54results about How to "Analysis and detection are accurate" patented technology

The invention belongs to preservation agents of blood samples and in particular relates to a blood preservation agent for protecting free DNA. Every 100ml of the preservation agent comprises the following components: 6.0-8.8g of an anticoagulant, 0.1-2.0g of a natural preservative, 4.8-11.7g of a DNA enzyme inhibitor, 5.0-10.0g of glucose, 5.0-8.0g of an antihemolytic agent, 0.1-0.5g of purine and the balance of buffer solution, totaling 100ml. The preservation agent disclosed by the invention can achieve the effects of effectively preventing blood cells from rupturing to release genome DNA so as to cause pollution, preventing degradation of free DNA in the plasma and providing a stable environment for the free DNA in the plasma. Moreover, the preservation agent is safe and non-toxic to the human body and environment and is favorable for accurate detection and analysis of the free DNA.

The invention discloses a polycarbonate testing method, which comprises the following steps that: A) testing the volatile ingredients of polycarbonate, and determining the amount of volatile ingredients in the polycarbonate; B) testing a PDI (Poly-Dispersity Index) and pH (Potential of Hydrogen), and carrying out the second step when the amount of the volatile ingredients is small than 10, the PDIis smaller than 2.8 and a pH value is 6.2-7.3; C) carrying out through-machine evaluation testing: when MI (Melt Index)% is less than 10% and an IMP level is A or B or C, carrying out the third step;D) carrying out poaching testing; E) carrying out thermo-oxidative aging testing: when a mechanical property retention rate after poaching aging testing is greater than or equal to 75% and a thermo-oxidative aging testing color change [Delta]E value is smaller than 3, carrying out the fourth step; F) carrying out damp-heat aging testing; and/ or G) carrying out xenon lamp ageing testing. The invention aims to provide a simple polycarbonate detection process for enterprises, and whether polycarbonate conforms to the production requirements of production even special application occasions or not can be quickly and accurately detected and analyzed.

The invention discloses a method for analyzing and detecting trace metal ion impurities in dimethyl diallyl ammonium chloride (DMDAAC) monomers. According to the method, an organic solvent chelating extraction-flame atomic absorption spectroscopy method is adopted to measure the contents of multiple trace metal ions in DMDAAC monomers of a DMDAAC monomer solution with a high salt content, and avoids the difficult operation and result errors caused by direct injection of a sample with a high salt content. By utilizing the synergistic effect of a complexing agent, three metal ions (Fe, Cu, and Ni) can be complexed, extracted, separated, analyzed, and tested at the same time. The provided method has the advantages that the operation is simple and convenient, the analysis precision is high, and the contents of several trace metal ion impurities in DMDAAC monomers can be accurately, rapidly, and reliably analyzed and detected. The provide method has an important scientific meaning and industrial practical value for industrial manufacturing of high purity DMDAAC monomers, establishment of national/international standards of DMDAAC monomers, and research on the activity of DMDAAC monomers in polymerization reactions.

The invention relates to an analysis system for methane and non-methane total hydrocarbons and an analysis method thereof. The analysis system comprises a multi-channel injection valve, a quantitativetube, an air suction pump, a high carbon adsorption unit, a low carbon separation unit and a hydrogen flame ionization detector; the analysis system forms a first state, a second state and a third state which are all switchable through the multi-channel injection valve. The analysis system can achieve the purpose of continuously and accurately analyzing and detecting the methane and non-methane total hydrocarbons completely without oxygen interference.

The invention discloses a method for separating and enriching a trifluralin herbicide in soil. The method comprises the steps: mixing isooctyl acrylate, divinylbenzene, Span80 and C7H8, and adding azodiisobutyronitrile to form an organic phase; adding acrylamide into a polyvinylpyrrolidone/graphene oxide aqueous solution, and then adding nano SiO2 to form an aqueous phase; adding the aqueous phaseto the organic phase to form a high internal phase emulsion; drying, thermopolymerizing and washing the high internal phase emulsion, and carbonizing for 2 hours at the temperature of 600 DEG C; drip-washing a carbonized monolithic column with an acetonitrile aqueous solution, eluating the trifluralin herbicide target enriched on the carbonized monolithic column by an acetic acid/acetonitrile solution, and collecting an eluate; and blowing the eluate to dry with liquid nitrogen, redissolving with acetonitrile to obtain a to-be-measured solution, and completing the separation and enrichment ofthe trifluralin herbicide in the soil sample. The method has good extraction and enrichment ability for the trifluralin herbicide, and can be applied to extraction, enrichment and separation analysisof the trace trifluralin herbicide in the soil sample.

The invention discloses a medicinal application of epimedin C in treatment on diabetic liver injury, and belongs to the technical field of biological medicines. The invention discloses that epimedin Ccan improve the cholesterol level of high-density lipoprotein in the liver of a diabetic model animal for the first time, the cholesterol level of low-density lipoprotein in the liver is reduced, theproblem of lipid metabolism disorder is relieved, a liver index is reduced, the activity of superoxide dismutase and glutathione peroxidase in the liver is enhanced, the content of malondialdehyde isreduced, the oxidative stress state of the liver is improved, normal forms and structures of hepatocytes and tissues are maintained, the activity levels of glutamic-pyruvic transaminase and glutamicoxalacetic transaminase in the liver are reduced, and liver function repair is promoted, so that the epimedin C can be used for preparing medicines for treating diabetic liver injury. The epimedin C is used for preparing the medicine for treating diabetic liver injury in the form of a medicinal preparation, and comprises buccal tablets, coated tablets and hard capsules. The invention provides a basis for treatment on diabetic liver injury, and also provides an idea for deep development and utilization of epimedium resources.

The invention relates to the detection of protein glycosyl, in particular to an application of a compound as a blocking reagent for glycosyl on an antibody. To solve the problem of the interference ofthe glycosyl of a current antibody on detection, a compound used as a blocking reagent for the glycosyl on the antibody is provided, and the compound is selected from one of alpha-semicarbazide, acetylhydrazine, sulfur acetohydrazide, thiosemicarbazide, asparagine hydrazide, tyrosine hydrazine, N (benzyloxycarbonyl)-L-valyl-L-tyrosine hydrazide, or N (benzyloxycarbonyl) glycinic hydrazide. The compound used as the blocking reagent for the glycosyl on the antibody has the advantages of being capable of conducting petreatment of antibodies, avoiding binding of plant lectins to antibodies, guaranteeing accurate quantification of the glycosyl on captured proteins, being simple in the process of blocking the antibodies with one step reaction needed, shortening the reaction process of existingblocked antibodies, and significantly reducing costs.

The invention discloses a kit. The kit comprises a probe, the probe is fixed on a solid matrix or is free in a solution, and the probe can specifically identify at least one part of regions in every gene of seventeen genes in table 1. The invention also provides a use of the kit, a method for constructing a target region sequencing library, a sequencing method, a method for detecting the variation of the target region, and a device for detecting the variation of the target region. The kit and/or the method or the device are/is used to once, simply, conveniently and highly-specifically obtain relevant gene sequences of stomach cancer and accurately detect and analyze the relevant gene sequences in order to make the detection and analysis result used for medication guidance and/or risk predication of the stomach cancer in an auxiliary manner.

The present invention relates to the technical field of chemical analysis, and discloses a chemical analysis test method for rapid determination of high content manganese in aluminum alloy. The chemical analysis test method comprises the following steps of 1, weighing: weighing 0.2000-0.2500 g of an alloy sample in a 300 mL conical flask, adding 15 mL of phosphoric acid and 5 mL of nitric acid, completely decomposing the sample on a high temperature electric furnace, and taking down the sample when no large bubble exists on the liquid surface and white smoke is generated, 2, oxidizing, adding 1 mL of perchloric acid, continuously placing on the electric furnace, heating and dissolving, and heating until the liquid level is completely calm, and 3, cooling, taking down, cooling to 60-70 DEG C, adding sulfuric acid, diluting with water to 70-80 mL, and fully shaking to dissolve the viscous material. The method is short in detection time, accurate in detection result, low in cost, simple to operate, few in interference elements and suitable for rapid analysis of the stokehole, the used equipment is simple, the cost is low, and rapid and accurate analysis and detection of high-content manganese in the aluminum alloy are met.

The invention relates to a gas chromatography system and method for detecting detailed composition of vehicle gasoline. The system comprises a first detection channel and a second detection channel, the first detection channel comprises a first sample inlet, a first non-polar chromatographic column and a first detector; the first sample inlet is communicated with an inlet of the first non-polar chromatographic column, and an outlet of the first non-polar chromatographic column is communicated with an inlet of the first detector; the second detection channel comprises a second sample inlet, a second non-polar chromatographic column, a central cutting assembly, a third sub-channel and a fourth sub-channel; the third sub-channel comprises a damping column and a second detector which are communicated in sequence, and the fourth sub-channel comprises a polar chromatographic column and a third detector which are communicated in sequence. The system disclosed by the invention is compact in structure and can be used for measuring the detailed hydrocarbon composition and the content of added components of the automotive gasoline.

The invention relates to the technical field of medical images, in particular to a common CT computer imaging omics stone component analysis system and method, and the system comprises a central processing system, a data collection unit, a data analysis module, printing equipment and a mobile phone terminal. The input end of the central processing system is unidirectionally and electrically connected with a system firewall, and the data collection unit is connected with the system firewall through a wireless network. Calculus components are analyzed through CT computer imaging omics and compared with data in a database, the defects of an existing calculus analysis method are overcome, and the calculus analysis method has the advantages that calculus can be detected and analyzed more accurately and effectively, data are prevented from being lost in the transmission process, and then detection errors can be reduced. The problem that at present, infrared spectrum detection analysis is mainly adopted for calculus component analysis, the infrared light absorption band characteristic of a calculus sample is not high enough, and certain errors exist in detection of some calculus components is solved.