87 results about "Chemical research" patented technology

The invention discloses a multiaxis differential spectrum absorbing method and device for vertically distribution detection of atmospheric components. Wherein, a plurality of telescopes are arranged to observe the space from the ground in different angles of pitch, so as to detect and collect sun lights scattered by the atmosphere; the surfaces of the telescopes' lens cones are blackened to reduce stray light, the scattered sun light is converged at the ends of optic fibers after passing the lens and light filters in the telescopes; the optic fibers at the tail ends of the telescopes are combined and guide the scattered sun lights into the incident slit of an imaging spectrometer, which first disperses the scattered sun lights, and then concentrate them on a photosensitive surface of a face array imaging CCD detector; the spectral signals go through data analysis and treatment after A / D conversion and inputting into a computer. The invention is applicable for chemical research of atmosphere, provides input data and model verification for chemical model of atmosphere; and is applicable for verifying the results of atmospheric components detected by a satellite.

A device used for preparing or collecting gas state hydrocarbon absorbed in rock consists of acidolysis and degassing integrated unit, gas collector, base liquid purification balance system, fluid transport air vent unit and vacuum-pumping unit. It is featured as using acid to decompose carbonate mineral in rock collecting and storing obtained gas state hydrocarbon for carrying out more accurate analysis on geologic sample.

The invention relates to the research field of medicinal chemistry, in particular to a novel scutellarein-6-site derivative (I), as well as a preparation method and an application thereof to medicines for preventing and treating thrombus. Pharmacological test results show that compared with scutellarin and scutellarein, the compound has better function of inhibiting platelet aggregation. The scutellarein-6-site derivative (I) provided by the invention can be used for treating a series of diseases caused by the thrombus, such as myocardial infarction, ischemia injury and so on.

The invention discloses a high-accuracy collector of micro gas and a relative method, belonging to oil gas earth chemical analysis technical field. The device comprises a tube and a needle valve, wherein a gas room of the tube has a gas tube communicated with a cylinder, a below piston of the cylinder is connected with a reciprocal drive device, the cylinder comprises pump liquid while upper part is connected with a separate tube in which a seal steel ball is arranged which top is connected with a gas bottle with a valve, the gas room comprises a vacuum gage, the gas room and the separate tube are arranged with air exhaust tube, the gas tube and the air exhaust tube are arranged with electromagnetic valves. And the method comprises that (1), adding a sample tube, (2), vacuuming and breaking the sample tube, (3), dispersing gas into the cylinder, (4), the piston moves up to press gas into the gas bottle, (5), the piston moves down to disperse gas in the gas room and the cylinder until balance, (6), repeating the steps (4, 5) to transfer gas all into the gas bottle. The invention is used for geological sample analysis in oil gas earth chemical research.

The invention relates to the field of research into pharmaceutical chemistry, and particularly discloses a novel aromatic acid pro-drug with nitrogen monoxide donor, and a preparation method and application thereof in preventing and treating thrombotic diseases. In the invention, natural aromatic acid compounds with strong antithrombotic actions are structurally modified, and the carboxylic acid groups are incorporated with nitrogen monoxide donor to obtain the nitrogen monoxide donor type aromatic acid pro-drug with favorable liposolubility. The aromatic acid pro-drug with nitrogen monoxide donor has favorable solubility, can effectively permeate into the biomembrane lipid bimolecular layer, and can enhance the bioavailability after the human body takes the pro-drug. The pro-drug can be resolved into aromatic acid compounds and release nitrogen monoxide, and the aromatic acid compounds and nitrogen monoxide can cooperate to perform the pharmacological activities of resisting thrombi, resisting platelet aggregation and the like. The aromatic acid pro-drug with nitrogen monoxide donor can be used for preventing and treating thrombotic diseases and cerebral ischemia diseases.

The invention belongs to the field of chemical research of traditional Chinese medicine, in particular to a method for extracting bergenin from traditional Chinese medicine rodgersia podophylla. In the prior art, methanol ultrasonic is used for extracting bergenin, which is not suitable for industrial production; in addition, a method for adopting lime water wastes time. In order to overcome the defects in the prior art, the invention adopts the technical scheme that the method for extracting bergenin from traditional Chinese medicine rodgersia podophylla comprises the following steps: taking traditional Chinese medicine rodgersia podophylla coarse powder as raw material; carrying out reflux extraction on the raw material for 3 times by alcohol of which the amount is 4-6 times of that of the raw material, wherein the first time lasts for 1-3 hours, and the second time and the third time respectively last for 0.5-1.5 hours; collecting extract, precipitating and filtering; recovering filtrate, and condensing to small volume; standing for devitrification; after the devitrificated crystal is dissolved by alcohol-carbinol mixed liquid at the volume ratio of 8:1-8:3, carrying out hot filtering; and after filtering, standing for devitrification. The method has simple technology, low cost, available raw material and high extraction efficiency and is favorable for industrial production.

A spectrometer capable of flash photolysis useful in the study of chemistry is disclosed, the spectrometer comprises a compartment for receiving a chemical sample; a first light source; a collective objective lens for directing light radiation emitted from the first light source through the chemical sample in the compartment; a second light source for directing a short flash pulse of light radiation into the chemical sample in the compartment; and a means for measuring the change in absorption having an input for receiving the light radiation emitted from the chemical sample in the compartment.

An electrochemical cell for electrolytically contacting and electrochemically inspecting surfaces which makes electrolytic contact with the surface through a body utilizing capillary action. The capillary force between surface and body utilizing capillary action prevents the electrolyte from escaping from the cell without the use of a sealing ring. The body utilizing capillary action allows the electrolyte to flow from an open porous container and wet the surface when the electrochemical cell contacts the surface. Escape of material from the open cell is prevented by the capillary action of the container and of the tip when the electrochemical cell is lifted from the surface. The electrochemical cell is independent of the force of gravity and enables measurements to be made on surfaces of any orientation. The electrochemical cell may be used to perform a multiplicity of electrochemical investigations and processes. The electrochemical cell may be moved over the surface continuously, thereby allowing electrochemical investigations or processes to be performed with lateral resolution. Due to the use of a maintenance-free reference electrode, the electrochemical cell may prefabricated commercially in complete form and stored for extended periods of time after closing.

The invention relates to a method for extracting secondary metabolites of insects or arthropods. The method comprises the following steps: immersing powder slag of insects of arthropods by dichloromethane for more than twice, wherein each immersion time is not less than 36 hours, then performing a solid-liquid separation; drying the obtained powder slag and immersing by a methanol aqueous solution for more than twice, wherein each immersion time is not less than 36 hours, then merging and immersing the obtained an alcohol extract and freeze drying to obtain an extract. The insect is selected from Formica aquilonia, Aspongopus chinensis Dallas, cockroach, mole cricket or maggot; the arthropod is selected from scorpion or spider. According to the invention, the obtained extract has different antibacterial degree to G+positive bacteria or G-negative bacteria, and is capable of separating and preparing a compound with bacteriostatic activity, the method for extracting secondary metabolites of insects or arthropods establishes a methodology foundation for chemical research of the insects which has important academic meaning and good application prospect.

A gravity driving-pump of micro-flow control chip system is prepared for using multiple liquid storage pools as liquid storage pool in said pump, connecting fluid flow-rate regulation pipe to needle valve and switch, laying said liquid storage pool with internal diameter of 2-6mm and length of 5-10 times as internal diameter horizontally, using non-hydrophily polymerized material guide tube with internal diameter of 0.1-0.3mm as connection guide tube.

The invention relates to a decocting method of a traditional Chinese medicine prescription, and the traditional Chinese medicine prescription has an existing name of a compound toxin-vanquishing decoction. According to the decocting method of the traditional Chinese medicine prescription, through biological activity, therapeutic efficacy difference, chemical research and correlation analysis of different decoction methods of the compound toxin-vanquishing decoction, change rules of drug effects and chemical composition of different decoction methods are systematically investigated. Through comparison of inter-batch difference of different batches of compound toxin-vanquishing decoction decocted samples, factors causing the difference are summed up, a detection method for correlation between the traditional Chinese medicine decoction process substantial change and the therapeutic effect is established, the judging indices and standards are determined, corresponding operation regulations are established, the scientific connotation of the compound toxin-vanquishing decoction decocting process is clarified, the method for decocting the traditional Chinese medicine preparation is screened, decocting and operation specifications of the traditional Chinese medicine decoction are established, and the stability of the decocting quality of the compound toxin-vanquishing decoction is ensured through control.

The invention relates to a cigarette smoke chromatographic data retention time drifting MWFFT (Moving Windows Fast Fourier Transform) calibration method and belongs to the technical field of tobacco chemical industry and application. A cigarette smoke extractive is a full extractive; the full extractive is subjected to HRMS (High Resolution Mass Spectrometer) analysis; a tobacco product is a cigarette, a cigar, a pipe cut tobacco or a module tobacco leaf which is perfumed or not perfumed. The MWFFT calibration method disclosed by the invention comprises the steps of cross correlation, rapid fourier cross correlation, a moving window strategy, evaluation of calibration mass, and further optimization of an MWFFT speed. Instruments and equipment used by the invention are all purchased from a market. The cigarette smoke chromatographic data retention time drifting MWFFT calibration method disclosed by the invention has the beneficial effects that MWFFT adopts the moving window strategy to replace a subsection strategy, and the defects of leading in flaws by a subsection strategy method and deleting a chromatographic peak point are overcome. A novel application field for a tobacco chemical metrology analyzing technology and an application aspect is explored, and novel method and concept are provided for chemical researches of a cigarette mass spectrum.

The invention relates to polyphenol active compound in aromatic tobacco and preparation method and application thereof, belongs to the field of tobacco chemical research, and more particularly relates to polyphenol active compound obtained by separating aromatic tobacco, and application of the polyphenol active compound to controlling tobacco mosaic virus. Entire tobacco plants are subjected to extraction by 95% methanol, and are subjected to silica column chromatography and coarse segmentation prior to separation by preparative chromatography so as to obtain the polyphenol active compound (I). The polyphenol active compound has the advantages of environmental friendliness, low cost, safety to people and livestock, high tobacco mosaic virus resistance and the like, and can be used as novel plant virus controlling agent for tobacco mosaic virus.

The present invention relates to a microwave chemical reaction device in the chemical research and the chemical field, in particular to a microwave chemical reaction device for research, pilot test and output magnification of microwave chemical reaction under relatively low temperature. The present invention provides a microwave chemical reaction device with integrated refrigeration and microwave radiation, which comprises a microwave radiating cavity, an embedded microwave reactor, a microwave power, a magnetic control pipe and a refrigerating device; the embedded microwave reactor is arranged in the microwave radiating cavity; the microwave radiating cavity is directly connected with the refrigerating device for continuous refrigeration of the microwave radiating cavity; the microwave power and the magnetic control pipe are connected with the microwave radiating cavity. The present invention can provide high-strength and high-intensity microwave radiation and ensures that the reaction system is under the low temperature or superlow temperature condition while greatly increasing the chemical reaction speed, thus providing full reaction activated energy, increasing the reaction speed and overcoming the damages of high temperature on reactants or target molecule structure, activity and shape.

The air purification technology and methods of the disclosure will reduce the levels of airborne biological, chemical, and particulate contamination and thus improve outcomes in, for example, all areas of basic, applied, commercial, industrial, biological, and chemical research and manufacturing, as well as hospital settings, and long-term care facilities, as set forth herein.

This invention relates to one prediction method of high polymer constant temperature crystal dynamic force parameters, which comprises the following steps: a, on Kim S P and Kim S C module base, adopting Monte carlo method and cell automatic machine combination method to deduce polymer analogue computation step; b, according to sample to get intensity and absolute crystal degree Xc, initial crystal linear speed G(0) and number; c, taking parameters in step b into high polymer constant crystal analogue computation to get the dynamic crystal parameters under set temperature; d, using computer program to improve analogue computer to compute efficiency.

The invention relates to a novel middle-temperature carbonyl sulfide hydrolysis method which adopts a measure of placing an antitoxic protective agent on the top of cheap active alumina hydrolysis catalysts to achieve the antitoxic and deoxidation effect and to prevent the poisoning of the hydrolysis catalysts. Trace carbonyl sulfide (COS) in various kinds of chemical raw material gases can be hydrolyzed at a temperature of 150 DEG C to 320 DEG C, the process is simple, and the price of the adopted catalysts can be reduced by more than 50 percent compared with the traditional molybdenum-containing middle-temperature surfer resistance hydrolysis catalysts (EH-2 and EH-3 types produced by Hubei Chemical Research Institute).

The invention specifically relates to a method for manufacturing a solid electrode, belonging to a method for manufacturing a special device for an electrochemistry research. The method of the invention comprises the following steps: firstly connecting an electrode material with a lead by a proper method to form a loop, and using an artificial denture resin material (self-solidifying materials orthermoset materials) to cover as an electrode coat, directly using a mould to control the shape of the electrode or obtaining the needed electrode shape by processing after solidifying the resin, finally using a series of metallographic abrasive paper to polish one end of the electrode material until exposing the surface of the electrode material, and obtaining the needed electrode. The method issimple and rapid with low cost and can be used for manufacturing various solid electrodes; and the biological compatibility of the manufactured electrode is good.

The invention discloses a transgenic rice Bt63 detection kit and a detection method thereof, relating to transgenic rice. The kit comprises a loop mediated isothermal amplification reaction liquid A, a loop mediated isothermal amplification reaction liquid B, a Bst DNA (Deoxyribose Nucleic Acid) polymerase C and a color developing agent D. The method comprises the following steps of: extracting template DNA; performing loop mediated isothermal amplification; and performing color developing detection. Four specially-designed primers and the Bst DNA polymerase with strand displacement activity are used for specially, efficiently and rapidly amplifying DNA under a constant-temperature condition, so that 109 target sequence coping can be realized within one hour. The amplification effect can be observed through a fluorescent dye. A rapid loop mediated isothermal amplification method with high specificity and low cost is used for detecting Bt63 transgenic rice, and can be used for replacing a CRL (Chemical Research Laboratory) method confirmed by the Joint Research Center, and novel scientific bases are provided for food safety supervision.

A reasoning system with a reasoning engine that uses a rule set created from a rule representation language that has an English / natural language-like rule syntax and format is discussed. The reasoning system employs a real-time selection algorithm that chooses the rules used to analyze complex data (e.g.: bio-medical research, e-commerce, Customer Relationship Management (CRM), environmental research & engineering, bio-chemical research and product development, Investment and money management, anything related to research and product development) without suffering exponential performance decreases as the complexity of the analysis increases. The use of the rule representation language enables different domain users to review, create and modify rules without requiring the users to possess an advanced knowledge of programming languages.

A sample box for scanning electron microscope testing and a testing method by the utilization of the sample box belong to the field of materials chemical research tools. Problems of sample boxes of existing scanning electron microscopes are solved. The sample box for scanning electron microscope testing comprises a box body, a box cover, a seal ring, a connecting shaft, a cover opening torsional spring and a unidirectional bleeder valve. The box body is made of a conductive metal material, such as stainless steel, aluminium alloy and the like. The box cover is arranged at the opening of the box body. The seal ring is disposed between the box body and the box cover. The box body and the box cover are rotatably connected through the connecting shaft along the opening direction. The connecting shaft is provided with the cover opening torsional spring such that the box cover is in an open state under natural conditions. The box body is provided with the unidirectional bleeder valve for pumping gas out of the box. The sample box is used for testing samples which are sensitive to air and moisture.

The present invention provides luminescent metal ion complexes for use in a wide range of biological and chemical studies. The luminescent metal ion complexes of the invention comprise a metal ion chelating component covalently bound to a carrier molecule. Also provided are methods of making and using the luminescent metal ion complexes.

The invention relates to a synthetic method of 3-methylene isoindolone compounds. The synthetic method comprises the following step: in a reaction solvent, under argon shield, carrying out reaction under the catalytic action of a Pd compound to obtain the 3-methylene isoindolone compounds by taking benzamide compounds and anhydride or carboxylic acid compounds. The raw materials used in the method provided by the invention are simple and easily available and are industrial commodities which are wide in source, low in price, stable in property and unharsh in storage condition. In addition, the synthetic method is short in route, and the 3-methylene isoindolone compounds are constructed in one step by virtue of C-H bond activation and C-N bond formation. The synthetic method is high in atom economy and excellent in efficiency, and the reaction yield reaches 99%, so that the breakthrough of chemical synthesis of the system is realized, and deep extension of chemical researches of related drugs in the system is promoted.

The invention discloses a digitalized chemical research experiment system. In an experiment, a chemical experiment specialized digital collector is used and accesses a computer through an automatic monitoring sensor (corresponding sensors are adopted for different experiments). Software in the computer has a plurality of data display modes (datasheet, pattern, scaleplate, etc.) and a plurality of experiment data analyzing tools (linear fitting, curve fitting, integrating, etc). The software automatically identifies the sensor and generates data and an experiment text of a file. Furthermore the software can realize experiment process repeating and uses a playback function for analyzing the experiment data, so that a student performs digital research on various experiments in a textbook. Furthermore the digitalized chemical research experiment system arouses a researching ambition of the student through accurate measurement for various kinds of data.

The invention discloses a blended raschel blanket and a production method thereof. The blended raschel blanket is characterized in that 100D-150D polyester filaments is used as a base fabric and blended yarns of 36s / 2mulberry silks and combed cotton are used as blanket cashmere yarns, wherein the base fabric accounts for 15%-22% by mass of the blanket, the blended yarns account for 78-85% by mass of the blanket, and the blending ratio of the mulberry silks to the combed cottons is 10%-30%:90%-70%. The production method is characterized in that a special one-step bleaching pretreatment technology is adopted, a neutral active dye is adopted in printing and dyeing processes, as a special hydrophilic softening agent produced by Ningbo Chemical Research Institute Co., Ltd is used; compared with the conventional raschel cotton blanket, the product is obviously increased in handfeel and comfortable performance, in addition, technological processes are reduced, water and gas are saved, the sewage discharge is reduced, the top noil ratio is reduced, and the rate of finished products is high.

The invention discloses a filling and sealing technique for a stranded elastic contact pin micro-rectangular electric connector. The filling and sealing technique for the stranded elastic contact pin micro-rectangular electric connector comprises the following steps: (1) preparation of adhesives, namely selecting a DG-3S adhesive A and an S adhesive B of the Zhonglan Chenguang chemical research design Co., LTD, and preparing the adhesive A and the S adhesive B at the mass ratio of (1.5-2) to 1, continuously stirring the adhesive A and the S adhesive B for 1-2 minutes until the adhesives are evenly mixed and are consistent in color; and (2) fixed filling and sealing of an insulator, namely enclosing the insulator into a shell until being assembled in place. According to the filling and sealing technique for the stranded elastic contact pin micro-rectangular electric connector, the problem that the sealing property of the micro-rectangular electric connector is affected by the disadvantages that rubber part sealing and glass sintering sealing methods are complicated in process, high in cost, not beneficial to sealing of miniaturized products, poor in dielectrics voltage-resistance, poor in air-tightness and the like is solved.

The invention discloses a vehicle-mounted target spectral remote-sensing device and method for the range resolution of pollutant gas. The device comprises a light guiding system, a monochrometer, a CCD (Charge Coupled Device) detector and a computer, wherein the light guiding system is driven by a stepping motor and an azimuth adjustment motor and provided with a spyglass which is parallelly collimated with the light guiding system. By using the method and device disclosed by the invention, the rapid and multi-component remote-sensing on the horizontal and vertical distribution situations of lower pollutant gas can be realized on a vehicle movable platform based on range resolution. The device and method disclosed by the invention can be applied to atmospheric chemical research, and provide input data for atmospheric chemical models.

The invention discloses a high-temperature gas-cooled reactor secondary circuit dynamic hydrochemistry corrosion and electrochemistry research electrode system and a testing method. The system comprises a testing cavity, wherein an inlet and an outlet of the testing cavity are connected with communicated high-temperature and high-pressure medium pipelines in a welding manner; testing electrodes are embedded into cylindrical electrode sealing sleeves in an interference fit manner; the electrode sealing sleeves are embedded into holes in a gland; guide posts are coated by PTFE heat-shrinkable bushes, penetrate through the holes in the gland, and are electrically connected with the testing electrodes by screw threads; compressing sealing elements penetrate into the holes in the gland; the guide posts penetrate through inner holes of the compressing sealing elements; the compressing sealing elements are connected with the electrode sealing sleeves by screw threads; compressing nuts are connected with compressing bolts on an outer wall of the gland by screw threads; and sealing between a medium in the testing cavity and the gland and between the medium and the guide posts is tested by extruding the compressing sealing elements. An electrochemical testing method is determined according to forms of the electrodes; a device can simulate a 90-degree medium impact environment; and corrosion electrochemistry research can be performed in a simulation environment.

The invention relates to a determination method of correlation between functions of natural essence and flavor used in cigarettes and volatile components and belongs to the technical field of tobacco chemical industry and applications. In the determination method provided by the invention, the classification of volatile chemical components and the statistical analysis of regression coefficients are introduced. The method comprises the steps of: positioning of functional properties of the natural essence and flavor used in the cigarettes, detection of the volatile components and component classification, and research on the correlation between the functions and the components. Instruments and equipment used in the determination method are all purchased from the market, and the determination method has the beneficial effects that through the combination of the smoking positioning with the detection and the classification of the volatile components, a regression curve is built through a regress function of an MATLAB (Matrix Laboratory), and the functional properties of the unknown natural essence and flavor used in the cigarettes are determined through mathematical calculation so as to open up a new application field for the tobacco chemistry and application technologies, and provide a new method and train of thought for the chemical research of aa cigarette mass spectrometry.