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

The invention relates to a smoke gas on-line monitoring system and a smoke gas on-line monitoring method, and aims at providing the smoke gas monitoring system and the monitoring method which have the advantages of being simple in structure, high in automation degree and accurate in monitoring. The system comprises a pitot pitometer, a smoke gas sampler, a particulate matter monitor, sampling pipelines and demarcating pipelines, wherein the pitot pitometer, the smoke gas sampler and the particulate matter monitor are all provided with anti-purging devices, signal receiving terminals of all the anti-purging devices are respectively connected with a central controller, and all the anti-purging devices are controlled by the central controller to regularly purge. Smoke gas collected by the smoke gas sampler successively passes through a first refrigerator, a gas filter, a second refrigerator and a membrane type filter, the collected smoke gas is cooled and filtered by the first refrigerator, the gas filter, the second refrigerator and the membrane type filter, and the rest smoke gas finally obtained is fed into a multicomponent gas analysis instrument to be analyzed and detected. For the system, whole calibrated pipelines and partial calibrated pipelines are also arranged, so that the analysis instrument in a line can be wholly calibrated and partially calibrated.

The invention discloses the drug application of epimedin C for treating diabetic liver injury, and belongs to the technical field of biomedicine. The present invention discloses for the first time that epimedin C can increase the level of high-density lipoprotein cholesterol in the liver of diabetic model animals, reduce the level of low-density lipoprotein cholesterol in the liver, alleviate the problem of lipid metabolism disorder, reduce liver index, and enhance superoxide dismutase in the liver , Glutathione peroxidase activity, reduce malondialdehyde content, improve liver oxidative stress state, maintain normal shape and structure of liver cells and tissues, reduce liver alanine aminotransferase and aspartate aminotransferase activity levels, and promote liver function repair, Therefore, it can be used to prepare medicines for treating diabetic liver damage. Epimedin C prepares a medicine for treating diabetic liver damage and uses it in the form of pharmaceutical preparations, including buccal tablets, coated tablets and hard capsules. The invention provides a basis for the treatment of diabetic liver damage, and also provides ideas for the deep development and utilization of epimedium resources.

The invention relates to a malicious code analysis and detection method based on dynamic semantic features. The method comprises the steps that (1) codes to be analyzed and detected in a malicious sample library are dynamically operated in a virtual environment, the operation process of the codes to be analyzed and detected in the malicious sample library is monitored, and the primitive characters of the codes to be analyzed and detected in the malicious sample library are extracted; (2) API name information standing for the semantic features of the codes is screened out; (3) an API sequence semantic feature set standing for the semantic features of the codes is established; (4) a semantic feature library with representative semantic features is selected; (5) similarity detection is carried out between the semantic feature set of the codes to be detected and the semantic feature library to obtain a detection result, namely, whether the codes to be detected are benign codes or malicious codes is detected. According to the malicious code analysis and detection method based on the dynamic semantic features, different semantic features can be established according to different samples, good universality is achieved, a method for selecting representative features is proposed, the semantic features of the codes can be expressed accurately, the analysis and detection on the malicious codes are more accurate, and detection cost is low.

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 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 primers and method for specific loop-mediated isothermal amplification (LAMP) detection of a genetically modified alfalfa strain J101 and an application of the method. The sequences of the primers are respectively shown in SEQ ID NO.1-SEQ ID NO.6. Aiming at the genetically modified alfalfa strain J101 from the Monsanto company to which the ministry of agriculture of China has not issued a security certificate of genetically modified organisms in agriculture, a group of specific primers are provided for the first time and a specific LAMP rapid detection system of the alfalfa strain J101 is successfully established by promoting LAMP with BstDNA polymerase and optimizing an LAMP detection system. The detection system is simple to operate, has strong specificity and high sensitivity, is accurate in detection results, has a minimum detection copy number of 10 and can be used for carrying out detection analysis and identification on the components of genetically modified alfalfa J101 rapidly and accurately.

The invention relates to application of a phthalocyanine-iridium metal complex to detection of silver ions. The phthalocyanine-iridium metal complex is dissolved in tetrahydrofuran or dichloromethane; then a to-be-detected substance is gradually added; an absorption spectrum is detected; and if the ratio A690 / A814 (i.e., the absorbance value of the complex at 690 nm to the absorbance value of the complex at 814 nm) of the phthalocyanine-iridium metal complex changes, it is proved that the to-be-detected substance contains silver ions, or otherwise, the to-be-detected substance does not contain silver ions. Compared with the prior art, the application provided by the invention has the advantages of rapidness in implementation, accuracy, low cost, high selectivity, etc.