133results about How to "High degree of enrichment" patented technology

The invention provides a process for treating domestic sewage with low CN (Carbon-Nitrogen) ratio by use of an anaerobic/aerobic SNDPR (Simultaneous Nitrification and Denitrification Phosphorus Removal) system capable of enriching phosphorus-accumulating bacteria and belongs to the field of biological sewage treatment. After the domestic sewage enters into an SNDPR SBR (Sequencing Batch Reactor), delayed anoxic/anaerobic stirring is carried out firstly, nitrogen removal by denitrification is performed on NO3<-1>-N and NO2<-1>-N left in last cycle by use of denitrifying bacteria and by utilizing organic carbon sources in the sewage, the anaerobic phosphorus release is realized by use of the phosphorus-accumulating bacteria and by utilizing the organic carbon sources in the sewage, and stored substances are synthesized in the cells of the phosphorus-accumulating bacteria. Due to delayed anaerobic treatment, after PAOs phosphorus release is finished, the denitrifying flora in the system is still capable of taking full advantage of organic matters in the sewage and storing the organic matters as an internal carbon source. Hereafter, aerobic aeration stirring is performed; as the concentration of dissolved oxygen is controlled, endogenous SNDPR of the denitrifying flora can be realized while phosphorus absorption of the phosphorus-accumulating bacteria is guaranteed. The method process for treating the domestic sewage with low CN ratio by use of the anaerobic/aerobic SNDPR system capable of enriching phosphorus-accumulating bacteria has the advantages that deep nitrogen and phosphorus removal of the sewage with low CN ratio is realized in one reactor, the process is simple, no external carbon source needs to be added, and the oxygen consumption and the energy consumption are reduced.

The invention provides a device and method for jointly capturing and recovering carbon dioxide and nitrogen in flue gas. The device comprises a flue gas treatment system, a first CO2 membrane separation unit, a second CO2 membrane separation unit and an N2 membrane separation unit, wherein the flue gas treatment system is provided with a treatment inlet and a treatment outlet, and is used for treating the flue gas; the first CO2 membrane separation unit is provided with a first gas inlet, a first carbon dioxide enriched gas outlet and a first high-pressure impermeable gas outlet, and the firstgas inlet is connected with the treatment outlet; the second CO2 membrane separation unit is provided with a second gas inlet, a carbon dioxide product gas outlet and a second high-pressure impermeable gas outlet, and the second gas inlet is connected with the first carbon dioxide enriched gas outlet; the N2 membrane separation unit is provided with a nitrogen enriched gas outlet, and a gas inletof the N2 membrane separation unit is connected with the first high-pressure impermeable gas outlet. The device has a high enrichment degree of carbon dioxide and can recover nitrogen, thereby avoiding resource waste.

The invention discloses a device and method for treating low-carbon urban sewage through synchronization of anaerobic ammonia oxidation coupling denitrifying phosphorus removal and endogenous denitrification, and belongs to the field of biological sewage treatment. Urban sewage enters an endogenous denitrification coupling dephosphorization SBR reactor for anaerobic stirring, energy is provided for glycogen inside denitrification glycogen-accumulating organisms decomposition cells, volatile fatty acid VFA in sewage is absorbed for synthesizing an internal carbon source PHA to be stored into the body, meanwhile, the denitrification phosphate-accumulating organisms are subjected to anaerobic phosphorus release, and VFA in the sewage is absorbed for synthesizing PHA to be stored into the body; after anaerobic stirring is finished, precipitation and drainage are performed, outlet water is drained into a middle water tank; then, water containing ammonia nitrogen and phosphate in the middle water tank is made to enter an integrated partial nitrification anaerobic ammonia oxidation SBR reactor, intermittent hypoxia aeration stirring is performed, and water is drained and drained into a water outlet tank; the outlet water of the integrated partial nitrification anaerobic ammonia oxidation SBR reactor is made to enter the endogenous denitrification coupling dephosphorization SBR reactor for hypoxia aeration stirring. According to the method, organic carbon sources in raw water are efficiently utilized, and the aeration rate is saved.

The invention discloses a method for wet separation and recovery of valuable metal from Kaldo furnace smelting slag. Kaldo furnace smelting slag is ground and dipped in water to remove soluble salt; copper, selenium and tellurium in the slag are leached out by using pressurization, oxidation and acid leaching for treatment to obtain copper sulfate solution, silver-selenium slag and copper telluride slag; tellurium, silver and selenium can be respectively recovered from the silver-selenium slag and the copper telluride slag; pressurized copper removing filter residue is mixed with hydrochloric acid for leaching out antimony and bismuth to finally obtain lead-silver slag capable of returning to a Kaldo furnace for smelting; and antimony and bismuth are further recovered from antimony-bismuth solution. According to the method, a mode of stepped removal and recovery of such metal as copper, antimony, bismuth, selenium, tellurium, silver and lead enriched in the Kaldo furnace smelting slag is adopted, compatibility of the method with a wet-fire combined flow for recovering rare and noble metal from Kaldo furnace treatment copper anode mud is excellent, the smelting slag is enabled to return to the Kaldo furnace for smelting so as to prevent adverse effects on the copper smelting by returning to a copper smelting system, and the lead-silver slag with higher enriching degree of such valuable metal as lead and silver is obtained.

The invention relates to a T7 peptide-modified active brain targeting nanometer drug delivery system and a preparation method thereof. A T7 peptide (with a sequence of CHAIYPRH) is used as a specificbrain targeting ligand, a PEG-PLGA diblock copolymer is used as a carrier of a nanometer drug delivery system, an insoluble drug molecule is entrapped through an emulsification solvent volatilizationmethod, and the insoluble drug molecule is connected to the T7 peptide through a difunctional NHS-PEG-MAL covalent bond so that the active brain targeting nanometer drug delivery system is constructed. The preparation method has simple processes and mild reaction conditions, utilizes a less amount of an organic solvent, effectively reduces the cytotoxicity of the nanometer carrier material, prolongs the circulation time in the body and improves biocompatibility. The T7 peptide-modified active brain targeting nanometer drug delivery system has strong active targeting ability, greatly improves the efficiency of the nanometer carrier drug passing through the blood-brain barrier, enriches the drug in the lesion tissue, improves the bioavailability of the drug, effectively controls the drug release and has a good application prospect in treatment and diagnosis of ischemic stroke and brain tumors.

The invention relates to a device and a method for continuously operation and reinforcement of biomembrane phosphate removing. The device is composes of a water inlet tank, a middle water tank and a biological filter tank, which can realize the continuous biological phosphate removing. The biological filter tank adopts the anaerobic/aerobic alternative adhesion growth system, uses the quartz sandas a biological carrier, is formed with a mixed biomembrane flora composed of phosphate accumulating bacteria, common heterotrophic bacteria, nitrobacteria and denitrifying bacterium, applies an adjustable time program to control the water inlet and outlet direction of the reactor and the connection of the reactor and the atmosphere so as to expose the biomembrane alternatively in the anaerobic/aerobic environments and applies the phosphate accumulating bacteria to remove the phosphate in the waste water in the anaerobic phosphate releasing-aerobic phosphate accumulating circulation. The system can simultaneously denitrides and remove the organic matters in the waste water.

The invention relates to an assay for transposase accessible chromatin using sequencing (ATAC-seq) method applied to zebrafish embryos. The method comprises the following steps: firstly, performing zebrafish embryo sample pretreatment; adding lysis buffer into the embryos; cracking the embryos in a water bath by using a wild-neck spearhead; performing a transposition reaction immediately and purifying DNA (Deoxyribose Nucleic Acid); determining a cycle number for library establishment by using a real-time fluorescence quantification method; directly performing library establishment and sequencing by using a further PCR (Polymerase Chain Reaction) method. A regulatory sequence on genome chromatin can be located and decoded by the ATAC-seq method and a DNase-seq (DNase I hypersensitive sites sequencing) method, but the steps in ATAC-seq are simpler, a required cell quantity is smaller, the ATAC-seq is more helpful under the situation that a large quantity of cells cannot be obtained, and the data enriching degree of the ATAC-seq is higher according to an assay result. The ATAC-seq method is further applied to zebrafish embryo cells. Thus, an effective and simple method is provided for the researches of changes of chromatin structures in early developing processes of living organisms and corresponding gene expression regulation and control researches.

The invention discloses a dual-targeting ultrasonic contrast agent and a preparation method thereof. The contrast agent is an Integrin alpha v beta 3/MCP-1 dual-targeting micro-vesicle, the dual-targeting micro-vesicle comprises a lipid shell and a gas inner core, and the external surface of the lipid shell is connected with an Integrin alpha v beta 3 monoclonal antibody and an MCP-1 monoclonal antibody. Through the combined application of different target spots, the targeting efficiency of the contrast agent can be effectively increased, and the degree of enrichment of the carrying genes in the target tissue can be greatly increased. In addition, the contrast agent disclosed by the invention is an ultrasonic contrast agent with double functions of development and treatment, and tumor images can be accurately observed in real time through an ultrasonic imaging system; and after gene transfection is realized through high-strength ultrasonic irradiation, the tumor gene treatment effect can be achieved.

The present invention relates to deuterated nucleoside derivative, particularly to a compound having a structure represented by a formula I or a pharmaceutically acceptable salt thereof. According to the present invention, the compound represented by the formula I has excellent pharmacokinetic properties and is expected to reduce the clinical dose so as to reduce the treatment and benefit more patients. The formula I is defined in the specification.

The invention discloses a method for preparing a photopolymerizable organosilicon polyurethane acrylate aqueous oligomer and a composition thereof. The method is based on the shortcomings of the current photopolymerizable organosilicon polyurethane acrylate aqueous oligomer, and the method comprises the following steps: synthesizing 2,2-bis(hydroxymethyl) butyl acrylate (HBA), and introducing thematerial into the oligomer molecule to make the polymer side chain is rich in unsaturated carbon-carbon double bonds; synthesizing one-terminated hydroxypolydimethylsiloxane (Si-OH), and introducing the substrate to the end of a main chain of the aqueous polyurethane acrylate oligomer so that the substrates facilitate enrichment on the surface of the material. Through the above molecular design, the problems of poor water resistance and low hardness of the aqueous photocurable material caused by the low double bond content and low crosslink density of the photocurable material are effectivelysolved, and the disadvantages that silicone chain is easily wrapped by the crosslinked network when is in the middle of the main chain so that the silicone is not enriched at the surface of the material, so that the surface hydrophobicity of the material can be effectively increased.

A tunnel-type multifunctional germinating apparatus for the long-grained nonglutinous rice is composed of a tunnel body, roller-type driving mechanism, delivering netted belt, and multifunctional tubular sprayer for atomizing, passivating, enzymolyzing and washing. Its working method features that the rice grains are spred on the delivering netted belt and then reciprocated in tunnel body while the liquid is prayed from said sprayer.

The invention relates to an exosome derived from a mesenchymal stem cell. The exosome is prepared by intermittent hypoxic stimulation of the mesenchymal stem cell. The exosome prepared from the invention has stronger tissue and organ ischemia-reperfusion injury protective effect, and the biological effect of unit exosomes is improved, and treatment of diseases such as ischemic heart disease is more facilitated.

The invention relates to a antihypelipidemic composition of fenugreek seed, which comprises (by weight ratio) fenugreek seeds extract 30-90%, mulberry leaf extract 5-40%, astragalus root extract 3-30%, the fenugreek seeds extract contains total fiber 1-80%, the mulberry leaf extract contains total flavones 0.1-50%, and the astragalus root extract is the aqueous extract or organic solvent of astragalus root or the aqueous extract AND organic solvent of astragalus root.

The invention discloses a chrysanthemum ester molecularly imprinted polymer preparing method and relates to a molecularly imprinted polymer preparing method. The chrysanthemum ester molecularly imprinted polymer preparing method includes the following steps that firstly, chrysanthemum ester type template molecules, styrene, halomethane, a cross-linking agent, a stabilizing agent and an initiating agent are evenly mixed and are stirred at the temperature of 50-80 DEG C after nitrogen leading and aerating; secondly, after a reaction is over, standing and layering are conducted, supernatant is removed, a lower-layer solid is eluted through a carboxylic acid and alcohol mixing solution, and chrysanthemum ester molecularly imprinted polymer powder is obtained. The preparing chrysanthemum ester molecularly imprinted polymer is in a powder form, powder-form polymers are in a microsphere shape, surface hole forming is obvious, the powder-form polymers can be directly used for extracting chrysanthemum ester pesticide residues from food media without being ground, and the recovery rate can reach more than 90 percent. According to the chrysanthemum ester molecularly imprinted polymer preparing method, processing does not need to be conducted again, the preparing process is simple, the technology is stable, and the preparing cost is low.

The invention relates to a thianaphthene-enriching method, in particular to a method for enriching thianaphthene from mixtures containing thianaphthene and naphthalene, specifically a method for enriching thianaphthene from coal-tar downstream products. The method comprises the following: a) a step of dissolving, which is to dissolve a mixture containing thianaphthene and naphthalene in binary alcohol serving as solvent and form solution at 60 to 80 DEG C; b) a step of crystallizing, which is to cool the solution obtained in a step a) to room temperature and crystallize naphthalene and other impurities from the solution obtained in the step a); c) a step of filtering, which is to filter and separate the naphthalene and the other impure crystals and obtain crystallization mother liquor; and d) a step of distilling, which is to distill the crystallization mother liquor to remove the binary alcohol and obtain enriched thianaphthene fractions. Different from the prior naphthalene solvent crystallization adopting the monohydric alcohol as solvent in general, the method significantly raises the enrichment degree of thianaphthene by adopting the binary alcohol as the solvent.