38results about How to "Applicable extraction" patented technology

The invention discloses a preparation process of a macroporous adsorption resin for precious metal and rare metal extraction, relates to the technical field of macroporous adsorption resin processing, and includes the following process steps: (1) preparation of white spheres; (2) alkylation reaction of white spheres . In the present invention, cinnamaldehyde is used as a monomer instead of styrene commonly used in the field, and resin white balls are prepared by cooperating with a crosslinking agent divinylbenzene, a porogen toluene and an initiator; and 3-hydroxycaproic acid is used as an alkylating agent, The alkyl carboxylic acid group is introduced into the cinnamaldehyde benzene ring structure of the resin white ball through the alkylation reaction, and the prepared macroporous adsorption resin is more suitable for the extraction of precious metals and rare metals. When the precious metal gold is extracted, the recovery rate of gold can reach more than 99%.

The invention discloses a method for extracting genomic DNA from mature and old tung oil tree leaves, relating to the separation and extraction technology of genomic DNA from plants in the molecular biology experiments. The method mainly comprises the steps of leaf tissue sample pretreatment, cell disruption, non-DNA component extraction, DNA precipitation, ion removal and tissue sample cyclic extraction. The method has the following advantages and positive effects: polyphenols, polysaccharides and other secondary metabolites in which the leaves are rich can be effectively removed by using washing liquid to pretreat the tissue samples of the mature and old tung oil tree leaves once; the step of tissue sample cyclic extraction is absent in the traditional methods for extracting genomic DNA; one tissue sample can undergo genomic DNA extraction four times, thus obviously increasing the yield of the genomic DNA; and the genomic DNA with high quality and high yield can be extracted from the mature and old leaves stored at low temperature for a long time by the method. The method is suitable for extraction of genomic DNA from mature and old tung oil tree leaves.

The invention discloses a method for extracting rice bran polysaccharides. According to the method, after carrying out the steps of decoction, centrifugation, concentration, impurity removal, precipitate removal and the like, the target product, namely the rice bran polysaccharides, is prepared from supernatant. According to the method, the rice bran polysaccharides in rice bran are prevented from being combined with other ingredients by adopting a Ca(OH)2 solution, so that the extraction ratio of the rice bran polysaccharides is increased and reaches 7.6-8.5%, and the purity of the rice bran polysaccharides is improved and reaches 68.1-70.3%; meanwhile, impurities, such as protein and the like, are removed by adopting an adsorption clarifying technology. The method has the characteristics of simplicity and convenience in operation, environmental friendliness, low energy consumption, low cost, applicability to industrial production, and the like, and is suitable for extracting the rice bran polysaccharides from the rice bran.

The invention discloses an extraction method of a genomic DNA of a plant leaf of a traditional Chinese medicine and relates to a separation and extraction technology of genomic DNAs of plants in molecular biology experiments. The method mainly comprises the following steps of: pre-treating a tissue sample; crushing cells; eluting impurities; separating out DNAs; and removing ions. The method disclosed by the invention has the advantages and positive effects that (1) cell nucleuses are released from cell walls by means of a cutting method, then secondary metabolites are eluted to obtain pure cell nucleuses, and finally, the genomic DNA is extracted from the cell nucleuses; (2) liquid nitrogen cannot be used for extracting the cell nucleuses by means of the cutting method; (3) impurities in the cytoplasm are repeatedly eluted, so that pure cell nucleuses can be obtained effectively; (4) samples can be obtained from samples which are stored at a low temperature for a long time and fresh leaves; and (5) the method is suitable for extracting DNAs of all plant leaves of traditional Chinese medicines. The extraction method is suitable for extracting the genomic DNA of the plant leaf of the traditional Chinese medicine.

A Gaussian model-based energy extraction method for overlapping ultrasonic echoes of rolling bearings. First, the continuous pulse ultrasonic echo signal is obtained to extract the single-pulse ultrasonic echo; Ultrasonic echo energy expression; then according to the least squares method to construct the fitness function of the particle swarm algorithm to obtain the final estimated parameter vector; combined with the single-pulse ultrasonic echo waveform and the double ultrasonic echo Gaussian model, through the time domain waveform and wavelet transform Estimate the initial value of the particle swarm algorithm; then input the particle swarm algorithm, control the particle swarm algorithm to iterate continuously according to the fitness function until convergence; substitute the final estimated amplitude and bandwidth into the parameterized ultrasonic echo energy formula to obtain the energy of the two echoes Repeatedly extracting the energy of each pulse ultrasonic echo, calculating the energy coefficient of the ultrasonic echo, and obtaining the UEER curve; the present invention does not depend on the separation of the echo interface, and can adaptively extract the echo energy.

The invention relates to the technical field of new chemical materials, and specifically discloses an amino acid ionic liquid and its preparation method and application. The amino acid ionic liquid is composed of alanine and acetamide, the raw materials are green and environmentally friendly, cheap and easy to obtain, the ionic liquid has a low melting point and a wide liquid range. The preparation method of the amino acid ionic liquid is obtained by grinding raw materials and performing solid phase reaction under ultrasonic conditions. The amino acid ionic liquid of the invention has a simple preparation process, and the application process can be designed and adjusted according to requirements, and is suitable for remediation of heavy metal, especially cadmium-contaminated soil.

The invention discloses a feature extraction method based on an image neighborhood structure tensor equation. The method comprises the following steps: 1) determining a lower boundary of a two-dimensional code; 2) performing region extraction by use of a region growth method; 3) computing a feature value based on the structure tensor; and 4) fitting other three obtained discrete boundaries by use of the least square method to obtain a final standard datamatix two-dimensional code region. The neighborhood boundary of the two-dimensional code is determined through the region growth method and the feature computation of the structure tensor by use of the method disclosed by the invention; compared with the method for determining each boundary region, the method disclosed by the invention is simpler, and the determined boundary is more accurate; and the method is suitable for the extraction of the two-dimensional code region.

The invention discloses a method for extracting an effective component from an ethanol part of acid litchi. The method comprises the following steps: baking and crushing acid litchi, soaking in 95% ethanol for 0.2-0.4 hour, extracting for 80-100 seconds with microwave power of 400-600W, and concentrating to obtain an extract; recovering the ethanol, and dissolving the extract with n-butyl alcohol, filtering, concentrating at reduced pressure to prepare a clear extract, namely the total active component of acid litchi, and recovering the n-butyl alcohol, wherein the acid litchi is acid litchi kernels, acid litchi leaves, acid litchi stems, acid litchi barks and acid litchi fruit peels. The method has the characteristics of simple and effective extraction and purification and high extraction rate; the extract is definite in component and high in purity, and can be used for preparing preparations which have better curative effect and are convenient to take; a solvent for extraction is absolute ethyl alcohol, the step of configuring concentration is cancelled, the time is saved, and the recovered solvent can be used in other aspects. The method is economic, energy-saving and environment-friendly, is advantageous to production performance, and has good economical benefit, social benefit and ecological benefit.

The present invention discloses a method for extracting astaxanthin yeast, yeast extract and glucan from yeast. According to the method, cellulose is used for enzymolysis of yeast, then an organic solvent is added for dark shaking extraction and solid-liquid separation, and the resulting liquid is astaxanthin solution, obtained solid is mixed evenly with water, yeast extraction enzyme and inorganic salts are added for reacting at 55 DEG C, the yeast extract is obtained by solid-liquid separation and drying of obtained liquid, obtained solid is mixed evenly with alkaline liquor for reacting and solid-liquid separation, and obtained solid is washed and dried to obtain the yeast glucan. The method is short in time and mild in conditions; astaxanthin extraction rate is high, and the yeast extract and the glucan and other a plurality of products can be obtained, so that Phaffia rhodozyma utilization value can be improved, economic efficiency is increased, and a solid foundation is lay for industrial production.

The invention discloses an index inquiry method for running information of regional urban buses, and belongs to an intelligent traffic technology. The index inquiry method comprises the following steps of: acquiring urban bus station data and bus global positioning system (GPS) data, and removing ineffective data from the bus GPS data; performing logic hierarchy division on urban bus stations to obtain an index tree comprising all stations, and generating a corresponding index sequence for each station; adding index fields to the urban bus GPS data according to regions where the urban bus GPS data are positioned according to the index sequence information; and supplying an inquiry interface to a user, and searching data according to an inquiry condition and the index sequences which are input by the user on the inquiry interface, and returning inquired vehicle information to the user in the form of a file. The invention also discloses an index inquiry system for the running information of the regional urban buses. By the method and the system, the time and space characteristics of bus traffic vehicle data are considered; and the method and the system are particularly suitable for extraction of regional urban bus data.