22results about "Chemical methods analysis" patented technology

This invention discloses a simulation device for hydrothermal reactions under vacuum chamber dehydration accidents, belonging to the field of vacuum chamber accident simulation technology. The device includes a quartz tube with its opening facing upwards, an induction heating coil wound around its exterior, and a detachably sealed end of the quartz tube via a flange assembly. A water injection pipe extending from the lower end of the flange assembly to above a metal sample is connected to a storage tank. The flange assembly also has an outlet pipe communicating with the inner cavity of the quartz tube, which is connected to a mass spectrometer analysis unit via a liquid nitrogen cold trap. The middle section of the outlet pipe is connected to a vacuum pumping unit via a vacuum pumping pipe. A monitoring unit is located on one side of the quartz tube. This invention integrates vacuum acquisition, induction heating, controllable coolant injection, in-situ monitoring, and online analysis of gaseous products, achieving comprehensive simulation of the high-temperature metal-coolant hydrothermal reaction process under vacuum chamber dehydration accidents. It is suitable for preliminary research on vacuum chamber dehydration accidents in fusion devices, high-temperature high-vacuum furnaces, and other similar applications.

This invention relates to the field of thermal stability evaluation technology, and more particularly to a method and apparatus for evaluating the thermal stability of organic heat transfer fluids. The evaluation method includes: placing the organic heat transfer fluid in a loading container, introducing an inert gas to replace the air, sealing the container, and then conducting a high-temperature thermal test; after the high-temperature thermal test, cooling the loading container and then restoring it to atmospheric pressure; after the organic heat transfer fluid returns to room temperature, measuring the indicators of the organic heat transfer fluid, including kinematic viscosity, degradation rate, and pressure; scoring each indicator based on the kinematic viscosity change rate, degradation rate, and pressure increase value; and judging the thermal stability of the organic heat transfer fluid based on the comprehensive score. This invention provides a method and apparatus for evaluating the thermal stability of organic heat transfer fluids, enabling a rapid, efficient, and multi-dimensional evaluation method for the thermal stability of organic heat transfer fluids.

This invention provides an in-situ heating and electrical testing apparatus and method for scanning electron microscopy (SEM). The apparatus includes a T-shaped sample stage, an in-situ heating and electrical testing chip, a probe card, wires, a vacuum flange with a BNC interface, a signal source meter, pins, and fixing studs. The in-situ heating and electrical testing chip is placed on the T-shaped sample. The probe card presses into contact with the heating and testing electrodes on the in-situ heating and electrical testing chip and leads out wires, simultaneously fixing the chip. The fixing studs secure the probe card to the T-shaped sample stage. The vacuum flange with the BNC interface connects the probe card and the signal source meter via wires. This invention provides in-situ heating, electrical testing, and microstructure observation functions for SEM, offering advantages such as rapid heating and cooling, low thermal drift, and low electromagnetic interference. It provides a platform for testing the performance of micro and nanomaterials and an experimental platform for preliminary screening of transmission electron microscopy (TEM) samples.

The present invention relates to pancreatic cancers and the use of biomarkers in biological samples for the diagnosis of such conditions, in particular pancreatic ductal adenocarcinoma. The biomarker panel comprises LYVE1, REG1 and TFF1. Methods of treatment are also provided, as well as kits useful in the diagnosis and treatment of pancreatic ductal adenocarcinoma. The present invention is particularly useful in detecting early-stage PDAC.

The present invention is directed to a biological marker of ovarian cancer, including early stage ovarian cancer. Specifically, the present invention provides methods for detecting ovarian cancer in a subject which include detecting an expression level of the biological marker junction plakoglobin in blood of the subject. An expression level of junction plakoglobin that is higher than a reference expression level for junction plakoglobin indicates that the subject has ovarian cancer. Methods of identifying a subject having ovarian cancer and methods of determining if a subject is susceptible to developing ovarian cancer are also provided based on detecting the expression level of junction plakoglobin in blood of the subject. The present invention also extends to methods of treatment of ovarian cancer together with methods of screening a candidate therapeutic agent for use in treating ovarian cancer. Furthermore, compositions and kits for detecting ovarian cancer in a subject are provided, as well as a method of identifying a biomarker for a cancer, including ovarian cancer.

The utility model relates to oil liquid detection technical field especially crude oil water content monitoring devices, including oil storage tank, still include: single -way pipe, single -way pipe sets up in the top of oil storage tank, piston, the piston sets up in the inside of oil storage tank, second drive assembly is connected on the piston, liquid collecting pipe, the liquid collecting pipe fixed communication is on the sealed end of single -way pipe top, the inner diameter of liquid collecting pipe is less than the inner diameter of single -way pipe, heating device is fixedly installed on the liquid collecting pipe, the utility model discloses through single -way pipe vertical downward movement and to oil water carries out the collection, can collect the liquid of different liquid level to reduce the influence of oil water layering to water content data, effectively improve the reflection of sampling data to overall data, improve the accuracy degree of monitoring data.

An analysis device for analyzing a sample by combustion, said analysis device comprising: a combustion tube for combusting the sample in an internal space; a sample supplier for supplying the sample to the combustion tube; a sample injection tube for guiding the sample supplied from the sample supplier to the combustion tube; a tube holding part that has a holding hole for holding an end portion of the sample injection tube, and an ejection part positioned below the holding hole and provided with a through hole penetrating in the vertical direction so as to eject the sample supplied from the sample supplier vertically downward through the sample injection tube, the tube holding part being positioned above the combustion tube; and a fixing member that fixes the end portion of the sample injection tube in a state of being held in the holding hole, and fluidly connects an opening of an end surface of the end portion of the sample injection tube to the through hole of the ejection part.

The application provides a rice product raw material quality prediction device and application, and relates to the technical field of food quality detection and control. The method first divides rice product raw materials into several groups according to weight, extracts equal-weight raw materials from each group as detection samples, and uses a Japanese Sakuradake particle evaluator to detect cracks, yellowing and insect-damaged particles in the samples and weigh them. At the same time, the samples are ground into three equal parts, and the Kjeldahl method, oven drying method and iodine colorimetric method are used to determine the contents of protein, moisture and amylose in the samples, respectively. The infrared spectroscopy imaging technology is used to record the absorbance of the samples at a specific waveband, and a prediction model of the contents of protein, moisture and amylose is established based on the partial least squares method. According to different evaluation standards, the limitations of traditional single-index detection are avoided, and the stable high quality of products in terms of taste, nutritional value, appearance and shelf life is ensured.

This system detects the deterioration of ozone removal filters, regardless of the type of ozone removal filter used. [Solution] The indicator 1 is installed on the secondary side of the ozone removal filter 10, and the output gas output from the ozone removal filter 10 flows through the through hole 21 of the main body block 2. The main body block 2 has a branch hole 25 that branches off from the through hole 21. The prevention member 20 installed inside the through hole 21 prevents the part of the prevention member 20 that comes into contact with the output gas from deteriorating when the ozone removal function of the ozone removal filter 10 is not degraded, and prevents the output gas from leaking from the through hole 21 to the branch hole 25. Since the pressure in the branch hole 25 does not fluctuate, the display device 7 does not switch the display mode. On the other hand, when the ozone removal function of the ozone removal filter 10 deteriorates, the part of the prevention member 20 that comes into contact with the output gas deteriorates due to ozone, and the output gas leaks from the through hole 21 to the branch hole 25. The display device 7 switches the display mode due to the increase in pressure in the branch hole 25.

The utility model relates to the technical field of light response levelling agent curing performance test, and disclose a kind of light response levelling agent UV curing performance testing device, including, for supporting bottom plate, the bottom plate is made of steel plate, multiple for supporting bracing plate, four for supporting and connecting fixed plate, fixedly welded in the top of bottom plate, four for supporting slide bar, slidingly connected in the inside of fixed plate, two linkage plates, two linkage plates fixedly welded in the side of four slide bars close to, for supporting structure.The light response levelling agent UV curing performance testing device, by opening motor, motor will drive eccentric wheel rotation, eccentric wheel will extrude both sides arc plate, arc plate will drive linkage plate transverse movement, drive slide bar sliding in fixed plate inside, cooperate spring use, to realize the effect of transverse reciprocating movement, to realize the effect of vibration test plate, leveling agent and epoxy acrylate are leveled, can realize better and uniform curing effect.

The present application belongs to the technical field of carbon dioxide capture, utilization and storage, and particularly relates to a novel device for monitoring the degree of carbon dioxide mineralization carbon sequestration reaction in multiple ways, comprising: a CO2 gas storage tank, a mineralization reaction kettle, a CO2 gas analyzer, an embedded pH electrode, a miniature optical fiber spectrometer and a data acquisition terminal. The mineralization reaction kettle is provided with a temperature control unit, a slurry bearing table and a stirring unit. The CO2 gas storage tank is connected to the reaction kettle through a pipeline with a flow control valve. The CO2 gas analyzer, the embedded pH electrode and the miniature optical fiber spectrometer are used to monitor the unreacted CO2 concentration, the slurry pH value and the amount of key phases such as calcium carbonate and calcium hydroxide, respectively. Each monitoring component is electrically connected to the data acquisition terminal. The present application realizes real-time in-situ linkage monitoring of multiple parameters, reduces the disturbance and lag of offline detection, improves the monitoring accuracy and experimental efficiency, and is suitable for monitoring the carbon dioxide mineralization carbon sequestration reaction process of industrial solid waste and natural minerals.

This invention discloses a method for confirming the passivation layer of the positive grid of a lead-acid battery panel, comprising the following steps: S1, initial cleaning; S2, removal of lead dioxide; S3, secondary cleaning; S4, drying treatment; and S5, acetic acid reaction test. By observing the reaction of the grid surface with the acetic acid aqueous solution (whether bubbles are generated) and the appearance of metallic luster, the presence of a passivation layer can be directly determined. The results are intuitive and easy to understand, requiring no complex data analysis. Pre-treatment steps such as initial cleaning, lead dioxide removal, and secondary cleaning effectively eliminate interference from other substances on the grid surface, ensuring the accuracy of the acetic acid reaction test. Furthermore, by optimizing reaction conditions (such as acetic acid concentration, reaction temperature, and reaction time), the reliability of the test results is further improved.

The invention discloses a digestion furnace and a Kevlar azotometer, and relates to the technical field of detection equipment.The Kevlar azotometer comprises the digestion furnace, a distillation device, a titration device, a control device, a waste discharge device and other auxiliary equipments.The digestion furnace is internally provided with a heating circuit used for controlling heating; the heating circuit comprises a main circuit and a plurality of branch circuits connected in parallel, the main circuit is provided with a power supply and a main circuit switch, each branch circuit is provided with a branch circuit switch and a plurality of heating loads, and each heating load corresponds to one furnace eye. According to the application, the master switch and the plurality of branch switches are arranged, so that partitioned independent control of the furnace eye of the digestion furnace is realized, different temperatures, heating rates and heat preservation durations can be set for furnace eyes of different branches according to digestion requirements of different types of samples (such as high-protein, low-protein, high-salt and easy-to-blister samples), the nitrogen recovery rate is effectively improved, and the production cost is reduced. And the accuracy of a detection result is ensured.

This application discloses a method for measuring the sulfur content of incompletely oxidized pyrite, relating to the field of chemical analysis and detection. The disclosed method includes: after pyrite undergoes an oxidation reaction in a water-rock system, the mixed solution is separated into a first supernatant and a first residual solid. Iron ions in the first residual solid are extracted using an ethylenediaminetetraacetic acid (EDTA) solution. The total sulfur content in the pyrite powder resulting from the oxidation reaction is determined based on the total iron ion content (the sum of iron ions in the first supernatant and the iron ions extracted by ETA). The sulfur content in the sulfate is determined based on the sulfate (SO4) concentration in the first supernatant. The sulfur content of the incompletely oxidized pyrite powder is calculated by subtracting the sulfur content in the sulfate from the total sulfur content. Compared with existing research, the measurement method of this application improves the accuracy of estimating the oxidation amount of pyrite, which is beneficial for accurately predicting the amount and trend of sulfate scaling in geothermal systems.

The present solution consists of a method that allows the determination of the quantity and content uniformity of an active ingredient in a pharmaceutical formulation. This method involves reading the infrared spectroscopic signal of the active ingredient, preferably using a quantum cascade laser (QCL), although other spectroscopic techniques are also valid.The spectroscopic data obtained is analyzed through a multivariable analysis model using partial least squares (PLS), which is then used to train an artificial intelligence system. This trained AI is capable of determining the concentration of the active ingredient in the pharmaceutical formulation.By taking measurements at different physical points in the formulation, it is also possible to determine the distribution of the active ingredient within the formulation, and therefore, its uniformity.

This invention relates to an experimental apparatus for testing the dynamic mechanical properties of energetic materials, comprising an incident rod, a transmission rod, and a high-speed camera, as well as a sealed reaction chamber disposed between the incident rod and the transmission rod. The free ends of the incident rod and the transmission rod extend into the sealed reaction chamber from opposite sides. An observation window is provided on the first side wall of the sealed reaction chamber corresponding to the high-speed camera, which can be used for recording images. This invention solves the problem in existing experimental apparatuses where the lens of the high-speed camera is damaged by the splashing of reactants, debris, etc., generated during the test.

This invention provides a protein detection method, apparatus, electronic device, and storage medium. The method includes: identifying the graphic codes of multiple samples to be tested and determining the dairy product category of each sample from the identification information; determining scheduling information for testing each sample based on historical detection data of its dairy product category; identifying the position information of each dairy product sample based on a sample stage image; and, based on the scheduling information and position information, sequentially retrieving samples from the sample stage and feeding them into a nitrogen analyzer to perform protein detection on the samples in the sample stage. This method of sequentially retrieving samples from the sample stage and feeding them into the nitrogen analyzer based on the scheduling and position information achieves a highly automated detection process, improving the accuracy and reliability of the detection.