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395 results about "Stock solution" patented technology

A stock solution is a concentrated solution that will be diluted to some lower concentration for actual use. Stock solutions are used to save preparation time, conserve materials, reduce storage space, and improve the accuracy with which working lower concentration solutions are prepared.

Method for detecting protein content in 3D-MLA adjuvant

The invention relates to the technical field of medicine analysis and detection, and particularly discloses a method for detecting the content of protein in a 3D-MLA adjuvant, which comprises the following steps: (1) preparing a test solution: firstly dissolving the 3D-MLA adjuvant by using a hydrochloric acid solution, performing 300-600W ultrasonic treatment for 2-5min, centrifuging 10000-13000g for 4-7min, and taking supernate; adding a compound enzyme into the supernate for enzymolysis; then adding concentrated hydrochloric acid, uniformly mixing, hydrolyzing for 20 + / -2 hours in a nitrogen atmosphere at 105-115 DEG C, blow-drying, and dissolving with a hydrochloric acid solution to obtain a test sample stock solution; adding a derivatization reagent into the test sample stock solution, and carrying out derivatization treatment, extraction and dilution to obtain a test sample solution; and (2) high performance liquid chromatography determination. According to the detection method provided by the invention, the residual quantity of the host cell protein in the 3D-MLA can be rapidly and accurately determined, and the quality control of the 3D-MLA is realized.
Owner:BEIJING HUANUOTAI BIOMEDICAL TECH CO LTD

Wafer cleaning device based on ultrasonic cleaning

The invention discloses a wafer cleaning device based on ultrasonic cleaning, and relates to the technical field of wafer cleaning devices. Comprising a cleaning machine outer tank body, a wafer cleaning glass tank, an ultrasonic cleaning tank, an ultrasonic device, a bottom plate, a housing, a cleaning tank rail, a flow dividing water supply device and a bubble removing uniform vibration device, ultrapure water serves as a medium, ultrasonic vibration is effectively conducted to the wafer cleaning glass tank, a strong acid solution in the tank is driven to uniformly vibrate, and efficient cleaning of wafers is achieved. High turbulence pulsation and local shearing stress are formed at the junction of oblique water replenishing and the stock solution, large bubbles are sheared into small bubbles, bubble gathering is prevented, and the liquid purity and the ultrasonic cleaning efficiency are improved. Under the centrifugal separation action of the rotational flow connecting base and the annular rotational flow piece, bubbles in water flow are concentrated in the center position, ultrapure water on the outer side is rapidly discharged, the bubbles are efficiently absorbed after making contact with the hydrophobic porous membrane, and the bubble removing effect is remarkably improved.
Owner:HANGLING MICRO (TAIZHOU) TECH CO LTD

CAD detection method for phosphoric acid and phosphorous acid in alendronate sodium oral solution

The invention discloses a CAD detection method for phosphoric acid and phosphorous acid in an alendronate sodium oral solution, and belongs to the technical field of pharmaceutical analysis. The method comprises the following steps: preparing a reference stock solution and a test solution; then setting high performance liquid chromatography detection conditions; a Shodex VN-504D chromatographic column is adopted, a CAD detector is adopted as a detector, a mixed solution of a mobile phase A and a mobile phase B is adopted as a mobile phase, the mobile phase A is ammonium formate, the mobile phase B is an acetonitrile solution, and gradient elution is performed by adopting the mobile phase; and respectively measuring the reference stock solution and the test solution, injecting into a liquid chromatograph, and recording a chromatogram. A CAD detector is adopted, the detection sensitivity is obviously improved, the quantitative concentration can reach 0.24 mu g / mL, and the detection concentration can reach 0.10 mu g / mL. The method is high in specificity, high in sensitivity, good in durability, rapid, simple, effective and reliable.
Owner:南京联智医药科技有限公司

Conditioner group for improving grain quality and rice quality of direct seeding rice as well as preparation method and use method of conditioner group

PendingCN121264482ABiocidePlant growth regulatorsPhotosynthetic productionVolumetric flask
The invention relates to the field of plant growth regulators, in particular to a conditioner group for improving the grain quality and the rice quality of direct seeding rice and a preparation and use method thereof.The preparation method of a conditioner in the initial heading stage comprises the following steps that 1, 6-benayl aminopurine is dissolved in a diluted hydrochloric acid solution in a assisted mode, and a 6-benayl aminopurine solution is obtained; step 2, adding choline chloride into the solution obtained in the step 1, stirring to obtain a mixed solution, transferring the mixed solution into a volumetric flask, and adjusting the pH value; 3, abscisic acid powder is dissolved with absolute ethyl alcohol, volume metering is carried out after dissolution to form a stock solution, and then PH adjustment is carried out. Two conditioners are included and sprayed in the initial heading stage and the full heading stage respectively, glumous flower degeneration can be reduced, the photosynthetic production capacity of the upper three leaves after flowering can be improved, assimilation substances are promoted to be transferred to grains, especially the filling state of vulnerable grains is improved, and the yield of the seedlings is increased. Finally, the grain number, the maturing rate, the grain weight and the yield are improved, meanwhile, the head rice rate of rice can be improved, and the protein content is reduced, so that the palatability of rice is improved.
Owner:JIANGSU XUHUAI DISTRICT HUAIYIN AGRI SCI RES INST

Detection kit and detection method for juvenile depression marker

PendingCN121114296AComponent separationStable Isotope LabelingDisease
The invention belongs to the technical field of teenager depression marker detection, and particularly relates to a teenager depression marker detection kit and a teenager depression marker detection method, the kit comprises an extraction liquid, an internal standard substance, a quality control substance and a mobile phase additive, the internal standard substance comprises a stable isotope labeled metabolic marker, the quality control substance comprises a standard metabolic marker, and the mobile phase additive comprises a mobile phase. The detection method comprises the following steps: S1, dissolving an internal standard substance by using a methanol-containing aqueous solution to prepare an internal standard stock solution; s2, methanol is added into the internal standard stock solution for dilution, uniform mixing is performed, and an extraction working solution is prepared; s3, taking a quality control product / sample, adding an extraction working solution, carrying out oscillation incubation, centrifuging, and taking supernate as a to-be-detected sample; s4, the sample to be detected is detected through a liquid chromatograph-mass spectrometer, various biomarkers related to depression in the body of the teenager can be rapidly and accurately detected, and an objective and reliable basis is provided for early diagnosis and illness state evaluation of the depression of the teenager.
Owner:CHONGQING PUJI LIFE TECH CO LTD

Skin repair dressing stock solution mixing equipment

The utility model relates to the technical field of skin repair, and discloses skin repair dressing stock solution mixing equipment which comprises a frame, the top of the frame is fixedly connected with a mixing bin, one side of the mixing bin is provided with a rotating hole, one side of the top of the frame is fixedly connected with a steering gear, and the steering gear is connected with a transmission rod through a spline. According to the skin repair dressing stock solution mixing equipment, through the arrangement of the mixing bin, the steering gear, the rotating shaft, the multi-rod stirrer and the auxiliary stirring rod, when the equipment needs to mix stock solutions to be mixed, a driving motor is started to enable the rotating shaft to rotate; the multi-rod stirrer and the auxiliary stirring rod are driven by the rotation of the rotating shaft to rotate so as to stir and mix the stock solution, so that the equipment can fully mix the stock solution, and the problems that the stirring kinetic energy deviation of the equipment possibly occurs when the equipment is used, the stock solution mixing effect is insufficient and incomplete, and the use effect is poor are effectively avoided.
Owner:HUNAN NAN PHARMACEUTICAL BIOTECHNOLOGY CO LTD

Beer filtering device applying cross-flow filtering technology

The utility model relates to a beer filtering device applying a cross-flow filtering technology, which comprises a base, a stock solution tank is fixedly mounted at the top of the base, a storage tank is fixedly mounted at the top of the base, and a filtering mechanism is arranged at the top of the base. According to the beer filtering device applying the cross-flow filtering technology, when beer needs to be filtered, firstly, a controller drives a booster pump outside a first water inlet pipe to be started, at the moment, the beer liquid enters a first filtering tank through the first water inlet pipe, and at the moment, a first filtering membrane group can roughly filter the beer through a porous supporting layer, a transition layer and a separation layer; at the moment, part of the fermented beer liquid flows through the upper end of the first filtering membrane group under the action of flow shearing force, the electromagnetic valve is started, enters the return pipe from the first shunt pipe and returns to the stock solution tank through the return pipe, the rest of the beer liquid enters the second filtering tank through the second water inlet pipe, and the secondarily filtered beer liquid enters the storage tank through the guide pipe, so that filtering is completed.
Owner:ANHEUSER-BUSCH INBEV (TAIZHOU) BREWERY CO LTD +1

Method for determining anthracene and phenanthrene oxides and polycyclic aromatic hydrocarbon pollutants in tea leaves

The invention discloses a method for determining anthracene and phenanthrene oxides and polycyclic aromatic hydrocarbon pollutants in tea leaves, and belongs to the technical field of tea leaf component determination, by using the method, whether a tea leaf sample contains anthraquinone, phenanthrenequinone, multiple polycyclic aromatic hydrocarbons and other pollutants can be accurately determined at the same time, and quantitative analysis can be performed. The method has the characteristics of high detection efficiency, accurate analysis result and good repeatability; comprising the following steps: S1, respectively taking reference substances to prepare reference substance stock solutions with different numbers, taking a blank tea reference substance, and carrying out extraction, magnetic separation, extraction and elution to obtain a blank matrix extracting solution; s2, taking each reference substance stock solution, respectively preparing reference substance solutions with different numbers by using a blank matrix extracting solution, and sequentially putting the reference substance solutions into a gas chromatograph-tandem time-of-flight mass spectrometer for determination to obtain spectrum information of each reference substance; and S3, collecting data information of each reference substance from the map information of each reference substance, and then establishing a comparison database.
Owner:WUZHOU INST FOR FOOD & DRUG CONTROL

A north fruit tree late spring cold injury freeze-proofing fluid and a preparation and application method thereof

PendingCN122642414AFruit treeGrowth plant
The application discloses a kind of north fruit tree spring frost injury freeze protection fluid and its preparation and application method, the freeze protection fluid is by plant growth regulator, saccharide, amino acid component, mineral nutrient component, boric acid and film-forming protective component and water compound, each raw material is mixed uniformly according to defined mass fraction ratio. When using, stock solution dilution 300-700 times, 24-72h before frost, it is suitable for cherry, apple, pear, apricot and other north fruit tree flowering freeze protection. The application has multiple effects of freeze protection, membrane stabilization, repair and nutrient supplementation, can maximize protect cell integrity and reduce irreversible necrosis at low temperature. Even if suffering from low temperature freeze injury, the flower organ is less damaged after spraying the freeze protection fluid, and recovers quickly.
Owner:STATE-OWNED GUSHAN FOREST FARM DAIYUE DISTRICT TAIAN CITY

Water production apparatus

The present invention addresses the problem of providing a water production apparatus which is capable of efficiently and accurately producing target water that contains an additive such as a mineral component. A water production apparatus 1 comprises: an additive starting material storage tank 51 for storing an additive starting material for preparing an additive on the basis of specification information on specific target water; an additive stock solution storage tank 53 for storing an additive stock solution that is obtained by dissolving the additive starting material into raw water; an additive stock solution preparation information generation unit 32 for generating additive stock solution preparation information for preparing the additive stock solution by dissolving (mixing) the additive starting material in the raw water on the basis of the specification information; and an additive stock solution preparation unit 33 for dissolving the additive starting material stored in the additive starting material storage tank 51 into the raw water on the basis of the additive stock solution preparation information so as to prepare the additive stock solution and storing the additive stock solution in the additive stock solution storage tank 53.
Owner:AQUONIA INC

Advanced treatment device for urea dust recovery liquid

The utility model relates to an advanced treatment device for urea dust recovery liquid. Comprising a stock solution tank, the stock solution tank is connected with a multi-stage filtering unit through a high-pressure pump, a clear liquid outlet of the multi-stage filtering unit is connected with a urea production system, and a concentrated liquid outlet of the multi-stage filtering unit is connected with a sewage treatment system; the method has the characteristics that resources can be recycled, and the treatment load of a sewage treatment system can be reduced.
Owner:HENAN XINLIANXIN FERTILIZER

Potassium permanganate solution batching system, use method thereof and system controller

The invention discloses a potassium permanganate solution batching system, a use method thereof and a system controller, and belongs to the technical field of jeans production equipment. The batching system comprises a stock solution preparation module, a formula batching module and a monkey wash module. The stock solution preparation module comprises a stock solution preparation tank and a stock solution tank; the stock solution preparation tank is used for preparing a potassium permanganate solution with a preset concentration and discharging and storing the potassium permanganate solution into the stock solution tank; the formula batching module comprises a formula premixing tank and a liquid outlet pipeline, the formula premixing tank is connected with the stock solution tank and the liquid outlet pipeline, and the formula premixing tank is used for diluting the solution and discharging the diluted solution through the liquid outlet pipeline. And the monkey wash module comprises a monkey wash premixing tank and a monkey wash liquid storage tank which are connected in sequence. And the monkey wash premixing tank is used for diluting the potassium permanganate solution in the stock solution tank and conveying the diluted potassium permanganate solution to the monkey wash solution storage tank. According to the potassium permanganate solution batching system disclosed by the invention, a stock solution with stable concentration and uniform property is prepared by accurately controlling the proportion of raw materials, so that the accuracy of a subsequent diluent and a gradient concentration solution is ensured from the source.
Owner:GUANGZHOU XIAOHAI ELECTRONICS PROD

Temperature control method and system based on snail stock solution separation process

The invention relates to the technical field of temperature control based on a specific process, and discloses a temperature control method and system based on a snail stock solution separation process, and the method comprises the steps: monitoring the temperature data of each key device in the snail stock solution separation process in real time, and carrying out the preprocessing and feature extraction; a temperature control instruction is generated through a PID control algorithm and is adjusted by the PLC, the operation state of the system is monitored in real time, fault alarm is carried out, the operation process of the system is recorded, and a report record is generated and visually displayed. Through multi-dimensional temperature monitoring, a complete system architecture, a customized solution and visual display, the precision and efficiency of temperature control are remarkably improved, the stability of a snail stock solution separation process and the product quality are ensured, and an efficient and reliable temperature control technical scheme is provided for related industries.
Owner:TIANJIN MEILIN TECHNOLOGY CO LTD

Stock solution clarifying device for vinegar production

The utility model relates to the technical field of vinegar production, and discloses a stock solution clarification device for vinegar production, which comprises a clarification tank, a material collecting box is arranged at the top of the clarification tank, a rotating shaft is rotatably connected between the front surface and the back surface of the inner wall of the material collecting box, and a plurality of partition plates are fixedly connected to the outer surface of the rotating shaft. And the two ends of the rotating shaft rotationally penetrate through the material collecting box. After the motor II is started to drive the rotating shaft, the plurality of partition plates and the two cams to rotate, granulated sugar added into the material collecting box can be vibrated and is prevented from being adhered to the inner wall of the material collecting box, and intermittent blanking is performed after the granulated sugar is uniformly distributed into the material collecting box, so that the granulated sugar can be uniformly added into the clarification tank; the subsequent stirring and mixing efficiency is improved, and meanwhile, the problems that part of granulated sugar is wasted, the quality of vinegar after being subsequently fused with the granulated sugar is reduced and the working environment is polluted due to the fact that the vinegar is easy to fly to the outside of the clarification tank in a manner of uniformly blanking by beating are avoided.
Owner:ANHUI BAIWEISHOU FOOD TECHNOLOGY CO LTD

Enzyme preparation stock solution screening and filtering mechanism

The utility model relates to an enzymic preparation stock solution screening and filtering mechanism, which belongs to the technical field of enzymic preparation stock solution screening and filtering and comprises a box body, the top of the box body is of an opening structure, the inner bottom wall of the box body is in an inward inclined state, and a fixing plate is fixedly mounted on the inner wall of the box body. A water outlet is annularly formed in the surface of the fixing plate, a filter screen is fixedly mounted on the inner wall of the water outlet, a cleaning assembly for cleaning the surface of the filter screen is arranged in the box body, and the cleaning assembly comprises a driving part arranged on the lower surface of the box body. According to the enzyme preparation stock solution screening and filtering mechanism, by arranging the cleaning assembly, a scraping plate can scrape impurities accumulated on the surface of the filtering net, so that the impurities are in a flowing state above the filtering net, the impurities are difficult to accumulate on the surface of the filtering net for a long time, and the problems that the impurities are easy to accumulate on the surface of the filtering net and the filtering effect is poor are solved. And therefore, the practicability of the filter screen disclosed by the utility model is improved.
Owner:ZHONGNUO BIOTECHNOLOGY DEV JIANGSU CO LTD

Method for screening key neurotoxic substances in food raw materials and their products by combining caenorhabditis elegans model with metabolomics

PendingCN122345603ABiotechnologyFood material
This invention discloses a method for screening key neurotoxic substances in food raw materials and their products using a *C. elegans* model combined with metabolomics. Food samples are processed to prepare a stock solution, which is then used to cultivate *C. elegans*. The sample exhibiting the greatest neurotoxicity to the nematodes is identified by analyzing the number of *C. elegans* movements and neuronal fluorescence images. Subsequently, key neurotoxic substances in food are systematically screened using a combination of non-targeted liquid chromatography-tandem mass spectrometry (LC-MS / MS) and a metabolomics platform. This application establishes a novel method for screening neurotoxic substances by combining nematode activity with non-targeted LC-MS / MS determination and a non-targeted metabolic platform, clarifying key neurotoxic substances in food and providing a theoretical basis for food quality control and high-quality development.
Owner:SOUTH CHINA AGRICULTURAL UNIVERSITY

Burning device for praseodymium neodymium oxide preparation stock solution

The utility model provides a praseodymium neodymium oxide preparation stock solution firing device, which belongs to the technical field of praseodymium neodymium oxide preparation, and comprises a conveyor belt and a firing furnace, the front surface of the conveyor belt is fixedly connected with the firing furnace, the back surface of the firing furnace is connected with a baffle plate in an embedded manner, the top of the firing furnace is fixedly connected with a servo screw rod, and the servo screw rod is fixedly connected with a motor. The output end of the servo lead screw is fixedly connected with a transmission plate, and the inner side of the firing furnace is fixedly connected with an electric heating pipe. The ventilating fan, the water tank, the conveying pump and the output head are additionally arranged through the fixing frame, the ventilating fan conveys air to the outer surface of the container, the air flow speed of the surface of the container is increased, primary cooling is conducted on stock solution in the container, meanwhile, the conveying pump generates suction force on water in the water tank, and the water is conveyed into the output head; at the moment, the output head atomizes and conveys the water to the outer surface of the container, and further cooling of the stock solution and the container is completed.
Owner:JIANGSU GUOYUAN RARE EARTH NEW MATERIALS CO LTD

Fertilizer bottle (seaweed mineral source of potassium phosphate concentrate stock solution)

1.The name of the design product: fertilizer bottle (seaweed mineral source potassium phosphate concentrate stock solution). 2.The use of the design product: the design product is used for packaging fertilizer bottles. 3.The design points of the design product: the combination of shape, pattern and color. 4.The picture or photo that best indicates the design points: front view. 5.The design for which protection is sought contains color.
Owner:PUMEISI IMPORT & EXPORT TRADING (WEIFANG) CO LTD

Dynamic scheduling method for autonomous navigation type cross-regional transfer of acid barrels

The invention relates to a dynamic scheduling method for autonomous navigation type cross-regional transfer of a chemical stock solution, and belongs to the technical field of semiconductor industry and FAB factory material transfer. The method comprises the following steps: acquiring an acid barrel cross-region transfer request, and analyzing acid barrel characteristic parameters and target region information in the request; constructing a transportation task model for the acid barrel, wherein the transportation task model outputs a safety priority for scheduling and sorting and a dynamic comprehensive constraint set for path planning; distributing the task to a scheduling queue according to the security priority; based on the security priority and the dynamic comprehensive constraint set, matching an autonomous navigation carrying AGV for the task; planning an initial transfer path for the matched AGV; and in the task execution process of the AGV, the state of the acid barrel and the operation environment of the AGV are monitored in real time, and a path is dynamically adjusted or a safety emergency mechanism is triggered based on the dynamic comprehensive constraint set until the acid barrel safely reaches the target area. And efficient, safe and intelligent management of the acid barrel in the cross-region transfer process is realized.
Owner:SHANGHAI YIDING ELECTRONIC SYST INTEGRATION CO LTD

High-activity green detergent, and preparation method and application thereof

The application discloses a kind of high-activity green cleaning agent, its preparation method and application, the high-activity green cleaning agent includes stock solution and diluent liquid;The stock solution is formed by esterification reaction by mixing and heating 2-ethylhexyl phosphate and hydroxyethylidene diphosphonic acid according to weight ratio 1.8-3:1;And / or the stock solution includes 2-ethylhexanol, phosphite, acetic acid-2-ethylhexyl ester, polyisobutylene succinic anhydride and ethylhexyl phosphate;The diluent liquid is formed by mixing according to weight ratio 1:4-3:7 by content >99% formaldehyde and oligomeric water cluster;The weight percentage of the stock solution is 0.8%-1.3%.The application also discloses fuel containing the above-mentioned high-activity green cleaning agent.The high-activity green cleaning agent of the application is a pure petroleum product, is a new type of fuel modifier, by changing the physical properties of fuel to achieve its synergistic effect, oil saving, carbon cleaning, emission reduction effect, suitable for popularization and application.
Owner:BEIJING RANDING ENERGY TECHNOLOGY CO LTD

Composition, stock solution, method for manufacturing cleaned object to be treated, and method for manufacturing electronic device

The present invention provides: a composition that has excellent residue removability, maintains excellent residue removability even after long-term storage, and has low deterioration of CMP treatment polishing speed when used in cleaning processing involving repeated treatment by CMP treatment followed by cleaning treatment using a pad; methods for manufacturing a stock solution and a cleaned object to be treated; and a method for manufacturing an electronic device. This composition is a composition for use in cleaning, using a pad, an object to be treated that has been subjected to chemical mechanical polishing, wherein: the composition includes a compound that has a polyoxyalkylene chain and does not have an acidic group, a basic group, or any salt of said groups, and an antimicrobial agent; the content of the compound with respect to the total mass of the composition is 0.3–5.0% by mass; and the mass ratio of the content of the compound to the content of the antimicrobial agent is 5–10,000.
Owner:FUJIFILM CORP +1

Oil red O modified coupling coloring agent and method for dyeing frozen section by using oil red O modified coupling coloring agent

The invention belongs to the technical field of biology, and particularly relates to an oil red O modified coupling coloring agent and a frozen section dyeing method thereof. The oil red O modified coupling coloring agent comprises a carboxylated oil red O stock solution, a coupling agent, a buffer solution and Triton X-100, the carboxylated oil red O stock solution is modified through succinic anhydride, EDC and NHS, oil red O can be converted into a specific molecular dye from a hydrophobicity-dependent similar-dissolvable non-specific physical dye, lipid molecules are actively combined, and the specific molecular dye is converted into the specific molecular dye. And different types of lipid molecules are dyed, other cell structures are not adhered, and a non-specific background is eliminated, so that weak signals such as tiny lipid droplets, cell membrane lipid and the like can be clearly dyed and captured, and the imaging quality and the accuracy of quantitative analysis are improved.
Owner:HANGZHOU HUANTE BIOLOGICAL TECH CO LTD

Medicinal material stock solution extraction device

The utility model discloses a medicinal material stock solution extraction device, which relates to the technical field of medicinal material stock solution extraction and comprises a filter box and a base arranged at the bottom of the filter box, a filter screen cylinder is rotatably arranged in the filter box, and a driving component is arranged at the bottom of the filter box; the supporting plate is mounted on the outer wall of the filter box, and a scraping assembly is arranged on the supporting plate; the liquid outlet groove is formed in the inner bottom surface of the filter box, and a liquid outlet pipe is arranged at the bottom of the liquid outlet groove; through the use of the driving assembly, the filter screen cylinder is convenient to rotate, so that the centrifugal separation of the medicinal material stock solution is realized, and the working efficiency of extracting the medicinal material stock solution is improved; and through the use of the scraping assembly, the inner wall of the filter screen cylinder is conveniently scraped, and meshes of the filter screen cylinder are prevented from being blocked, so that the filtration of the medicinal material stock solution is facilitated, and the extraction of the medicinal material stock solution is further facilitated.
Owner:XINJIANG HUACHUN BIOLOGICAL PHARMACEUTICAL CO LTD

Medicament dispensing device

The invention relates to a medicine dispensing device. Comprising a subpackaging assembly, a diluting assembly and a controller, the split charging assembly is arranged in the shielding body cavity, the split charging assembly comprises a stock solution frame, a first metering device, a split charging frame, a second metering device, an activity detection mechanism and an electric suction pump, and the activity detection mechanism can measure the activity of liquid in a stock solution container placed in the shielding body cavity and the activity of liquid in a split charging container; the electric suction pump can be used for extracting the stock solution in the stock solution container and sub-packaging the stock solution into the sub-packaging container; the dilution assembly comprises a diluent frame, a third meter, a dilution pipeline and a first valve, the first end of the dilution pipeline can be communicated with an opening of a diluent container arranged on the diluent frame, the second end of the dilution pipeline is communicated with the subpackaging assembly, and the first valve is installed on the dilution pipeline; the controller is in communication connection with the subpackaging assembly and the diluting assembly. The device is high in split charging precision and can be used in any place.
Owner:BEIJING TSINGHUA CHANGGUNG HOSPITAL

An analysis method of non-volatile organic acids in electronic cigarette liquid

The application discloses an analysis method of non-volatile organic acids in electronic cigarette liquid, comprising the following steps: adding a to-be-tested sample of electronic cigarette liquid into an internal standard stock solution and a formic acid-methanol aqueous solution, sealing and oscillating, diluting with an internal standard solution to obtain a to-be-tested sample solution; mixing single standard stock solutions prepared by different target standard samples, diluting into a mixed standard intermediate solution, taking different volumes of the mixed standard intermediate solution, adding an internal standard stock solution and a formic acid-methanol aqueous solution, and configuring into standard working solutions with different concentrations; respectively performing ultra-high performance liquid chromatography-tandem mass spectrometry analysis on the to-be-tested sample solution and the standard working solution; and according to the analysis result, the content of the target in the to-be-tested sample is calculated by using an internal standard standard curve method. The application can realize simultaneous analysis and chromatographic separation of six non-volatile organic acids in electronic cigarette liquid, has the advantages of accurate quantification, high flux, good separation degree, simple operation, high sensitivity, good recovery rate and good repeatability, etc.
Owner:CHINA TOBACCO ZHEJIANG IND CO LTD

Cutting fluid supply control method, controller and machining equipment

The invention relates to a cutting fluid supply control method, a controller and machining equipment, and belongs to the technical field of machining equipment. The cutting fluid supply control method is applied to machining equipment with a fluid supply device and comprises the steps that the reference concentration range, the reference pH value range and the cutting fluid demand quantity of cutting fluid corresponding to a to-be-conducted machining procedure are obtained; the current concentration value, the current pH value and the current inventory of the cutting fluid in the fluid supply device are obtained; determining a first supplementation amount calculation value range and a second supplementation amount calculation value range according to factors such as the reference concentration range and the reference pH value range; finally determining the supplement amount according to the first supplement amount calculation value range and the second supplement amount calculation value range; and the liquid supply device is controlled to supplement the cutting fluid stock solution and the diluent. By means of the control method, the concentration value and the pH value of the cutting fluid are expected to be kept within the expected numerical range.
Owner:GENESIS IND EQUIPMENT (ZHEJIANG) CO LTD

An on-line double-gradient pre-concentration detection method for heavy metal ions in soil based on microchip electrophoresis non-contact conductivity detection

The application discloses a kind of on-line double-gradient pre-concentration detection methods of soil heavy metal ions based on microchip electrophoresis non-contact conductivity detection, including preparation of the analyte sample to be measured, preparation of high concentration buffer as background buffer, preparation of microchip, microchip electrophoresis process and the like steps.When testing, the background buffer contains 2-(N-morpholinyl)ethanesulfonic acid, L-histidine and electroosmotic flow inhibitor;The analyte sample to be measured contains sample matrix liquid and sample extraction stock solution.Among them, the sample matrix liquid is low-concentration buffer, and glacial acetic acid is used to reduce pH value.In testing, due to the existence of concentration gradient and pH gradient between the analyte sample solution to be measured and the background buffer, the ions to be measured in the sample will slow down and accumulate at the contact surface of the two during migration, realizing on-line pre-concentration, and improving the detection sensitivity of the ions to be measured.The application greatly improves the separation degree of multiple heavy metal ions, and effectively improves the detection sensitivity of heavy metal ions.
Owner:GUANGXI UNIV

A natural gas hydrate recovery apparatus and method

PendingCN122381854AProcess engineeringChiller
The application provides a natural gas hydrate recovery device and method. The natural gas hydrate recovery device comprises a premixing device, a booster pump, a stepped reaction device and a separation device. The premixing device is used for mixing and treating a gaseous natural gas source and a working liquid stock solution to form a gas-liquid premix. The inlet of the booster pump is communicated with the outlet of the premixing device, and the booster pump is used for boosting the gas-liquid premix to form a high-pressure premix. Through the path of mixing first and then boosting, the working liquid synchronously absorbs the compression heat in the boosting process, thereby avoiding the series high-energy consumption unit of the compressor and the cooler in the traditional process, reducing the total energy consumption of the system, and simultaneously, the integration of the process simplifies the equipment composition.
Owner:中国石油大学(北京)克拉玛依校区

Concentration equipment for producing plant stock solution

The utility model relates to liquid concentration, and particularly discloses concentration equipment for producing a plant stock solution, which comprises a concentration tank, a cover body arranged at the upper end of the concentration tank, a pair of partition devices vertically arranged in the concentration tank, a heating device arranged in the concentration tank and a condensing device connected with the concentration tank, the separation device is used for separating the concentration tank into a first chamber and a pair of second chambers which are respectively positioned on two sides of the first chamber; the upper end and the lower end of the first chamber are communicated with the second chamber; and an air supply device is arranged in the first cavity. According to the concentration equipment for producing the plant stock solution, disclosed by the utility model, the efficient stirring and uniform heating of liquid can be ensured, the use of a stirring device can be reduced, and the cleaning difficulty is reduced.
Owner:SICHUAN ZHIBEN BIOENG CO LTD

Packaging box (ProtYouth single throw)

ActiveCN309865870SCollagenanStock solution
1. The name of the design product: packaging box (ProtYouth single pack). 2. The use of the design product: packaging box for single component collagen stock solution. 3. The design points of the design product: the combination of shape, pattern and color. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. The design for which protection is sought includes color. 6. Design 1 is designated as the basic design.
Owner:BEIJING WULING BIOTECHNOLOGY CO LTD