107 results about "Chlorpyrifos" patented technology

The invention provides a V2O5-NC nano-enzyme as well as preparation and application thereof. The V2O5-NC nano-enzyme is dark green powder and has a stacked layered structure, the specific surface area is 16-18m < 2 > / g, mesoporous distribution is realized, the average particle size is 20-25nm, and the V2O5-NC nano-enzyme has catalase-like activity. The wide-interlayer-spacing V2O5-NC nano-enzyme based on C-O bond bridging prepared by the invention has relatively good stability, can be prepared on a large scale, is convenient to store, has good affinity to catalytic chromogenic substrates, has high stability, and has universality for the chromogenic reaction of the catalytic chromogenic substrates (TMB, ABTS, DAB and OPD). The V2O5-NC nano-enzyme disclosed by the invention is used for analyzing five organophosphorus pesticides (parathion-methyl, glyphosate, phoxim, methamidophos and chlorpyrifos), has good pesticide recognition capability and interference resistance, and also has the advantages of wide linear range, low detection limit, simplicity and convenience in operation, low detection cost and the like.

The present invention discloses a preparation method of an enhanced hydrolytic nanozyme for the degradation of organophosphorus pesticides. The broad-spectrum nucleic acid aptamer BSAPT is modified on the surface of a metal zirconium organic framework MOF-808 in various ways to form a MOF-808 / BSAPT or MOF-808-BSAPT enhanced hydrolytic nanozyme for selective and efficient degradation of organophosphorus pesticides. The enhanced hydrolytic nanozyme prepared by the present invention can simulate phosphatase activity and broadly identify a variety of highly toxic organophosphorus pesticides. The organophosphorus pesticide broad-spectrum nucleic acid aptamer BSAPT actively recognizes and captures organophosphorus compounds, enriches the target molecule to the Lewis acidic Zr(IV) active site center of MOF-808, and achieves selective and efficient degradation of organophosphorus pesticides by nucleophilic attack on the electrophilic group of the phosphorus atom center of the organophosphorus compound substrate. It can effectively degrade a variety of highly toxic organophosphorus pesticides such as chlorpyrifos, profenofos, and methyl parathion. The invention has simple preparation materials, low cost, fast degradation rate and broad spectrum, and can be applied to the degradation of various organophosphorus pesticides in water bodies.

The invention discloses a detection method for high-sensitivity detection of chlorpyrifos based on OPECT and application, a prepared TiO2 / CdS / CPF gate electrode, an OECT transistor, a reaction chamber and a PBS buffer solution are assembled into a biosensor, an object to be detected is dropped on the surface of the gate electrode and irradiated by an LED light source, OPECT detection is carried out, and high-sensitivity and high-specificity detection of chlorpyrifos (CPF) is successfully realized. According to the detection method, a traditional gate electrode is replaced with a TiO2 / CdS heterojunction, the TiO2 / CdS heterojunction serves as a photosensitive gate to be introduced into an organic photoelectrochemical transistor (OPECT) system, the light absorption capacity and the charge separation efficiency are remarkably improved through the narrow-band gap synergistic effect of the heterojunction, and the bottleneck that traditional TiO2 is low in photoelectric conversion efficiency is solved.

The invention discloses a mixed blank matrix for vegetable pesticide residue analysis and detection and its application, including the preparation of blank matrix and the preparation of mixed blank matrix, the raw materials of mixed blank matrix are calculated by weight: 20-30 parts of Chinese cabbage, 20-40 parts of cucumber, 10-40 parts of spinach, 5-30 parts of cauliflower; after the blank matrix and the mixed blank matrix are pre-treated, the matrix matching standard solution establishes a standard curve, and the pure solvent standard curve is established at the same time; the corresponding matrix effect is calculated using the slope; the matrix matching degree is calculated; the practicality of the mixed blank matrix is ​​evaluated. The mixed blank matrix can reduce or eliminate the matrix effect, and is suitable for the simultaneous determination of the residual amounts of dichlorvos, chlorpyrifos, pirimicarb, metalaxyl, chlorpyrifos, triadimefon, procymidone, myclobutanil, propiconazole, bifenthrin and etoxazole in 8 different vegetables (cucumber, Chinese cabbage, spinach, cauliflower, lettuce, celery, green onion, green vegetables), which can improve work efficiency, reduce the time cost caused by the blindness of obtaining blank matrix, and reduce the maintenance cost of the instrument.

The application relates to a preparation method of a biosensor. The application relates to a preparation method of a portable pesticide detection biosensor based on acetylcholinesterase (AChE)@poly(allylamine hydrochloride)-hydrogen bond organic framework (PAH-HOF) and application of the biosensor in on-site rapid chlorpyrifos detection, and belongs to the technical field of biosensors. According to the method, AChE is combined with poly(allylamine hydrochloride) (PAH) to change the surface charge and promote self-assembly of the AChE and the hydrogen bond organic framework (HOF), so that an AChE@PAH-HOF composite material with high catalytic activity, high embedding rate and high stability is formed; then the material is integrated into a water-retaining glycerol-sodium alginate hydrogel (G-SA) matrix to construct a disc-shaped sensor. The sensor can be attached to the surface of plants and used for long-term in-situ monitoring of organophosphorus pesticides. In combination with an image processing algorithm, the system realizes accurate tracking of the chlorpyrifos degradation process on the surface of tomato plants, and the detection limit reaches 1 ng / mL. The application provides non-invasive and low-cost technical support for crop health management and sustainable precision agriculture.

This invention discloses a herbicidal composition containing propyzoxystrobin and chlorpyrifos, and its application, belonging to the field of pesticide technology. The active ingredients of this herbicidal composition are propyzoxystrobin and chlorpyrifos, with a weight ratio of propyzoxystrobin to chlorpyrifos of 1:5 to 5:1. Through the synergistic effect of the two active ingredients, this herbicidal composition addresses the seed dormancy and germination characteristics and resistance issues of black nightshade in pumpkin fields, achieving a synergistic control effect of "rapid-acting + long-lasting" and "closed + foliar" action. The control efficiency can reach over 80%, with an optimal ratio reaching as high as 93.1%. It also significantly increases pumpkin yield without adversely affecting pumpkin growth, solving the technical problems of the lack of dedicated control agents for black nightshade in pumpkin fields and the strong resistance of conventional agents in existing technologies.

This application relates to the field of pesticide compositions, specifically disclosing a water-dispersible granule of chlorpyrifos·acetamiprid and its preparation method, comprising the following raw materials in parts by weight: chlorpyrifos 40-50 parts; acetamiprid 15-25 parts; dispersant 8-12 parts; emulsifier 3-7 parts; synergist 0.5-1 part; mineral oil 3-5 parts; anti-caking agent 3-5.5 parts; cassava starch 2-8 parts; activated carbon powder 5.5-8 parts. The preparation method includes the following steps: S1, mixing the raw materials evenly according to the specified ratio; S2, granulating after air jet milling, drying, and sieving to obtain the water-dispersible granule. This application has the effect of inhibiting the migration of acetamiprid in the soil and reducing pesticide pollution of water resources.

The invention discloses a group of KASP primers for detecting drug resistance mutation of bemisia tabaci and application of the KASP primers, and relates to the technical field of agricultural biology. The KASP primer disclosed by the invention comprises a primer combination which is used for detecting resistance mutations of deltamethrin, spirodiclofen and chlorpyrifos, such as BtabM918V (BtabM918V), BtabL925I (BtabL925I), BtabT929V (BtabA2083V) and BtabF392W (BtabF392W). One or more primer combinations are used for detecting the drug resistance mutation of the bemisia tabaci. The group of KASP labeled primers has good specificity and high sensitivity, and can accurately detect the resistance mutation frequency of bemisia tabaci to insecticides.

The utility model relates to the technical field of chlorpyrifos detection cards, in particular to a high-sensitivity chlorpyrifos detection card which comprises a detection card body, an observation opening, a lifting hole and a threaded hole are formed in the top end of the detection card body, a transparent plate is arranged on the observation opening, a threaded column is arranged on the threaded hole, and the lifting hole is communicated with the transparent plate. A lifting hole is formed in the detection card body, a mounting groove is formed in one side of the detection card body, detection test paper is arranged on the mounting groove, an adjusting groove is formed between the lifting hole and the interior of the detection card body, a fastening groove is formed between the adjusting groove and the mounting groove, a lifting column is arranged on the lifting hole, and a clamping groove is formed in the fastening groove. A guide mechanism and an adjusting plate are arranged between the lifting column and the adjusting groove, the structure ensures that the detection test paper is always kept in a dust-free and dry environment in a non-use state through the detection card body, invasion of external pollutants, such as dust, moisture or other chemical substances, is avoided, and the detection test paper is convenient to use. Therefore, high sensitivity and detection efficiency of the test paper are maintained.

This invention discloses a method for cultivating long-branch Buddha's Hand fruit by cutting branches. The method uses a special variety called "Sunshine" and cultivates high-quality long-branch Buddha's Hand fruit by controlling the density of fruiting branches, spraying a 1500-fold dilution of 3% naphthaleneacetic acid during the bud stage to induce finger-shaped splitting, spraying a gibberellin-chlorpyrifos-potassium dihydrogen phosphate compound solution during fruit development to synergistically thicken the fruit stalk, adjusting the branch direction in summer to keep the fingertips pointing upwards, and combining this with midday shading. This method results in a 26.7% increase in fruit stalk diameter, a 6.4% increase in the number of fruits with open fingers, a 100.2% increase in the number of long-branch fruits, a 20.0% reduction in the number of fruits with fruit surface burns, and an 8.8% reduction in the number of fruits that fall off after harvest. The number of fresh-cut long-branch marketable fruits increases by 100.2%, and the long-branch marketable fruit rate reaches over 70%. Overcoming the bottlenecks of traditional cultivation such as weak fruiting ability of long branches, thin and weak fruit stalks that are easy to fall off, and easy damage to the fruit surface, the cultivated long-branch Buddha's Hand fruit has the advantages of being resistant to fruit drop, having a smooth fruit surface, having a well-developed fruit shape, and having suitable branches. It can be directly used for cut flower scenarios such as vase decoration and bouquet matching, creating a new category of Buddha's Hand cut fruit and significantly enhancing its ornamental and economic value.

The invention discloses a visual detection method for fruit and vegetable pesticide residues based on a colorimetric array sensor of a smart phone. The preparation method comprises the following specific steps: (1) preparing six types of silver nanoparticles with multifunctional surfaces by taking AgNO3 as a silver source, PVP (Polyvinyl Pyrrolidone), CTAB (Cetyltrimethyl Ammonium Bromide), Tween 80, branched polyethyleneimine, thiomalic acid and L-cysteine as surface modifiers and NaBH4 as a reducing agent and adopting a chemical reduction method; (2) silver nanoparticles are combined with gelatin, and a silver nanoparticle hydrogel patch is prepared; and 3) integrating a smart phone, and constructing a silver nanoparticle colorimetric array intelligent sensor with 1 * 6 sensing element points for visual detection and distinguishing of various pesticide residues on the surfaces of fruits and vegetables. The detection limits of the sensor on cyromazine, chlorpyrifos, imidacloprid, dichlorvos, mancozeb and cartap are 4.9 mg / L, 0.99 mg / L, 0.49 mg / L, 2 mg / L, 3 mg / L and 0.3 mg / L respectively. The method disclosed by the invention has the characteristics of low cost, high sensitivity, strong selectivity, intelligence, portability and the like, and can be used for synchronously detecting and distinguishing various analytes.

The invention relates to a preparation method of a biosensor, in particular to a construction method of an acetylcholin esterase (at) amorphous covalent organic framework (AChE (at) aCOFs-DB) photoenzyme integrated biosensor, and belongs to the technical field of biosensors. According to the method, an in-situ growth mineralization strategy is adopted, effective packaging of AChE in aCOFs-DB is achieved, the fluorescence performance of aCOFs is enhanced through a hydrogen bond auxiliary intramolecular rotation limitation design, and meanwhile the structural stability and catalytic activity of AChE are improved; the biosensor with high sensitivity and high selectivity is constructed based on the synergistic effect of fluorescence characteristics and enzyme catalytic performance; the sensor can be used for sensitive detection of organophosphorus pesticides such as chlorpyrifos, and the detection limit can reach a nanogram / milliliter level; the detection principle is as follows: AChE catalyzes a substrate to generate a product, and fluorescence quenching is caused by an inner filtering effect; when the organophosphorus pesticide (such as chlorpyrifos) exists, the AChE activity is inhibited, the catalytic capability is reduced, and a fluorescence signal is recovered, so that quantitative detection of the pesticide is realized; the preparation method is simple and convenient to operate and controllable in structure, is suitable for rapid detection of organophosphorus pesticides in agricultural products and environmental samples, and has a good application prospect.

The utility model discloses a continuous production device for chlorpyrifos emulsion in water, which belongs to the technical field of production of chlorpyrifos emulsion in water, and comprises an oil phase kettle tank body and a water phase kettle tank body, the right side of the top of the oil phase kettle tank body and the right side of the top of the water phase kettle tank body are respectively communicated with a feeding pipe; the oil agent and the water agent which are independently processed are distributed in the oil phase kettle tank body and the water phase kettle tank body, the driving motor is used for driving the stirring shaft and the stirrer to rotate to stir various raw materials, and then the flow meter is directly controlled after the oil agent and the water agent are processed. According to the proportion of the chlorpyrifos emulsion in water, the outflow amount of the oil agent and the water agent is controlled, then the oil agent and the water agent are mixed through a pipeline type shearing machine, after the mixed liquid is sheared, dispersed and emulsified in the pipeline type shearing machine, the formed emulsified synthetic liquid is not layered or turbid for a long time, and the stability of the chlorpyrifos emulsion in water is improved; the storage cost of semi-finished products is reduced, so that the chlorpyrifos emulsion in water can be continuously processed and produced.

The present invention discloses an analytical method for detecting the residues of various pesticides in tea leaves and tea soups. The method process is as follows: firstly classify the types of pesticides to be detected, respectively draw the standard curves of the pesticide standards to be detected by gas chromatography or liquid chromatography-tandem mass spectrometry (LC-MS / MS), extract the tea leaves or tea soup samples by solvent extraction, obtain the extracted sample liquid, and obtain the pesticide residue results by the above-mentioned standard curve after testing by gas chromatography GC or LC-MS / MS. The method of the present invention has the advantages of less interference from impurities, convenient sample pretreatment, reliable precision and accuracy, etc. The GC-ECD method can be applied to the trace analysis and detection of chlorpyrifos, bifenthrin, cypermethrin and cypermethrin in tea leaves and tea soup samples; the GC-FPD method can be applied to the analysis and detection of chlorpyrifos and malathion in tea leaves and tea soup samples; the LC-MS / MS method has high sensitivity, accurate qualitative analysis, and very low detection limit, and can be widely used in the trace analysis and detection of neonicotinoid pesticides in tea leaves and tea soup samples.

The application belongs to the field of food safety detection, and particularly relates to a food hazard double-mode detection method based on a three-dimensional folded paper-based microfluidic analysis device; the steps are as follows: step one, preparation of fluorescence-enhanced upconversion nanomaterial; step two, surface biological functionalization of the upconversion nanomaterial; step three, preparation of a double-metal organic framework with peroxidase activity; step four, preparation of a double-metal organic framework modified by a target aptamer; step five, preparation of a nano probe formed by coupling of the upconversion nanomaterial and the double-metal organic framework; step six, preparation of a three-dimensional folded paper-based microfluidic analysis device; step seven, rapid detection of food hazards by using the three-dimensional folded paper-based microfluidic analysis device; taking chlorpyrifos as an example, rapid and accurate detection of the content of chlorpyrifos in food is realized; meanwhile, the three-dimensional folded paper-based microfluidic analysis device with double-mode output has the capability of on-site real-time detection of hazards, and has a good practical prospect.

This invention discloses an aggregation-induced emission (AIE)-metal-organic framework probe, which is prepared by a one-pot solvothermal method using manganese chloride tetrahydrate as the metal center and 1,1,2,2-tetra(4-carboxyphenyl)ethylene as the organic ligand. This invention also discloses a method for detecting chlorpyrifos using a fluorescence sensing system constructed based on the aforementioned AIE-metal-organic framework probe. The AIE-metal-organic framework probe of this invention exhibits low fluorescence background, which reduces background signal interference during chlorpyrifos detection and improves sensitivity. Furthermore, the introduction of enzyme-mediated controllable recognition elements enables specific and sensitive detection of chlorpyrifos, with a detection limit of 3.79 ng / mL. ‑1 The aggregation-induced emission-metal-organic framework probe of this invention exhibits advantages such as high sensitivity, high selectivity, rapid response, stability, and ease of operation in the detection of chlorpyrifos, and has broad application prospects.

The invention provides a preparation method of chlorpyrifos, and relates to the field of chemical synthesis, and the preparation method comprises the following steps: adding 3, 5, 6-trichloropyridine-2-sodium alkoxide, a composite catalyst and distilled water into a reactor; after uniformly stirring, adding 0, 0-diethyl thiophosphoryl chloride to obtain a reaction solution, and adding ammonia water; raising the temperature to 45-55 DEG C, after the reaction is finished, transferring the reaction liquid to a suction filtration device for suction filtration, and separating out a filter cake containing a chlorpyrifos crude product and a mother solution; and washing the filter cake with water, and drying to obtain a chlorpyrifos active compound finished product. According to the preparation method disclosed by the invention, 0, 0-diethyl thiophosphoryl chloride and ammonia water are added at one time, so that the exposure risk of toxic substances is reduced; water is used as a solvent, ammonia water is used as an acid-binding agent, and the problems of organic solvent pollution and strong alkaline wastewater treatment are solved; by controlling the alkalescence environment and reaction conditions, side reaction is inhibited, and the yield and purity of the product both reach 99% or above.

The invention provides a core-shell hydrogel microbead sensing platform as well as a preparation method and application thereof, and belongs to the technical field of synthetic biology and environmental monitoring. The invention provides an engineering sensing microorganism. The engineering sensing microorganism comprises a recombinant vector, the recombinant vector contains a gene expression cassette with target substance response, transformation and report functions; the gene expression cassette comprises a coding gene of a transcription factor ChpR, a coding gene of a fluorescent reporter protein GFP and a coding gene of a chlorpyrifos degrading enzyme, and the gene expression cassette is assembled into a sensing gene line and then introduced into microorganisms to construct the whole-cell biosensor for detecting chlorpyrifos and a metabolite 3, 5, 6-trichloro-2-pyridinol thereof. According to the invention, the chlorpyrifos degradation conversion module is assembled and optimized, and the performance of the sensor is obviously improved. The core-shell hydrogel microbead prepared by the invention can ensure the biological safety and improve the stability of a sensor, and is suitable for high-sensitivity detection of trace chlorpyrifos residues in fruits, vegetables and environmental samples.

The invention relates to a method for detecting pesticide based on a ferriporphyrin modified covalent organic framework nano-enzyme sensing array. According to the invention, ferriporphyrin molecules are loaded on a porous and ordered COFs skeleton, so that excellent peroxidase simulated catalytic activity is realized, H2O2 can be catalyzed to be decomposed to generate reactive oxygen free radicals, and TMB, OPD and ABTS chromogenic reactions are catalyzed. Based on the performance, a three-channel colorimetric sensing array is constructed to detect and distinguish various pesticides such as malathion, profenofos, chlorpyrifos, acephate and dimethoate, and the detection limit is as low as 0.341 nM. After different pesticides are adsorbed to active sites, catalytic reaction can be remarkably inhibited, and specific colorimetric fingerprint signals are generated. Colorimetric data is further combined with a machine learning algorithm, high-accuracy classification and recognition of single pesticides and mixtures thereof are achieved by means of a multilayer sensor, a support vector machine, a random forest and other models, the classification accuracy of an MLP model reaches 90%, ROC curve AUC exceeds 0.97, and the reliability of the detection method is proved.

This invention provides a peach asexual fruit-setting agent and a method for peach asexual fruit setting, belonging to the field of fruit tree cultivation technology. The peach fruit-setting agent is composed of gibberellin GA. 4+7 This fruit-setting agent is formulated with chlorpyrifos, naphthaleneacetic acid, and water, with a mass ratio of 80-150:6-12:4-8. Spraying this agent onto the peach tree canopy during peak flowering enables asexual fruit setting. It is suitable for peach non-dormant off-season cultivation, open-field pollen-free peach varieties, and peach cultivation scenarios without natural insect pollination under greenhouse conditions. Through the scientific formulation and synergistic effect of these three plant growth regulators, it effectively solves the problem of low pollen viability and poor natural fruit setting rate caused by high temperatures during the flowering period in non-dormant peach cultivation, reducing the reliance on artificial pollination in conventional greenhouse peach cultivation and significantly lowering labor costs. Practical application has verified that this invention exhibits excellent fruit setting rate, is easy to operate, and has high safety, effectively improving the overall benefits of the peach planting industry and facilitating large-scale promotion and application.

The invention relates to the technical field of environmental pollution treatment, in particular to amino acid magnetic modified biochar immobilized laccase as well as a preparation method and application thereof. Comprising the steps of preparation of magnetic modified biochar, preparation of amino acid modified biochar and preparation of amino acid magnetic modified biochar immobilized laccase. The preparation method comprises the following steps: firstly, preparing magnetic modified biochar (MBC) through a coprecipitation method, then loading an amino functional group on the surface of the MBC, carrying out amino acid modification by utilizing arginine, and immobilizing laccase by utilizing a glutaraldehyde cross-linking agent on the modified biochar, so as to finally obtain the amino acid modified magnetic biochar immobilized laccase. The invention further provides application of the amino acid modified magnetic biochar immobilized laccase to removal of chlorpyrifos (CP) in a water environment and a soil environment, the amino acid modified magnetic biochar immobilized laccase has high adsorption capacity and degradation capacity, can effectively remove CP in a water body and soil, has the benefits of being safe, efficient and free of pollution, and is suitable for industrial production. The method can be widely applied to the pollution remediation field.

This invention discloses a composition for prolonging the flowering period of durian and a method for regulating the flowering period of durian. The composition includes: a first spray agent, consisting of the following components in the indicated weight ratios: 5-20g of cytokinin-like substances; 1-5g of gibberellin-like substances; 10-30g of polyamine-like substances; 5-15g of boron source; 100-300g of energy-regulating components; 1-5g of slow-release carrier and penetration-promoting components; and water to 1000g; and a second spray agent, consisting of the following components in the indicated weight ratios: 20-50g of flowering rhythm-regulating components, which are composed of 5-10g of paclobutrazol, 3-8g of uniconazole, and 0.5-2g of chlorpyrifos; 2-5g of slow-release carrier and penetration-promoting components; and water to 1000g. This invention, through the combined design of the first spray agent (flowering promoter) and the second spray agent (flowering control), transforms the initiation of durian flower buds from a "single trigger" to a "controllable, phased trigger," thereby prolonging the flowering period while maintaining or even improving fruit-setting capacity.

This invention provides a high-efficiency seedless grape cultivation technology. Through systematic innovation in seed pretreatment, compound growth regulator formulation, substrate optimization, and precise cultivation management, it overcomes traditional technological bottlenecks. Seed pretreatment employs a quicklime-distilled water activation method combined with wood ash-milk fermentation and ultrasonic-assisted treatment, significantly improving embryo activity and germination rate. The growth regulator is a golden ratio compound of gibberellin and chlorpyrifos, applied to the flower spikes twice, with sodium tungstate added to prolong efficacy, achieving a seedless rate >95% and a 20%-30% increase in berry weight. The substrate uses a multi-stage formulation system, adjusted to pH 5.0-5.5 after low-temperature sterilization, and incorporates 5% biochar to enhance water retention and pollution resistance. Innovative cultivation management includes optimized H-shaped trellis system combined with rain-sheltered cultivation and precise water and fertilizer management, resulting in a stable yield of over 1500 kg / mu, extended shelf life to 15 days, and a cultivation cycle shortened to 2 years before fruiting. This technology comprehensively improves fruit quality and planting efficiency, demonstrating significant application value.

The present application relates to a controllable multi-enzyme cascade AChE-HRP-CHO@HNF composite material preparation and plant wearable sensor application, belong to biosensing, enzyme immobilization material and plant in-situ rapid detection field. The composite material is prepared by biomimetic mineralization and layer-by-layer protein crown assembly, takes enzyme-inorganic hybrid nanoflower as carrier, realizes spatial ordered fixation of choline oxidase (CHO), horseradish peroxidase (HRP) and acetylcholinesterase (AChE) in nanostructure, and forms hierarchical distribution multi-enzyme cascade system. The structure can shorten the transmission distance of intermediate product in cascade reaction, improve the cascade catalytic efficiency and pesticide inhibition response sensitivity. Further embedding it in double network hydrogel, a hydrogel sensing disc suitable for plant surface attachment can be prepared, the hydrogel sensing disc has good flexibility, surface adaptability and storage stability, can be used for on-site visual detection of organophosphorus pesticides such as chlorpyrifos, has the characteristics of simple operation and non-invasive detection.

The invention discloses an FET (Field Effect Transistor) biosensor based on aptamer functionalized carbon nanotubes as well as a preparation method and application of the FET biosensor, and belongs to the technical field of pesticide residue detection. The FET biosensor comprises a chip provided with a conducting channel and an aptamer recognition layer constructed on the chip, according to the chip, a semiconductor single-walled carbon nanotube film sorted by polycarbazole is used as a conducting channel, and gold nanoparticles are synthesized on the surface of the channel in situ; the aptamer recognition layer contains a specific aptamer and is fixed with the nano-gold particles through a gold-sulfur bond. Meanwhile, the invention also provides a preparation method of the FET biosensor. The detection limits of the sensor to chlorpyrifos, isocarbophos and omethoate in a phosphate buffer solution respectively reach 0.51 fM, 0.47 fM and 0.21 fM, the linear detection range is 1 * 10 < M > to 1 * 10 < M >, the adding standard recovery rate is 86-105%, and the variation between the sensors is less than 5%. Specific experiments show that the sensor has no obvious response to non-organophosphorus pesticides.

The invention discloses an aggregation-induced emission-metal-organic framework probe which is prepared by taking manganese chloride tetrahydrate as a metal center and 1, 1, 2, 2-tetra (4-carboxybenzene) ethylene as an organic ligand through a one-pot solvothermal method. The invention discloses a method for detecting chlorpyrifos based on a fluorescence sensing system constructed by the aggregation-induced emission-metal-organic framework probe. The aggregation-induced emission-metal-organic framework probe disclosed by the invention has a low-fluorescence background, background signal interference during detection of chlorpyrifos can be reduced, and the sensitivity is improved. Meanwhile, enzyme mediation is introduced to serve as a controllable recognition element, specific and sensitive detection of chlorpyrifos is achieved, and the detection limit is 3.79 ng mL <-1 >. The aggregation-induced emission-metal-organic framework probe disclosed by the invention shows the advantages of high sensitivity, high selectivity, quick response, stability, simplicity and convenience in operation and the like in chlorpyrifos detection, and has a wide application prospect.

The invention relates to a production device for benazolin synthesis, and relates to the technical field of benazolin production, the production device comprises a reaction kettle, a driving mechanism and at least one stirring mechanism, the driving mechanism is arranged on the reaction kettle; the at least one stirring mechanism comprises a basic part, at least one group of stirring teeth, a power assembly and a stirring assembly, the basic part is rotationally arranged in the reaction kettle, and the driving mechanism drives the basic part to rotate; the at least one group of stirring teeth is arranged on the basic part; the other end of the power assembly is in contact with the inner wall of the reaction kettle; the stirring assembly is rotationally arranged on the basic part; under the condition that the basic part rotates, the inner wall of the reaction kettle provides friction force for the power assembly, so that the power assembly drives the stirring assembly to rotate to stir a mixture around the stirring teeth, and corrosive substances in the mixture are not easily attached to the stirring teeth. The benazolin production method has the effect of reducing the benazolin production cost.

The invention provides a corn field multi-element compound water dispersible granule and a preparation method thereof, the corn field multi-element compound water dispersible granule is a water dispersible granule prepared by compounding aminopyridine salt, mesotrione and nicosulfuron salt, the control effect is good, the physical and chemical properties are stable, the corn field multi-element compound water dispersible granule is not easy to decompose and deteriorate to generate phytotoxicity, and the suspension rate reaches more than 96%; in the use process, the water dispersible granule only needs to be dispersed once, the use process is simple, and the water dispersible granule is a granular solid, is good in flowability, does not stick to the wall after being poured, and does not remain in a packaging container to form secondary pollution.

The invention relates to a composition for increasing wheat grain weight, a growth regulator, a preparation method and application, and the growth regulator contains the composition with the active ingredients of chlorfenuron, 2, 4-epibrassinolide and an amino acid water-soluble fertilizer. According to the growth regulator for increasing the grain weight of the wheat, provided by the invention, the chlorfenuron, the 2, 4-epibrassinolide and the amino acid water-soluble fertilizer can be specifically combined and proportioned, so that the drought resistance and the photosynthetic efficiency of the wheat in the grain filling period are improved based on a synergistic effect, and grain filling is promoted; in addition, the thousand seed weight and the grain number per spike are remarkably increased, and the grain yield is stabilized; meanwhile, the preparation method has the advantages of safety, non-toxicity, high efficiency and environmental protection, is simple and easy to operate and is convenient for agricultural popularization and application.

The application discloses an insecticidal aerosol, which comprises the following components in percentage by weight: 0.1%-2% of component A, 0.1%-5% of component B, 1%-70% of component C, and 23%-98.8% of component D; the component A is a compound shown in formula I; the component B is any one of chlorpyrifos, cis-cypermethrin, high-efficiency cypermethrin, phenothrin, transfluthrin, tefluthrin, cyfluthrin, d-cis-trans-chloropropyl acrylonitrile, teflubenzuron and methoxychlor, or a mixture of two or more thereof in any ratio; the component C is a solvent; and the component D is a propellant; the insecticidal aerosol can control the sprayed liquid amount to be 0.05ml-1ml through a special nozzle device, can quickly diffuse in space, and has the advantages of fast knockdown speed and high mortality rate on mosquitoes, flies and other pests.