826 results about "Buffering agent" patented technology

The invention is about a method of marking ink which is only used to defend fake. The composition of it is: lipidol or lipid, surface active agent, integration agent, water, buffering agent. Their mass percents are: 1,2-hexylene glycol: 5%-15%, butanol: 1-5%, DH-1: 5-10%, EDTA: 0.1-0.5%, MS-1: 0.1-1%, water: the rest. The process is: a. dissolving the colorant in water, b. put the correct percent of 1,2-hexylene glycol and butanol into the solvent, then dropping the MS-1 and EDTA solution when mixing the solvent for 30-50 min, c. put the rest precent of water into the printing ink box. The picture and word would be shown red fluorescence in the UV but blank in the usual light.

The present disclosure provides agronomically stable liquid agricultural compositions, methods of formulation thereof, and methods of application thereof. The agricultural compositions comprise nitrogen-fixing microorganisms and one or more of a buffering agent, a microbial stabilizer, and a physical stabilizer. The disclosed liquid agricultural compositions have a longer shelf life and greater ease of application than other existing dry and liquid formulations. The disclosed liquid agricultural compositions are stable for a period of thirty days or longer with low toxin accumulation and high microbial stability. The compositions are suitable for use on agricultural plant tissues or the environs thereof for providing a source of fixed atmospheric nitrogen to the agricultural plant. The compositions are used to increase crop yield and decrease yield variance.

S-Beta-hydroxybutyric acid compositions for oral delivery are effective in rapidly raising blood ketone levels without causing acute acidosis or gastrointestinal (GI) distress when consumed in sufficiently dilute form and / or as a gel or suspension. By limiting added beta-hydroxybutyrate salts containing alkali or alkaline earth metal ions, beta-hydroxybutyric acid solutions, gels, or suspensions can deliver exogenous ketone bodies without significantly altering electrolyte balance. Although aqueous beta-hydroxybutyric acid solutions are moderately acidic with a pH of about 3.5 to 4, when diluted with sufficient water, the water acts as a pseudo buffering agent that offsets otherwise harsh acidic effects when consumed orally. Gels and suspensions can also ameliorate acidic effects by partially encapsulating the beta-hydroxybutyric acid. Beta-hydroxybutyric acid can be pure S-beta-hydroxybutyric acid or a non-racemic mixture enriched with S-beta-hydroxybutyric acid relative to R-beta-hydroxybutyric acid.

The invention relates to the technical field of glass cleaning agents, in particular to an environment-friendly cover plate glass cleaning agent and a preparation method thereof. The environment-friendly cover plate glass cleaning agent comprises the following raw materials in percentage by weight: 12-20% of inorganic base, 8-12% of a surfactant, 5-8% of a chelating agent, 3-5% of a humectant, 1-3% of an adsorbent, 1-3% of a dispersing agent, 0.3-1% of a buffering agent and the balance of deionized water, the surfactant is dodecyl glucoside and dodecyl ethyoxyl sulphobetaine, and the weight range ratio of the dodecyl glucoside to the dodecyl ethyoxyl sulphobetaine is (3-1): 1; the chelating agent is one or more of sodium gluconate, sodium polyaspartate and sodium polyepoxysuccinate. According to the present invention, the degradable surfactant and the degradable chelating agent are adopted, and the dispersant is added to modify the nanometer titanium dioxide, such that the low pollution property is achieved while the high decontamination efficiency and the anti-fingerprint ability are considered.

The invention relates to the technical field of OLED (Organic Light Emitting Diode) manufacturing process etching processes, in particular to a silver etching solution for an OLED manufacturing process as well as a preparation method and application of the silver etching solution. The silver etching liquid comprises nitric acid, phosphoric acid, a buffer agent, a metal ion chelating agent and an ionic liquid inhibitor, the ionic liquid inhibitor comprises 1-butyl-3-methylimidazole phosphate, the metal ion chelating agent is selected from at least one of pyromellitic acid, diethylenetriamine pentaacetic acid and ethylenediamine tetramethylene phosphoric acid, and the buffer agent is selected from at least one of sodium chloride, sodium chloride and sodium chloride. The buffering agent comprises acetic acid, and all the components are prepared according to a specific mass ratio. The etching solution can balance the etching rate of silver and indium tin oxide, avoid silver residues and black spot defects, prolong the service life of the solution, reduce the use of a volatile buffer agent, adapt to the OLED fine manufacturing process, improve the product yield and reduce the production cost, and is suitable for etching of a metal substrate in the OLED manufacturing process.

The invention discloses a preparation method and application of a rare earth element doped ruthenium oxide catalyst, and the preparation method comprises the following steps: (1) dissolving a rare earth metal salt, a ruthenium metal salt, dopamine hydrochloride and a Tris-HCl buffer agent in water to obtain a mixed solution, and carrying out in-situ polymerization reaction, solid-liquid separation and drying to obtain a powder precursor; and (2) carrying out high-temperature calcination on the powder precursor obtained in the step (1) to obtain the rare earth doped ruthenium oxide catalyst. Rare earth metal salt and ruthenium salt precursors are dispersed on an in-situ constructed porous carbon substrate, and the rare earth element doped ruthenium oxide nanosheet is generated by oxidation under a high-temperature condition through a self-sacrifice template method. The method has the characteristics of high efficiency and no pollution. The rare earth element doped ruthenium oxide disclosed by the invention is used as a catalyst for the anodic reaction of the acidic electrolyzed water, and shows excellent catalytic activity and wide application prospect.

Disclosed herein, in part, are liquid pharmaceutical formulations comprising furosemide or a pharmaceutically acceptable salt thereof, one or more pharmaceutically acceptable excipients, and a pharmaceutically acceptable buffer. Methods of treating congestion, edema, fluid overload, or hypertension in a patient in need thereof are also provided.

The present disclosure provides agronomically stable liquid agricultural compositions, methods of formulation thereof, and methods of application thereof. The agricultural compositions comprise nitrogen-fixing microorganisms and one or more of a buffering agent, a microbial stabilizer, and a physical stabilizer. The disclosed liquid agricultural compositions have a longer shelf life and greater ease of application than other existing dry and liquid formulations. The disclosed liquid agricultural compositions are stable for a period of thirty days or longer with low toxin accumulation and high microbial stability. The compositions are suitable for use on agricultural plant tissues or the environs thereof for providing a source of fixed atmospheric nitrogen to the agricultural plant. The compositions are used to increase crop yield and decrease yield variance.

The invention discloses a preparation method of a quinoa-fruit compound beverage, and belongs to the technical field of beverage processing. Comprising the following steps: S1, raw material pretreatment (in the quinoa pretreatment, high-viscosity enzymolysis modified quinoa pulp is prepared through double-enzyme synergistic hydrolysis of acid protease and natural kiwi fruit protease in kiwi fruit juice in combination with gradient heating and grinding; the preparation method comprises the following steps: pretreating raspberries, namely preparing suspended raspberry seed pulp by freeze-drying, superfine grinding and coating with enzymolysis modified quinoa pulp, and meanwhile, adding tea polyphenol, glycerol and a compound buffer agent to prepare color-protecting anti-crosslinking raspberry juice), S2, blending and homogenizing, and S3, sterilizing and filling. Through three stages of raw material pretreatment, blending and homogenization, and sterilization and filling, the nutritional conflict problems mentioned in the background technology, such as quinoa protein acid denaturation and aggregation, quinoa PPO-mediated raspberry anthocyanin oxidation browning, raspberry seed retention and suspension stability, and taste adaptation, are solved.

The invention belongs to the technical field of contact lens care, and provides temperature-sensitive contact lens eye-moistening gel and a preparation method thereof. The temperature-sensitive contact lens eye-moistening gel is prepared from the following raw materials in parts by mass: a gel matrix, a surfactant, an osmotic pressure regulator, an active component, a chelating agent, a buffering agent and the balance of injection water, the composition of the gel matrix is defined. Chitosan, sodium hyaluronate and polyvinyl alcohol are compounded to serve as a gel matrix, a polyelectrolyte compound is formed, gelation time is shortened, gel strength and swelling resistance are improved, biocompatibility is improved, and drug-loaded delivery of active ingredients is achieved; the gel matrix and the surfactant are reasonably selected, the viscosity of the solution is increased, the gelation time is shortened, the excellent effect of relieving eye fatigue and dryness is achieved, the wearing comfort of the contact lens is remarkably improved, and the oxygen permeation effect of the contact lens is not obviously reduced after gel forming.

The invention relates to an all-vanadium redox flow battery positive electrode electrolyte additive, a preparation method, a positive electrode electrolyte and application, and relates to the technical field of all-vanadium redox flow battery electrolytes.The all-vanadium redox flow battery positive electrode electrolyte additive comprises a main chelating agent, an auxiliary chelating agent, a pH buffering agent and a dispersing agent, the main chelating agent is selected from one or more than two of citric acid, tartaric acid, 1-hydroxyethylidene-1, 1-diphosphonic acid and trisodium methylglycine diacetate, and the auxiliary chelating agent is selected from one or more than two of disodium ethylene diamine tetraacetate, trisodium nitrilotriacetate and tetrasodium glutamate diacetate; the mass ratio of the pH buffering agent to the main chelating agent to the auxiliary chelating agent to the dispersing agent is (3.6-4.1): (0.6-1.5): (2.5-3.2): (1.7-2.5). According to the positive electrode electrolyte additive for the all-vanadium redox flow battery, the electrolyte has a remarkable high-temperature anti-precipitation effect, the energy density and the electrochemical performance are not sacrificed, and the preparation process is simple and controllable.

The invention discloses an ultrahigh-temperature and high-salinity water-based guanidine gum fracturing fluid and a preparation method thereof. The guanidine gum fracturing fluid is prepared from a base fluid, a buffering agent, a cage-shaped molecule composite cross-linking agent and a gel breaker according to the mass ratio of 100: (0.1 to 0.6): (0.2 to 0.8): (0.01 to 0.08), the base solution is prepared from the following components in percentage by weight: 0.55 to 0.6 percent of a cyclodextrin modified thickening agent, 0.1 to 0.6 percent of a composite antioxidant, 0.4 to 0.8 percent of a multi-effect auxiliary agent, 0.1 to 0.2 percent of a sterilizing agent and the balance of hypersalinity water. According to the ultrahigh-temperature hypersalinity water-based guanidine gum fracturing fluid, through chemical modification of the guanidine gum thickening agent and synergistic interaction of various additives, the ultrahigh-temperature hypersalinity water-based guanidine gum fracturing fluid can resist the temperature of 200 DEG C, can be directly prepared by using hypersalinity water, realizes good fracture forming, sand carrying, temperature resistance and shearing resistance, and is low in filtration loss and damage; and the requirements of fracturing construction of ultra-deep ultra-high-temperature low-permeability reservoirs of offshore and onshore oil fields are met.

The invention discloses a high-density ceramic coating and a preparation method thereof, and relates to the technical field of polymer coatings, the high-density ceramic coating comprises, by mass, 33-35 parts of silica sol, 43-45 parts of a solvent, 0.35-0.42 part of a weak acid buffer agent and 18.5-19.9 parts of an auxiliary agent; wherein the solvent is prepared from the following components in parts by mass: 25.5 to 26.5 parts of MTMS, 0.5 part of deionized water and 16 to 19 parts of ethanol; the silica sol comprises 25.5-26.5 parts by mass of 45nm SiO2 sol and the balance of 15-20nm SiO2 sol, and the SiO2 sol is modified silica sol which is loaded by a metal organic framework or is subjected to in-situ growth of graphene quantum dots. The wear-resistant and high-temperature-resistant valve has the effects of wear resistance, high temperature resistance and long service life.

Disclosed herein, in part, are liquid pharmaceutical formulations comprising furosemide or a pharmaceutically acceptable salt thereof, one or more pharmaceutically acceptable excipients, and a pharmaceutically acceptable buffer. Methods of treating congestion, edema, fluid overload, or hypertension in a patient in need thereof are also provided.

The invention relates to the technical field of preparation of carbon dioxide adsorbents, and discloses a carbon dioxide solid adsorbent and a preparation method and application thereof, the carbon dioxide solid adsorbent comprises 10-15 parts of aminated montmorillonite, 5-8 parts of modified chitosan, 20-25 parts of desulfurized gypsum, 3-5 parts of a composite water-retaining agent, 1-2 parts of a functional buffer agent and 0.5-1 part of an ammonia adsorption accelerant. According to the invention, the aminated montmorillonite is adopted to replace traditional streptomycin, so that the raw material cost is reduced, and the risk of antibiotic residue is thoroughly eliminated; chitosan is modified through graphene quantum dots, the excellent oxidation resistance of the graphene quantum dots is utilized, an antioxidant does not need to be additionally added, the environment burden is reduced while the preparation process is simplified, and the degradation rate of the adsorbent in the natural environment is increased. All the components in the adsorbent have a synergistic effect, the aminated montmorillonite provides abundant adsorption active sites, the modified chitosan enhances the mechanical strength and stability of the adsorbent, the composite water-retaining agent and the buffer agent guarantee the stability of an adsorption environment, and the ammonia adsorption accelerant accelerates CO2 adsorption kinetics.

Disclosed herein, in part, are liquid pharmaceutical formulations comprising furosemide or a pharmaceutically acceptable salt thereof, one or more pharmaceutically acceptable excipients, and a pharmaceutically acceptable buffer. Methods of treating congestion, edema, fluid overload, or hypertension in a patient in need thereof are also provided.

The invention belongs to the technical field of solar cells, and particularly discloses a texturing additive, a texturing solution and a texturing method of a back contact cell. The texturing additive for the back contact battery comprises the following components in percentage by mass: 1.0%-5.0% of sodium carboxymethyl cellulose, 0.03%-0.2% of sodium lignin sulfonate, 0.003%-0.03% of paeoniflorin, 0.005%-0.05% of salvianolic acid B, 0.001%-0.01% of polyhexamethylene biguanide hydrochloride, 0.3%-1.0% of a buffering agent, 0.01%-0.1% of a surfactant and the balance of water. The components interact with each other, and the texturing additive is added into the texturing liquid to improve the flatness of the texturing surface and effectively solve the problem that the texturing surface is not fully distributed, so that the minority carrier lifetime and the open voltage of the back contact battery are improved, and the photoelectric conversion efficiency of the battery is improved.

The invention discloses an aluminum anodic oxidation electrolyte for improving the adhesion density of an electrode foil oxidation film, and relates to the technical field of anodic oxidation, the electrolyte comprises 3%-10% of ammonium dihydrogen phosphate, 0.5%-3% of sulfuric acid, 0.01%-0.2% of nano titanium dioxide or nano aluminum oxide, 0.05%-0.5% of an organic buffer agent, and the balance deionized water; the organic buffering agent is used for stabilizing the pH value in a range of 4.5-6.0; nano titanium dioxide or nano aluminum oxide is used as an oxidation film nucleation center to promote directional crystallization of gamma '-Al2O3; the sulfuric acid component improves the conductivity of the electrolyte; ammonium dihydrogen phosphate generates an aluminum phosphate barrier layer on the surface layer of the oxidation film to enhance the waterproof performance of the film layer; according to the electrolyte, the adhesion density and crystallinity of an oxidation film can be remarkably improved, the uniformity and waterproof performance of a film layer are improved, the specific volume stability and the formation efficiency are improved, and the electrolyte is suitable for continuous production of the high-performance aluminum electrolytic capacitor.

Disclosed herein, in part, are liquid pharmaceutical formulations comprising furosemide or a pharmaceutically acceptable salt thereof, one or more pharmaceutically acceptable excipients, and a pharmaceutically acceptable buffer. Methods of treating congestion, edema, fluid overload, or hypertension in a patient in need thereof are also provided.

Oral pharmaceutical solution comprising a pharmaceutically acceptable salt of lisdexamfetamine, and a pharmaceutically acceptable aqueous carrier comprising a buffer and a cosolvent selected from the group consisting of a glycol, a polyol, and a mixture thereof, wherein the pH of the solution is from 5.5 to 9.0. The oral pharmaceutical solution presents excellent physicochemical stability, even under alkaline conditions.

The invention relates to an invar alloy mask plate plasma nanometer polishing and thinning system and method, the system comprises a water tank (2), the water tank (2) is filled with a polishing solution (3) and an invar alloy mask plate (4), and the depth of the invar alloy mask plate (4) in the water tank (2) is controlled through a lifting system controller (5) and a lifting device (6); the polishing solution (3) comprises main salt, auxiliary salt and water; the main salt comprises (conductive electrolyte for generating plasma) 1-2% of potassium citrate and 1-2% of potassium nitrate; the auxiliary salt comprises a buffering agent, a thickening agent, a protective agent and a brightening agent. Through the synergistic effect of a special polishing solution formula and an optimization process, efficient and uniform thinning and nanoscale polishing of the ultrathin invar alloy mask plate are achieved, the surface flatness and environmental protection property are improved while the natural color gloss of metal is guaranteed and edge burning and salt residue are avoided, and the high-precision use requirement of the mask plate is met.

The present invention provides a low pH pharmaceutical composition comprising (a) an antibody constructs comprising a first domain binding to a target cell surface antigen, a second domain binding to a second antigen and preferably a third domain, which is a specific Fc modality, (b) at least one buffer agent, (c) at least one saccharide, and (d) at least one surfactant; and wherein the pH of the pharmaceutical composition is in the range of 3.5 to 6.

The invention discloses a green preparation method for realizing a high-performance chitosan film through pH regulation and control of a citric acid buffering agent, and belongs to the field of food packaging and high polymer materials. According to the method, a water phase separation method is adopted, a citric acid buffering agent serves as a water phase environment, and a chitosan solution is induced to be subjected to phase separation and gelation by regulating and controlling the pH value (preferably 5.0-5.5) of the citric acid buffering agent. The preparation method comprises the following specific steps: dissolving chitosan powder in an alkali urea solvent (KOH: urea: water = 7: 12: 81), inducing gelation through a citric acid buffer agent, carrying out solvent replacement through an ethanol solution, and drying and curing. According to the method, a chemical cross-linking agent does not need to be used, and the core is that a buffer system is used for regulating and controlling the phase separation process to promote aggregation among chitosan molecular chains, so that a compact physical structure network is constructed. The prepared chitosan film has excellent mechanical strength, water resistance, gas barrier property, biocompatibility and degradability, and is suitable for the fields of food, medicine packaging and the like.

The invention relates to the technical field of hole sealing reagents, in particular to a medium-temperature nickel-free hole sealing agent and a preparation method and application thereof. The invention provides a nickel-free hole sealing treatment fluid, which comprises the following components by mass concentration: 0.1-30 g / L of a main hole sealing agent; 0.01 to 30 g / L of polyol fatty acid ester; 0.1 g / L to 10 g / L of an accelerant; a pH buffer agent is 0.05 to 5 g / L; wherein the main hole sealing agent comprises alkali metal salt and / or alkaline earth metal salt and lays a hole sealing core foundation; the polyol fatty acid ester is used as a coalescing agent and can form an organic film on the outer surface of a film layer to further obstruct a medium and improve the smoothness; the accelerant can further improve the corrosion resistance and the color fixing property; and the pH buffering agent ensures that the functions of all the components are fully exerted. All the components of the treating fluid cooperate with one another, so that the hole sealing quality, the salt mist tolerance and the color fixing performance of the treating fluid can be comparable with those of a commercially available nickel-containing hole sealing agent, and the treating fluid shows excellent comprehensive performance.

The invention discloses a lithium-rich manganese-based positive electrode material precursor as well as a preparation method and application thereof, and relates to the technical field of lithium ion battery positive electrode materials. Comprising a nucleation stage, a growth stage and an aging stage, in the nucleation stage, a precipitant solution, a metal salt solution, a complexing agent solution and a buffering agent solution are added into a reaction container in a parallel flow mode, and pH is controlled; in the growth stage, the pH is controlled, and feeding is stopped after D50 and the span meet the requirements. The parallel flow addition of the buffer agent solution is beneficial to adjusting the precipitation rate of a reaction system, and a lithium-rich manganese-based positive electrode material precursor with low particle size, high tap density, high specific surface area, high sphericity and dense morphology is obtained; the preparation method has obvious stability, reproducibility and superiority, and provides great convenience for batch production.

Disclosed herein, in part, are liquid pharmaceutical formulations comprising furosemide or a pharmaceutically acceptable salt thereof, one or more pharmaceutically acceptable excipients, and a pharmaceutically acceptable buffer. Methods of treating congestion, edema, fluid overload, or hypertension in a patient in need thereof are also provided.

The application provides a liquid pharmaceutical composition containing an anti-CLDN18.2 antibody, comprising: a therapeutically effective amount of an anti-CLDN18.2 antibody, a surfactant, an oligosaccharide, water and a buffer, and the pH of the preparation is 5.2-6.2. The liquid pharmaceutical composition of the application has simple components, good stability, is suitable for storage and transportation, can reduce the cost of packaging materials, transportation and storage and the like, and meanwhile, the biological activity of the antibody is maintained.

This disclosure provides anti-VEGF antibodies formulated as high-concentration aqueous pharmaceutical compositions suitable for injection, preferably intravitreal injection. Aqueous pharmaceutical compositions are useful for delivering a high concentration of the antibody active ingredient to a patient without high levels of antibody aggregation and without a high level of sub-visible particulate matter. An aqueous composition of the disclosure comprises an antibody having a concentration of at least 50 mg / mL. An aqueous pharmaceutical composition of the disclosure includes a sugar, a buffering agent, and a surfactant.

This invention relates to the field of organic synthesis technology and discloses a method for preparing 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester, comprising the steps of: S1, providing raw material: 3-cyclohexenecarboxylic acid-3′-cyclohexene methyl ester; S2, epoxidation reaction: mixing the raw material with hydrogen peroxide, a composite catalyst, and a buffer to obtain a reaction solution containing the target product; S3, separation and purification: allowing the reaction solution to stand and separate into layers, separating the organic phase, washing with water, drying, and vacuum distilling to obtain 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester. This method for preparing 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester uses hydrogen peroxide as the oxygen source, resulting in no heavy metal pollution, low wastewater volume, and conforming to the trend of green chemistry. The composite catalyst requires a small amount, has high activity and good selectivity, can be recycled ≥5 times, reducing costs, requiring less equipment, and is highly safe. The product is colorless and transparent, with a high epoxy value, purity ≥98.5%, low acid value, and good stability.

The invention relates to the related technical field of dispergators, in particular to a compound dispergator for ceramic cultural relics and a preparation method of the compound dispergator for the ceramic cultural relics, and the compound dispergator for the ceramic cultural relics is composed of a main solvent I, a main solvent II, a penetration enhancer, a pH buffering agent, a thickening agent and a surfactant, wherein the main solvent I is 40-70 parts, the main solvent II is 5-10 parts, the penetration enhancer is 5-15 parts, the pH buffering agent is 0.5-2 parts, the thickening agent is 0.5-2 parts, and the surfactant is 1-4 parts. The special dispergator for the ceramic cultural relics and the preparation method of the special dispergator have the following remarkable advantages of high efficiency and broad spectrum: through compounding of the two main solvents and the penetration enhancer (NMP), a synergistic effect is formed, various stubborn adhesives from cyanoacrylate to cross-linked epoxy resin and the like can be effectively treated, the removal efficiency is high, and the action time is short. The preparation method has the advantages of simple process, excellent safety, controllable operability and environmental friendliness, the whole preparation process is carried out at normal temperature and normal pressure, no special equipment is needed, the process is simple, the reproducibility is good, and standardized production is easy to realize.