690 results about "Chemical substance" patented technology

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) detection, and particularly relates to an Ag-MoO2 composite SERS substrate as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing Ag nanoparticles which are uniformly distributed and have the same size by a sodium citrate reduction method; secondly, a MoO2 material is prepared through a hydrothermal method; and finally, the novel SERS substrate Ag-MoO2 is prepared through a physical stirring method. According to the invention, the novel SERS substrate made of Ag nanoparticles and MoO2 materials is constructed, which is different from the conventional SERS substrate made of independent Ag nanoparticles, and can detect stronger intrinsic Raman signals of probe molecules. As the SERS substrate needs to be compounded with a MoO2 material during preparation, a charge transfer phenomenon can occur at an interface where the SERS substrate is in contact with probe molecules, so that intrinsic Raman signals of the probe molecules can be enhanced, and the SERS substrate can be better used for detecting and analyzing chemical substances.

The invention relates to the technical field of water quality detection, in particular to a water quality total chlorine detection method and system.The method comprises the steps that firstly, the influence of environmental conditions on a chromogenic reaction is considered, and the environmental interference degree is determined through the temperature influence degree representing the overall temperature fluctuation change and the pH value influence degree representing the overall pH value standard deviation condition; then determining the chemical interference degree by characterizing the wavelength standard deviation and width of the maximum absorption peak which interferes with the influence of chemical substances and deviates and the number of redundant absorption peaks according to the influence of chemical conditions on the chromogenic reaction; determining a historical measurement error of the water quality total chlorine detector through a control variable method; the corrected water quality total chlorine concentration obtained by correcting the initial water quality total chlorine concentration by means of the environmental interference degree, the chemical interference degree and the measurement error is more accurate, and the accuracy of water quality total chlorine detection according to the obtained water quality total chlorine concentration is higher.

A device and method for delivering biological material and / or synthetic chemistries to a liquid medium comprising securing a capsule to an opening of a container, the capsule comprising a cap portion for securing the capsule to the container and an elongate portion comprising a cavity defined by a frangible bottom, wherein the cavity comprises live biological material therein and a plunger comprising a disrupting mechanism, suspending the elongate portion of the capsule into an interior cavity of the container, depressing the plunger, cutting or disrupting the frangible bottom of the capsule, and releasing the material into the liquid medium.

The present disclosure provides a method for simulating the environmental exposure concentration of chemical substances in lakes that meets the scale of a watershed, including: dividing the lake into regions according to a division rule to obtain multiple partitions, and recording the geometric parameters of each partition, the division rule including a first rule that the only water outlet and the water inlet of the lake are divided into different partitions and a second rule that the regional division meets the needs of chemical substance concentration management; calculating the calculated water flow rate between each partition on the same day and the calculated water outflow rate of the water outflow partition based on the daily hydrological data from the watershed hydrological model, the estimated value of the water level of each partition and the geometric parameters; optimizing and adjusting the partition by adjusting the water level or volume of the partition based on an optimization index, the optimization index including a first index related to the calculated water outflow rate of the water outflow partition on the same day and a second index related to the water flow rate between each partition on the same day; calculating the daily chemical concentration of the adjusted partition based on the chemical substance data from the watershed hydrological model.

The invention relates to the technical field of high polymer materials, and discloses a preparation method and application of polystyrene-divinyl benzene composite microspheres, and an environment-friendly solvent system, such as a water-based or non-toxic organic solvent, is adopted to replace a traditional organic solvent. The solvent pollution risk can be reduced by using water-phase emulsion polymerization, meanwhile, the recovery and treatment of the solvent are simplified, the surfactant is optimized, the low-toxicity and environment-friendly surfactant is selected for emulsion stabilization, and chemical substances harmful to the environment and the human body are prevented from being used. By optimizing a polymerization process, accurately controlling the crosslinking degree and introducing a green solvent and an environment-friendly surface modification method, the improved polystyrene-divinyl benzene composite microsphere overcomes some defects (such as high cost, non-uniform particle size, difficulty in controlling the crosslinking degree and the like) in the prior art; in addition, the method has wider application potential in a plurality of fields (such as coatings, medicines and catalysis), and has better environmental protection property, health safety and the like.

The invention discloses a rare and endangered organism toxicity prediction method based on a machine learning algorithm and a quantitative structure-activity relationship, which constructs a toxicity prediction model through the machine learning algorithm, can effectively assess the toxicity influence of environmental pollutants on rare and endangered organisms, and provides technical support for rare and endangered organism protection and ecological environment risk assessment. Comprising the following steps: 1, collecting data related to rare and endangered organisms from a public database, and establishing a rare and endangered organism toxicity prediction database based on machine learning; 2, generating molecular descriptors for the chemical substances; step 3, data preprocessing; 4, development of acute and chronic toxicity prediction models of rare and endangered organisms based on multiple machine learning is carried out, and performance evaluation is carried out; 5, performing internal and external verification on the rare and endangered biotoxicity prediction model; step 6, analyzing the importance of the features by using the valuable, rare and endangered biotoxicity prediction model, and finding out the most influential features; and 7, predicting the toxicity value of the pollutants in combination with the optimal machine learning model.

Disclosed herein are a membrane suitable for separation of chemical species, the membrane comprising a ceramic substrate having a first surface and a second surface, an anchoring chemical layer on the first surface of the ceramic substrate, and a covalent organic framework (COF) layer on the anchoring chemical layer, and a method of using the membrane in a process of separating a first organic compound from a second organic compound. Also disclosed herein are a method of forming a membrane suitable for separation of chemical species, and a device to manufacture a membrane suitable for separation of chemical species.

An automated chemical formulation apparatus includes: a data reception unit that receives an input chemical material dataset including chemical material information, chemical composition information, chemical formulation information and property information thereof; a predicting model generation unit that trains a first machine learning model using the input chemical material dataset to generate a predicting model for predicting a chemical formulation based on target property information of a target material; and a formulation prediction unit that sets a boundary condition based on the input chemical material dataset, generates a new input dataset including at least one of chemical material information, chemical composition information, and chemical formulation information within the boundary condition, inputs the new input dataset to the predicting model, and sets predetermined one or more pieces of target property information to perform prediction, thereby outputting a first group of chemical formulation data.

The invention relates to a functional gene abundance-based river nitrogen concentration simulation method, which comprises the following steps of: 1, determining a nitrogen conversion process related to a model according to environmental condition characteristics of a river; 2, determining functional genes and chemical substances involved in the model according to the selected nitrogen conversion process, and obtaining the abundance of the involved functional genes and the concentration of the chemical substances through on-site sampling and monitoring; and step 3, combining the functional gene abundance change equation and the chemical substance concentration change equation, inputting the functional gene abundance and the chemical substance concentration obtained in the step 2 into the equations, and calculating nitrogen concentrations in different spaces and time so as to simulate the nitrogen concentration of the river. According to the method, the mathematical model of the river nitrogen conversion process is constructed through the microbial metabolism reaction mechanism, and compared with a traditional water environment model, the distribution characteristics of nitrogen can be more accurately simulated, and the change rule can be predicted.

The invention provides a lake chemical substance environmental exposure concentration simulation method meeting the watershed scale, which comprises the following steps: carrying out regional division on a lake according to a division rule to obtain a plurality of subareas, and recording geometric parameters of each subarea, the division rules comprise a first rule for dividing a unique water outlet of the lake and a water inlet of the lake into different zones and a second rule for dividing the zones according with chemical substance concentration management requirements; according to hydrological data of the current day from the watershed hydrological model, the estimated value of the water level of each subarea and the geometric parameters, calculating a water flow calculation value between the subareas and a water outlet flow calculation value of the water outlet subarea on the current day; based on optimization indexes, the partitions are optimized and adjusted by adjusting the water levels or volumes of the partitions, and the optimization indexes comprise a first index related to the calculated value of the water outlet flow of the water outlet partition on the current day and a second index related to the water flow of the partitions on the current day; and according to chemical substance data from a watershed hydrological model, calculating the intraday chemical substance concentration of the adjusted subarea.

The invention provides an efficient goods sorting device for logistics, and relates to the technical field of logistics sorting devices.The efficient goods sorting device for logistics comprises a first sorting frame 1, a second sorting frame 2, an adjusting device 5 and a transferring mechanism 6, the first sorting frame 1 is located under the second sorting frame 2, and a plurality of goods boxes 3 are arranged on the surface of the first sorting frame 1 and the surface of the second sorting frame 2; the surface of the end, close to the second sorting frame 2, of the first sorting frame 1 is fixedly connected with a regulation and control frame 4, and the size of the inner wall of the regulation and control frame 4 is matched with the sectional size of the container 3. The system solves the problems that in logistics system management, a large number of material containers are sorted and conveyed, in the process, due to the fact that the containers are in contact with various objects and environments in the transportation process, the surfaces of the containers are prone to being stained with dust, dirt and chemical substances, at the moment, bar codes and order codes on the surfaces of the containers are fuzzy, and the sorting and conveying efficiency is high. And the problem that the containers are inconvenient to sort and transport due to the fact that the containers cannot be recognized is solved.

The present invention addresses the problem of how to effectively and efficiently extract, separate, and recover high-concentration PFAS contained in water regardless of the type of PFAS. An organic fluorine compound is converted to a chemical species having a negative charge on the basis of ionization by acid dissociation of the organic fluorine compound, molecularization of protonation-type hydrophobic cations, or both of these items, the distribution of the organic fluorine compound to an aqueous phase is promoted, and the organic fluorine compound is recovered.

The invention is applied to the technical field of dangerous chemical safety management, and discloses an intelligent traceability method for dangerous chemical full life cycle management, which comprises the following steps: S1, production link data acquisition and identification binding; s2, warehousing link environment and inventory monitoring; s3, carrying out transportation link state and trajectory tracking; s4, taking the record in the use link; s5, waste disposal link data recording and evidence storage; and S6, whole-process data evidence storage, analysis and application. According to the intelligent traceability method for full-life-cycle management of the hazardous chemical substances, the hazardous chemical substance basic information and the production equipment operation data are automatically input through the terminal device integrating the bar code / RFID generation module, the hazardous chemical substance basic information input module and the production equipment state sensor, so that the problems of low efficiency and high error of manual recording are avoided, and the production efficiency is improved. Meanwhile, a unique RFID code is generated in real time and bound, and data are automatically collected through corresponding sensors and intelligent equipment in the links of storage, transportation, use, waste disposal and the like.

The invention relates to a food-borne microorganism detection method and system based on a spectrum technology. The method comprises the following steps: carrying out correlation analysis on the content sequence of each chemical substance in a plurality of blank matrix samples and the absorbance sequence of each wave band in spectral data of the plurality of blank matrix samples to obtain an aliasing coefficient of each wave band; analyzing the content of each strain in the plurality of strain samples and the absorbance of each wave band in the corresponding strain spectral data to obtain an absorbance influence coefficient between any two strains under each wave band; determining a flora representative coefficient of each wave band according to the number of the plurality of strains, the aliasing coefficient of each wave band and the absorbance influence coefficient of other strains on the first strain under the corresponding wave band; and according to the flora representative coefficient of each wave band and the absorbance sequence of the corresponding wave band in the spectral data of the plurality of target samples, screening a characteristic wave band from each wave band. According to the method, the analysis difficulty during coexistence of multiple flora in a complex matrix is simplified, and the generalization ability and the practical application value of the model are improved.

The invention provides a geopolymer alkali activator based on a red mud raw material and a preparation method of the geopolymer alkali activator, and belongs to the technical field of geopolymer materials. The method comprises the following steps that under the stirring and heating conditions, red mud and plant ash are gradually added into a sodium chloride solution to form a mixed solution, the mass ratio of the red mud to the plant ash is (3-6): 1, and the solid-liquid mass ratio of the red mud to the sodium chloride solution is 1: (3-6); the pH value of the system and the Na2O release amount are continuously detected, when the pH value of the system is larger than or equal to 12.0 and the change amount within 30 min is smaller than 0.1, steel slag micro powder is added, the adding amount is 1-5% of the total mass of the mixed solution, and stirring continues to be conducted for 20-60 min; and when the pH value of the system is stable and no longer increased within 2 hours or the release amount of Na2O is balanced, carrying out solid-liquid separation to obtain filtrate, namely the geopolymer alkali activator. According to the method, the dependence on traditional high-alkalinity chemical substances can be reduced, and a new way is provided for resource utilization of the red mud.

The invention relates to chemical-corrosion-resistant full-polished glaze as well as a preparation method and application thereof, and belongs to the technical field of ceramic production and manufacturing. The chemical-corrosion-resistant fully-polished glaze comprises the following mineral components in percentage by mass: 5%-10% of quartz, 5%-10% of kaolin, 1%-10% of calcined talc, 20%-25% of wollastonite, 10%-20% of calcined kaolin, 1%-5% of calcined alumina, 1%-5% of calcined zinc oxide, 1%-5% of barium carbonate, 1%-3% of titanium oxide, 1%-5% of zirconium silicate and 10%-20% of boron frit. By specially designing a full-polishing glaze formula of the ceramic tile, adjusting the firing temperature and discharging or reducing defects such as air holes in a glaze layer as much as possible, the glaze layer forms a stable inert surface, and chemical substances cannot react with the glaze layer or only slightly react with the glaze layer, so that the transparency, integrity and glossiness of the surface are kept.

The invention discloses a nano reinforcing agent for a modified epoxy powder coating and a preparation method of the nano reinforcing agent, and relates to the technical field of coating materials. According to the invention, through a core-shell-dendritic hybrid structure, different core materials are matched with a shell layer material, and chemical bond directional connection is adopted, so that the nano filler is uniformly dispersed, the problem of agglomeration of a traditional nano material is solved, and meanwhile, high thermal conductivity and antistatic synergism and efficient self-repairing capability are achieved, and a better electrostatic spraying effect is achieved; by adding the nano reinforcing agent with high strength and rigidity, the hardness, impact resistance and wear resistance of the coating can be remarkably improved, so that the service life of the coating is prolonged, and the stability of the coating is improved; due to the design of the nano reinforcing agent and surface functionalization treatment, the hydrophobicity and chemical stability of the coating can be improved, permeation of water and chemical substances is effectively prevented, the corrosion resistance of the coating is enhanced, and the service life of the coating is prolonged.

The invention relates to a method for removing a chemical substance from human excreta, such as faeces and urine, comprising the following steps of: providing a toilet for a person from whose excreta the chemical substance must be removed; releasably connecting a filtering device to the toilet, wherein the filtering device comprises at least one removable cartridge with a filter; transporting the excreta by means of a transport screw from the toilet toward the filter in the cartridge, wherein pressure is exerted on the excreta by means of a plunger; filtering the chemical substance out of the excreta in situ using the filtering device; periodically replacing the at least one cartridge; and processing the replaced cartridge. The invention also relates to a filtering device for application in this method, and a cartridge for use in such a filtering device.

Provided herein are methods of determining the reactivity of one or more minerals present within a geological formation within a target zone in response to the injection of CO2 into the target zone. For example, the methods may comprise one or more of the following steps: (1) determining one or more mineral and fluid characteristics of a geological formation comprising one or more minerals; (2) using a reaction rate model to characterize the chemical reactivity of one or more minerals present in a target zone of the geological formation in response to injection of CO2 into the target zone; (3) using a reactivity index model to estimate the amount of one or more minerals in the target zone that would be modified between a first time point and a second point during a CO2 injection and sequestration operation; and (4) injecting an amount of CO2 into the target zone based on the estimated reactivity of the one or more minerals present in the target zone.

The invention relates to the technical field of food fermentation, in particular to a method for removing fishy smell of eucheuma, which comprises the following steps: pretreating eucheuma; mixing the pretreated eucheuma with a lactobacillus plantarum solution, and fermenting in a fermentation tank; the fermentation tank comprises a reciprocating pump and an air supply system; after fermentation is completed, removing the bacterial liquid, cleaning the eucheuma, and draining water to obtain frond of the eucheuma; after fermentation, washing the eucheuma, carrying out alkali treatment, washing to be neutral, boiling glue in a water bath, and centrifuging to obtain algal glue; the eucheuma is treated by adopting a microbial fermentation technology, chemical substances are not introduced, the cost is low, and the operation is simple; through the pressurized injection technology combining the reciprocating pump with the air supply system, the bacterial liquid is used for impacting the surface of the eucheuma to form pits, so that various substances can be conveniently separated out, the contact area between the bacterial liquid and the eucheuma is increased, a better fermentation effect is achieved, and the fermentation time is shortened; the damage to a carrageenan network structure and the degradation of a molecular chain in a microbial fermentation process are reduced.

The invention relates to the technical field of chemical solution treatment, in particular to a device for reducing the viscosity of a slurry solution and a using method thereof.The device for reducing the viscosity of the slurry solution comprises a bottom bearing table, a closed stirring tank and a stirring detection set used for reducing the viscosity of the slurry solution. Slurry is stirred through the stirring assembly in the stirring detection group, a physical treatment mode is adopted, additional chemical substances do not need to be added, interference of additional components on slurry components is avoided, and the use and maintenance cost of chemical additives is reduced; the slurry in treatment is periodically detected through a detection assembly in the stirring detection group, the slurry reaching the expected viscosity is found in time, the overall production efficiency is improved while the production cost is reduced, dual detection is performed on the neutralized slurry through mutual cooperation of the detection assembly and the central control system, and the production efficiency is improved. And the viscosity of the discharged slurry is guaranteed.

The invention relates to a glass fiber composite felt, a pressed product using the same and a preparation method. The glass fiber composite felt comprises a glass fiber chopped strand mat and a composite layer, the composite layer is provided with pores, the overall porosity of the composite layer is lower than that of the glass fiber chopped strand mat, and the overall thermal shrinkage rate of the composite layer is larger than that of the glass fiber chopped strand mat. The overall thickness of the composite layer is smaller than that of the glass fiber chopped strand mat, the weight of the composite layer per unit area is smaller than that of the glass fiber chopped strand mat per unit area, and the glass fiber composite mat is used for being compounded with a base material in a pressed product formed in a hot pressing mode so as to improve the strength of the pressed product. By comprehensively considering factors such as thermal shrinkage, size and dosage and optimizing materials and interlayer gradient design, the problems of excessive permeation of chemical substances and indentation or damage on the surface of a product can be effectively relieved, the problem of shrinkage deformation in hot-pressing production can be further relieved, and the surface quality and shape precision of the product can be improved.

To provide protective clothing that can protect the body when attacked by a bear and repel the bear. [Solution] Protective clothing worn to repel bear attacks comprises a protective fabric 1 sandwiched between a surface fabric 2 and a backing fabric 3. The protective fabric 1 comprises a chemical-containing layer 11 capable of releasing a chemical to repel bears, and a protective layer 12 for physical protection from bear attacks. The chemical used to repel bears is capsaicin, derived from chili peppers. When a strong force is applied to the human body by a bear attack, physical damage to the chemical-containing layer 11 causes the chemical to be released, allowing the bear to repel. Furthermore, the protective layer 12 cushions the impact on the human body, making the garment effective in protecting the human body from bear attacks.

The invention relates to the technical field of oil liquid detection, in particular to an oil liquid remote monitoring system and a monitoring method thereof, and the system comprises an oil liquid component monitoring module, a spectral feature analysis module, a component cross interference compensation module, an abnormal component screening module and an intelligent early warning module. According to the invention, continuous tracking of trace elements and chemical substances in the oil liquid is realized through real-time remote monitoring and data analysis of the spectrometer, monitoring of metal elements and oxides is more accurate by using a data processing technology, tiny changes of components can be captured in real time, and through detailed analysis of the spectral absorptivity, the detection accuracy of the oil liquid is improved. The system can identify potential anomalies and allow timely intervention at the initial stage of change, so that equipment failure or performance reduction is avoided, coupling weight and deviation value analysis are comprehensively utilized, understanding of complex interaction is greatly enhanced, and a comprehensive decision support basis is provided for risk management and early warning.

A method for determining a chemical intake capacity of a process medium includes steps of providing a measuring point and an analytical measuring device, closing an outlet valve to the drain so that no process medium is discharged and closing the inlet valve so that no additional process medium is fed from the first inlet. The method includes circulating the analyte and process medium through the pump so the mixture flows into the analytical measuring device at a predetermined flow velocity. Further, the method includes detecting a measured value using the analytical measuring device until the measured value exceeds a limit value. The predetermined volumes are summed to form a total volume of the analyte, and a chemical intake capacity of the predetermined medium is determined based on the total volume of the analyte fed in.

To provide a method that comprehensively evaluates risk potential of a chemical substance by combining comprehensive non-target qualitative and quantitative analysis with various hazard evaluation support databases.SOLUTION: A method for comprehensively evaluating risk potential for a chemical substance comprises: a chromatographic separation step of separating a measurement sample into components; a qualitative analysis step of qualitatively analyzing the separated components; a quantitative analysis step of oxidizing and reducing the separated components to make methane, and then quantifying the methane; and a risk evaluation step, for a target substance identified in the qualitative analysis step and the quantitative analysis step, extracting a chemical substance with a similar structure by referring to a database, extracting a chemical substance with physical properties similar to those of the target substance, predicting a toxicity value or arithmetic mean of the toxicity values of the extracted chemical substance as toxicity potential of the target substance, and estimating risk potential.SELECTED DRAWING: Figure 1

The invention relates to a laboratory system including at least one laboratory device which is designed to analyse and / or synthesise a chemical substance; at least one laboratory software module which is designed to process data obtained from the at least one laboratory device; a data processing device with control software that provides an interface for operating the at least one laboratory device and / or the at least one laboratory software module; and a portable device with a microphone, wherein the device is connected interoperably to the control software via a network, wherein the device is designed, in interoperation with the control software, to allow a user to operate the at least one laboratory device and / or the at least one laboratory software module without manual intervention, by speaking into the microphone.

The invention relates to the technical field of comprehensive treatment of agricultural pests, and particularly provides a bactrocera cucurbitae double-trapping type attractant based on optimal matching of host and intestinal bacteria volatile matters and application of the bactrocera cucurbitae double-trapping type attractant. The attractant comprises an active component and a synergistic component, the active component is derived from balsam pear and towel gourd volatile matters and bactrocera cucurbitae intestinal bacterial metabolites, and comprises 2-methyl ethyl valerate, propyl hexanoate, ethyl hexadienoate, heptanal, benzyl alcohol, 3-methyl acetic acid-1-butanol, indole and 1-undecanol; and the synergistic component is myzobenzoic ketone. Active components are quickly released in the early stage of application, so that the attraction efficiency is remarkably improved; the synergistic component prolongs the trapping lasting period through the slow release effect, and the long-term trapping effect is ensured. All the components of the attractant provided by the invention are biological sources or environment-friendly chemical substances, the attractant meets the requirement of green prevention and control, can efficiently attract male and female adults at the same time, makes up the limitation that a traditional sex attractant only induces male adults or a food attractant only induces female adults, and is beneficial to more comprehensive control of population quantity.

Devices, systems, and methods for measuring properties of liquids or surrounding gasses within a sealed container. Some embodiments of the devices, systems, and methods disclosed herein are useful for determining and monitoring alcohol (ethanol) content of a liquid within a sealed container. Some embodiments are also useful for determining and monitoring additional properties of the liquid within the sealed container, such as liquid depth (volume) and / or presence of trace chemicals and flavor components.