195results about "Chemical methods analysis" patented technology

The invention provides a seawater fish freshness detection method and device based on machine vision and FPS, and relates to the technical field of prefabricated aquatic product nondestructive detection.The device comprises a mounting box, an automatic lifting clamp device is arranged at the inner bottom of the mounting box, and a fixed-distance pressing device is arranged at the position, corresponding to the automatic lifting clamp device, of the top of the mounting box; a top image shooting device is arranged on the fixed-distance pressing device, an infrared sensing positioning device corresponding to the fixed-distance pressing device is arranged in the mounting box body, a side industrial camera is arranged on one side of the interior of the mounting box body through a first support, a plurality of lighting devices are arranged on the upper portion of the side wall of the mounting box body, and a control unit is arranged at the bottom of the mounting box body; the top image shooting device, the infrared sensing positioning device, the side industrial camera, the automatic lifting clamp device, the lighting device and the fixed-distance pressing device are all electrically connected with the control unit. According to the invention, high-efficiency and automatic seawater fish freshness detection can be realized.

The utility model relates to the technical field of environmental air pollutant concentration monitoring, and provides a peroxy radical chemical amplification device which comprises a sampling-amplification channel, a first acquisition control circuit module is arranged in the sampling-amplification channel and used for controlling an electric control program of a device system, and a second acquisition control circuit module is arranged in the sampling-amplification channel. An HO photolysis module is arranged in the sampling-amplification channel, a second acquisition control circuit module is arranged in the sampling-amplification channel and used for controlling an electric control program of the device system, and a gas path module is arranged in the sampling-amplification channel and used for controlling the gas flow direction of the device system; according to the utility model, the sampling-amplifying channel is arranged, so that the device is simple in structure, simple to operate, low in manufacturing cost and high in time resolution; the inhibition effect of the environment humidity on the amplification reaction is solved to a certain extent, and the actual effects of accurate measurement, simple operation and stable operation are obtained.

The invention discloses a saline-alkali soil crop-soil system nutrient dynamic matching regulation and control method, relates to the technical field of agricultural planting, and aims to solve the technical problems of saline-alkali soil nutrient imbalance, limited crop nutrient absorption and low efficiency of a traditional regulation and control mode, and the method comprises the following steps: S1, preparation before sowing; performing layered deep scarification treatment on a plough layer of the saline-alkali soil, synchronously applying a salt control improvement material to a deep plough layer to improve a saline-alkali environment, and arranging a layered under-film drip irrigation system matched with crop root zone distribution; s2, monitoring in a whole growth period; in the whole growth period of crops, plough layer soil samples are collected in a layered mode, soil salinity and nutrient indexes are measured, meanwhile, the growth state of the crops is monitored, and the incidence relation between the soil indexes and crop growth is established. The method solves the problem that nutrient supply is disjointed with the requirements of the root zone and the growth period of the oil sunflower in the prior art, creates adaptive saline-alkali environment and nutrient conditions for the whole growth period of the oil sunflower, and guarantees normal growth and development of the oil sunflower.

The invention relates to the technical field of agricultural disease prevention and control, and discloses a rice damping-off prevention and control system based on soil ecology regulation and control, comprising the following modules: a soil ecology monitoring module used for acquiring physical properties, chemical properties and microflora related data of paddy field soil in real time; and the data transmission and storage module is connected with the soil ecology monitoring module and is used for transmitting the data acquired by the soil ecology monitoring module to a storage end and storing the data. The rice damping-off prevention and control system based on soil ecology regulation and control can comprehensively and accurately obtain soil ecology data in real time, guarantee stable, safe transmission and proper storage of the data, accurately judge the rice damping-off occurrence risk and perform early warning in time, and effectively prevent and control rice damping-off. The problem that the paddy field soil ecology cannot be accurately monitored, analyzed, regulated and controlled in multiple dimensions is solved.

The invention is directed to a conjugate having the general formula (I)Xn—P—YmBo  (I)with X is an detection moiety,P is a spacer unit,Y an antigen recognizing moiety,B an oligonucleotide comprising 2 to 100 nucleotide residuesand n, m, o are independent integers between 1 and 100wherein P and B are covalently bound to Y and X is covalently bound to P and wherein X is erasable.Further, the invention is directed to a library of such conjugates and a method of detecting target cells utilizing the conjugates or the library of conjugates.

The present invention makes it possible, when using a calibration curve of an IC analysis device or the like to analyze the content of sulfur and / or halogen contained in a sample, to perform the analysis with good precision without the use of a reagent such as hydrazine or hydrogen peroxide.　In the present invention, when preparing an absorption liquid to introduce into an analysis device, an absorption tube comprising an electrode for electrolysis is used, electrolysis is performed on an absorption liquid accommodated in the absorption tube, thereby performing oxidation or reduction of a target component in the absorption liquid, and the absorption liquid is then introduced into the analysis device.　

Method and apparatus to enable detection, count, and recordation of properties of particles of ultrafine particle sizes (<0.1 micron) as well as particle of larger sizes with the use of a condensation nuclei counter configured to enable multiple stages of volume expansion with the use of an array of fluidly connectable chambers.

The invention provides a chemical computer having a matrix, an input device and an analytical device. The matrix is a plurality of interconnected reaction spaces holding a reaction mixture; the input device is provided to independently address each of a plurality of reaction spaces within the matrix; and the analytical device has a sensor to analyse a reaction characteristic of a reaction mixture in one or more reaction spaces. Also provides are methods for using the chemical computer, and the use of the chemical computer as a logic gate.

Described herein are methods, assays and techniques for detecting and / or measuring anti-drug antibodies that bind to a protein, polypeptide or other compound or molecule that comprises at least one immunoglobulin variable domain with an exposed C-terminal region.

One embodiment according to this invention provides a method for selecting an additive agent for suppressing a nitrosation reaction. Alternatively, one embodiment of the present invention provides a formulation that suppresses the generation of nitroso compounds, including an additive agent selected by a method for selecting an additive agent for suppressing a nitrosation reaction. In one embodiment, a method for selecting an additive agent for suppressing a nitrosation reaction includes adding an amine source and an NOx source to an additive agent to generate nitroso compounds, quantifying an amount of the generated nitroso compounds, and evaluating a suppressing effect of the nitrosation reaction of the additive agent based on the amount of the generated nitroso compounds.

A calibration curve solution production system that produces and supplies a calibration curve solution for creating a calibration curve to a measurement device that uses the calibration curve to measure the total organic carbon concentration of a liquid to be analyzed. The system includes an analyte line that conducts the liquid to be analyzed to a TOC analyzer, a standard solution line that conducts a standard solution to the analyte line, a mixing unit installed on the analyte line that mixes the diluent and the standard solution to dilute the standard solution and supplies to the TOC analyzer the mixture of the diluent and the standard solution mixed in mixing unit as the calibration curve solution.

The present invention relates to an oven (1, 1') for an analytical system, in particular for a titration system, in particular for a Karl Fischer titration system. The oven (1, 1') comprises a housing, a blocking system (2a, 2a', 2b, 2b', 2c, 2c') and an insert (3, 3') for a sample container. The blocking system (2a, 2a', 2b, 2b', 2c, 2c') is arranged at least partially around the insert (3, 3'). At least one heating element is arranged between the blocking system (2a, 2a', 2b, 2b', 2c, 2c') and the insert (3, 3') and at least partially surrounds the insert (3, 3'). The present invention also relates to a titration system and a titration method having such an oven (1, 1').

Provided are an anti-CLDN18.2 antibody or antigen-binding fragment thereof, a nucleic acid molecule encoding the same, an immunoconjugate, bispecific molecule, chimeric antigen receptor and pharmaceutical composition comprising the same. The antibody or antigen-binding fragment thereof is used for preventing and / or treating a tumor.

The utility model discloses an azotometer for protein detection, and relates to the technical field of azotometers for protein detection. A connecting piece is fixedly connected to the side face of the digestion pipe, a telescopic rod is slidably connected to the interior of the fixing groove, a check block is fixedly connected to the bottom of a sliding rod, and a sliding block is connected to the outer portion of the sliding rod in a sleeving mode, and when the digestion pipe is clamped into the mounting groove, the check blocks fixedly connected to the two ends of the mounting groove are firstly clamped into the connecting groove; the telescopic rod shrinks towards the interior of the connecting piece due to the extrusion effect of the check block, when the top of the check block enters the interior of the connecting groove, the telescopic rod is clamped to the top of the check block under the reset effect of the telescopic spring, the telescopic rod continues to slide upwards outside the sliding block, and a protruding block at the bottom of the sliding block is driven downwards to be embedded into a clamping groove; at the moment, the telescopic rod can slide outside the sliding block and the stop block, and the digestion pipe is separated from the interior of the mounting groove, so that the digestion pipe is more convenient to disassemble and assemble.

This document provides methods and materials involved in treating cancer. For example, chimeric antigen receptor T cells having reduced levels of GM-CSF are provided. Also provided as methods for making and using chimeric antigen receptor T cells having reduced levels of GM-CSF.

The utility model discloses a device for evaluating the performance and loss of a desulfurizing agent based on a complex iron method, which relates to the technical field of complex iron desulfurization and specifically comprises a gas inlet module, a desulfurization module, a desulfurizing agent regeneration module, a sulfur precipitation module and a desulfurizing agent self-circulation module which are connected in sequence, the central control module is in communication connection with the monitoring module; the tail gas treatment module is connected with the desulfurization module; the desulfurization module adopts a desulfurization tower; the desulfurizing tower comprises a gas inlet, a gas outlet, a desulfurizing agent inlet and a desulfurizing agent outlet; the gas inlet module is connected with a gas inlet of the desulfurization module, a desulfurizer outlet of the desulfurization module is connected with the desulfurizer regeneration module, and a desulfurizer inlet of the desulfurization module is connected with the desulfurizer self-circulation module. According to the utility model, the data collected by the monitoring module is transmitted to the central control module, and the central control module receives and processes the data to obtain the performance index of the desulfurizing agent and the loss index of the desulfurizing agent, so that the performance of the desulfurizing agent and the loss of the desulfurizing agent are accurately evaluated in real time.

Provided is a method for analyzing fumed silica, which makes it possible to improve the accuracy of analysis of fumed silica, particularly analysis by a combustion method, to a level that has not been achieved before. [Solution] A sample of fumed silica is compacted using a fumed silica compaction jig that includes, for example, a cylindrical cylinder 1, a base 2 forming the bottom surface of the cylinder, and a cylindrical piston rod 3 that can be fitted into the cavity of the cylinder, preferably to a compacted body with a bulk density of 150 g / L or more, and the obtained compacted body is then subjected to analysis.

To provide a coloring agent capable of detecting cannabinoids, and a detection method and a detection kit for cannabinoids.SOLUTION: A coloring agent comprises a compound represented by formula (1) or formula (2). (In the formulas, R1 is a nitro group, cyano group, hydroxy group, alkoxy group, carboxy group, sulfo group, alkyl group, halogenated alkyl group, H, or the like; R2 and R4 are each a nitro group, cyano group, hydroxy group, alkoxy group, carboxy group, sulfo group, alkyl group, H, or the like; R3 and R5 are each an alkoxy group, alkyl group, alkenyl group, substituted or unsubstituted phenyl group, hydroxy group, or H; R6 and R7 are each an alkoxy group, alkyl group, or phenyl group; and X- and Y- are counter anions.)SELECTED DRAWING: None

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.

The utility model relates to the technical field of chemical pollutant detection, in particular to a chemical pollutant detection device based on a nano material, which comprises a permeation tube and a filter tube which are magnetically attracted together through two magnets, the nano material, namely a nano RO (Reverse Osmosis) membrane, is arranged between the two tube bodies, the filter tube is fixed on a pushing mechanism capable of pushing forwards and backwards, and the permeation tube is fixed on the filter tube. The permeation pipe is clamped and fixed by a size-adjustable fixing mechanism, a heating device is further arranged on the periphery of the permeation pipe, a mechanical piston is arranged on a pipe opening of the permeation pipe, and a rubber pipe above the mechanical piston can be controlled to stretch out and draw back up and down through a micro motor; according to the utility model, the nano RO membrane is used for separating the upper layer and the lower layer of chemical pollutants so as to improve the pollution concentration and facilitate detection; a magnetic separation technology is adopted, manual direct contact is not needed, and harm of chemical pollutants to a human body is reduced.

The present invention relates to methods of determining a potency state of an embryonic stem cell (ESC) in culture, comprising detecting the expression level of Negative Elongation Factor Complex Member A (Nelfa) in the ESC, and correlating the expression level of Nelfa with that of a reference sample to determine the potency state of the ESC. The present invention also provides methods of selecting totipotent-like ESCs from a population of ESCs in culture using an anti-Nelfa antigen binding protein, methods of inducing totipotency in an ESC in culture, methods of improving the reprogramming efficiency of a somatic cell into an induced pluripotent stem cell and methods of reprogramming a somatic cell into a totipotent stem cell by inducing Nelfa expression. Cells comprising an expression vector encoding Nelfa and kits for use in the methods of the invention are also provided.

The present disclosure is directed to a method (a) for quantifying polysorbate in an aqueous formulation containing polysorbate and one or more (poly)peptides, comprising the following steps: (a.1) providing a sample of the aqueous formulation; (a.2) adding a solution containing the fluorescent dye N-phenyl-1-naphthylamine to the sample of step (a.1) to obtain a fluorescent dye-containing sample to be tested in a fluorescent micelle assay; (a.3) optionally incubating the fluorescent dye-containing sample of step (a.2); (a.4) performing a fluorescent micelle assay with the fluorescent dye-containing sample obtained in step (a.2) or step (a.3); (a.5) determining the content of polysorbate present in the sample from the fluorescent micelle assay performed in step (a.4); provided that the method is performed without the use of an HPLC-system. The further method (b) of the present invention also allows high-throughput screening of a large number of samples. The presence of (poly)peptides(s) does not in any way interfere with the fluorescent micelle assay measurement.

The utility model discloses a nitrogen determination device for food quality detection. The nitrogen determination device comprises a main body, an adjusting screw rod and a fixing mechanism, two sliding grooves are formed in the front end of the main body, and adjusting screw rods are in threaded connection with the interiors of the sliding grooves; the two fixing mechanisms are arranged on the adjusting screw rod in an array mode. The fixing mechanism comprises a mounting plate, an adjusting ring, a screw rod and a driving gear; top blocks are symmetrically arranged at the rear end of the mounting plate and are in threaded connection with adjusting screw rods; mounting groove mounting screws and driving gears are arranged at the upper end of the mounting ring in an array manner; the lower part of the mounting ring is rotationally connected with an adjusting ring; a circular ring is formed at the front ends of the screw rods in the mounting grooves arranged in the array; the screw rod is in sliding connection with the mounting groove, and the screw rod is in threaded connection with the driving gear; a replaceable sponge layer is arranged at the front end of the screw rod; the driving gear is in gear connection with the adjusting gear; the driving gear is controlled to rotate by rotating the adjusting ring, the screw rod is controlled to move back and forth, and the diameter of a circular ring formed at the front end of the screw rod in the mounting groove is adjusted.

To provide a method for efficiently analyzing a target substance even when a source solution contains a small-sized chemical species at a low concentration.SOLUTION: There is provided a method for analysis for estimating the concentration of a target substance in a source solution containing the target substance and a standard substance, the method including: a concentration step of concentrating the source solution to obtain a concentrated solution; and a concentration measurement step of measuring concentrations of the target substance and the standard substance in the concentrated solution. In the concentration step, the target substance and the standard substance are of the same chemical species, the standard substance includes an isotope ES of an element EA contained in the target substance, and the concentration CA,0 of the target substance in the source solution is estimated by the following equation (2) using the concentration CA,1 of the target substance in the concentrated solution, the concentration CS,0 of the standard substance in the source solution, the concentration CS,1 of the standard substance in the concentrated solution, the concentration ratio X of the source solution in the concentration step, and the recovery rate R of the standard substance determined by the following equation (1): R=CS,1 / (X×CS,0) (1): CA,0=CA,1 / (X×R) (2).SELECTED DRAWING: Figure 1

The application relates to a forced oxidation test system, comprising: a forced oxidation subsystem, a first machine box, a second machine box and a connecting device; the inner cavities of adjacent forced oxidation subsystems are arranged in parallel; the forced oxidation subsystem comprises: forced oxidation parts, the inner cavities of adjacent forced oxidation parts are arranged in series; the packaging to be tested is placed on the first machine box; the second machine box is connected with the first machine box through the connecting device; the forced oxidation subsystem is installed on the second machine box, and the forced oxidation part is arranged opposite to the packaging to be tested; the second machine box is configured to act along the axis of the connecting device to the direction close to the packaging to be tested, and is sealedly installed into the inner cavity of the forced oxidation part on the packaging to be tested, so that the displacement gas in the inner cavity of the forced oxidation part penetrates into the packaging to be tested. The forced oxidation subsystems of the application can provide stable packaging to be tested with different oxygen permeation degrees for shelf life simulation test.

The invention provides an acid rock reaction kinetics testing device and method, and relates to the technical field of acid rock reaction kinetics test.The device comprises a reaction kettle, a rotation driving part is arranged in the reaction kettle, and the rotation driving part is used for being connected with a rock core sample and can drive the rock core sample to rotate in the reaction kettle; a first heating part is arranged on the outer side of the reaction kettle; the acid injection structure is connected with the liquid inlet pipeline of the reaction kettle, and the acid injection structure is used for being connected with a gas source; the cooling structure is connected with a liquid outlet pipeline of the reaction kettle; the reinjection structure is connected with an output pipeline of the cooling structure and is connected with the acid injection structure through a reinjection pipeline; the problems that in the acid rock reaction kinetics testing technology in the prior art, spraying of steam-state spent acid can affect the sampling precision of the spent acid and form potential safety hazards, and for a high-temperature and high-pressure reaction kettle, a large amount of time needs to be consumed for cooling after each test, and continuous testing cannot be conducted are solved.