20 results about "Tris hydroxymethylaminomethane" patented technology

This invention discloses a denitrification agent for low-temperature denitrification and its preparation method, belonging to the field of denitrification technology. The denitrification agent is prepared using diatomaceous earth as the matrix framework, compounded with calcium chloride, calcium bicarbonate, chitosan, sodium lignosulfonate, and TRIS (tris(hydroxymethyl)aminomethane). The components synergistically optimize the pore structure. Chitosan and sodium lignosulfonate achieve self-assembly through hydrogen bonding and electrostatic attraction. Nitrogen oxides are removed through a dual action of alkaline absorption and electrostatic adsorption. The TRIS can be regenerated and reused after alkali washing. This invention's denitrification agent solves the problems of high reaction temperature, poor low-temperature activity, low efficiency in removing low-concentration nitrogen oxides, and easy ammonia escape in traditional SCR denitrification technology, and can meet the requirements for NO removal in flue gas from power plants. x ≤15mg / m 3 It has ultra-low emission indicators, and features excellent low-temperature activity, high denitrification efficiency, and recyclability. It is suitable for denitrification treatment of low-temperature flue gas in power plants, etc.

The application discloses a kind of composite super-hydrophobic paper based on alkyl ketene dimer and metal polyphenol network and preparation method thereof, belong to functional paper-based material field.The method is first immersed in 0.25%~5% alkyl ketene dimer emulsion in cellulose paper, is dried at 90~110 DEG C and is cured 48-96h to prepare modified paper;Then, the pH is 8.0-9.0 of tris-hydroxymethyl aminomethane hydrochloride buffer solution, hydrochloric acid dopamine is dissolved in the buffer solution to form dopamine solution, and the concentration is 0.25~20mg / mL of metal ion solution;Finally, the modified paper is immersed in dopamine solution and metal ion solution in turn, and is dried to obtain composite super-hydrophobic paper.The obtained composite super-hydrophobic paper uses cellulose paper-based material as substrate, and hydrophobic layer and metal polyphenol network layer are formed on the surface in turn, the composite paper has super-hydrophobic performance, water barrier performance and photo-thermal response performance, the preparation process is simple, and is suitable for waterproof packaging, self-cleaning surface, anti-icing and deicing and photo-thermal antibacterial and other fields.

This invention provides a method for preparing carbon quantum dots, their application in the detection of 4-nitrophenol and curcumin, a concentration detection method, and a visualization detection method. The method involves mixing tris(hydroxymethyl)aminomethane and phloroglucinol in a solvent, followed by heating in a reaction vessel to obtain the carbon quantum dots. This invention provides a simple and low-cost method for preparing carbon quantum dots, enabling rapid and low-cost detection of 4-NP and curcumin, thus meeting the detection needs for both.

This invention discloses a method for detecting adiponectin in human serum using a polydopamine-modified wire mesh carbon electrode, specifically relating to the field of adiponectin detection technology. The method involves preparing a 2 mg / mL dopamine hydrochloride solution using a 10 mM tris(hydroxymethyl)aminomethane hydrochloride buffer solution (pH=8.5) and adding it dropwise onto the surface of the working electrode. A polydopamine-modified layer is formed by electropolymerization within a range of -800 mV to 600 mV using cyclic voltammetry. A conductive layer of a poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid complex is then coated. Adiponectin antibodies are then immobilized on the surface of the modified layer via covalent binding of amino and quinone groups. After specific binding with a serum sample, the oxidation peak current change is read out from -100 mV to 350 mV in a buffer detection medium containing 5 mM ferricyanide redox pairs, and the concentration is output from a standard curve. This method improves the density of antibody immobilization sites and inhibits non-specific serum adsorption, enhancing signal stability and sensitivity, and enabling rapid, low-cost quantitative detection of trace amounts of serum.

The application discloses a method for preparing trimethylolamine by a continuous flow method, and comprises the following steps: mixing polyformaldehyde and alkali to obtain a mixed solution 1; mixing a nitromethane solution and the mixed solution 1 to form a reaction solution, and then introducing the reaction solution into a micro-channel continuous flow reactor to obtain a mixed solution 2 after reaction; adjusting the flow rates of the mixed solution 2 and hydrogen, and then mixing the gas-liquid mixture into a gas-liquid mixer at the inlet of a micro-packed bed continuous flow reactor, passing through a catalyst bed layer of the micro-packed bed continuous flow reactor to react, and then adjusting the temperature through a reactor heat exchange cavity of the micro-packed bed continuous flow reactor to obtain a crude product after reaction, and then performing post-treatment and purification to obtain a trimethylolamine product; and the catalyst comprises a supported Pd catalyst, a supported Ni catalyst or a Raney nickel catalyst. The preparation method of the application enables the solid catalyst to fully contact with the mixed solution 2 and hydrogen, compared with a conventional intermittent hydrogenation preparation method, the reaction time is shortened, the product purity is high, the safety is high, and the method is beneficial to industrialized scale production.

The present invention relates to a tris(hydroxymethyl)aminomethane hydrochloride preparation method and, specifically, to a high-purity tris(hydroxymethyl)aminomethane hydrochloride preparation method, which does not use a main solvent, and thus is economical and eco-friendly. The tris(hydroxymethyl)aminomethane hydrochloride preparation method of the present invention exhibits a high conversion rate and selectivity, and provides an economical and eco-friendly preparation method by establishing a solvent recovery and reuse system that recirculates a hydrocarbon solvent, which is an antisolvent, during crystallization, and minimizes solvent loss.

The application belongs to the technical field of single-atom catalyst preparation, and particularly relates to a preparation method of a p-block main group metal single-atom catalyst, a product and application. The preparation method comprises the following steps: dissolving dopamine hydrochloride in water, and mixing and reacting with tris-hydroxymethyl aminomethane, a silica template and a p-block main group metal salt to obtain a precursor; and annealing the precursor and removing the silica template to obtain the p-block main group metal single-atom catalyst. The metal ion is limited in the metal-polydopamine unit through the "coordination-limitation" method, which can not only increase the metal loading of the precursor, but also prevent the migration of metal atoms to form nanoparticles or clusters during pyrolysis. Through the silica template, a nitrogen-doped carbon substrate with a large specific surface area and hollow mesoporous structure can be prepared, which provides abundant defect structures and a large number of active sites, and improves the loading of single atoms.

This invention provides a novel method for preparing UHPC wind turbine towers and its application. The UHPC, by weight, comprises: 60 parts cement, 14-18 parts silica fume, 17-22 parts quartz sand, 20-25 parts fly ash, 2-3 parts modified polyvinyl alcohol fiber, 0.8-1.5 parts high-efficiency water-reducing agent, 0.5-0.8 parts dispersant, and 20-23 parts water. The method for preparing the modified polyvinyl alcohol fiber is as follows: 121g of tris(hydroxymethyl)aminomethane is added to 600mL of water, stirred to dissolve, and then the pH is adjusted to 8.0 with hydrochloric acid. The final volume is then adjusted to 1000mL with water. L, obtain buffer solution; take 3g catechol and 3g 1,6-hexanediamine, add to buffer solution, mix well to obtain functional solution; take 5g polyvinyl alcohol fiber, add to functional solution, shake for 24h, take out and wash with water, dry at 40±5℃ to obtain deposited fiber; take 10g SiC-SiO2 modified particles, sonicate for 15min and disperse in 1000mL water to obtain SiC-SiO2 particle dispersion; immerse the deposited fiber in SiC-SiO2 particle dispersion, stir at 120r / min for 2h, take out and wash with water, dry at 40±5℃ to obtain. This invention ensures that the prepared UHPC has excellent mechanical properties while improving chloride ion penetration resistance and durability.

This invention relates to the field of biological sample preservation technology, specifically to a room-temperature preservation solution for bacterial RNA from sputum samples of tuberculosis patients. Each 100 mL of the RNA preservation solution comprises the following ingredients: 2-5 g tris(hydroxymethyl)aminomethane, 0.5-1.3 g mucin digester, 20-30 g guanidine isothiocyanate, 0.1-0.3 g hexadecylpyridine chloride, 0.5-1.2 g ethylhexene dicysteine, 20-40 mL fixative, 1-5 g stabilizer, 0.1-0.5 g inorganic salt, 0.3-0.6 g surfactant, and 0.1-0.5 g preservative. The preservation solution provided by this invention can effectively liquefy sputum samples at room temperature, meeting the requirements for long-distance sample transportation. The RNA quality of sputum samples treated with the preservation solution of this invention is suitable for various subsequent molecular detection methods, possessing significant application value and promising prospects for widespread application.

This invention discloses a neutral dissociation agent and its preparation method for detecting the content of 25-hydroxyvitamin D in human blood samples, belonging to the field of biomedical detection technology. The dissociation agent is composed of disodium EDTA, sodium dodecyl sulfonate, dithiothreitol, hexadecyltrimethylammonium bromide, and hydroxypropyl-β-cyclodextrin dissolved in 50 mM tris(hydroxymethyl)aminomethane buffer, with the mass-volume ratios of each component being 0.5%-1%, 0.5%-1%, 0.2%-0.5%, 0.2%-0.5%, and 0.2%-0.5%, respectively. During preparation, each component is dissolved according to the steps, and the pH is adjusted to 7.4. This dissociation agent exhibits mild dissociation conditions, does not damage protein activity, has high dissociation efficiency, and is non-corrosive and non-toxic. The detection results show high specificity and sensitivity, with a coefficient of variation ≤6%. It can be directly integrated into automated detection processes and is suitable for large-scale clinical and research applications.

The application provides a controllable co-deposition modification method of electrochemically driven polydopamine and carboxylated carbon nanotubes on the surface of carbon fibers, and belongs to the technical field of carbon fiber surface modification. The process comprises the following steps: dissolving trimethylolaminomethane Tris in a mixed solution of equal proportions of anhydrous ethanol and deionized water to prepare a Tris buffer solution; slowly adding carboxylated carbon nanotubes CNT in batches, and obtaining a carboxylated CNT dispersion after ultrasonic treatment; slowly adding hydrochloric acid dopamine PDA and uniformly mixing to obtain a mixed dispersion containing PDA and carboxylated CNT; under ultrasonic conditions, immersing the fixed continuous carbon fibers in the mixed solution, so that the PDA forms an initial deposition layer on the surface of the fibers; performing electrochemical co-deposition treatment, completing the synergistic co-deposition of carboxylated CNT and PDA on the surface of the carbon fibers, and forming a synergistic interface layer rich in active functional groups. The process is simple and controllable, and the synergistic interface layer of PDA and CNT formed can significantly improve the interfacial bonding performance of the carbon fibers and the resin matrix.

This invention discloses a silver-based alloy material and its preparation method, belonging to the field of alloy material preparation technology. It is used to solve the technical problems of the wide melting temperature range and insufficient spreading performance of existing silver-based alloy materials. This invention uses silver-copper-tin-zinc composite precursor powder as a base, introduces silver-deposited copper-tin composite particles, silver-loaded copper-zinc-tin flake precursors and cerium-containing silver-copper-tin composite particles, constructs silver-based multi-component composite precursor powder through the action of tris(hydroxymethyl)aminomethane / dopamine, and obtains silver-based multi-component alloy powder and silver-based alloy material through staged heat treatment, thereby helping to reduce the melting temperature range and improve the spreading coefficient.

The application provides a three-dimensional porous silicon@carbon nanosphere structure material taking lithium nitrate as a template and a lithium supplement, a preparation method of the three-dimensional porous silicon@carbon nanosphere structure material, a lithium ion battery negative electrode and a battery, and compared with the prior art, the SiO2 small balls are synthesized by using ethanol, deionized water, ammonia water and tetraethyl silicate, the porous Si is obtained by hot reduction of the SiO2 small balls, the porous Si nanospheres and the tris-hydroxymethyl aminomethane are dispersed in water, the pH is adjusted by using a hydrochloric acid solution, the hydrochloric acid dopamine is continuously added, the lithium nitrate is finally added, the Si@C composite material with a three-dimensional porous structure is obtained after calcination, washing and drying, the template method further forms the porous structure on the surface of the carbon layer, the composite material can provide more active sites in the charging and discharging process, the porous structure effectively relieves the volume expansion problem, and the added lithium nitrate also plays a role of the lithium supplement, the supplemented lithium ions make the battery have better stability in the battery charging and discharging process.

The application discloses a sodium ion battery metal oxide composition positive electrode material, a preparation method thereof and a sodium ion battery, the positive electrode material comprising modified NaMn 1‑x Al x O2, a conductive agent, a binder and a dispersing agent; the modified NaMn 1‑x Al x O2 is prepared by the following steps: dissolving zirconyl nitrate and sodium nitrate in a solvent to obtain a mixed solution, adding tetraethyl orthosilicate and ammonium dihydrogen phosphate, adjusting pH and stirring to form a sol, adding NaMn 1‑x Al x O2, removing the solvent to obtain a gel, drying and heat treating to form an inner layer, dispersing the obtained product in a tris-hydroxymethyl aminomethane hydrochloride buffer solution, adding dopamine hydrochloride and phenylboronic acid to react, performing solid-liquid separation after the reaction is completed, drying and carbonizing the product to obtain the modified NaMn 1‑x Al x O2; the sodium ion battery has excellent cycle performance under fast charging with the positive electrode material as the positive electrode.

The invention belongs to the technical field of blood product preparation, and particularly relates to a solution for blood product preparation and application of the solution in preparation of vWF factor and VIII factor products. The solution for blood product preparation comprises a first eluent for ion exchange chromatography and a diluent for diluting the product obtained by ion exchange chromatography. The first component contains sodium citrate, alanine, glycine and polysorbate 80; the latter is a solution containing trihydroxymethyl aminomethane, alanine, glycine, mannitol and cane sugar. According to the scheme, the technical problem that the specific activity, the stability and the like of the vWF factor and the factor VIII obtained by a cellulose-based plasma cryoprecipitation process are difficult to effectively improve can be solved, and the product quality and the production efficiency of the VIII / vWF factor can be effectively improved when the method is applied to production practice; the method is a technical key point for improving a cellulose-based cryoprecipitation preparation process and a three-step chromatography process for VIII / vWF factor preparation, and has ideal popularization and application prospects.

This invention provides a naphthalene sulfonate-modified coal-water slurry dispersion stabilizer, its preparation method, and its application. By weight, the raw materials include: 22-38 parts of rosin polyether-modified naphthalene sulfonate condensate, 1.5-3.5 parts of borate ester dynamically cross-linked cellulose microgel, 0.8-2.0 parts of auxiliary stabilizer, 5-10 parts of polycarboxylate-based water-reducing agent, 8-15 parts of sulfonated lignin, 0.8-2.5 parts of isomeric tridecyl alcohol polyoxyethylene ether, 5-10 parts of antifreeze and humectant, 2.5-5 parts of sodium gluconate, 0.4-1.0 parts of tris(hydroxymethyl)aminomethane-hydrochloric acid buffer pair, 0.15-0.6 parts of polyether-modified polysiloxane, and 30-50 parts of deionized water. The synergistic effect of the components in this invention allows the prepared coal-water slurry dispersion stabilizer to effectively regulate the rheological and stability properties of coal-water slurry, adapting to the performance requirements of coal-water slurry in biomass dense molding fuel processing.

The application belongs to the technical field of intelligent nanometer materials, and relates to a shape memory micro-topological structure nanometer fiber membrane as well as a preparation method and application thereof. The preparation method is as follows: a fiber membrane is prepared through electrostatic spinning with trifluoroethanol as a solvent; after the fiber membrane is stretched and fixed, in-situ polymerization is carried out in a tris-hydroxymethyl aminomethane buffer to obtain a left-handed polylactic acid / polyhydroxybutyrate valerate@polydopamine fiber membrane; and the surface micro-topological structure is regulated by controlling the temperature to make the fiber retract. The nanometer fiber membrane prepared by the application has both shape memory performance and a regulatable surface micro-topological structure, and the process is simple and the cost is controllable, so the application is suitable for the fields of biomedicine, intelligent materials and the like.

The application provides a method for detecting the purity of supercoiled DNA in plasmid samples with different molecular weights and application thereof, and comprises the following steps: preparing linearized plasmid samples and untreated plasmid samples for HPLC detection; performing HPLC detection by using an anion exchange column; collecting chromatograms of supercoiled plasmid DNA, open circle plasmid DNA, linear plasmid DNA and concatemer plasmid DNA in linearized and untreated plasmid samples with different molecular weights; and the mobile phase of the HPLC detection comprises: mobile phase A is a water solution containing tris-hydroxymethyl aminomethane, and mobile phase B is a water solution containing tris-hydroxymethyl aminomethane and sodium chloride. The method can ensure complete separation of supercoiled plasmid DNA, open circle plasmid DNA, linear plasmid DNA and concatemer plasmid DNA in plasmid samples with different molecular weights, has high resolution and high sensitivity, and has important application value in the field of nucleic acid drug analysis technology.

This invention provides a water-soluble toltrazuril solid powder, its preparation method, and its application. The water-soluble toltrazuril solid powder is a solid adsorption complex formed by toltrazuril and an adsorption ligand under alkaline conditions. The adsorption ligand is any one of tris(hydroxymethyl)aminomethane, tetrabutylammonium bisulfate, dodecyltrimethylammonium chloride, and N-ethylpiperazine. The molar ratio of toltrazuril to the adsorption ligand in the solid powder is 1:(1.1-1.3). It can dissolve rapidly without stirring under still drinking water conditions, and no drug precipitation occurs after long-term storage after dilution, thus meeting the needs of the aquaculture and pet breeding industries for convenient, stable, and efficient anticoccidial administration programs.

The application discloses a facial filling and lip sculpting method based on a pre-expanding autologous fat pad principle, belongs to the technical field of medical cosmetology and biological tissue engineering, and comprises the following steps: preparing a biological scaffold with a vascularization induction function, and the preparation raw material of the biological scaffold comprises the following components in parts by weight: 80-100 parts of polycaprolactone, 20-30 parts of gelatin, 5-10 parts of dopamine hydrochloride, 2-4 parts of deferoxamine, 3-6 parts of a zwitterionic polymer, 1-3 parts of an activator, 1000-1500 parts of an organic solvent and 500-800 parts of a tris-hydroxymethyl aminomethane-hydrochloric acid buffer solution. The thin film and high porosity are combined, so that the newly generated blood vessels can smoothly penetrate the scaffold and go deep into the interior, the blood supply dead angle in the central region is eliminated, and the probability of fat liquefaction and necrosis is reduced.