206results about How to "High development value" patented technology

The invention discloses a preparation method of metal halide inorganic perovskite quantum dots. The method includes the steps of firstly, dissolving metal halide salt BX2 and AX in DMSO, and adding surface active agents; secondly, rapidly injecting the mixed liquid in reaction solvent; thirdly, making BX2 and AX rapidly react under the effect of the surface active agent to generate the ABX3 type metal halide inorganic perovskite quantum dots of different morphologies. According to the method, in the low-temperature solution method system, by using different surface active agents and reaction solvent for changing the morphologies of the metal halide inorganic perovskite quantum dots, the performance of the metal halide inorganic perovskite quantum dots is regulated and controlled, and the method has profound significance in constructing high-performance full-solution photoelectric devices.

The invention belongs to the technical field of preparation of functional high polymer materials, and particularly relates to a natural high polymer material modified adsorption resin for the adsorption of heavy metal ions and a preparation method for the adsorption resin. The heavy metal ion adsorption resin comprises the following components in percentage by weight: 10.0 to 15.0 percent of chitosan (Chit), 25.0 to 50.0 percent of acrylic acid (AA), 20 to 45 percent of acrylamide (AM), 0.1 to 0.4 percent of N,N-methylene-bisacrylamide (NMBA), 1.0 to 3.0 percent of potassium persulfate (KPS) and 0.0 to 15.0 percent of wood meal. By the heavy metal ion adsorption resin, Pb2+ can be efficiently adsorbed and separated, the cost of a chitosan modified adsorption resin can be lowered, adsorption capacity can be improved, the number of reuse times can be increased, and the adsorptive selectivity of the resin can be improved.

A method for abstracting minerals from serendipities belongs to the technical field for abstracting metal compounds from ores or ore concentrates through a wet method. The steps of the method are based on a conventional method for using an acid leaching method to abstract magnesium and silicon from the serendipities and compound alternative and circulating acid leaching is carried out for the serendipities, namely the serendipities is acid-leached. The method comprises: processing after dividing the acid leaching into acid leaching solution and acid leaching slag according to leaching targets and adding acid leaching additive which contains fluorine to intensify acid-leaching reaction, thereby, the extraction rate of the magnesium from the serendipities can be increased to more than 99%, and simultaneously the purity of silicon dioxide in filter residue is increased to more than 90%, and repeated reuses of pickle liquor and cleaning mixture in the whole acid leaching process are realized through circulating and alternative acid leaching. The whole technical process does not produce discard solution, waste residue and other contaminants completely, the cost of production is lowered, and the developing value of the serendipities is increased.

The invention relates to a virtual learning environment intelligent question and answer method based on a stacked Bi-LSTM network and collaborative attention, and belongs to the technical field of natural language processing and virtual reality. The method comprises the following steps: S1, constructing a knowledge base and preprocessing data; S2, performing feature extraction and vector representation: configuring a co-attention mechanism and an attention mechanism in the model for constructing the stacked Bi-LSTM network; S3, considering the position and direction of the question and answerpair space vector at the same time, and harmonizing the cosine similarity and the Euclidean distance to calculate the matching degree between the question and answer pair vectors; And S4, establishinga virtual learning environment based on the Unity 3D platform and introducing a network model to realize intelligent question answering of the virtual classroom in the specific domain. According to the method, the deep network model is combined with multiple types of attention mechanisms, interaction understanding and representation of questions and answers at a deeper level are achieved, and meanwhile the application range of intelligent questions and answers is widened through introduction of a specific domain virtual classroom.

The invention relates to an anti-hepatitis B virus composition taken from fresh dandelion and an application of the anti-hepatitis B virus composition in preparation of an anti-hepatitis B virus drug and belongs to the field of traditional Chinese medicines. The anti-hepatitis B virus composition provided by the invention comprises a fresh dandelion polysaccharide component, a phenolic acid component and a flavone component and is characterized in that the weight ratio of the fresh dandelion polysaccharide component to the phenolic acid component to the flavone component is (2-40): (3-70): (2-50). According to an optimized scheme, the phenolic acid component takes caffeic acid, chlorogenic acid and isochlorogenic acid A as typical ingredients; the flavone component takes galuteolin, quercetin and luteolin as typical ingredients; and the weight ratio of the caffeic acid to the chlorogenic acid to the isochlorogenic acid A to the galuteolin to the quercetin to the luteolin is (0.25-10): (2-40): (0.25-20): (0.5-20): (0-10): (1.5-20). According to the invention, the fresh dandelion is taken as raw material, effective ingredients are separated, purified and enriched by macroporous resin, the effective ingredients are mixed to obtain the fresh dandelion anti-hepatitis B virus composition, a process is simple and convenient, related diseases caused by hepatitis B viruses can be effectively treated, cost is low, and mass production can be achieved.

The invention discloses a compound insecticide of bacillus thuringiensis, verticillium lecanii and aconite alkaloid and a preparation method thereof. The compound biotic insecticide is mainly mixed through the fermentation liquor of bacillus thuringiensis and the meristem of the verticillium lecanii or blastospore and the aconite alkaloid with proper auxiliary agent according to certain proportion, wherein the mass percentage of the main medicine and the auxiliary agent respectively accounts for 50 percent to 90 percent and 10 percent to 50 percent. The compound insecticide has the advantagesthat the compound insecticide is broad-spectrum, has control effect to various crop pests, and particularly has obvious effect to homoptera pets, lepidoptera pets and coleopteran pets; the desinsection speed is high; the lasting period is long; pets are difficult to develop drug resistance; the compound insecticide is safe to people and animals, environment and natural enemies; the manufacturing process is simple, the material sources are wide, and the cost is low; and the preparations are multiple, and the application field is wide.

The invention discloses a method for assisting in cultivating Yuanbao chicken by the aid of traditional Chinese medicinal materials. The method includes that different Chinese herbal ingredients are added in day grains at the different growth and development stages of the Yuanbao chicken. The method has the advantages that the each ingredient comprises more than 10 Chinese herbs, accordingly, main effects of tonifying the spleen and the kidney and benefiting the lever and auxiliary effects of invigorating the stomach, improving digestion, moistening the lung and tonifying qi, storing essential qi, activating the blood, relieving heat and removing toxic materials can be realized, purposes of invigorating pulse, tonifying spleen qi, smoothing the qi and the blood and adjusting balance of the physiological functions of various organs of bodies can be achieved, and effects of preventing epidemic diseases, strengthening the bodies and improving the productivity can be realized; the traditional Chinese medicinal materials are used as feed additives in the day grains for the Yuanbao chicken, the addition amount of the traditional Chinese medicinal materials is only 3.0-5.0%, accordingly, the usage amount and the cost are low, and a benefit is significant; the palatability of feed can be improved, so that a good food calling effect can be realized for the Yuanbao chicken; raw materials of the feed are widely available and are cheap, a production technology is simple, medicinal and edible effects can be realized by the cultivated Yuanbao chicken, the Yuanbao chicken can be cultivated on a large scale, and accordingly the method has higher development value.

The invention discloses a method for preparing a high-purity astaxanthin extract. The method comprises the following steps in sequence: (1) taking a crude extract of astaxanthin, diluting with absolute ethyl alcohol, adding a NaOH- absolute ethyl alcohol solution with concentration of 6-12 mmol/L, and then placing at a dark place for saponification at room temperature; (2) adding the obtained saponification solution into a methylene dichloride-water solution, standing for layering, and concentrating the lower layer liquid to obtain an extractum; (3) dissolving the obtained extractum into a solution with the volume ratio of normal hexane to acetone being 4 to 1, and applying onto a silicagel column; sequentially performing the following elution: taking the solution with the volume ratio of normal hexane to acetone being 4 to 1 as the elution solution I for elution to obtain a yellow fraction, taking the solution with the volume ratio of normal hexane to acetone being 1 to 1 as the elution solution II for elution to obtain an orange fraction, and eluting with methyl alcohol till the silicagel column is colorless; and (4) performing vacuum concentration on the orange fraction, thereby obtaining an aubergine extractum which is the high-purity astaxanthin extract.

The invention relates to a high-strength concrete composite expanding agent for a steel tube and a preparation method thereof. The high-strength concrete composite expanding agent comprises the raw material by weight percentage as follows: 30-50% of light calcined magnesium oxide, 8-30% of calcium oxide, 30-60% of zeolitized crushed crude pearlite, and 0.1-0.3% of industrial stearic acid. The water demand for hydration of light calcined magnesium oxide is small in use level, and the light calcined magnesia has the delayed expansion performance and can compensate volume shrinkage of concrete at an older age. The calcium oxide is fast to hydrate and can compensate self-shrinkage and cooling shrinkage of concrete in an earlier stage. The zeolitized crushed crude pearlite can improve the working performance of concrete, so that concrete has good peaceability, and calcium oxide and magnesium oxide expanding components are distributed uniformly in the concrete, so that the problem of nonuniform expansion of concrete is solved. The high-strength concrete composite expanding agent is stable in long-term expansion performance, and expansion and shrinkage as well as strength are in synergetic development. The water required for expansion is little, concrete in a sealed state expands continuously and stably, and the working performance of concrete can be improved. The high-strength concrete composite expanding agent is particularly suitable for preparing steel tube concrete.

The present invention relates to new medicinal application of levocarnitine as one kind of known compound and its derivative. Levocarnitine or its derivative is used as active component combined with one or several excipients and prepared via conventional process into tablet, capsule, oral liquid, injection, etc. for preventing and assisting treatment of high altitude diseases. The present invention is superior to available hormone medicine and diuretic medicine, which result in side effects, and hyperbaric oxygen therapy, which is inconvenient and has relatively low safety.

The applicant provides a long-chain non-coding lncRNA-OD1 which is formed by transcribing a gene located at a chromosome 18: chr18: 77343316-77345492, hg19, and the length of the gene sequence is 2177bp. The applicant also provides application of the long-chain non-coding lncRNA-OD1 in preparation of a reagent, a kit or a gene chip for predicting osteoporosis. In the invention, through a gene chip technology, a bioinformatics technology and a molecular biological technology, whether abnormal expression occurs in an LncRNA in an osteoporosis process can be determined, and the function of the LncRNA in the pathogenetic process of osteoporosis is understood, so that a new clue is provided for early diagnosis of osteoporosis, and a molecular mechanism of occurrence of osteoporosis is enriched favorably.

The invention relates to a composite material used in soil remediation and a preparation method thereof. The remediation material is a porous compound material with through pores, and formed by crosslinking carboxymethylcellulose or sodium salt components thereof and chitosan with the mass ratio of being 0.5-9.5:1; the average pore size of the pore is 20-200 mum; and the water absorption rate among the pores is 2000 percent to 8000 percent of the self weight of the material. In preparation, the carboxymethylcellulose or the sodium salt components thereof and the chitosan are mixed with water under the condition that pH is 2 to 5 and the temperature is 30 to 60 DEG C so as to form a clear and transparent sol system; then the system is arranged in a molding mold, the temperature is reduced to minus 20 DEG C for fully congealing; and finally the porous composite material is obtained after freeze drying. The porous composite material can be directly inoculated with phosphate-solubilizing bacterium and nitrogen-fixing bacterium, has the functions of water absorption and water maintenance properties and higher density for bearing the microorganisms of phosphate-solubilizing bacterium and/or nitrogen-fixing bacterium and the like, and good biocompatibility and biodegradability; and degradation products have no pollution to the environment, can be recycled for use in ecological environment, and can improve soil structure by mixing with soil so as to absorb and maintain water and enhance the soil fertility.

The invention discloses a preparation method of pure rice-koji added with Chinese medical herbs and application thereof. The preparation method is characterized by comprising the following steps of: inoculating aspergillus flavus QJ into a PDA (Potato Dextrose Agar) slant culture medium, culturing at 25-30 DEG C for 7-10 days, selecting slant colonies with uniform surface growth and thick spore layers, transplanting onto the PDA slant culture medium again, culturing at 25-30 DEG C for 5-7 days to obtain slant strains, and preserving at 4 DEG C for 15-30 days; carrying out amplification culture on the aspergillus flavus QJ, preparing spore suspension of the aspergillus flavus QJ, adding Chinese medical herbs into spread cooled steamed rice, and culturing medicinal koji for 3-4 days under the conditions that temperature is 35-40 DEG C and humidity is 90-95% so as to obtain the ure rice-koji added with the Chinese medical herbs, wherein the diastatic power is 979.348-1738.99 U/g dry koji; and the liquefaction force is 21.37-59.43 U/g dry koji. Compared with the rice-koji without Chinese medical herbs, the diastatic power of the medicinal koji is increased by 25.89-41.61%; the liquefaction force of the medicinal koji is increased by 31.97-56.122%; therefore, the pure rice-koji has great development value and wide market prospect.

The invention discloses a method for taking 3-aryl-5-methyl butyrolactone compound as acetylglucosyl bromide, and relates to the acetylglucosyl bromide prepared from a chemical compound. The method comprises a method for resisting the activity of tobacco mosaic viruses, a method for killing the activity of funguses in vitro and a method for killing the activity of the funguses in vivo. The suppression rate of (Ia-1)-(Ia-9) and (Ib-1)-(Ib-9) in the 3-aryl-5-methyl butyrolactone compound to the tobacco mosaic viruses is over 60 percent under the concentration of 500 mu g/mL, and the 3-aryl-5-methyl butyrolactone compound is high in the fungicidal activity to 14 funguses. Compared with the prior art, the method disclosed by the invention has an obvious progress and extremely outstanding economical benefits.

A deep fermentation and culture method for Brazilian cordyceps mycelia features that the Brazilian cordyceps seed is used as initial fungus, a new culture medium is used, and the cordyceps mycelia are cultured at proper temp. stirring speed and basicity and then dried for preparing high-purity cordyceps mycelia powder. Its advantage is large production scale.

The invention discloses an extraction preparation method for sodium ferrous chlorophyllin and sodium ferrous chlorophyllin prepared through the extraction preparation method. The extraction preparation method comprises the following steps: (1) selecting suaeda salsa at the vigorous growth period, taking tender stems and leaves, cleaning and dehydrating; (2) grinding the stems and leaves of the dehydrated suaeda salsa into pulp, adding low temperature cellulase into pulp materials, uniformly stirring, and performing enzymolysis for 8-20 hours; (3) adding an extraction solvent, performing two-time extraction in which shaking extraction is carried out in a shaking device for 0.5-1 hour each time, and performing solid-liquid separation, so as to obtain a chlorophyll extracting solution; (4) dropwise adding a NaOH solution into the extracting solution for saponification reaction, then, performing vacuum rectification, extracting by using petroleum ether, and taking the sodium chlorophyllin solution at the lower layer; (5) adjusting the pH value of the hydrochloric acid to be 2-3, dropwise adding a ferrous ion aqueous solution, and taking solid sediments; (6) dissolving the solid sediments by using acetone, then, dropwise adding a NaOH solution for salt formation, and performing vacuum drying at low temperature, so as to obtain the sodium ferrous chlorophyllin.

The invention provides a preparation method of soft shrimps, which comprises the following steps of: 1) selecting fresh and non-browning shrimps as raw materials, removing trash fishes, trash shrimps and silt impurities, and cleaning the shrimps; 2) pre-boiling; 3) preparing seasoning liquid, and seasoning; 4) boiling down; 5) mixing the seasoning, and frying the shrimps to be cooked; 6) baking; 7) mixing accessories; 8) bagging; 9) sterilizing and cooling; 10) preserving heat and detecting. The method provided by the invention is used for preparing snack food with the raw materials of the shrimps which are high-yield and low-value living marine resources generated along the coast of our country. The prepared products are special in flavor, rich in nutrition and delicious in taste, so that the products are suitable for public taste. With the adoption of the method, comprehensive utilization of ocean resources is greatly improved, economic value of the ocean resources is improved, and simultaneously, a new way for comprehensive utilization of the shrimps in the Yellow Sea is created.

The invention relates to an information material file storage box with a secret, high-guarantee and real-time tracing function. The information material file storage box comprises an MCU module, a fingerprint module, a promoting module, a self-destroying control module, a damp-proof module, a positioning module, a fixed clamp and a self-destroying material, wherein The MCU module controls the damp-proof module to perform constant-temperature control and dehumidifying control to eliminate influences of environment temperature and humidity in a transportation process, so that the temperature is controlled to be about the standard temperature of 20 DEG C, and humidity is controlled to be about 50% of optimum humidity; the fingerprint module, the prompting module and the positioning module are combined, so that the box is controlled to open safer; moreover, a state of the box is known in real time through a corresponding hand ring or mobile phone; while finding that the box is missing, information transmitting staff can immediately perform positioning and tracing on the information file box in a mode of enabling the worn hand ring or mobile phone to match with a remote control terminal; the self-destroying control module can be combined with the self-destroying material to realize a self-destroying function, so that information files are destroyed from the moment that box is self-destroyed and opened only within 2 seconds, and therefore, greater loss caused by missing of the information material file storage box can be prevented.

The invention discloses an N-acetylneuraminic acid aldolase as well as a coding gene and an application thereof. The N-acetylneuraminic acid aldolase provided by the invention is a protein of the following a) or b): a) a protein consisting of an ammonia acid sequence represented by a sequence 2 in a sequence table; and b) a protein with an activity of N-acetylneuraminic acid aldolase, wherein the ammonia acid sequence represented by the sequence 2 is subjected to substitution and/or deletion and/or addition of one or more of ammonia acid residues so as to obtain the protein derived by the protein in the a). According to the invention, a new gene SananA for coding the N-acetylneuraminic acid aldolase is obtained, and the gene SananA is cloned to a prokaryotic expression vector 6HisT-pRSET plasmid, so that a high-efficiency expression of a N-acetylneuraminic acid aldolase protein (SaNanA) can be carried out in escherichia coli. The obtained recombinant N-acetylneuraminic acid aldolase protein provided by the invention can catalyze N-acetylmannosamine and pyruvic acid to generate N-acetylneuraminic acid, so that the N-acetylneuraminic acid aldolase protein has high enzyme activity, application foreground and development value.