67 results about "Chromogenic" patented technology

The present invention relates to a humidity sensor, and more particularly, to a resistance film-type real-time chromogenic humidity sensor produced with a polyelectrolyte thin film. The humidity sensor according to the present invention is a chromogenic hygrometer in which a polyelectrolyte nano thin film that absorbs moisture is formed on a reflective layer, and the nano thin film varies terms of color and electrical resistance as moisture is absorbed and the thickness varies. The hygrometer according to the present invention is a dual-function hygrometer, the color and resistance of which vary. Provided is the chromogenic hygrometer in which the sensor made using a PSS-b-PMB thin film varies in color between purple, blue, green, yellow, orange, and red according to humidity at a very high response speed of within one minute.

The invention provides a judgment reagent and a judgment method for flocculant residues in washed sand. The judgment reagent comprises the following components in parts by mass: 2-10 parts of a masking agent, 3-6 parts of activated carbon, 15-30 parts of a buffer solution, 1-5 parts of a chromogenic reagent and 30-60 parts of a competitive reaction solution, the judgment method comprises the following steps: taking a sand washing sample, adding water, stirring, sequentially adding the masking agent, the activated carbon, the buffer solution, the color developing reagent and the competitive reaction solution, and judging the flocculant residue by observing whether precipitate is generated or the color is changed. The device has the advantages of rapidness, portability, economy and easiness in operation, and is suitable for field use.

The invention discloses a chemical chromogenic reaction time sequence characteristic analysis method based on a CNN-LSTM model, and aims to establish a relationship between a chemical reaction color characteristic signal and time change. The method comprises the following steps: firstly, pretreating a PAD (paper-based analysis device) by using a phenanthroline reagent, and then dropwise adding iron ion solutions with different concentration gradients; in a single-light-source and all-black environment, continuous image data in a reaction process is acquired, and a rich data set is obtained. Preprocessing the acquired image data, including operations of cutting, denoising, enhancing, normalizing and the like, and extracting effective image information; spatial features of each frame of image are extracted by using a convolutional neural network (CNN), the features are input into a long short-term memory network (LSTM), time dynamic features of color changes are learned, and finally a change rule of the color features along with time or a prediction result is output. The invention provides an efficient and accurate chemical chromogenic reaction dynamic analysis method which can be widely applied to the field of chemical reaction monitoring and analysis.

The invention relates to a method for preparing a multi-anti-counterfeiting patterned photonic crystal structure color-forming fabric by a screen printing method. The method comprises the following steps: S1, preparing a high-mass fraction nano-microsphere color paste and an ultraviolet fluorescent printing color paste for structural coloring; S2, applying a screen printing method to scrape the ultraviolet fluorescent printing color paste on the surface of a hydrophobic fabric to prepare a first ultraviolet fluorescent anti-counterfeiting pattern with anti-counterfeiting information; S3, scraping the slurry on the surface of the hydrophobic fabric with the first ultraviolet fluorescent anti-counterfeiting pattern obtained in S2 by a screen printing method to prepare a hydrophilic transparent pattern base layer and completely cover the first ultraviolet fluorescent anti-counterfeiting pattern; S4, scraping the high-mass fraction nano-microsphere color paste on the surface of the hydrophilic transparent pattern base layer obtained in S3 to prepare a second photonic crystal anti-counterfeiting pattern; S5, heating the fabric on which the nano-microsphere color paste is scraped obtained in S4 to obtain the multi-anti-counterfeiting patterned photonic crystal structure color-forming fabric.

The invention belongs to the technical field of circuit board detection, and particularly relates to a method for detecting, identifying and analyzing residues in a circuit board cavity, which comprises the following steps of: positioning suspected residual areas according to the gray difference of an X-ray image, generating a space coordinate set of the suspected residual areas, screening out a to-be-analyzed area set by combining chemical chromogenic reaction intensity and X-ray contour features, and analyzing the to-be-analyzed area set. The method comprises the following steps of: obtaining a plurality of regions, dividing the regions into a plurality of subsets according to spatial diffusion characteristics, obtaining element and functional group data of each region through energy spectrum and spectral analysis, analyzing candidate residue categories, and dynamically adjusting subset division based on the consistency of the candidate categories in the subsets until the consistency requirement is met. And finally, outputting a specific residue category for each region according to a division result. According to the method, dynamic subset division is carried out according to the space congruency and the contour features, systematic distinguishing and classification of diffusion type residues and attachment type residues are achieved, and the accuracy of category judgment is improved.

The invention relates to a detection result interpretation method of a portable constant-temperature nucleic acid amplification instrument, and relates to the field of detection equipment, and the method comprises the following steps: placing a multi-tube PCR (Polymerase Chain Reaction) tube filled with an amplified chromogenic nucleic acid reagent and a colorimetric card in the same environment for photographing; performing image processing analysis on the picture, determining pixel positions of a plurality of test tubes and pixel positions of a standard color card, and performing image color extraction to obtain RGB values; correcting the color through an algorithm, and calculating a judgment value of the color of the reagent in the PCR tube; a color judgment threshold value is set to be 0.4, if the calculated judgment value is larger than the threshold value, it is judged that the PCR tube is positive, and if the calculated judgment value is smaller than the threshold value, it is judged that the PCR tube is negative. And the interpretation accuracy of the amplification detection result is improved.

To provide a thermochromic color memory composition that employs a specific ester compound and exhibits a color memory effect in a low temperature range.SOLUTION: A thermochromic color memory composition comprising at least: (i) an electron-donating chromogenic organic compound, (ii) an electron-accepting compound, and (iii) a specific reaction medium for controlling the chromogenic reaction of the component (i) and the component (ii), wherein the thermochromic color memory composition undergoes color change with a hysteresis width (ΔH) of 8 to 100°C in a color density-temperature curve, wherein a complete coloring temperature t1 is equal to or lower than -30°C, and a complete decolorizing temperature t4 is in a range of -25 to 15°C.SELECTED DRAWING: None

A bacterial colony forming unit (CFU) detection system is disclosed that utilizes a thin film transistor (TFT)-based image sensor array that saves about 12 hours compared to methods approved by Environmental Protection Agency (EPA). Lensless imaging modes are constructed using TFT image sensors having a sample field of view of about 10 cm2. And automatically collecting delay images of bacterial colonies cultured on the chromogenic agar plate every 5 minutes. Two deep neural networks are used to detect and count colonies in growth and identify their species. When 265 escherichia coli and other coliforms (namely citrobacter and klebsiella pneumoniae) colonies are used for blind detection, the average CFU detection rate of the system reaches 97.3% when the system is cultured for 9 hours, and the average recovery rate of the system reaches 91.6% when the system is cultured for about 12 hours. The TFT-based sensor can be applied to various microbiological detection methods. The imaging field of view of the platform can be economically and efficiently increased to more than 100cm < 2 >.

The present patent invents a method for detecting amoxicillin in breast milk based on the colorimetric method of aptamer combined with gold nanoparticles (AuNPs) and a smartphone. It is characterized in that the aptamer conjugated with gold nanoparticles specifically binds to amoxicillin in breast milk. In the presence of a salt solution, different concentrations of amoxicillin can cause different degrees of aggregation of gold nanoparticles, resulting in different colors of the solution. The color of the solution is collected by an image acquisition device and transmitted to a smartphone, and the smartphone analyzes the change in the RGB value of the image to obtain a quantitative result, thereby realizing the detection of residual amoxicillin in real breast milk samples. This method can obtain quantitative detection results in a short time, and has the advantages of high sensitivity, good specificity, low cost, simple operation, etc., and is easy to promote and apply.

Systems and methods for imaging and, in some instances, analyzing biological samples such as biological tissue are described. The systems and methods may be directed to the interrogation of biological samples labeled with multiple markers (e.g., fluorophores and / or chromophores) corresponding to various biomarkers and / or cellular or subcellular structures within the sample. Some such systems and methods may combine certain optics (e.g., configurationally-fixed optics for fluorescence imaging and / or actuatable filters for chromogenic imaging) with multi-color sensors (e.g., RGB sensors) to facilitate the imaging and analysis of a sample. The systems and methods may also promote advantageous techniques for segmenting images of components of the biological sample. In some instances, the methods can assist users (e.g., pathologists) in scoring samples for indications such as diseases. The systems and methods may, in some instances, promote economical, accurate, and / or higher-throughput imaging and analysis of the sample.

The present invention discloses a preparation method and application of a sulfonylurea-structured thermosensitive color developer, relating to the technical field of color developers. The core of the thermosensitive color developer is a compound of formula 1 containing a sulfonylurea structure. The preparation method is achieved through three steps: esterification of raw materials to synthesize intermediate 1, borylation to obtain intermediate 2, and then synthesis of the target compound through the Suzuki reaction. Through the synergistic effect of the sulfonyl group and the urea group, the regulation of the hydrogen bond network and the optimization of the electron transfer efficiency are realized, solving the technical bottlenecks of the high-temperature activation requirement and insufficient color development stability of traditional thermosensitive color developers.

The application describes chromogenic conjugates for color-based detection of targets. The conjugate includes a chromogenic moiety such as rhodamine, rhodol or fluorescein. The chromogenic moiety is linked to a peroxidase substrate. The chromogenic conjugate can be used for immunohistochemical analysis and in situ hybridization. The conjugate can be used to detect 1, 2, 3 or more targets in a sample by color.

The invention discloses a method and a device for rapidly measuring the concentration of various inorganic anions in water. According to the method, rapid and high-precision colorimetric detection of eight ions such as fluorine ions, chloride ions, nitrite ions, bromide ions, nitrate ions, phosphate radicals, sulfite radicals and sulfate radicals is realized by adopting a reaction strategy of adding a color developing auxiliary agent and a specific color developing agent step by step and combining with step-by-step uniform mixing and optimizing a reagent combination, a concentration ratio and a reaction time sequence aiming at different target ions. The device comprises a sample groove, a multi-cavity color developing agent bin, a color developing auxiliary bin, a reaction tank, a liquid path conveying module, an image acquisition module and a control module which are integrated in a shell. Through deep integration of a chemical system and an automatic process, the problems of cross interference, poor color development stability, complicated operation and the like in multi-index detection of portable equipment are solved, and the method has the advantages of high detection speed, high accuracy, strong anti-interference performance, easiness in carrying and simplicity and convenience in operation.

A self-cleaning and base line stabilizing device of an automatic nutritive salt analyzer comprises a reaction assembly used for mixing a sample liquid sample, air and a corresponding reaction reagent to complete a chromogenic reaction; the light splitting detector is connected with the output end of the reaction assembly through a first connecting pipe; the cleaning assembly at least comprises a change-over valve, a second connecting pipe and a first peristaltic pump, the change-over valve is arranged on the first connecting pipe and located between the reaction assembly and the light splitting detector, one end of the second connecting pipe is connected with the change-over valve, the other end of the second connecting pipe can be connected with a reagent bottle filled with hydrochloric acid, and the second connecting pipe is sleeved with the first peristaltic pump. According to the method, pollution caused by adsorption of the flow cell can be actively prevented, the whole process only needs short time, baseline drift caused by adsorption of the chromogenic complex is prevented, the working efficiency is remarkably improved, and finally synchronous improvement of the determination efficiency and the data stability is achieved.

The utility model discloses a kind of liquid paper diaper, it is related to paper diaper technical field, including front waist piece, paper diaper body and rear waist piece set in sequence, the paper diaper body includes surface layer structure, absorption layer structure, chromogenic structure and bottom structure, the surface layer structure is provided with through-hole, the absorption layer structure includes first absorption layer and second absorption layer, the first absorption layer is arranged in the outside of surface layer structure, the second absorption layer is arranged in the outside of first absorption layer, first absorption layer and the connecting place of second absorption layer are provided with first flow guide groove, first flow guide groove is provided with first flow guide channel, the chromogenic structure is between second absorption layer and bottom structure. The liquid paper diaper of the utility model can improve water absorption speed and water absorption capacity, and show liquid volume.

The present invention provides a reversible thermochromic composition which exhibits black color upon coloration and colorless color upon discoloration, and has excellent light resistance, by using a fluoran derivative having a specific structure as an electron-donating chromogenic organic compound, and a reversible thermochromic microcapsule pigment containing the reversible thermochromic composition. The means for solving the problem is a reversible thermochromic composition comprising: (a) a fluoran derivative having a specific structure as an electron-donating chromogenic organic compound, (b) a compound having a specific structure as an electron-accepting compound, and (c) a reaction medium which allows the electron transfer reaction between the (a) component and the (b) component to occur reversibly in a specific temperature range, and a reversible thermochromic microcapsule pigment containing the reversible thermochromic composition.

The present invention relates to a two-color thermosensitive erasable paper based on the design of chromogenic agent matching and a preparation method thereof, and relates to the technical field of printing consumables. The two-color erasable thermosensitive paper includes a thermosensitive coating, and the thermosensitive coating includes a red thermosensitive coating and a black thermosensitive coating arranged in sequence from top to bottom. The chromogenic temperature difference between the red thermosensitive coating and the black thermosensitive coating is greater than 30 °C; the components of the red thermosensitive coating include a low-temperature chromogenic agent and an erasing aid I; the components of the black thermosensitive coating include a high-temperature chromogenic agent and an erasing aid II. Through the structural matching design of the low-temperature chromogenic agent in the red thermosensitive coating and the high-temperature chromogenic agent in the black thermosensitive coating, the chromogenic temperature difference between different thermosensitive coatings is realized to achieve color overlay; combined with the erasing aid, its efficient erasing is realized.

The utility model provides a shading box for chromogenic reaction, which relates to the technical field of shading boxes for chromogenic reaction, and comprises a shading mechanism, the shading mechanism comprises a bottom plate, a box body is arranged at the top of the bottom plate, a top cover is arranged at the top of the box body, a black jacket layer is fixedly connected in one box body, and the black jacket layer is fixedly connected in the other box body. Wherein the bottom of one top cover is fixedly connected with a black cushion layer, and the interior of the other box body is fixedly connected with a white sleeve layer. According to the titration device, the shading mechanism is arranged, so that a detector is not influenced by external light rays during titration chromogenic reaction observation and comparison, a detection result can be more accurate, and meanwhile, the two box bodies and the two top covers are arranged, so that the titration device is more convenient to use. Therefore, the two box bodies and the top cover are fixedly connected with a black sleeve layer, a black cushion layer, a white sleeve layer and a white cushion layer respectively, so that the two box bodies can provide two different detection environments.

The application discloses a chromogenic test paper for detecting aflatoxin and a preparation method thereof. The method adds montmorillonite to Fe(OH)3 colloid and mixes, and drops the mixture on a nitrocellulose membrane and waits for it to dry. The mixed solution of the Fe(OH)3 colloid and the montmorillonite in the application has an adsorption effect on the aflatoxin, forms a color block under the particle agglomeration effect, and realizes visual detection of the aflatoxin.

The application relates to the technical field of cosmetic detection, and particularly discloses a test paper card for detecting boric acid and / or borate in cosmetics and a detection method. The test paper card for detecting boric acid and / or borate in cosmetics comprises an activated sample pad, a functional reaction film and a PVC bottom plate which are sequentially attached, the activated sample pad is a glass fiber membrane soaked by a pretreatment reagent, the functional reaction film is a nitrocellulose membrane coated by a chromogenic reagent, the functional reaction film comprises an attaching area and a chromogenic area, the activated sample pad is located in the attaching area, and the chromogenic area is exposed to the environment. The application can be used for detecting whether boric acid and / or borate is contained in cosmetics, and can improve the sensitivity and stability of the detection of boric acid and / or borate in cosmetics.

The present invention relates to disinfection technology, and particularly to a quality control technology for o-phthalaldehyde disinfectant solution. A rapid detection indicator card impregnation composition for o-phthalaldehyde disinfectant solution, which comprises the following in mass percentages: stabilizer: 1% - 10%; chelating agent: 5% - 20%; neutralizing agent: 0.1% - 2%; chromogenic agent: 0.1% - 20%; chromogenic accelerator: 1% - 4%; the balance is pure water. After impregnating filter paper with the composition and drying it, it is pasted on white plastic paper with double-sided tape and compacted to form the rapid detection indicator card. The indicator card of the present invention has more stable, obvious and clear color development, rapid detection and more reliable results.

The utility model relates to the technical field of pressure-sensitive paper finished product packaging, and discloses a pressure-sensitive paper packaging finished product, the pressure-sensitive paper comprises a color developing layer and a microcapsule layer which are the same in shape and size, the color developing layer and the microcapsule layer are stacked, one side edge of the color developing layer and one side edge of the microcapsule layer are a connecting edge and are connected together through a splicing piece, an isolating layer is clamped between the color developing layer and the microcapsule layer, and the color developing layer and the microcapsule layer are connected through the splicing piece. The isolating layer prevents the color developing layer from being in direct contact with the microcapsule layer, and the size of the isolating layer is not smaller than that of the color developing layer and the microcapsule layer. According to the utility model, the isolating layer is clamped in the middle of the pressure sensing paper, so that when the pressure sensing paper is used, the isolating layer is pulled out, and the color developing layer and the microcapsule layer are attached for use.

The invention relates to the technical field of chemical analysis, and discloses a water quality ammonia nitrogen rapid detection system and method based on an intelligent terminal and machine learning, and the method comprises the following steps: mixing a to-be-detected water sample with a Nessler reagent to carry out a chromogenic reaction to obtain a chromogenic to-be-detected sample; performing flash lamp differential image acquisition on the to-be-tested color developing sample by using image acquisition equipment of an intelligent terminal to obtain an ambient light image and a flash lamp image; extracting color features from the same region of interest of the ambient light image and the flash lamp image, and constructing a combined feature vector; and inputting the combined feature vector into a pre-trained machine learning model to obtain one or more ammonia nitrogen detection results of the to-be-detected chromogenic sample. According to the invention, the interference of ambient light and equipment difference is effectively overcome by utilizing a flash lamp differential acquisition technology and a machine learning algorithm, expensive instruments or light boxes are not needed, and low-cost and high-precision portable ammonia nitrogen detection is realized.

The invention discloses a method for quickly testing chemical oxygen demand, which comprises the following steps of: 1, preparing a test solution which comprises the following components: A, a potassium dichromate solution (c is equal to 0.0250 mol / L); b, a mercury sulfate solution (100g / L); c, a silver sulfate-sulfuric acid solution (10g / L); 2, preparing a standard water sample; step 3, preparing a comparison reference sample, sequentially adding the standard water sample, the reagent B and the reagent A into the colorimetric tube, uniformly shaking, adding the reagent C into the colorimetric tube by using a pipette, uniformly shaking, and standing until the reaction is finished; 4, developing the water sample to be detected, sequentially adding the water sample to be detected, the reagent B and the reagent A into the colorimetric tube, uniformly shaking, adding the reagent C into the colorimetric tube by using the pipette, uniformly shaking, and standing until the reaction is finished; and 5, carrying out color comparison on the to-be-detected water sample obtained in the step 4 and a comparison reference sample.

The invention relates to the technical field of biological detection reagents, in particular to a preparation process of an anti-interference urine trace protein and urine creatinine double-chromogenic detection reagent, which comprises the following steps: dissolving a composite buffer agent in deionized water at 20-38 DEG C, stirring and dissolving, and adjusting the pH value of the system to 7.0-7.3; adding a composite anti-interference agent, an EDTA-2Na masking agent and enzymes in sequence, continuously stirring, and controlling the temperature of the system not to exceed 38 DEG C; independently preparing an improved BCA color developing agent and a copper sulfate auxiliary color developing agent, mixing and standing; adding the color developing system into the buffer solution system, adding a compound stabilizer, stirring and standing; by adopting a multi-enzyme synergistic composite anti-interference system and combining the synergistic effect of the masking agent, the influence of various interfering substances in urine can be effectively shielded, and non-specific reaction between the interfering substances and a detection system is avoided.

The utility model relates to the technical field of water quality detection, in particular to a maintenance-free online DPD residual chlorine analyzer which comprises two groups of detection inlets arranged at the bottom of a measuring chamber, the two groups of detection inlets respectively supply reagents and water samples to the measuring chamber, a first input cabin is arranged at the input end of a water sample pump to respectively supply the water samples or cleaning fluid to the water sample pump, and a second input cabin is arranged at the input end of the water sample pump. The silicon photocell is arranged on one side of the measuring chamber, two groups of detection inlets are formed in the bottom of the measuring chamber, and the two groups of detection inlets can be respectively connected with a reagent pump and a water sample pump so as to supply a reagent and a water sample into the measuring chamber, so that residual chlorine detection of the water sample is met; the cleaning cabin can be matched with the water sample pump to clean the measuring chamber after measurement, so that components after color development of a detection sample are remained in the measuring chamber, and the intensity of light penetrating through the measuring chamber can be detected through the silicon photocell beside the measuring chamber.

The present disclosure provides for porous polymer materials that include an ordered array of voids separated by a polymer framework. The porous polymer material can have a recovery state where the voids are in an uncollapsed state and iridescent color, and a deformed state having voids in a collapsed state that is non-iridescent or substantially transparent. The materials can have regions of both states simultaneously. Also described are methods for fabricating a polymer material as above, as well as chromogenic sensors including the polymer material. The sensors can have hidden anti-counterfeiting patterns, hydrophobic / oleophobic properties, and chromogenic transformation can be triggered by various stimuli such as solid target compounds, light energy, and more.

Provided herein are methods for fabricating a porous polymer material, methods for revealing hidden anti-counterfeiting patterns, chromogenic sensors having hidden anti-counterfeiting patterns, and the like. Chromogenic sensors including porous polymer materials are provided. The chromogenic sensors can reveal hidden patterns such as anti-counterfeiting patterns and the pattern can be re-hidden.

The invention discloses heavy metal developing test paper based on a carbon quantum dot composite material as well as a preparation method and application thereof, and belongs to the technical field of heavy metal detection. The heavy metal chromogenic test paper comprises a quantitative filter paper substrate, a composite indicator and a colloid protection layer, wherein the composite indicator is prepared from a silk fibroin-anthocyanin compound, fluorescent carbon-based quantum dots and rich-pore carbon nitride, and is loaded on the substrate through mesoporous silicon balls; and the colloid protection layer is a mixed colloid solution of a masking agent and a sensitizer. The preparation method comprises the following steps: independently preparing the components, constructing the composite indicator, loading the meso-porous silicon balls and coating the protective layer. According to the invention, on-site rapid semi-quantitative detection of cadmium ions and ferric ions in soil or water can be realized, the operation is simple and convenient, the cost is low, and on-site screening requirements are met.

The present invention relates to the technical field of cuvettes, and in particular to providing a universal cuvette device for absorbing fluorescence and a measuring method. The universal cuvette device for absorbing fluorescence comprises a cuvette combination, wherein the cuvette combination consists of a first cuvette unit and a second cuvette unit, wherein the second cuvette unit is inserted into the first cuvette unit through a top opening, and the second cuvette unit can be lifted and lowered along the first cuvette unit; a trigger assembly is provided at the bottom of the cavity of the first cuvette unit, a control hole is provided at the bottom of the second cuvette unit, the trigger assembly comprises a lifting plate, the lifting plate slides on the bottom of the inner cavity of the first cuvette unit, a through hole is provided on the lifting plate, and the lifting plate is more referenceable when applied to colorimetric testing of two solutions. The colorimetric blood of this double-cavity detection is superior to the prior art in actual use.