14 results about "Redox indicator" patented technology

Disclosed herein is an analytical method for profiling lactate (or other analyte) production in single cells, via the use of coupled enzyme reactions on surface-grafted resazurin / resorufin molecules is provided. Additionally surface-bound resazurin / resorufin that retains redox indicator activity as well as microfluidic devices comprising such surface-bound resazurin / resorufin indicators are provided.

The application provides a fissure sealant containing an indicator and a preparation method and application thereof, and belongs to the technical field of dental materials. The fissure sealant containing the indicator comprises the following raw materials in percentage by mass: 10-79% of an acrylate monomer; 0-1% of a photoinitiator; 0-0.6% of an indicator; 1-10% of titanium white; and 1-20% of a filler. The indicator is composed of a reaction indicator, an acid-base fluorescent indicator and an oxidation-reduction indicator. The fissure sealant cooperates with the three indicators to realize triple functions of fissure position calibration, damage indication and colony infection indication, ensures the effectiveness of protection of the fissure and monitoring of caries of children in the implementation of the fissure process, so as to realize the simultaneous identification of whether the fissure has a gap and leakage by naked eyes, accurate identification of the range of the fissure and accurate filling of the fissure, and direct judgment of the generation of colonies.

The present invention relates to a method for estimating the germination characteristics of a plant seed, comprising the following method steps: a) providing a plurality of individual plant seed parts, each plant seed part comprising at least one plant seed, b) producing or providing a test composition comprising: i) water, ii) a two-stage redox indicator, and iii) a fermentation microorganism, c) contacting the plant seed parts with a respective test volume of a test composition in order to obtain a plurality of individual test systems and incubating the test systems, d) measuring the test composition of the incubated test systems using an optical measurement method, in order to determine the optical absorption properties of the respective test composition for the electromagnetic radiation of at least the first wavelength [lambda] 1 and the second wavelength [lambda] 2, in order to obtain a plurality of absorption data records assigned to the respective test system, wherein the absorption data record comprises information about the absorption characteristics of the respective test composition at the first wavelength [lambda] 1 and the second wavelength [lambda] 2, where [lambda] 1 and [lambda] 2 differ by 10 nm or more, e) evaluating the absorption data record assigned to the test system using a machine learning-based estimation module, so as to estimate germination characteristics of the plant seed in the respective plant seed portion.

Provided herein is a tape roll configured to include an adhesive associated with a color-changing dye to provide the user with a visible marker for the end of the tape roll. In certain aspects, the adhesive is associated with a redox indicator. In certain aspects, the redox indicator is activated upon exposure to air.

The invention relates to the technical field of disinfection articles, in particular to a disinfection color-changing wet tissue with a visual disinfection effect indication function and a preparation method of the disinfection color-changing wet tissue. The disinfecting and color-changing wet tissue comprises a non-woven fabric base material and a working solution, wherein the working solution comprises a basic disinfectant, a color-changing indicating system and a stabilizing system. According to the color change indicating system, a microencapsulation technology is adopted to physically isolate an oxidation-reduction indicator from a reducing agent, in the using process, micro-capsules are broken through mechanical friction to release the indicator, the indicator and reducing substances generated by microbial metabolism are subjected to an oxidation-reduction reaction to generate color change, and therefore visual indication of the disinfection effect is achieved. And the problem of spontaneous reaction of the indicator during storage is solved, and the stability and shelf life of the product are remarkably improved. The product has the advantages of sensitive color-changing response, high sterilization efficiency, reliable indication, good stability and the like, and can meet the requirements of various application scenes such as family daily cleaning, medical environment disinfection and the like.

The invention discloses a hydrogen peroxide low-temperature plasma sterilization chemical indicator card and a preparation method and a verification system thereof, the hydrogen peroxide low-temperature plasma sterilization chemical indicator card comprises a base material and color-changing ink, the color-changing ink comprises the following components by weight: 3.5-8.0 wt% of a porous material, 5-50 wt% of a binder, 1-3.0 wt% of an alkaline substance, 0.8-1.5 wt% of a redox indicator, 0.2-2.0 wt% of a synergistic color developing agent, 0.2-1.2 wt% of a nano stabilizer, and the balance of a solvent; the porous material is a metal organic framework material MOFs or a covalent organic framework material COFs. By utilizing the characteristics of porosity and large specific surface area of MOFs or COFs, effective adsorption and rapid mass transfer of H2O2 can be ensured, and the phenomena that many indicators in the current market are poor in discoloration due to weak penetrating power of hydrogen peroxide and are naturally discolored when placed at normal temperature within the shelf life are improved.

The invention belongs to the technical field of biological detection, and particularly relates to a high-sensitivity colloidal gold immunochromatography kit and application thereof. According to the invention, a traditional colloidal gold immunochromatography kit is improved, that is, glucose and a redox indicator or an acid-base indicator are loaded on a sample pad of a test strip; on the basis of the principle that glucose is catalyzed by colloidal gold to generate oxidation reaction to generate hydrogen peroxide and gluconic acid to change color of a redox indicator or an acid-base indicator, when a colloidal gold method is used for detection, the indicator changes color due to the oxidation reaction at a colloidal gold nanoparticle aggregation part of the kit, so that the original signal intensity is increased, and the detection sensitivity is improved. The sensitivity and the accuracy of colloidal gold immunochromatography detection are greatly improved.

An electrochemical aptamer-based (E-AB) sensor is disclosed. The sensor is a closed bipolar electrode having a first end and a second end. The first end comprises an electrochromic material. The second end comprises an electrocatalyst and an oligonucleotide aptamer tethered to the second end. Further, the oligonucleotide aptamer is labelled with a redox indicator.

The invention relates to a method for estimating the germination properties of plant seeds, comprising the following method steps: a) providing a plurality of separate plant seed portions, each comprising at least one plant seed, b) producing or providing a test composition comprising: i) water, ii) a two-stage redox indicator, and iii) a fermenting microorganism, c) bringing the plant seed portions into contact with a respective test volume of test composition in order to obtain a plurality of separate test systems, and incubating the test systems, d) measuring the test compositions of the incubated test systems using an optical measuring method in order to determine the optical absorption properties of the respective test compositions for electromagnetic radiation at at least a first wavelength λ1 and a second wavelength λ2 for the purpose of obtaining a plurality of absorption data records assigned to the respective test systems, wherein the absorption data records comprise information about the absorption properties of the respective test compositions at the first wavelength λ1 and the second wavelength λ2, with λ1 and λ2 differing by 10 nm or more, e) evaluating the absorption data records assigned to the test systems for the purpose of estimating the germination properties of the plant seeds in the respective plant seed portions using a machine learning-based estimation module.

The invention belongs to the technical field of geotechnical engineering physical model tests, and discloses a tunnel lining physical model crack identification method based on a double-oxidation-reduction indicator, which comprises the following steps: weighing raw materials of similar materials, uniformly stirring, adding the double-oxidation-reduction indicator, continuously stirring, and pouring into a lining test piece; the double-oxidation-reduction indicator is methylene blue and dichlorophenol indophenol, the methylene blue is fixed on the sand surface in the similar material through physical adsorption, and the dichlorophenol indophenol is dissolved in water in the similar material and dispersed in the matrix; loading until the lining cracks through a model testing machine, synchronously recording a crack propagation process by using a high-speed camera, and collecting an image; segmenting a crack region by using a threshold segmentation method, and calculating an average RGB value of a crack center pixel; and substituting into a crack width-color parameter regression formula to calculate the crack width. On the premise of not changing a similar material matrix, uniform dispersion and stable color development of the indicator are realized, so that the reliability of a physical test result is ensured.

The invention relates to the technical field of alloy chemical component detection, in particular to a method for determining Ce in an Al-4Cu-2Ce alloy, and aims to solve the problem that copper interference exists when the cerium content in the Al-4Cu-2Ce alloy is determined by adopting a chemical titration method under the condition of lack of equipment such as a spectrograph at present. The method comprises the following steps: dissolving an Al-4Cu-2Ce alloy sample by using dilute sulphuric acid, filtering out insoluble copper, oxidizing cerium into tetravalent cerium by using ammonium persulfate, titrating by using an ammonium ferrous sulfate solution, and determining the content of the Cu4Cu-2Ce alloy sample in the presence of a phenanthroline oxidation-reduction indicator. The percentage content of cerium in the alloy sample is calculated and measured by using the volume number of the consumed ammonium ferrous sulfate standard solution, so that the copper interference phenomenon in the traditional cerium content measurement is effectively avoided, and the detection efficiency of factory inspection of the Ce content in the Al-4Cu-2Ce alloy is greatly improved.

The present disclosure provides apparatuses and methods of performing controlling actions. The method includes charging a battery having a cathode. The cathode includes a redox indicator. The battery is discharged, where discharging the battery includes identifying a potential drop of the redox indicator. The controlling action is performed based on the potential drop.

Method and systems for measuring growth rate in plant or aquatic animal species such as embryonic or adult fish. The methods and systems utilize the measurement of NADH2 production by detecting a colorimetric and fluorescent shift when a redox indicator such as resazurin is added to a sample. The colorimetric / fluorescent shift is indicative of the reduction of the redox indicator by NADH2. The methods and systems of the present invention may be used to predict growth potential of a plant or animal, and measuring the growth rate of said plant or animal may be helpful for identifying and selecting individuals within a group that have greater growth potential. The methods and systems of the present invention may help eliminate the need for special equipment (e.g., for measuring oxygen consumption), decrease variability of measures, and minimize the effects of external factors (feeding / hormonal status).

The present invention belongs to the field of biological detection technology, and specifically relates to a highly sensitive colloidal gold immunochromatographic kit and its application. The present invention improves upon a conventional colloidal gold immunochromatographic kit by loading glucose and a redox indicator or acid-base indicator onto the sample pad of a test strip. The invention utilizes the principle that colloidal gold catalyzes an oxidation reaction of glucose to produce hydrogen peroxide and gluconic acid, causing the redox indicator or acid-base indicator to change color. When the colloidal gold method is used for detection, the indicator changes color due to the oxidation reaction at the locations where the colloidal gold nanoparticles in the kit aggregate, thereby increasing the original signal intensity and greatly improving the sensitivity and accuracy of the colloidal gold immunochromatographic detection.