first communicating hole; and a filter element is arranged in the detection cavity, and the filter element is connected withthe second communicating hole, so as to stop microorganisms from being discharged from the second communicating hole. The first communicating hole is formed in the top of the detector body, and the air can be evacuated, so that the detection cavity can be full of the filled liquid, the liquid flows out, produces negative pressure and sucks in the water sample, the two communicating holes in the detector body can be conveniently and directly connected with a pipeline, and online real-time automatic detection on the microorganisms is realized.
Owner:QINGDAO JIAMING MEASUREMENT & CONTROL TECH

Processing device for one yarn with multiple colors

The invention discloses a processing device for one yarn with multiple colors. The processing device comprises a yarn feeding mechanism, a preprocessing mechanism, a drawing and stretching mechanism and a take-up mechanism, wherein an etching device is arranged between the yarn feeding mechanism and the preprocessing mechanism; the etching device consists of two or more etching grooves which accommodate etching solutions of different concentrations; yarn guide rolls are mounted at two ends of each etching groove; yarn pressing rotary drums are arranged under the yarn guide rollers and in the etching grooves; the drawing and stretching mechanism comprises two drawing and stretching structures which are first drawing and stretching structures or second drawing and stretching structures, and each drawing and stretching structure comprises a drawing and stretching roller and a pressing wheel which are mutually matched; the drawing and stretching rollers of the first drawing and stretching structures, or the drawing and stretching rollers of the second drawing and stretching structures generate intermittent tension through moving up and down. The drawing and stretching rollers of the upper and lower drawing and stretching structures generate the intermittent tension through moving up and down, so that a part of fibers of the yarns are snapped or generate stress rupture, the color staining capacity of the part of the fibers of the yarns is changed, and the color effect of different shades is presented during follow-up color dyeing, so that the purpose that one yarn has multiple colors can be realized.
Owner:FUJIAN HUAFENG NEW MATERIALS

Method for keeping reagent delivery concentration

PendingCN113154260AGuaranteed Delivery ConcentrationIncrease profitPipeline systemsBiomedical engineeringLotion
The invention discloses a method for keeping reagent delivery concentration. According to the specific implementation scheme of the method, a first lotion is injected into a delivery pipe before an anhydrous alcohol enters the delivery pipe; and the first lotion and the anhydrous alcohol are mutually insoluble. The method is simple and convenient to operate; the anhydrous alcohol can be effectively prevented from being diluted in the delivery pipe, and then the delivery concentration of the anhydrous alcohol in the delivery pipe can be guaranteed; and accordingly, the usage amount of the anhydrous alcohol can be accurately adjusted.
Owner:北京柯莱文科技咨询有限公司

A kind of thread multi-color processing device

The invention discloses a processing device for one yarn with multiple colors. The processing device comprises a yarn feeding mechanism, a preprocessing mechanism, a drawing and stretching mechanism and a take-up mechanism, wherein an etching device is arranged between the yarn feeding mechanism and the preprocessing mechanism; the etching device consists of two or more etching grooves which accommodate etching solutions of different concentrations; yarn guide rolls are mounted at two ends of each etching groove; yarn pressing rotary drums are arranged under the yarn guide rollers and in the etching grooves; the drawing and stretching mechanism comprises two drawing and stretching structures which are first drawing and stretching structures or second drawing and stretching structures, and each drawing and stretching structure comprises a drawing and stretching roller and a pressing wheel which are mutually matched; the drawing and stretching rollers of the first drawing and stretching structures, or the drawing and stretching rollers of the second drawing and stretching structures generate intermittent tension through moving up and down. The drawing and stretching rollers of the upper and lower drawing and stretching structures generate the intermittent tension through moving up and down, so that a part of fibers of the yarns are snapped or generate stress rupture, the color staining capacity of the part of the fibers of the yarns is changed, and the color effect of different shades is presented during follow-up color dyeing, so that the purpose that one yarn has multiple colors can be realized.
Owner:FUJIAN HUAFENG NEW MATERIALS

Multi-principle smoke dust measuring instrument

The invention discloses a multi-principle smoke dust measuring instrument, and belongs to the field of smoke dust detection. The smoke and dust communicating unit comprises a smoke and dust channel and a collecting cover, the collecting cover is arranged on the inner side of the bottom of the mounting cylinder, and a top connector of the collecting cover is connected with the bottom end of the smoke and dust channel; the laser smoke dust detection unit comprises an inclined cylinder, a torsion head, a laser scattering receiver, a laser transmitter and a laser transmission receiver, the inclined cylinder is arranged on the right side of the bottom end of the smoke dust channel, the second inclined cylinder is arranged at the bottom of the left side of the smoke dust channel, and the third inclined cylinder is arranged at the top of the left side of the smoke dust channel; the right inclined cylinder corresponds to the left bottom inclined cylinder, the ends of the three inclined cylinders are in threaded connection with torsion heads, a laser transmitter is arranged on the inner side of the right torsion head, a torsion head inner side laser scattering receiver on the left top and a torsion head inner side laser transmission receiver on the left bottom are arranged on the inner side of the right torsion head; the smoke concentration can be measured by using two principles, the application range is wide, and the detection result is accurate.
Owner:NANJING BORY AUTOMATION TECH CO LTD

Salt content detection method and device, electrolysis control method and device, detection circuit and sterilizer

The invention relates to the technical field of disinfectant manufacturing, and discloses a salt content detection method and device, an electrolysis control method and device, a detection circuit and a sterilizer. The salt content detection method comprises the steps: acquiring the magnitude of current between a first electrolysis electrode and a second electrolysis electrode; based on the magnitude of current, determining the electric conductivity corresponding to the current magnitude of current; and determining the salt amount in a current electrolytic solution based on the electric conductivity and a pre-established corresponding relation between the electric conductivity and the salt amount. By implementing the methods and the devices, the salt amount in the current electrolytic solution can be accurately determined under the condition that the salt adding amount is not determined, so that the generation concentration of a sodium hypochlorite solution can be controlled.
Owner:GREE ELECTRIC APPLIANCES INC

Cold cathode fluorescent lamp electrode inner coating method

InactiveCN103035455AGuarantee the purity of the potionEnsure low work functionCold cathode manufactureCesium sulfateEngineering
The invention provides a cold cathode fluorescent lamp electrode inner coating method. Cesium sulfate dark potion passes through a dropper and a needle head to enter a cold cathode fluorescent lamp electrode cup through high-pressure blowing. Liquid level height of the dark potion in the electrode cup is controlled to be 2 / 3 to 4 / 5 of height of the electrode cup. When the dark potion arrives at a set liquid level, the surplus dark potion is absorbed away, the electrode cup is dried and coated at the temperature of 250 DEG C, and electrode inner coating is finished. In a whole technological process, a cesium sulfate solution is in the closed environment so as to avoid influence on the dark potion due to volatilization of H2O, potion purity degree is guaranteed, the cesium sulfate solution can be fully coated on the inner surface of the electrode cup, and low work function of electrode emitting materials is guaranteed. The surplus potion in the electrode cup is absorbed, consumption of the dark potion is reduced, and electrode sealing quality is improved. Dark potion flow amount in the dropper can be controlled accurately through the high-pressure blowing, and accuracy and stability of supply of the dark potion are guaranteed.
Owner:YICHANG JINSEN OPTRONICS TECH +1

Positive standard substance for detecting Newcastle disease viruses and H9N2 subtype avian influenza viruses, and preparation method and application of positive standard substance

The invention belongs to the field of molecular biology detection, and particularly relates to a positive standard substance for detecting Newcastle disease viruses and H9N2 subtype avian influenza viruses, and a preparation method and application of the positive standard substance. Amplification primers of the H9N2 subtype avian influenza viruses and amplification primers of the Newcastle diseaseviruses are screened, amplified target fragments are connected with vectors, positive recombinant plasmids are screened and verified, the concentration of the positive standard substance is calculated, a standard curve of the standard substance is plotted, and qualitative and quantitative detection is achieved; and finally, by preparing and applying the stable and efficient positive standard substance, qualitative and quantitative detection of samples to be tested is achieved, and thus the positive standard substance is extremely suitable for diagnosis of the Newcastle disease viruses and theH9N2 subtype avian influenza viruses.
Owner:POULTRY INST SHANDONG ACADEMY OF AGRI SCI
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