20results about How to "Improve experiment safety" patented technology

The invention relates to the technical field of battery thermal performance measurement, in particular to a method for measuring the specific heat capacity of an energy storage battery. The theoretical model is calibrated by monitoring the cooling curve of the battery so as to ensure that the heat transfer characteristic of the battery is accurately reflected. Then, constant-power heating is adopted, so that the thermal field of the battery reaches a quasi-steady state, and in the steady state, the temperature change is gradually consistent; and recording a temperature change curve in real time through a temperature acquisition instrument, and calculating the specific heat capacity of the battery in combination with the calibrated model and a constant power input condition. According to the method, only the voltage-stabilized power supply and the temperature acquisition instrument are needed, so that the cost is greatly reduced; the measurement precision is improved through temperature change curve analysis after model calibration, and the problems that in a traditional method, environmental interference is large, and precision is insufficient are solved; the time for reaching the quasi-steady state is shortened through constant-power heating, and the measurement process is accelerated. The method is suitable for various energy storage batteries, can meet the requirements of industries such as electric automobiles and electric energy storage on the thermal performance of the batteries, and has wide popularization value.

A multifunctional lithium battery thermodynamic experiment device comprises a battery cell pressure container with a closed internal space. A battery weighing table, an electrolyte weighing table, a battery placing frame and a needling mechanism are arranged in the pressure container, the battery placing frame is arranged on the battery weighing table and is provided with a battery placing area capable of placing a plurality of battery cells to be detected, and the battery placing area is provided with a battery cell heating piece; a quartz glass groove arranged on the electrolyte weighing table is arranged below the battery placing area; the needling mechanism is arranged on the side surface of the battery placing rack; the needling mechanism comprises a hydraulic prop, a connecting rod and a needling head, the needling head faces the battery placing area and is connected with the output end of the hydraulic prop through the connecting rod, and a temperature thermocouple is arranged in the needling head. The experimental device provided by the utility model has the advantages of multiple purposes, flexible functions, diversified assembly, wide application range, reasonable structural design, compact spatial arrangement and simple test method operation.

The invention provides a preparation method of urea type HATU, which comprises the following steps: step S1, carrying out reaction on N-hydroxy-7-aza-benzotriazole and inorganic alkali to obtain N-hydroxy-7-aza-benzotriazole salt; and step S2, enabling the N-hydroxy-7-aza-benzotriazole salt to react with tetramethyl chlorourea hexafluorophosphate, so as to generate the urea type HATU. The preparation method disclosed by the embodiment of the invention is simple in process, easy to operate, low in synthesis cost, high in experimental safety, easy in condition control and suitable for industrial production.

The utility model provides an operation smoke collecting device under a simulated operation microenvironment, which comprises a box body, a lifting support arranged on the box body, a group of rotor flow meters arranged on the lifting support, a group of detection pipeline components arranged on the box body in a penetrating manner, one end of each detection pipeline component is communicated with the corresponding rotor flow meter, and the other end of each detection pipeline component is positioned in the box body. And the box body is also provided with an air inlet hole and an electrotome wire inlet hole. The smoke collection micro experimental environment under the simulated surgical operation is provided, the functions are convenient and fast to use, the production efficiency is improved, the environmental pollution is reduced, and the experimental safety is improved. The particulate matter monitoring module and the compound collecting module provided by the device can effectively meet the detection requirement of the operation smoke in the microenvironment.

The utility model discloses a multifunctional nucleic acid detection, extraction and amplification instrument which comprises a shell, a nucleic acid extraction and amplification detection structure, a heating structure and a detection and calibration structure, and the nucleic acid extraction and amplification detection structure is attached to the upper portion of the heating structure. The detection calibration structure is mounted above the nucleic acid extraction amplification detection structure, two groups of cooling fans are respectively mounted on two sides of the heating structure, the heating structure comprises a heating machine shell, a plurality of groups of heating mechanisms and a heating outer cover, the plurality of groups of heating mechanisms are mounted in the heating machine shell at intervals, the heating outer cover is mounted above the heating machine shell, and the heating outer cover is mounted above the heating machine shell. And each group of heating mechanism comprises a ceramic heating sheet, a graphite heat-conducting sheet and a heating block which are sequentially mounted from bottom to top. The nucleic acid detection, extraction and amplification instrument provided by the utility model can be used for carrying out nucleic acid extraction on a sample solution, providing a proper temperature for a sample nucleic acid amplification reaction, assisting in heat dissipation of a heating structure and improving the experiment safety.

The invention discloses a thyroid nodule puncture sample DNA and RNA extraction method and a kit, and relates to the technical field of biology. The kit comprises a lysis solution and a nucleic acid protective agent, the lysate is prepared from guanidine hydrochloride, guanidine isothiocyanate, sodium citrate, lauryl sodium sulfate, ethylenediamine tetraacetic acid, Nonet P-40, polyvinylpyrrolidone, Triton X-100 and tris (hydroxymethyl) aminomethane; the nucleic acid protective agent is composed of dithiothreitol and tris (2-carboxyethyl) phosphine. According to the kit provided by the invention, the extraction efficiency is improved, and the flexibility of sample treatment is improved by optimizing the components of the lysis solution, increasing the lysis efficiency of different tissue quantities, jointly using the nucleic acid protective agent and inhibiting the nuclease activity in a sample, so that the individual detection requirements of more patients can be met. Through the application of the nucleic acid protective agent, the operation steps are simplified, and the safety is enhanced.

The invention provides a virtual experiment method, system and device and a storage medium. The method comprises the steps that independent suspension areas are generated in a display picture of a visual enhancement device according to chemical reagent information of a preset experiment; identifying a current image collected by the vision enhancement equipment in real time to obtain a local image of each vessel in the current image; pairing the vessel with the independent suspension area, generating a chemical reagent posture image at least based on the corresponding multimedia content of the chemical reagent information, and superposing the chemical reagent posture image to a local image of the corresponding vessel; when it is detected that the chemical reagent posture images corresponding to the at least two kinds of chemical reagent information are overlapped, chemical reagent posture images are generated according to the multimedia content corresponding to the preset reacted chemical reagent information, and the chemical reagent posture images are overlapped to local images of the corresponding vessels. The operation steps of the whole experiment process can be simulated, the corresponding visual effect is fed back, contact with chemical reagents is avoided, and safety is improved.

The invention relates to the field of preparation of poultry vaccines, in particular to a triple vaccine for avian yellow glands and a preparation method thereof, and the triple vaccine for avian yellow glands comprises 90-95 parts of mineral oil; 5 to 20 parts of a surfactant; 2-8 parts of a complexing agent; 1-10 parts of a divalent inorganic salt; 30-50 parts of a first virus liquid containing inactivated avian influenza virus; 30-40 parts of a second virus liquid containing inactivated fowl adenovirus; 40-60 parts of a third virus liquid containing inactivated chicken flavivirus; 5 to 10 parts of span-80; 5 to 10 parts of tween-80; and 1-3 parts of aluminum stearate. The vaccine prepared by the invention does not generate any adverse reaction on chickens, is high in experimental safety, and can induce high-level neutralizing antibodies in immunized chickens, which indicates that the immunized chickens can effectively resist virus attacks of chicken flavivirus, avian influenza and fowl adenovirus.

The present application relates to the field of oil and gas drilling development, in particular to a kind of high temperature and high pressure wellbore multiphase flow visualization device and method based on MIT imaging.The technical scheme is: including temperature and pressure monitoring unit, data processing and three-dimensional imaging unit, also including wellbore simulation unit and MIT magnetic induction imaging unit, MIT magnetic induction imaging unit is installed on wellbore simulation unit;Silicon carbide wellbore is filled with three-phase experimental fluid, for adapting the simulation needs of different well diameters, and silicon carbide wellbore is installed in the center of first center variable-diameter mechanism, second center variable-diameter mechanism and third center variable-diameter mechanism;Composite heat insulation layer is arranged outside silicon carbide wellbore, and the beneficial effect is: the present application can adapt to high temperature and high pressure working condition, magnetic signal has strong anti-interference ability, the monitoring of three-phase experimental fluid is realized by the combination of the rapid adjustment of center variable-diameter mechanism and magnetic induction fault imaging technology, and it has high imaging resolution, which is of great significance to promote the progress of deep oil and gas drilling development technology.

The present invention discloses a laboratory engineering method, system, equipment and medium for contact-free virus experiments, which include: obtaining experiment reservation information; obtaining the highest experiment level according to the experiment reservation information; obtaining portrait information; obtaining a preset experimenter level according to the portrait information; comparing the experimenter level with the highest experiment level, recording the experimenter whose experimenter level is lower than the highest experiment level into the monitoring object list; recording the experimenter whose experimenter level is equal to or higher than the highest experiment level into the white list; obtaining indoor image information in the laboratory; obtaining the confidential workstation information of the experimenter in the white list according to the indoor image information; monitoring the experimenter in the monitoring object list according to the indoor image information, and obtaining the distance information between the experimenter in the monitoring object list and the confidential workstation information; if the distance information is less than the safe distance, generating the first prompt information. The present invention has the effect of improving the experimental safety of contact-free virus experiments.

The utility model discloses a gas explosion limit measuring device capable of being heated and pressurized, which comprises an equipment shell, a support plate is arranged in the equipment shell, and a gas mixing component for fully mixing gas and an explosion reaction component communicated with an inner cavity of the gas mixing component are arranged on the support plate; through the arrangement of the gas mixing assembly for fully mixing gas and the explosion reaction assembly communicated with the inner cavity of the gas mixing assembly, when combustible gas and air enter the mixing chamber, gas with different components can be contacted and mixed under the action of the flow guide blades, so that the combustion effect of the combustible gas and the air is improved. Meanwhile, the gas can be mixed again through the spiral flow guide pipe, accidental explosion caused by too high local concentration can be avoided, the experiment safety is improved, meanwhile, the fully mixed gas can enable explosion test equipment to exert the maximum efficiency, potential risks in the actual use environment are accurately simulated, and the safety of the experiment is improved. Therefore, reliable data support is provided for product design and production process improvement.

The utility model discloses an immunohistochemical experiment slide device, which belongs to the technical field of medical detection and comprises a taking plate, a groove is arranged at the top of the taking plate, label paper is attached to the inside of the groove, a clamping groove is arranged at the bottom of one side of the taking plate, a comparison plate is fixed on the other side of the taking plate, and the label paper is attached to the inside of the clamping groove. A sealing groove is formed in the side, close to the taking plate, of the comparison plate, a sealing plate is movably connected to the top of the taking plate, a clamping strip is fixed to the bottom of the end, close to the clamping groove, of the sealing plate, and a sealing strip matched with the sealing groove in size is fixed to the side, close to the sealing groove, of the sealing plate. According to the utility model, through the cooperative use of the taking plate, the groove, the label paper, the clamping groove, the comparison plate, the sealing groove, the sealing plate, the clamping strip, the sealing strip, the pressing sheet and the detection sheet, the label content on the slide can be replaced, the label can be better protected, the definition of the label content is prevented from being influenced by pinching abrasion, and thus the accuracy of experimental detection is improved.

The utility model discloses a workbench for a biochemical laboratory. The workbench comprises a base, a storage cabinet arranged at the top of the base, and an experimental platform arranged at the top of the storage cabinet, a side suction part is arranged on the rear side of the experiment platform; a top cabinet is arranged right above the experiment platform, and an air blowing part for blowing air downwards is arranged in the top cabinet; one of the left side and the right side of the top cabinet is connected with the upper portion of the side vertical cabinet, and the bottom of the side vertical cabinet is installed on the top of the base. A teaching demonstration window used for teaching interaction demonstration with students is formed between the top cabinet and the experiment platform, an upper blowing and side air draft structure is adopted, toxic gas is prevented from being inhaled by an experimenter, and the experiment safety is improved.

The invention relates to Brucella WYQ-2, a microbial agent and application of the Brucella WYQ-2. Microorganisms of the Brucella WYQ-2 are classified and named as Brucella sp., the Brucella WYQ-2 is preserved in the China Center for Type Culture Collection, the preservation number is CCTCC No: M 20242175, the preservation date is October 14, 2024, and the preservation number is CCTCC No: M 20242175. Thalli of the Brucella WYQ-2 are in a small point shape, white, light-proof, full in form and free of flagellum; and the moss grows along the lineation. Under the condition that the Brucella WYQ-2 and the microbial inoculum have electron donors, especially when reduced iron powder is used as the electron donors, the Brucella WYQ-2 and the microbial inoculum can break through the chemical barrier that extremely high chemical energy is needed when carbon dioxide is converted into other high-added-value products, and effective fixation of carbon dioxide is achieved. In addition, the reduced iron powder in the immobilization reaction can be used as a microelement to regulate and control the secretion of protein in the microbial growth process.

The invention discloses mesophase pitch prepared through catalysis of metal-free superacid and a preparation method of the mesophase pitch, and belongs to the technical field of high polymer materials. Comprising the following steps: in an inactive atmosphere, contacting metal-free superacid serving as a catalyst with polycyclic aromatic hydrocarbon, carrying out prepolymerization reaction to obtain a prepolymerization system, adding alkali liquor until the prepolymerization system is neutral, washing with water to remove the catalyst and metal ions, distilling to remove small molecules, placing the product in a closed container in the inactive atmosphere, and carrying out vacuum drying to obtain the polycyclic aromatic hydrocarbon. And carrying out a thermal polycondensation reaction to prepare the mesophase pitch. According to the preparation method, the metal-free superacid can be conveniently removed from the system, the subsequent reaction equipment cannot be corroded, the experiment operation requirement is low, the experiment safety is high, the product without the catalyst basically has no metal residue, the method has great advantages in synthesis of high-purity products, and compared with a metal catalysis system, the method has the advantages that the cost is low, and the method is suitable for industrial production. The content of the obtained intermediate phase is higher, the intermediate phase distribution is more uniform, and the intermediate phase is of a wide-area structure.

The application discloses a cyanobacterial nanogene carrier and a preparation method thereof. By irradiating cyanobacteria under appropriate wavelength light, toxic active oxygen is generated in the cyanobacteria, lysosomes are destroyed, and the gene carrier trapped in the lysosomes is released into the cytoplasm, so that the biological function of the gene can be better exerted, and the problems of the gene carrier in the prior art, such as cationic lipids, cationic polymers, difficult lysosome escape and low gene transfection efficiency, are overcome. Meanwhile, the preparation process is complex, other substances are easily introduced, and the safety is low, and the like are overcome, so that the application is more suitable for efficient delivery of the gene carrier, an effective treatment method is provided for treatment of tumors and the like, and the treatment of cancer and the like is beneficial.

The utility model discloses an internal circulation pipe-free ventilation cabinet, and relates to the technical field of ventilation cabinets. Comprising a ventilation cabinet main body, the ventilation cabinet main body is provided with an installation mechanism used for ventilation work, a fan is used for sucking in external gas, then the external gas is filtered and discharged, and the direction is controlled through a guide plate when the gas is discharged; then a gear rod slides on the inner wall of a limiting plate through pushing of a connecting block and an electric push rod, the gear rod drives a transmission gear to rotate, and a supporting shaft on the transmission gear rotates, so that the angle of a guide plate on the outer wall of the supporting shaft is adjusted, the gas exhaust direction is controlled, and the gas exhaust direction can be accurately controlled; the gas is prevented from being directly blown to experimenters or sensitive equipment, the experiment safety is improved, the angle of the guide plate is flexibly adjusted, the gas exhaust direction can be dynamically adjusted according to experiment requirements or environmental conditions, and the applicability of the equipment is improved.

The utility model belongs to the technical field of contamination boxes, and particularly relates to a contamination box capable of measuring gas concentration, which comprises a cabinet body, the cabinet body comprises a base, a frame is mounted at the top of the base, an acrylic plate is mounted on the inner side of the frame, a sealing door is mounted on the front side of the frame in a hinged manner, and a first mounting hole is formed in the acrylic plate at the top of the frame in a penetrating manner; a second mounting hole is formed in the acrylic plate on the side face of the frame in a penetrating mode, an air inlet connector is clamped to the inner side of the first mounting hole, an exhaust connector is clamped to the inner side of the second mounting hole, the bottom of the air inlet connector is connected with a conveying pipe, the bottom of the conveying pipe is connected with a flow dividing cover, and an air outlet plate is fixedly installed at the bottom of the flow dividing cover; according to the device, gas can be uniformly distributed in the cabinet body after entering the cabinet body, the experiment efficiency, the consistency of experiment conditions and the accuracy of experiment results are improved, the concentration of the gas in the cabinet body can be effectively and rapidly detected, and the concentration of the gas in the cabinet body can be monitored in real time.

The invention discloses a method for preparing chlorine dioxide, comprising the following steps: uniformly mixing chlorate solid, formamide and acid to form a reaction liquid, performing an oxidation-reduction reaction at 50-80°C to obtain chlorine dioxide; the molar ratio of formamide to chlorate is 0.1-1.5:1; and the acid concentration in the reaction liquid is 5-8 mol / L. The preparation method of the invention adopts a new reducing agent to prepare high-purity chlorine dioxide, overcoming the technical problems of low purity of chlorine dioxide, low raw material reaction rate, and long reaction time in the traditional technology.

This invention belongs to the fields of mechanical automation and machine vision recognition technology. It discloses a stability heating test system and method for automated test tube extraction and boundary recognition. The system includes a mechanical motion and gripping unit, a heating and temperature control unit, a machine vision recognition unit, and a central control unit. It enables automatic placement and retrieval of test tubes between the placement and heating positions, precise control of the test temperature and over-temperature protection, and automatic recognition of the endpoint of test paper color change based on machine vision. The method achieves intelligent determination and alarm of the color change endpoint through image acquisition and processing, multi-test tube positioning, test paper area extraction, and color similarity analysis based on HSV color space and Mahalanobis distance. This invention solves the problems of low efficiency, large subjective error, and high safety risks in traditional manual operation, realizing full automation, digitalization, and unmanned operation of the stability heating test process, and improving the accuracy and repeatability of test results.