13results about How to "Improve assay efficiency" patented technology

The application discloses a method for determining the content of chromium in a mixture of iron and chromium, and comprises the following steps: S1, oxidizing the divalent iron ions in the mixture of iron and chromium into trivalent iron ions under an acidic condition; S2, adding sodium hydroxide solution and hydrogen peroxide under stirring, so that the trivalent iron ions form iron hydroxide precipitate, and the trivalent chromium ions are oxidized into hexavalent chromium ions; S3, adding an acidic solution, so that the iron hydroxide precipitate is dissolved, and the wrapped trivalent chromium ions are released; adding sodium hydroxide solution and hydrogen peroxide under stirring, so that the trivalent iron ions form iron hydroxide precipitate, and the released trivalent chromium ions are oxidized into hexavalent chromium ions; S4, repeating the step S3 X times; X is an integer greater than 0; and S5, determining the content of chromium in the mixture. The method for determining the content of chromium in the mixture of iron and chromium has the advantages of accurate measurement, high precision, simple operation and improved efficiency of the determination of the content of chromium.

The utility model discloses a kind of visual calibration device of astigmatism eye focal line, comprising: axial position scale board, board face is printed with E-type visual target for distant visual detection;Cross visual target disc, coaxially rotatably embedded in through-hole;Several groups of pinholes, each group is arranged along visual target line two sides straight line, pinhole center connecting line is parallel with corresponding visual target line;Fixed shaft is through cross visual target disc center, and is mechanically connected with transmission device;LED light source, set in axial position scale board back surface.The utility model has beneficial effect: the utility model can provide clear and visible and invariable measured astigmatism eye objective existence astigmatism focal line of the person being examined, and can accurately determine the clear criterion that cross visual target line coincides with the focal line, so as to maximumly improve the accuracy of astigmatism eye astigmatism axial calibration, reduce the deviation of calibration astigmatism axial direction and actual astigmatism axial direction, improve determination accuracy and determination work efficiency.

The present application relates to the technical field of plant science, and particularly relates to a device and method for measuring the anatomical structure of plant fine roots without thin sectioning. By directly staining, stably positioning and microscopically observing the cross section of fine roots, clear and complete anatomical images of the cross section of fine roots can be obtained without dehydration, embedding and ultrathin sectioning, and reliable measurement of anatomical parameters can be realized. The steps of fixing, dehydrating, embedding and ultrathin sectioning are omitted, the sample preparation process is significantly simplified, the time from processing to imaging is shortened, the overall measurement efficiency is improved, and the device is suitable for multi-sample and batch analysis scenarios. Under the premise of ensuring the reliability of the identifiable and measurable anatomical structure, the process is simplified, the efficiency is improved and the cost is reduced, and the device has good technical value and application prospect.

This invention relates to the field of environmental monitoring technology, specifically a mobile chlorophyll extraction and acidification magnesium removal device and its usage method. The device includes a movable housing made of aluminum composite material, providing light-shielding properties. A horizontal rotating shaft is located at the top, connecting to a light-shielding cover plate, allowing the cover plate to open and close 180° above the movable housing. The light-shielding cover plate is equipped with an automatic opening mechanism. This mechanism includes a first sliding motor module installed near the bottom of the light-shielding cover plate, connected to the sliding cover plate. The sliding cover plate has a semi-open J-shaped structure, with its end bend located at the bottom of the light-shielding cover plate, and is equipped with an angled opening device. This invention enables chlorophyll extraction, acidification magnesium removal, and rapid measurement, improving the efficiency and accuracy of chlorophyll index detection in eutrophication water bodies.

The utility model relates to cement detection technical field. A kind of cement specific surface area detection device, different orientation of workbench is different working position, and working position includes test sample cylinder assembly position, cement weighing position, cement compaction position and determination position, and the determination box corresponding with determination position is equipped in the middle part of workbench, and determination device is equipped in determination box, and regulating and control device for ensuring that determination environment is stable is further equipped in determination box.The utility model provides a kind of cement specific surface area detection device, which can avoid the influence of external environment on test accuracy, ensure test result accuracy, effectively increase determination efficiency, can satisfy higher detection demand;Solve the technical problems in the prior art, the current cement specific surface area determination mode is relatively single, the detection efficiency is low, and the test result is susceptible to environmental influence, and cannot satisfy higher detection demand.

The utility model discloses a tablet hardness measuring device for medicine research and development, which comprises a base, the top of the base is fixedly communicated with two pairs of vertical plates, the two pairs of vertical plates are jointly and fixedly connected with a top plate, a tablet tube fixedly connected with the top plate is arranged on the top plate in a penetrating manner, a plurality of tablet bodies are stacked in the tablet tube, and the tablet bodies are fixedly connected with the top plate. An electric telescopic rod is fixedly connected to the bottom of the top plate, a hardness measuring block is fixedly connected to the bottom of the electric telescopic rod, a motor is fixedly connected to the rear end of the vertical plate on the left rear side, each pair of vertical plates are jointly and rotationally connected with a rotating rod, and the rotating rod on the left side is fixedly connected with the output end of the motor. Tablets can be conveyed through the conveyor belt, so that the measuring efficiency is improved; and a brush roller drives a brush to rotate, so that the conveying belt can be cleaned, residual tablet chippings are cleaned, cleanliness of the surface of the conveying belt is guaranteed, follow-up tablets are stably placed, and the follow-up tablet detection effect is good.

The invention relates to the technical field of electrochemical energy storage system thermal management, and provides an energy storage battery entropy coefficient determination method, which comprises: constructing a finite element model in COMSOL simulation software; carrying out a round of complete battery constant-current charging and discharging experiment on the target battery, and recording related data of the experiment; based on the finite element model, fitting a battery cell thermal conductivity coefficient, a large-surface convection heat transfer coefficient, a bottom-surface convection heat transfer coefficient, battery cell heat, positive tab heat and negative tab heat in sequence, and updating parameters of the finite element model until the number of iterations reaches a preset upper limit; and calculating an entropy coefficient in combination with experimental data. By means of the method, the efficiency and precision of entropy coefficient measurement of the high-capacity energy storage battery can be improved with low cost.

This invention provides a rapid measurement device and method for gas pressure in high-moisture coal seams, relating to the field of coal seam gas pressure measurement. The device includes: a pressure measurement and sealing unit, a gas-liquid separation unit, a pressure acquisition unit, a gas compression unit, and a drainage unit. The pressure measurement and sealing unit injects liquid and mud into the target sealing area to seal the target sealing area. The gas compression unit compresses air in the non-target sealing area within the borehole, causing the water-containing gas in the borehole to flow towards the drainage unit. The gas-liquid separation unit separates the water-containing gas in the borehole into water and liquid, with the separated liquid discharged through the drainage unit. The pressure of the separated gas is measured by the pressure acquisition unit to obtain the gas pressure within the borehole. The technical solution of this invention overcomes the problems of insufficient accuracy and reliability in pressure measurement caused by the lack of systematic solutions for gas-liquid separation, active pressure maintenance, and moisture content coupling correction in existing technologies.

The invention discloses an astigmatism eye focal line visualization method and calibration device, and the device comprises an axial scale plate which is printed with an E-type sighting mark for far vision detection; the cross-shaped sighting mark disc is coaxially and rotatably embedded in the through hole; each group of small holes are linearly arranged along the two sides of the visual marking line, and the center connecting line of the small holes corresponds to the visual marking line in parallel; the fixed shaft penetrates through the center of the cross-shaped sighting mark disc and is mechanically connected with the transmission device; the LED light source is arranged on the back face of the axial position scale plate. The method has the beneficial effects that a clear, visible and unchanged astigmatism focal line objectively existing in the astigmatism eye to be detected can be provided for an examinee, and a clear criterion for accurately judging that a cross-shaped visual marking line coincides with the focal line can be provided, so that the accuracy of axial calibration of the astigmatism of the astigmatism eye can be improved to the maximum extent; the deviation between the calibrated astigmatism axial position direction and the actual astigmatism axial position direction is reduced, and the measurement precision and the measurement working efficiency are improved.

The utility model relates to a chewable tablet moisture determination technical field especially, it relates to a kind of chewable tablet moisture determination equipment, including installation base and the assembly box of being installed on installation base, the circular groove and annular outer cavity of concentric distribution are opened in assembly box, circular portable cover plate is assembled and connected on assembly box, the crushing mechanism for crushing chewable tablet to obtain chewable tablet powder is equipped in circular groove, heating mechanism for drying chewable tablet powder is arranged in annular outer cavity, detection mechanism for cooperating heating mechanism to detect whether chewable tablet contains water is fixedly connected and arranged on installation base on circular portable cover plate.This utility model drives transmission rod to rotate by driving motor, and the deflection angle of control blade is controlled by the rotation of driving rotary disc by inserting rod, so that chewable tablet is more completely crushed, and the efficiency of sawtooth blade and sawtooth groove grinding is higher under the holding of first flywheel by second flywheel.

The utility model discloses a measuring device for measuring a plant root system by a water immersion method, which is characterized in that a plant is fixed on a moving group through a clamping group, the moving group moves the plant to the position of a flushing assembly, and a high-pressure water gun flushes the root system to remove soil. The moving group moves the plant to the position of the measuring assembly, the root system is immersed in the measuring container, the image acquisition unit performs image acquisition on the root system, and the liquid supplementing group supplements water as required. In the whole process, the water conveying assembly supplies water to the high-pressure water gun and the liquid supplementing set through the first pipeline and the second pipeline, and continuity and stability of the flushing and measuring process are guaranteed. Through the arrangement of the fixing assembly and the moving assembly, automatic moving and positioning of the plant root system are achieved, through the separated design of the flushing assembly and the measuring assembly, the root system can be continuously flushed and measured, and the measuring efficiency is improved. The arrangement of the water delivery assembly ensures timely supply of water, and the whole device is compact in structure and easy and convenient to operate.

This application provides a high-throughput method for measuring fruit fly feed intake and its application, belonging to the field of animal feed intake research. The method includes: transferring each of multiple fruit flies to be tested into each well of a feeding plate in a high-throughput fruit fly feeding platform; adding a liquid food with a predetermined chemical composition to each well of the food substrate of the high-throughput fruit fly feeding platform; allowing the multiple fruit flies to feed freely for a predetermined time; measuring the protein content in the remaining liquid food after free feeding to obtain the remaining protein content in each well; and obtaining the feed intake of each fruit fly based on the remaining protein content in each well. By combining a high-throughput fruit fly feeding platform with protein concentration measurement, changes in the protein content of the liquid food are tracked to estimate changes in liquid volume, thereby improving the efficiency and accuracy of fruit fly feed intake measurement while simultaneously achieving high-throughput measurement.

The utility model belongs to the field of chemical equipment discloses an automatic stirring device and automatic temperature measurement system based on naphthalene crystallization point. Including temperature sensor, temperature sensor fixed base, reagent container fixing frame, reagent container, slide rail, motor shaft, stirring swing bar, reagent container mounting bracket, stirring support plate, shell, temperature sensor rack. The utility model has realized the automation and intelligentization of naphthalene crystallization point determination, improved the determination efficiency and accuracy.