55results about How to "Low background signal" patented technology

The present invention provides an oligonucleotide probe, which comprises an oligonucleotide molecule and a label bound to the oligonucleotide molecule, wherein the oligonucleotide molecule comprises: a hairpin capable of forming a hairpin structure A self-complementary region, a target nucleic acid recognition region, and a target nucleic acid recognition-like region, the label (a) providing a detectable signal when the probe is in a non-hybridizing form but having a reduced or substantially detectable signal when the probe hybridizes to a complementary nucleic acid Provides no detectable signal, or (b) provides a detectable signal when the probe hybridizes to a complementary nucleic acid, but provides a reduced or substantially no detectable signal when the probe is in non-hybridized form.

The invention discloses an hsa-miR-9 (Human Serum Albumin-Micro Ribonucleic Acid-9) detection kit and an hsa-miR-9 detection method based on AllGlo probe fluorescent quantitative PCR (Polymerase Chain Reaction) and relates to MicroRNA (Micro Ribonucleic Acid). The kit is provided with a kit body, a partition, an exogenous reference bottle, a stem-loop reverse transcription reagent bottle and a real-time fluorescent quantitative PCR reagent bottle. The detection method comprises the steps of extracting miRNA from a sample, adding 5 microliters of exogenous reference cel-miR-39 (Caenorhabditis Elegans-Micro Ribonucleic Acid-39) at a concentration of 5n mol provided by the kit after full lysis of the sample, and swirling and shaking in case of a sample of serum / plasma sample or other body fluids, adding no exogenous reference cel-miR-39 in case of a sample of a cell or a tissue, performing reverse transcription on miRNA to form cDNA (Complementary Deoxyribonucleic Acid) with a stem-loop reverse transcription reagent provided by the kit, performing real-time PCR amplification on cDNA with a real-time fluorescent quantitative PCR reagent provided by the kit, and setting a reasonable threshold and a baseline for result analysis by synthesizing various data given by an analytical instrument.

The invention relates to microRNA, particularly an hsa-miR-363 detection kit based on AllGlo probe fluorescence quantitative PCR (polymerase chain reaction) and a detection method thereof. The kit is provided with a box body, partitions, an exogenous reference bottle, a stem-loop reverse transcription reagent bottle and a real-time fluorescence quantitative PCR reagent bottle. The method comprises the following steps: extracting miRNA (microribonucleic acid) in a sample, wherein if the sample is serum / plasma or any other body fluid, after the sample is sufficiently cracked, 5 mu L of 5n mol exogenous reference cel-miR-39 provided by the kit is added and vortex oscillation is performed, and if the sample is a cell or tissue sample, no exogenous reference cel-miR-39 is needed; carrying out real-time PCR amplification on the stem-loop reverse transcription reagent reverse transcription miRNA provided by the kit as cDNA (omplementary deoxyribonucleic acid) by using the real-time fluorescence quantitative PCR reagent provided by the kit; and setting reasonable thresholds and base lines according to data given by a comprehensive analysis instrument, and carrying out result analysis.

The invention discloses a liquid mass spectrometry detection method for textile salicylate anti-ultraviolet finishing agents, which comprises the following steps: preparing a sample to be tested into a sample solution to be tested; The gradient standard working solution is prepared into a gradient standard working solution; the gradient standard working solution is injected into the liquid chromatography-tandem mass spectrometer, the positive and negative ion multiple reaction monitoring mode is measured, and the standard curve equation is made; the sample solution to be tested is detected according to the above method, so as to obtain the Contents of 7 kinds of salicylate anti-ultraviolet finishing agents in samples. The liquid chromatography-tandem mass spectrometry method is qualitative, quantitative, and highly sensitive, and is suitable for the detection of salicylate UV-resistant finishing agents in textiles.

The invention relates to microRNA, particularly an hsa-miR-520a-3p detection kit based on AllGlo probe fluorescence quantitative PCR (polymerase chain reaction) and a detection method thereof. The kit is provided with a box body, partitions, an exogenous reference bottle, a stem-loop reverse transcription reagent bottle and a real-time fluorescence quantitative PCR reagent bottle. The method comprises the following steps: extracting miRNA (microribonucleic acid) in a sample, wherein if the sample is serum / plasma or any other body fluid, after the sample is sufficiently cracked, 5 mu L of 5n mol exogenous reference cel-miR-39 provided by the kit is added and vortex oscillation is performed, and if the sample is a cell or tissue sample, no exogenous reference cel-miR-39 is needed; carrying out real-time PCR amplification on the stem-loop reverse transcription reagent reverse transcription miRNA provided by the kit as cDNA (omplementary deoxyribonucleic acid) by using the real-time fluorescence quantitative PCR reagent provided by the kit; and setting reasonable thresholds and base lines according to data given by a comprehensive analysis instrument, and carrying out result analysis.

The invention discloses an hsa-miR-146 (Human Serum Albumin-Micro Ribonucleic Acid-146) detection kit and an hsa-miR-146 detection method based on AllGlo probe fluorescent quantitative PCR (Polymerase Chain Reaction) and relates to MicroRNA (Micro Ribonucleic Acid). The kit is provided with a kit body, a partition, an exogenous reference bottle, a stem-loop reverse transcription reagent bottle and a real-time fluorescent quantitative PCR reagent bottle. The detection method comprises the steps of extracting miRNA from a sample, adding 5 microliters of exogenous reference cel-miR-39 (Caenorhabditis Elegans-Micro Ribonucleic Acid-39) at a concentration of 5n mol provided by the kit after full lysis of the sample, and swirling and shaking in case of a sample of serum / plasma sample or other body fluids, adding no exogenous reference cel-miR-39 in case of a sample of a cell or a tissue, performing reverse transcription on miRNA to form cDNA (Complementary Deoxyribonucleic Acid) with a stem-loop reverse transcription reagent provided by the kit, performing real-time PCR amplification on cDNA with a real-time fluorescent quantitative PCR reagent provided by the kit, and setting a reasonable threshold and a baseline for result analysis by synthesizing various data given by an analytical instrument.

The invention discloses a method suitable for simultaneously detecting 9 N-nitrosamines in food contact rubber products. The method comprises the following steps: utilizing a sample to be tested to establish a migration system to obtain a migration extract; utilizing the migration extract to prepare a sample solution to be tested to obtain a supernatant / filtrate; preparing 9 N-nitrosamines into a standard solution to further prepare a standard working solution with the gradient of 0.01-0.40 [mu]g / mL; injecting the gradient standard solution and the supernatant / filtrate into a liquid Chromatogram-tandem mass spectrograph, and testing the cation multi-reaction monitoring model to finally obtain the respective contents of 9 N-nitrosamines in the sample to be tested. The 9 N-nitrosamines are N-Nitrosodimethylamine, N-Nitroso-ethyl methylamine, N-Nitrosomorpholine, N-Nitrosopiperidine, N-Nitrosopyrrolidine, N-Nitroso-diethylamine, N-Nitrosodibutylamine, N-Nitrosodi-n-propylamine and N-Nitroso-diphenylamine.

The invention discloses an hsa-miR-513b (Human Serum Albumin-Micro Ribonucleic Acid-513b) detection kit and an hsa-miR-513b detection method based on AllGlo probe fluorescent quantitative PCR (Polymerase Chain Reaction) and relates to MicroRNA (Micro Ribonucleic Acid). The kit is provided with a kit body, a partition, an exogenous reference bottle, a stem-loop reverse transcription reagent bottle and a real-time fluorescent quantitative PCR reagent bottle. The detection method comprises the steps of extracting miRNA from a sample, adding 5 microliters of exogenous reference cel-miR-39 (Caenorhabditis Elegans-Micro Ribonucleic Acid-39) at a concentration of 5n mol provided by the kit after full lysis of the sample, and swirling and shaking in case of a sample of serum / plasma sample or other body fluids, adding no exogenous reference cel-miR-39 in case of a sample of a cell or a tissue, performing reverse transcription on miRNA to form cDNA (Complementary Deoxyribonucleic Acid) with a stem-loop reverse transcription reagent provided by the kit, performing real-time PCR amplification on cDNA with a real-time fluorescent quantitative PCR reagent provided by the kit, and setting a reasonable threshold and a baseline for result analysis by synthesizing various data given by an analytical instrument.