32results about How to "Rapid detection response" patented technology

The invention provides a type of fluorescent probes for detecting formaldehyde. The probes have the structures shown as formulas I to IV. Benzene ring correspondingly substituted coumarin is firstly subjected to backflow reaction with Lawson reagents in toluol; an obtained product continuously performs backflow reaction with hydrazine hydrate in ethanol. The fluorescent probes per se provided by the invention do not have fluorescence in the water solution, but can take a specific fast reaction with formaldehyde to produce products with strong fluorescence, so that the specific sensitive detection and quantitative analysis of formaldehyde is realized. The stability is high; the long-time storage use can be realized; the detection signal-to-noise ratio is high; the sensitivity is high; the excellent selectivity is realized; the specific formaldehyde detection in complicated biological samples can be realized; good biomembrane permeability is realized, so that the fluorescent probes can be used for formaldehyde detection in living cells; the detection reaction is fast; the detection result can be given within 1 minutes for formaldehyde in the water solution; during the formaldehyde detection, the formaldehyde concentration in the environment cannot be influenced. The general molecular formulas of the probes provided by the invention are shown as the accompanying drawing.

The invention discloses a method, system and chip test paper for parallel detection on various cardiac markers. The chip test paper is used for detecting a part or all of the cardiac markers including cTNI (cardiac troponin I), cTNT (cardiac troponin T), MYO (myoglobin), CK-MB (isoenzymeof creatine kinase containing M and B subunits), BNP (B-type natriuretic peptide), CRP (C-reactive protein) and FABP (fatty acid-binding protein); the chip test paper comprises a first membrane and a second membrane; a ligand An of each marker is arranged on the first membrane, and a ligand Bn coupled with a signal marker is absorbed on the second membrane; and a detected material forming sandwich detection together with the ligands An and Bn is added from a sampling hole, then under the acting force of percolation or other factors, the detected material moves to be combined with the ligands An and Bn respectively to form a composite array of the first membrane-the ligand An-the detected material-the ligand Bn-the signal marker, which is fixed on the first membrane, the composite array and a capture fiber membrane are assembled simultaneously, and a detection hole is reserved. The method, the system and the chip test paper provided by the invention can be used for detecting the various cardiac markers simultaneously and quantitatively; moreover, the detection sensitivity can be improved, and the detection time is saved.

The invention provides a photosensitive composite water entry detection device comprises an infrared emitting diode, a photosensitive transistor, a base, an optical probe, an infrared unidirectional light transmitting film, a positive electrode, a negative electrode, a photosensitive detection circuit, a conductive detection circuit and a logic AND circuit, wherein, the photosensitive composite water entry detection device comprises an infrared emitting diode, a photosensitive transistor, a base, an optical probe, an infrared unidirectional light transmitting film, a positive electrode, a negative electrode, a photosensitive detection circuit and a logic AND circuit. A photosensitive composite water inlet detecting device, rapid detection, Simple circuit principle, Reliable function, at present, that practical application of the helicopt floating system is sol, The false triggering phenomenon of water entry detection under the natural environment such as freezing or man-made misoperation conditions, and the non-triggering phenomenon of water entry under the natural strong light environment, therefore, the invention has good reliability and strong pertinence, and can be widely popularized and applied in many fields of multi-type helicopters and offshore life-saving floating platforms, and has great practical value.

The invention relates to a solid-state quantum dot sensor as well as a preparation method and application thereof. Quantum dots are embedded into a polymer matrix formed by perfluorosulfonic acid andpolyvinyl alcohol to form the solid-state quantum dot sensor. Glucose oxidase is embedded into the solid-state quantum dot sensor to generate a solid-state quantum dot glucose sensor. According to thesolid-state quantum dot sensor provided by the invention, the quantum dots and the glucose oxidase are stable in the sensor by specifically selecting a polymer matrix, when the sensor is exposed on atest sample, rapid response can be realized, and the detection efficiency and the sensitivity are improved.

The invention belongs to the technical field of two-photon fluorescence labeling probes and application thereof. The invention particularly relates to a two-photon fluorescence labeling probe, and a synthesis method thereof and application of the two-photon fluorescence labeling probe in novel coronavirus diagnosis. The probe has the chemical name of 3-(N-methyl-N-(6-acetyl-2-naphthyl)amino)propionic acid-N-hydroxysuccinimide ester. The two-photon fluorescent probe has the advantages of high sensitivity and rapid and accurate detection; a fluorescent antigen obtained by labeling an N protein antigen of 2019-nCoV with the probe can be made into an immunochromatographic test strip or a detection kit, and can be used for rapid detection of novel coronavirus, and the test strip or the kit hasthe excellent characteristics of rapid detection, high detection consistency and high stability.

The invention discloses a toilet device provided with a drying mechanism, belongs to the technical field of toilets, and solves the problem that the use effect is affected due to the fact that the drying mechanism on the conventional toilet device cannot sense the opening and closing states of a baffle plate in time. The toilet device comprises a main body part, a control mechanism, a spray nozzle mechanism, the drying mechanism and a baffle plate sensing mechanism, wherein the main body part is connected with a toilet assembly for supporting a human body; the control mechanism comprises an operating part located on the outer side of the main body part and a control part located in the main body part; the spray nozzle mechanism is mounted at the main body part and used for washing the local private part of the human body; the drying mechanism comprises a casing, an air supply device for producing airflow and a heater for heating the airflow, and the casing is provided with an air outlet for supplying dry air to the human body and a baffle plate for opening or closing the air outlet; the baffle plate sensing mechanism is arranged on the drying mechanism and connected with the control part, and the control part is used for judging the opening and closing states of the baffle plate according to feedback signals of the baffle plate sensing mechanism.

The invention provides a sulfydryl-containing fluorescent compound or a thioester derivative thereof and preparation and application thereof. The sulfydryl-containing fluorescent compound or the thioester derivative of the sulfydryl-containing fluorescent compound can emit strong fluorescence, the compund can directly react with nitric oxide or specifically and rapidly react with nitric oxide after the ester group is removed so as to generate the weak fluorescence product, and the quenched fluorescence can be gradually recovered to the initial level when the nitric oxide concentration is reduced so as to achieve the reversibility and the real-time dynamic detection on nitric oxide. The fluorescent probe is good in stability and can be stored and used for a long time; the detection signal-to-noise ratio is high, and the sensitivity is good; the compound has the advantages of good selectivity, good biofilm permeability, rapid detection reaction and reversibility of detection response andis suitable for real-time dynamic observation of endogenous nitric oxide in organisms such as solutions, intracellular organisms and living tissues. The structural formula of sulfydryl-containing fluorescent compound or the thioester derivative thereof is shown in the specification.

The invention discloses aptamer colloidal gold lateral chromatography test paper for detecting kanamycin, and belongs to the fields of analytical chemistry, medicine, environment, food safety, nano biosensing and the like. According to the invention, the complementary sequences (Aptamer and CapApt) of DNA can be rapidly and sensitively captured by utilizing AuNPs@ polyA-DNA, and the colloidal gold lateral chromatography test strip which is rapid, sensitive and low in cost is developed. The kanamycin detection by the test strip method is simple, convenient and rapid, the detection can be carried out at any time and anywhere, the test result can be observed only by adding a test solution into a sample port and completely developing the test strip after 5 minutes, and the detection efficiency can be greatly improved. Qualitative analysis is carried out by naked eyes, and quantitative analysis is carried out by using a colloidal gold test paper quantitative analyzer. The aptamer colloidal gold lateral chromatography test paper has important significance on kanamycin residue detection in food.

The invention discloses a submarine cable wear hidden danger detection device and method, and the device is characterized in that the device comprises an excitation source, an armor layer, an output cable, a coated optical fiber, a connection optical fiber, and POTDR equipment; the excitation source is connected with an armor layer of the submarine cable through an output cable and is used for injecting current into the armor layer through the excitation source, and the POTDR equipment is connected with a cladding optical fiber of the submarine cable through a connecting optical fiber and is used for monitoring the polarization state change of the optical fiber and positioning the accurate position of a damaged point according to the sudden change position of the polarization state change of the optical fiber. According to the invention, early warning can be carried out on defect hidden dangers before an accident occurs, and operation and maintenance personnel are reminded to handle the hidden dangers in time.