34results about How to "Effectively remove interference" patented technology

The invention discloses a method for detecting catecholamine in blood plasma by liquid chromatography tandem mass spectrometry. The method comprises the following steps of preparing a standard product, separating by liquid chromatography, detecting by a mass spectrum, drawing a standard curve, and detecting the catecholamine in the blood plasma. The method has the beneficial effects that the catecholamine is detected by innovatively applying a high-flux liquid chromatography tandem triple quadrupole mass spectrograph; protein is precipitated by acetonitrile, dansyl chloride is used for performing derivative reaction, and the liquid chromatography tandem triple quadrupole mass spectrograph is used for detecting after extraction, so that the pretreatment steps are simple, the interference of a matrix in the blood plasma is effectively removed, and the specificity is good; after the derivatization of dansyl chloride, the detection sensitivity is effectively improved; the high-flux liquid chromatography tandem rod mass spectrograph is used for detecting, three types of catecholamine, including dopamine, epinephrine and norepinephrine, in the blood plasma can be quantitatively and accurately detected; the detection time is short, the flux is high, the detection sensitivity is high, the specificity is good, and the cost is low.

One embodiment of the present specification provides a method for resource allocation by a serving cell base station, for supporting interference removal. The resource allocation method may comprise the steps of: determining whether or not UE has an interference removal function; and if the UE has the interference removal function, allocating resource blocks (RB) to the UE through a negotiation with an interfering cell with respect to the allocation of the resource blocks (RB). Herein the resource blocks (RB) of the interfering cell, which are co-located with the resource blocks (RB) according to the negotiation, may be allocated to another UE by the interfering cell without being divided.

The invention belongs to the field of analysis and detection, and relates to a method for extracting and detecting frisee polyphenols (levan). An inventor adopts a GracePure<TM> SPE C18-Max column produced by GRACE Company to filter a sample in the extraction of frisee plant samples. The column can remove the polar matters from a water solution, nearly cannot absorb sugar, and can effectively reduce the detection background. A common HPLC (high performance liquid chromatography) instrument is adopted, but a PREVAIL Carbohydrate ES special sugar column produced by the GRACE Company is adopted and has good sugar separation function. The sugar column is an amino sugar column bonded by polystyrene and divinylbenzene, so the problem of disturbing other amino columns is avoided, the chemical degradation is avoided, and the stability is realized at room temperature and under the gradient elution condition; an ELSD (evaporative light-scattering detector) is used for the sugar detection, and one complete set of extraction and detection flow of the polyphenols (levan) of the frisee plant samples is firstly established.

The invention belongs to the technical field of remote sensing and mapping, and specifically relates to a non-vegetation-covered area airborne LiDAR data echo intensity value correction method. The method includes following steps: performing primary correction of an echo intensity value based on the flying height and the laser point elevation value, and performing homogenization on the influences of the laser transmission distance on the echo intensity value; calculating the tendency angle values of laser points point by point by setting a threshold determination condition and taking the plane distance value, the elevation value and the echo intensity value as references based on LiDAR data after primary correction; and calculating the reflection angle with the combination of the tendency angle and an incidence angle, and performing correction calculation on the echo intensity value of the original LiDAR data again. According to the method, the technical problem of difficult realization of airborne LiDAR data echo intensity value correction of non-vegetation surface features, especially inclined surface features in the prior art is solved, the airborne LiDAR data echo intensity value can better reflect the surface feature media attributes, and the application values thereof in surface feature classification and identification are improved.

The invention discloses a cell-penetrating peptide and particles thereof coating hydrophobic molecules and a preparation method and an application of the particles and belongs to the technical field of nano biomaterials. The amino acid sequence of the cell-penetrating peptide is X-Y-(r-R)3-(R)-2, wherein X is a peptide chain with at least three amino acid residues and at most 20 amino acid residues; the amino acids in X are separately selected from phenylalanine, leucine, isoleucine, alanine, tryptophan, proline, methionine or histidine; Y is a peptide chain with at most 20 any amino acid residues; r is D arginine; R is L arginine. The amphipathic cell-penetrating peptide and hydrophobic molecules are co-assembled to be self-assembled to form nanoparticles through the hydrophobic interaction of the noncovalent molecules. The nanoparticles can enable the hydrophobic molecules to penetrate cytomembranes quickly with low cell toxicity into the cells. The nanoparticles have a good application prospect in the fields of cytomembrane fluorescence imaging, time resolution imaging, hydrophobic drug coating and the like.

The invention discloses a method for detecting residual quantity of dibromochloropropane and 1, 3-dichloropropene in vegetables and fruits by gas chromatography-mass spectrometry. The method comprisesthe following steps: pretreatment, headspace (HS) sample introduction, GC-MS/MS (Gas Chromatography-Mass Spectrometry-Mass Spectrometry) determination and quantification by an external standard method. According to the method, the detection limit of dibromochloropropane is as low as 0.4 mu g/kg, the recovery rate is 87.08%-104.86%, and the RSD value is 5.28%-8.29%; the detection limit of 1, 3-dichloropropene is as low as 2 mu g/kg, the recovery rates of cis/trans isomers are 88.82%-119.45% and 87.20%-116.55% respectively, and the RSD values are 3.49%-8.14% and 1.15%-9.72% respectively. The method is easy to operate, environment-friendly, high in sensitivity and good in reproducibility.

The invention discloses a variable speed gear fault signal extraction method, diagnosis method and system based on adaptive time-varying comb filtering, and a storage medium. The diagnosis method comprises the following steps of acquiring a gear vibration signal and a rotating speed signal under a variable rotating speed, performing time-varying comb filtering on the gear vibration signal by using an adaptive time-varying comb filter to obtain a time-varying comb filtering signal, performing equal-angle resampling on the time-varying comb filtering signal according to the rotating speed signal to obtain an angular domain resampling signal, and performing spectral analysis on the angular domain resampling signal to obtain an order spectrum, and diagnosing the gear fault under the variable rotation speed according to the modulation side frequency order around the meshing order in the order spectrum. According to the method, the gear meshing vibration frequency component and the modulation side frequency component containing the gear fault information under the variable rotating speed are accurately extracted, meanwhile, interference of other signal components is removed, and the gear fault characteristics under the variable rotating speed can be effectively highlighted.

The invention discloses a method and a system detecting cloth of a sewing machine. The method includes the steps of: when an infrared-emitting diode oppositely projecting to an infrared photosensitivediode in an infrared light receiving circuit is started, receiving a first sampling signal sent by the infrared light receiving circuit; when the infrared-emitting diode is shut, receiving a second sampling signal sent by the infrared light receiving circuit; generating first infrared light energy corresponding to the first sampling signal and second infrared light energy corresponding to the second sampling signal, and calculating a difference between the first infrared light energy and the second infrared light energy; and according to a comparison between the difference and present infrared light energy, determining whether a corresponding position of the infrared photosensitive diode has the cloth. The method and the system provided by the invention may effectively remove interferenceof infrared light in an environment on cloth detection, reduce the time for the cloth detection, and are helpful to control a length of a thread chain when the sewing machine trims a thread; and withthe arrangement of the infrared photosensitive diode, a light intensity may be sensed more accurately, and thus the accuracy for the cloth detection is improved.

The invention belongs to the technical field of bioinformatics and biology, and particularly relates to a candidate causal mutation site gene localization method based on an M2 group. According to the method provided by the invention, positioning of candidate causal mutation sites is accelerated by only researching the M2 generation, and background variation can be effectively removed through mutual comparison among M2 groups in the M2-seq under the condition that wild type variation information of a mutant plant is not known. In addition, signal interference caused by rejection linkage of adjacent mutant alleles can be effectively removed by using the absolute value of the [delta]SNP index, so that causal mutation in a target gene can be identified favorably.

The invention discloses a quantitative detection method for <14>C in urine, which belongs to the technical field of radiohygiene. The method comprises the following steps of (1) measuring a certain volume of urine sample, adding potassium persulfate, heating, stirring, converting organic carbon and inorganic carbon in the urine sample into carbon dioxide, purging the generated carbon dioxide through carrier gas, and absorbing with alkali liquor, and (2) adjusting the pH value of the absorption liquid with ammonium chloride, adding a saturated calcium chloride solution to generate calcium carbonate precipitate, standing, carrying out suction filtration, and drying, and (3) grinding the prepared calcium carbonate precipitate powder into powder by using a mortar, weighing a proper amount of powder, and carrying out <14>C activity measurement by using a liquid scintillation counter. The method provided by the invention has the advantages of high accuracy, high recovery rate and stable detection result, and can meet the analysis of the activity concentration of <14>C in the urine sample.

The invention discloses a cleaning fluid for a pathologic cell sheet preparation technology. The cleaning fluid is characterized by comprising the following components in percentage by mass: 0.01 to 0.50 percent of adhesive, 10 to 60 percent of a fixing agent, 0.10 to 1.5 percent of an activator, and the balance of ultrapure water. The invention further discloses a using method of the cleaning fluid for the pathologic cell sheet preparation technology. The cleaning fluid disclosed by the invention is used for treating liquid-based cell sheets, and has the advantages that the microscopically background cleanliness is extremely high, and cells cannot fall and the like; the treated cell sheets can achieve the effects of uniformity, consistency, clear color, clean background, no non-specific staining, and zero sheet falling rate.