17 results about "Isotopic tracer" patented technology

The invention discloses a river nitrogen pollutant source analysis method based on drainage basin nitrogen turnover and isotope, and particularly relates to the technical field of water treatment.The river nitrogen pollutant source analysis method comprises the following steps that a drainage basin to be researched is selected, river water and soil samples in the drainage basin are systematically collected, and physical and chemical indexes and isotope indexes # imgabs0 # of the collected samples are tested. Nitrate marked by nitrogen isotope delta 15N / delta 18O and # imgabs1 # are used as key indication marks to perform high-precision identification on nitrogen sources in a river and an environmental system, the contribution proportion of different nitrogen sources to the nitrate concentration in a water body is quantified through a stable isotope analysis model, and the concentration of the nitrate in the water body is calculated. And in combination with data, the rates of denitrification and anaerobic ammonia oxidation in environmental samples, sediments and soil are directly measured through combined application of an isotopic tracer technology and a membrane inlet mass spectrometer technology.

The invention belongs to the technical field of soil, and particularly relates to a method for quantitatively determining fluoride output loads in different land types of a lake basin. Comprising the following steps: S1, determining a fluoride source area of a lake basin, and determining the range of different land utilization types in the area; s2, collecting fluorides in the soil in the range of different land utilization types in the S1; s3, measuring A, A0 and Ah in different land utilization types by using an isotopic tracer technology based on the fluorides in the soil collected in the S2; and S4, on the basis of a result calculated in the S3, calculating fluoride-carried output loads in different land utilization types. According to the method, soil physicochemical property analysis is combined with an isotopic tracing technology, the sources and loads of different land utilization types of the particulate fluoride in the lake basin can be quantitatively analyzed, and the key areas of the sources of the particulate fluoride can be quantitatively identified according to the load source quantities of the particulate fluoride of different land utilization types; and then the key area is controlled.

A method of generating biogas is disclosed, including delivering a feedstock downhole to a coal reservoir, generating biogas within the coal reservoir, and harvesting the biogas. The method comprises delivering a feedstock downhole to a coal reservoir via an injection well, generating biogas within the coal reservoir through microbial action, creating a biogas that is isotopically differentiable from a background gas that is native to the coal reservoir, harvesting the biogas at the injection well and one or more offset wells of the coal reservoir, analyzing the biogas and coal bed methane from the coal reservoir at the injection well and at one or more offset wells within the same coal reservoir, detecting the biogas at the offset wells using isotopic differentiation, and mapping the migration of the biogas from the injection well to the offset wells using the biogas as an isotopic tracer.

Various methods and compositions of treating 4-hydroxyphenylpyruvate dioxygenase-like (HPDL)-related diseases or disorders are presented herein. Also presented herein are methods of increasing CoQ10 biosynthesis, and methods of determining whether a subject will benefit from a CoQ10 or CoQ10 alternative treatment. Also presented herein are pharmaceutical compositions and dosage forms comprising 4-hydroxymandelic acid (4-HMA), and / or its metabolites. Further presented herein are compounds that inhibit 4-hydroxyphenylpyruvate dioxygenase-like (HPDL). Further presented herein are methods of identifying and / or assessing modulators of HPDL. Yet further presented herein are example methods and systems for isotopic labelling in cells by metabolizing cells in the presence of gaseous isotopic tracer.

A kind of mouth of a river backfill drainage pipe network detection device and detection method, detection device includes elbow and shaft;The end of elbow is provided with plugging pipe, the other end is provided with connecting pipe, the shaft is installed on connecting pipe.Detection method includes the following steps: S0: determine suspected well;S1: assemble detection device;S2: detection device is put into water, after plugging pipe is aimed at the mouth of a river, it is inserted and plugged, so that detection device and the pipeline in suspected well form a communicating vessel structure;S3: water is taken from the field surface water body using water taking tool, after adding isotope tracer, mixed water body is poured into detection device from the top of shaft, so that mixed water body enters suspected well;S4: water quality sampling is carried out in suspected well and is detected, when the tracer put in is detected in water sample, then it can be judged that the inspection well is one of the paths of the mouth of a river as surface water invasion;S5: repeat steps S2 to step S4 to detect the water quality of multiple suspected wells.

The present application belongs to the field of well logging operation, and particularly relates to a wellhead releasing device and a small-bore injection well logging method. In view of the problem that the conventional isotope tracing profile logging technology cannot meet the tracing profile logging requirements of the small-bore double-layer tubing injection well, a small-diameter multi-parameter logging instrument is optimized. Firstly, a radioactive isotope tracer wellhead releasing device is developed, which releases the isotope tracer into the well sections that are not communicated with each other by using the injection pressure difference between different injection sections and installing the wellhead releasing device on the wellhead Christmas tree. Secondly, the isotope tracer anti-dispersion method is studied, and the isotope tracer parameters are optimized, so as to improve the coagulation ability of the liquid isotope tracer in long-distance migration, thereby improving the logging interpretation accuracy. Thirdly, the releasing device and the isotope tracer preparation method are applied to improve the construction process, so as to complete the logging operation and meet the application and popularization.

The device comprises a vertical square column body with an opening in the bottom and a hollow interior, triangular plates with downward tips are fixedly connected to the lower ends of the front side face and the rear side face of the vertical square column body, a plurality of layering seams are formed in the left side face of the vertical square column body, and layering insertion plate rails corresponding to the layering seams are arranged on the inner side of the vertical square column body; layered insertion plates which are matched with the layered insertion plate tracks and divide the internal space of the column body into a plurality of closed culture bins are arranged, and each culture bin is provided with two gas sampling bins and a culture bin injection device. The device can realize in-situ layered nitrogen removal rate experiment, can simultaneously meet the requirements of two nitrogen removal experiment modes of an acetylene inhibition method and an isotopic tracer method, can meet the requirements of nitrogen removal microorganism structure and abundance measurement, can realize relatively good matching degree of the in-situ nitrogen removal rate and in-situ physical and chemical data, and can be applied to the field of nitrogen removal. The method has high practical value and popularization prospect for understanding and mastering the nitrogen cycle process in the beach land and evaluating the ecological environment benefit of the beach land.

The invention relates to a method for jointly determining 241Am and 244Cm in aerosol by taking 243Am as a yield tracer, which comprises the following steps: step 1, sample pretreatment: cutting an aerosol sample into pieces, adding 243Am as an isotopic tracer, ashing, and leaching by adopting a nitric acid solution A; 2, valence state adjustment, wherein a ferrous sulfamate solution is sequentially added into the leaching solution for reduction treatment, and a sodium nitrite solution is added for oxidation treatment; step 3, precipitating calcium oxalate: sequentially adding oxalic acid and calcium chloride into the sample solution, adjusting the pH value to 2.0, collecting the precipitate, and firing; step 4, separation and purification: dissolving the sample with a nitric acid solution B, and then separating and purifying with a DGA resin column; and step 5, carrying out electro-deposition on the eluent in an ammonium sulfate system to prepare a source, and carrying out measurement of 241Am and 244Cm by adopting a low background alpha spectrometer. According to the method, interference of fission elements such as plutonium isotope is low, and the recovery rate of curium-244 is high.

The invention relates to the technical field of smart cities, and discloses a smart city happiness assessment system and method based on multi-dimensional perception, and the system comprises a data collection module which is configured to synchronously collect the tracer concentration time sequence data of an isotopic tracer released by an active isotopic tracer release unit in a preset city space, and concentration time series data of the plurality of volatile organic compounds detected by the chemical sniffer; and the signal source attribution module is connected with the data acquisition module and is configured to be based on the tracer concentration time sequence data and the concentration time sequence data of the volatile organic compound. The data acquisition module is configured for synchronous acquisition with high time resolution, and the signal source attribution module and the happiness evaluation module are used for continuous data processing and index calculation, so that continuous monitoring of group states is realized, and group emotion fluctuation caused by specific events or environmental changes can be captured more timely.

The invention discloses a method for evaluating the hydrogen electric drive removal rate in metal. The method comprises the following steps: obtaining two pieces of metal with the same deuterium content by adopting an isotopic tracer method; the method comprises the following steps: carrying out electric driving treatment on a piece of deuterium-containing metal at room temperature, and removing deuterium in the metal to obtain the metal subjected to electric driving treatment; respectively carrying out temperature programming desorption treatment on the metal subjected to electric driving treatment and another deuterium-containing metal which is not subjected to electric driving treatment, so that deuterium in the metal is completely desorbed, detecting the desorbed deuterium content through mass spectrometry, and recording the desorbed deuterium content as a first total desorption amount and a second total desorption amount; and according to the first total desorption amount and the second total desorption amount, the hydrogen electric drive removal rate in the metal at the room temperature is evaluated. According to the method, the air background hydrogen signal interference can be eliminated by adopting an isotopic tracing experiment method in which hydrogen is replaced by deuterium, mass-to-charge ratio analysis is carried out on substance molecules through mass spectrometry, and a deuterium desorption signal can be accurately detected, so that the accuracy of room-temperature electrically-driven removal rate evaluation is ensured.

The application provides a goaf cross-medium seepage-stress-structure coupling experimental device and method, relates to the technical field of rock mass mechanics testing, and comprises a structure simulation system, a gradient force loading system and a tracing seepage system; goaf accumulation rock samples are coaxially stacked on in-situ rock layers, and the in-situ rock layers are configured to simulate the floor rock layer close to the coal seam in the real goaf and are internally provided with water outlet micro flow channels. The gradient force loading system is used for dynamically applying uniform or gradient distribution axial pressure and confining pressure to the rock sample. The tracing seepage system comprises a water storage tank containing seepage water with an isotopic tracer and multiple camera modules. The internal fracture structure characteristics of the rock sample are output through the transparent shell, the tracing signal generated by the isotopic tracer and the seepage images collected by the camera modules. The problems that the existing experimental structure cannot truly reproduce the seepage-stress-structure three-field coupling and cannot accurately realize the internal fracture three-dimensional visualization and quantitative characterization are solved.

The invention provides a method for determining a sliding surface or position of a landslide by using a radioisotope tracer. The method comprises the following steps: firstly, preliminarily delineating the periphery of a landslide, then arranging three exploration lines, drilling a radioactive isotope tracer feeding hole and a plurality of observation holes in the exploration lines, and putting a layered water taking device into each observation hole; a radioactive isotope tracer is dissolved in water and then put into the source putting hole, water in the layered water taking device is extracted at regular time to detect the radioactivity of the water, after the radioactivity is detected, the layered water taking device in the observation hole is taken out, and the radioactive concentration of accumulated water in each layer is detected; and then drilling a soil hole at the upstream of each observation hole for drilling and coring to detect the radioactivity in the rock core, and accurately determining the position of the sliding surface or zone of the landslide according to the position and the concentration of the radioactivity in the accumulated water and the rock core. According to the method, the problem that the position of the sliding zone is difficult to determine in landslide investigation is effectively solved, the landslide investigation quality and efficiency are improved, and more accurate data are provided for subsequent treatment design.

The invention discloses a visual experimental device, system and experimental method for conventional triaxial hydraulic fracturing, which can simulate and visualize the triaxial hydraulic fracturing process under controllable conditions by applying confining pressure and axial stress to an experimental sample and injecting fracturing fluid to simulate fracturing, thereby improving the predictability and efficiency of field operation. A radioisotope tracer detection imaging technology is used for monitoring the crack expansion process in real time, direct crack dynamic data are provided through comprehensive and real-time monitoring of a radioactivity detection probe and a detection imaging system, rock responses under different fracturing parameters can be predicted, and therefore a fracturing scheme with the highest cost benefit is selected; according to the invention, the formation and expansion of cracks in the experimental rock sample can be comprehensively observed in real time; the device is suitable for the industries of rock mechanics and petroleum engineering, and is used for simulating and monitoring the cracking and crack propagation process of experimental rock samples.

The invention discloses a method for tracing the hydrothermal activity of a sedimentary basin, and belongs to the technical field of geochemistry and isotopic tracing. The tracing method comprises the following steps: pre-treating a mixed mineral sample, separating and purifying a lithium element, and measuring a delta 7 Licarb value; carrying out correlation analysis on the delta 7 Licarb value and the main trace element characteristics of the sample; correcting the measured delta 7 Licarb value of the mixed mineral sample; performing correlation analysis on the corrected data of the mixed mineral sample, a hydrothermal activity index and an anti-weathering index; and determining a corrected background value of delta 7Li in the research sequence, and judging a hydrothermal activity enhancement period, a hydrothermal activity weakening period or a non-hydrothermal dominant period by comparing a difference between a lithium isotope ratio of a continuous layer section and a background interval value. The method has the advantages of continuous high resolution, wide temperature range sensitive response, clear mechanism, strong anti-interference capability and strong universality.

The present invention belongs to the technical field of soil stable isotope tracing, and provides a soil stable isotope fixed-point delivery device for reducing bottom leakage, including a water storage bag, a connecting box, an inflatable bag, a control system and an injection system; the injection system is composed of a syringe, a flat-top injection head and a water filling hole located at the top of the water storage bag, and the control system is composed of a remote controller, a delivery motor, a puncture motor and a pressure sensor. The remote controller is connected to the drug delivery motor to instruct the drug delivery motor to work, and when the air pressure in the inflatable bag reaches a predetermined value, the pressure sensor is triggered, and the pressure sensor sends an instruction to the puncture motor to puncture the bottom of the water storage bag, and the isotope tracer flows into the connecting box, and the isotope tracer flows out of the connecting box through the water guide hole and flows into the soil layer along the expanded inflatable bag. The device of the present invention is simple and effective, and can accurately and quickly deliver the isotope tracer to the target soil layer over a large area without "pollution", and can also effectively reduce the amount of stable isotope tracer and reduce the test cost.

The application discloses a kind of sedimentary basin hydrothermal activity tracer method, belong to geochemistry and isotopic tracer field.The tracer method includes the pretreatment of mixed mineral sample, lithium element separation and purification and δ 7 Li carb Value determination;The correlation analysis of δ 7 Li carb Value and the main trace element characteristics of sample;The measurement δ 7 Li carb Value of mixed mineral sample is corrected: the correlation analysis of corrected data of mixed mineral sample and hydrothermal activity index and anti weathering index;Determine the δ 7 Li 校正后 Background value in study sequence, judge hydrothermal activity enhancement period, hydrothermal activity weakening period or non-hydrothermal dominant period by comparing lithium isotopic ratio of continuous section and background interval value difference.The method has the advantages of continuous high resolution, wide temperature range sensitive response, mechanism is clear, strong anti-interference ability and strong universality.

A method of generating biogas includes delivering a feedstock downhole to a coal reservoir, generating biogas within the coal reservoir, and harvesting the biogas. A method of tracing the migration of biogas in a coal reservoir includes delivering a feedstock downhole to a coal reservoir via an injection well, generating biogas within the coal reservoir through microbial action, creating a biogas that is isotopically differentiable from a background gas that is native to the coal reservoir, harvesting the biogas at the injection well and one or more offset wells of the coal reservoir, analyzing the biogas and coal bed methane from the coal reservoir at the injection well and the offset wells, detecting the biogas at the offset wells using isotopic differentiation, and mapping the migration of the biogas from the injection well to the offset wells using the biogas as an isotopic tracer.