11 results about "Enzyme testing" patented technology

The invention relates to the technical field of biology, in particular to leukocyte esterase detection test paper and a preparation method thereof. Based on the principle of a substrate and a color developing agent, the color developing depth is in direct proportion to the concentration of the esterase, so that the concentration of the leukocyte esterase in a detection sample can be judged according to the color developing depth; meanwhile, under the auxiliary action of calcium chloride and other materials, the detection distinction degree, the detection accuracy and the detection result stability are further improved. The leukocyte esterase test paper provided by the invention is simple in sample detection method, more stable in product performance, longer in validity period and wide in application range, can be used as an auxiliary evaluation index for vagina inflammation, and is combined with a cleanliness index and the like to jointly evaluate the vagina environment.

One aspect of the invention provides a method for detecting a target organism in a sample, the method comprising: a. Optionally immobilizing the target organism on a solid phase; b, incubating the target organism and one or more reporter enzyme detection probes together to form one or more target organism-enzyme detection probe compounds; c, removing any uncombined reporter enzyme detection probe; d. Contacting the one or more target organism-enzyme detection probe complexes with a diffusion rate limiting medium containing one or more substrates, and incubating the one or more target organism-enzyme detection probe complexes with the one or more substrates in the diffusion rate limiting medium, to generate one or more detectable products in the diffusion rate limiting medium; and e. Detecting the one or more detectable products by detecting the visible spots.

Described herein is a microphysiological system for models of disease. Specifically, induced pluripotent stem cells (iPSCs) and iPSC-derived cells, including those obtained from disease patients, are seeded onto microfluidic “chip” devices to study cellular development and disease pathogenesis. Herein, neurodegenerative disease modeling, including Parkinson's Disease (PD) is shown to reproduce key PD pathology in a vascularized human model that contains neurons relating to PD pathology. Such compositions and methods are used for research for PD biomarkers, patient screening for PD risk assessment, and therapeutic discovery and testing. A panel of biomarkers are generated through analysis of living PD-chips by neural activity, whole transcriptomic, proteomic, and metabolomic analysis, and functional enzyme tests of media and tissue. Introducing therapeutics through a vasculature channel, coupled with blood brain barrier penetration studies can be assessed for efficacy in the human neural cells present in the PD-Chip.

The invention relates to the field of biological detection, in particular to a detection reagent and application thereof. The invention provides a detection reagent which comprises the following components: 10 to 200 mM of a buffer solution, 5 to 20 g / L of polyvinylpyrrolidone K30 or K90, 0.5 to 10 g / L of 5-bromo-4-chloro-3-indolyl-alpha-D-N-acetylneuraminic acid sodium salt or 5-bromo-4-chloro-3-indolyl-alpha-D-N-acetylneuraminic acid, and 0.1 to 5 g / L of diazonium salt. According to the sialidase detection test paper provided by the invention, after a sample is dropwise added into the test paper, direct color development can be realized, an independently packaged joint detection color development solution is not needed, and the test paper is simple and convenient to operate and easy to popularize.

A nutrition recommendation system incorporating results from mitochondrial enzyme testing includes a data aggregation module arranged to receive mitochondrial enzyme testing test data from at least one of citrate synthase, Complex I, Complex II, Complex II plus Complex III, and Complex IV testing. A data processing and recommendation module receives and processes that test data, recommending at least one protocol comprising nutrient suggestions for mitochondrial health.

The present invention discloses a nano-mimetic enzyme test strip containing two pairable PVY monoclonal antibodies and its application. The two pairable PVY monoclonal antibodies are PVY-2 and PVY-5; PVY-2 is secreted by the hybridoma cell line 4F1B2G11 with a preservation number of CCTCC NO: C2022281, and PVY-5 is secreted by the hybridoma cell line 4B4D8C3 with a preservation number of CCTCC NO: C2022282; PVY-5 is used as a labeled antibody and PVY-2 is used as a coating antibody to prepare a PVY nano-mimetic enzyme test strip. The test strip has a detection sensitivity of 10 for leaves infected with potato virus Y. ‑4 (w / v, g / mL). The research and development of this product will fill the gap in the field of nano-mimic enzymes in potato plant virus detection.

The present invention discloses a potato virus X nano-mimetic enzyme test strip and its application. The test strip comprises a backing plate and a sample pad, a conjugation pad, an NC membrane and a blotting paper sequentially attached to the backing plate; the sample pad is pressed against the conjugation pad and is conjugated with a nano-enzyme-labeled monoclonal antibody I; a quality control line and a detection line are provided on the NC membrane; the detection line is conjugated with a monoclonal antibody II paired with the monoclonal antibody I; the specificity is improved by selecting a unidirectional paired antibody; the test results show that the prepared test strip reacts only with PVX-infected plants and does not react with other viruses or healthy plants; the sensitivity test results show that the PVX nano-mimetic enzyme test strip has a sensitivity of 1:10 3 The virus can still be detected after dilution (w / v, g / mL) without false positives, so it can be used for potato virus X detection.

Various implementations of devices, systems, and methods for determining an individual's lactate threshold, a physical performance indicator, using saliva-based lactate measurements are described. A lactate threshold determination protocol can be established, measurements logged, and measurements interpreted to allow individuals without specific training and expertise to perform lactate threshold assessments and to access guidance on training and timing of re-assessment of lactate thresholds. A test strip including: a biosensor with an enzyme test can provide an enhancement layer on an electrode to control for osmolarity and / or pH variability of saliva samples.

This invention relates to the field of nucleic acid detection technology, and more particularly to a detection device, detection method, and application for probe cleavage detection. The detection device is based on a solid-phase carrier and sequentially includes a sample inflow area, a complete probe retention display area, and a probe cleavage product detection area along the sample flow path. The complete probe retention display area is equipped with a retention ligand that specifically binds to the target probe label, used to capture and indicate uncleaved complete probes in the test liquid; the detection area is equipped with a capture ligand that specifically binds to the probe cleavage products, used to detect the products generated by the probe cleavage reaction. By setting the complete probe retention display area before the detection area, a visual indication of whether a complete probe has entered the detection area can be provided, thereby judging the reliability of the detection results and reducing false positives or background signal interference caused by residual complete probes. The detection device may further include a pre-retention structure for complete probes for preliminary capture. This invention is applicable to various probe cleavage detection systems such as CRISPR lateral cleavage detection, RNase H enzyme digestion detection, and T7 endonuclease detection, and has the advantages of simple structure, compatibility with existing lateral chromatography processes, and high reliability of detection results.

The invention provides a heparinase detection method which comprises the following steps: a) diluting each reference substance of heparinase and a 2-O-sulfatase reference substance with a diluent to prepare reference substance solutions with certain concentrations, and recording the enzyme concentrations of the reference substance solutions as Cref-HepI, Cref-HepII, Cref-HepIII and Cref-2O respectively; b) determining the reference substance solution obtained in the step a) by adopting a high performance liquid chromatography method, recording retention time and peak area, and respectively recording the peak area of each enzyme as Aref-HepI, Aref-HepII, Aref-HepIII and Aref-2O; c) diluting a heparinase sample to be detected with a diluent to prepare a heparinase test solution with a certain concentration; d) determining the retention time and the peak area of each enzyme in the heparinase test solution by adopting a high performance liquid chromatography method, and respectively recording the peak areas of each enzyme in the test solution as A < supply >-HepI, A < supply >-HepII, A < supply >-HepIII and A < supply >-2O; and e) calculating the purity and the concentration according to a formula. The detection method can simultaneously detect heparinase I, heparinase II, heparinase III and impurity enzymes, and is simple, convenient, rapid and accurate to operate.

A nutrition recommendation system incorporating results from mitochondrial enzyme testing includes a data aggregation module arranged to receive mitochondrial enzyme testing test data from at least one of citrate synthase, Complex I, Complex II, Complex II plus Complex III, and Complex IV testing. A data processing and recommendation module receives and processes that test data, recommending at least one protocol comprising nutrient suggestions for mitochondrial health.