32results about How to "Meet analysis" patented technology

The invention relates to a method for extracting and separating xanthohumol and flavone compounds. The method comprises the following steps of: leaching hops and a supercritical CO2 extraction residue thereof with an alcohol solution to ensure that flavone compounds, particularly xanthohumol, are sufficiently dissolved out; filtering to obtain a filter liquor after leaching, and decompressing anddistilling the filter liquor to obtain a concentrated liquor; centrifuging the concentrated liquor, taking an obtained supernate, and filtering by using a 0.45muL of organic film; removing partial impurities, and eluting with an eluant to elute the flavone compounds from macroporous adsorption resin; collecting effluent liquid and concentrating; and freezing and drying to obtain yellow powder. In the invention, the hops, the supercritical CO2 extraction residue, and the like are used as raw materials, particularly, a waste material which is the supercritical CO2 hop extract extraction residuein a hop product processing process is used as the raw material, thus the xanthohumol which has the main efficacy and is difficult to separate is independently extracted, and other flavone compounds rich in the hop waste material are also extracted; and the invention also provides a development approach for hops which cannot be used for beer brewing, thereby improving the resource utilization ratio and the added value of the hops and having important significance to prolonging the hop industrial chain.

The invention relates to an automatic gas sampling device and a using method thereof. The device provided by the invention comprises a shell, wherein the shell is internally provided with a gas channel system and a circuit system; the gas channel system comprises a first electromagnetic valve, a second electromagnetic valve, a pressure sensor, a tee joint, a six-way valve and a vacuum pump; the circuit system comprises the first electromagnetic valve, the second electromagnetic valve, the pressure sensor and a computer; the first electromagnetic valve and the second electromagnetic valve are electrically connected with the I / O (input / output) switch control unit of the computer; and the pressure sensor is electrically connected with the analogue / digital converter of the computer. The gas automatic sampling device provided by the invention can be widely applied to automatic sampling for gas chromatograph analysis of gas samples, prevents the pollution of environment on tested sample gases, and effectively improves the utilization ratio of sample gases and analyzing instruments.

The invention discloses an SAR image incident angle estimation method. The method comprises the following steps: firstly preprocessing an SAR image, acquiring an image section containing a building target from an SAR slang-range image, selecting two bright lines and intersection thereof of the building target in the image, determining a straight line passing through the intersection and parallel to an azimuth, wherein the two included angles between the straight line and the two bright lines are azimuth angles; estimating the azimuth angle value; and estimating the image incident angle value according to the quantitative relation between the image incident angel and the azimuth angle. The SAR image incident reference value is estimated by utilizing two bright lines of the building target in the SAR slant-range image and the quantitative relation between the included angle formed by two bright lines and the azimuth and the image incident angle, the SAR image incident angle parameter is precisely estimated under the condition that information such as flying height of the sensor is in absent, the SAR image analysis, parameter inversion and information extraction process can be satisfied, the application level of the SAR image is improved, and the method is especially suitable for the emergency relief with high timeliness demand.

The invention discloses a detection method for quickly measuring components of coarse coal gas and a related device, and mainly solves the problems of nonlinearity of carbon dioxide measurement, high TCD detection limit, high cost of multi-chromatographic column measurement system, long detection duration and the like of the conventional gas chromatographic analysis technology for the coarse coal gas. The device for quickly measuring the components of the coarse coal gas mainly comprises a purifying device, a chromatographic column separation device, a conversion device, a detector and a data processing unit. The purifying device is used for performing dust removal, desulfurization and dehydration on the coarse coal gas; the chromatographic column separation device is used for separating all the gas components; the conversion device is used for converting carbon dioxide and carbon monoxide; the detector and the data processing unit are used for realizing qualification and quantification. According to the detection method for quickly measuring the components of the coarse coal gas, multi-chromatogram combined calculation is carried out by taking methane as a bridge, so that the contents of all the components can be obtained by one step. The detection method and the device have the advantages of low equipment cost, short detection period, high measurement precision and wide application range.