40 results about "Ethylene Glycol Tetraacetic Acid" patented technology

The invention discloses a method for measuring the content of magnesium oxide in iron ores, relates to a detection method, and particularly relates to a method for measuring the content of magnesium oxide in depositing iron rocks and ores. The method includes adopting sodium hydroxide as a fusing agent to melt an iron ore sample in a high-temperature furnace and leading magnesium ions to enter solution after acidification by aid of nitric acid; and adding benzilic acid, ethylene glycol tetraacetic acid (EGTA) solution and triethanolamine to mask metal ions of titanium, iron, aluminum, alkaline earth and the like, generating magnesium hydroxide deposit in alkaline solution with the pH (potential of hydrogen) larger than 12, depositing to generate hydrochloric acid solute after filtering, using acid chrome blue K and naphthol green B as indicators in solution with the pH of 10, adopting ethylene diamine tetraacetic acid (EDTA) standard solution for titration, and obtaining the content of the magnesium oxide. The method has the advantages of simplicity, convenience, speediness, low cost, fine reproducibility and the like.

The invention relates to material absorbing heavy metal in water solution and a method. The material is made through the fact that functional perssad is modified on the surface of various kinds of immobilized material, and the functional perssad is in covalent bonding with ethylene glycol tetraacetic acid (EGTA). The material can be used for remove of lead, mercury, cadmium, arsenic and other poisonous metal in the water solution, cannot change an adsorbing effect along with change of the immobilized material, and cannot change other components in the water solution. The material and the method have the advantages of being low in cost, wide in application range, strong in removing performance, good in selectivity, capable of being reproducible, and the like.

The invention relates to a phytoremediation technology of cadmium-polycyclic aromatic hydrocarbon composite contaminated soils, and in particular relates to a mixed reinforcer for reinforcing repair of nightshade on composite contaminated soils and an application thereof. The reinforcer is composed of the following components of EGTA (ethylene glycol tetraacetic acid), citric acid and salicylic acid with the molar ratio of (0.1-1.0): (0.5-5.0): (0.1-1.0). The reinforcer is added into heavy metal-polycyclic aromatic hydrocarbon composite contaminated soils planted with hyperaccumulators and/ or accumulators. The citric acid and the salicylic acid are mixed to be dissolved into water to serve as the reinforcer; then, the reinforcer is applied in the heavy metal-polycyclic aromatic hydrocarbon composite contaminated soils planted with hyperaccumulators and/or accumulators, especially contaminated soils planted with nightshade; when the nightshade is mature, plants and soil samples are collected and are compared with those in which the reinforcer is not applied; the result shows that the processing effect is better if the reinforcer is applied, and the upper Cd extraction ratio of the nightshade is improved by 42.6%; and meanwhile, the removal rate of the polycyclic aromatic hydrocarbon of the soils can reach 25.3%, and the repair efficiency is obviously improved.

A process for making cerium-containing nanoparticles with biocompatible stabilizers is described, wherein an aqueous reaction mixture comprising cerous ion, citric acid, a stabilizer (chelator) selected from the group consisting of nitrilotriacetic acid, ethylene glycol tetraacetic acid and diethylenetriaminepentaacetic acid, and an oxidant, is provided, followed by a heating step to effectively form the nanoparticles. These biocompatible nanoparticles can be used to treat oxidative stress related diseases and events, such as ischemic stroke.

The invention relates to a plant repair technology for heavy metal-polycyclic aromatic hydrocarbon composite polluted soil, in particular to application of an additive for repairing polluted soil. The additive consists of the following components by mole: 0.1 to 1.0 mole of ethylene glycol tetraacetic acid (EGTA), 0.5 to 5.0 moles of citric acid and 0.1 to 1.0 mole of Tween 80. The additive is added into the heavy metal-polycyclic aromatic hydrocarbon composite polluted soil planted with hyper-accumulators and/or accumulators. The EGTA, the citric acid and the Tween 80 are mixed and dissolved in water to form a reinforcing agent, then the reinforcing agent is applied to the heavy metal-polycyclic aromatic hydrocarbon composite polluted soil planted with the hyper-accumulators and/or the accumulators, particularly the polluted soil planted with night shades, and plants and soil samples are harvested when the night shades are mature; compared with the contrast without adding the reinforcing agent, the treatment effect is better when the reinforcing agent is applied, the extraction rate of the ground part Cd of the night shades is increased by 17.8 percent, meanwhile, the removal rate of the total amount of the polycyclic aromatic hydrocarbon of the soil can reach 25.8 percent, and the repair efficiency is remarkably improved.

The invention relates to a determination reagent of a total bile acid. The reagent comprises two components, wherein the reagent 1 comprises a phosphate buffer, Thio-NAD (Nicotinamide Adenine Dinucleotide), Emulgen B-66 CTAB (Cetyltrimethyl Ammonium Bromide), NaCl, 2-hydroxypyridine-N-oxide; the reagent 2 comprises a glycinate buffer, dextran sulfate, EGTA (Ethylene Glycol Tetraacetic Acid), 3 alpha-HSD (Hydrogen Sterol Dehydrogenase), Emulgen B-66, NADH (Nicotinamide-adenine Dinucleotide Acid), and 2-hydroxypyridine-N-oxide. As the combination of the cation surfactant and the nonionic surfactant Emulgen B-66 is added, the interference of bilirubin can be effectively eliminated; the selected stabilizer is added in the product, so that the reagent can be stored for one year at 2-8 DEG C without influence on the properties; the substrate concentration and the ion strength can be adjusted to enable the recovery rate of the reagent to be more than 98%. The determination reagent disclosed by the invention has the advantages of high accuracy in determined results, strong anti-interference performance, good stability and the like.

The invention discloses a method for measuring the metallic magnesium content of a briquette nodulizing agent by using complexometry. The method comprises the steps of dissolving metallic magnesium in a test sample in dilute acetic acid, removing other Insoluble matters through filtering and washing, and fixing the volume of the filtrate in a volumetric flask; and weighing a certain volume of filtrate, regulating the pH value to 6-7 with ammonia water, separating interference elements with a copper reagent, complexing calcium with EGTA (ethylene glycol tetraacetic acid) when the pH is 10, and performing complexometry on magnesium by using EDTA (ethylene diamine tetraacetic acid), wherein eriochrome black T is an indicator. The method can detect that the metallic magnesium content in a briquette nodulizing agent sample is 5-15%, which nearly covers the metallic magnesium distribution gradients of all nodulizing agents in the production process, and can be applied to quantitative detection of the metallic magnesium in the laboratory briquette nodulizing agent for a long term. The method has the advantages of simplicity, fastness, high accuracy and precision and the like.

The invention discloses a tumor chemotherapy drug susceptibility detection kit which comprises a histocyte dispase, an antibiotic solution, an amphotericin solution, an EGTA-Trypsin (Ethylene Glycol Tetraacetic Acid) solution, a serum-containing culture medium DF10, a serum-free culture medium Kertin-SFM, a specimen preserving fluid, a specimen cleaning fluid, a gel coating culturing bottle, a cell fixing fluid, cell dispase, a cell filtering membrane, a neutral red dyeing solution and a collagen gel preparing reagent. A detection operation flow of the kit comprises the steps: primary cell culture, culture in collagen gel drops, and analysis of chemotherapy drug susceptibility. Compared with the prior art, the tumor chemotherapy drug susceptibility detection kit has the beneficial effects that the tumor chemotherapy drug susceptibility detection kit is capable of maximally protecting activity of tumor cells and shortening the drug susceptibility detection time. The tumor chemotherapy drug susceptibility detection kit contains all reagents required for tumor cell primary culture and chemotherapy drug detection; consumable items are disposable articles, thus bacterium pollution in an experiment process is reduced, and the convenience is brought for the use.

A removable, colored X-alginate coating composition for a surface includes an aqueous solution of sodium alginate including a colorant and an aqueous solution containing divalent cations. In various aspects, the aqueous solution containing divalent cations includes, but is not limited to, calcium chloride, calcium chlorate, calcium carbonate, magnesium chloride, magnesium chlorate, or magnesium carbonate. The applied coating composition is advantageously in the form of a thin film coating. The thin film may have a thickness about equal to or greater than 10 nanometers and may include more than a single layer; for example, two mono-layers, but not limited as such. Any one of the plurality of monolayers may have a thickness about equal to or greater than five nanometers. Advantageously, the X-alginate coating composition according to the embodiments of the invention is substantially removable from the application surface on-demand upon the application of a suitable chelator. According to an advantageous embodiment, the coating composition is essentially non-toxic and bio-degradable. A reversible, colored X-alginate coating system includes a colored X-alginate coating composition and a colored X-alginate coating composition remover. The remover may be a chelator such as, but not limited to, disodium ethylenediamine tetraacetate (EDTA), ethylene glycol tetraacetic acid (EGTA), or sodium citrate. A method for reversibly coloring a surface includes applying an aqueous solution of sodium alginate including a colorant onto the surface and applying an aqueous solution containing divalent ions onto the surface, wherein the solutions are in mutual contact on the surface. Water may subsequently be applied to the coated surface as a final washing step.

An enhanced chelator includes a chelating agent and a volatile material encapsulated in a biologically benign microcapsule. The enhanced chelator possesses significantly improved shelf-life in aqueous biological buffer solutions because the chelating agent is encapsulated in the microcapsule and, therefore, separated from solution components with which the chelating agent would react. The enhanced chelator is activated at a predetermined elevated temperature defined by the boiling point of the volatile material. At this predetermined elevated temperature, the volatile material exerts a vapor pressure sufficient to rupture the microcapsule and thereby release the chelating agent from the microcapsule. In one embodiment, a manganese chelator such as ethylene glycol tetraacetic acid (EGTA) is solubilized in ethanol and encapsulated in a poly(lactic-co-glycolide) (PLGA) microsphere. Upon heating to 80° C., ethanol boils within the PLGA microsphere and undergoes several orders of magnitude volume change, thereby rupturing the PLGA microsphere and releasing EGTA.

The invention provides a novel sewage treatment agent which comprises the following components in percentage by weight: 0.1-10% of ethylene glycol tetraacetic acid, 1-50% of ethylene diamine, 1-15% of pentasodium diethylene triamine pentaacetate, 1-15% of phosphate and the balance of water. The invention can effectively capture multiple metallic ions in the water body, such as Ca<2+>, Mg<2+>, iron ions, zinc ions, strontium ions and the like, and has obvious corrosion inhibition effect.

The invention discloses a sewage treatment agent for printing and dyeing wastewater. The sewage treatment agent is prepared from the following raw materials in parts by weight: 8-11 parts of aluminum sulfate, 10-13 parts of ferric phosphate, 3-6 parts of seaweed mud, 11-15 parts of sea-foam stone powder, 2-5 parts of nano-zinc oxide, 1-3 parts of active calcium silicate, 15-19 parts of trimethylene di(octadecyl dimethyl) ammonium-bentonite, 1-2 parts of ethylene glycol tetraacetic acid, 2-5 parts of a chitosan-graphene composite material, 24-27 parts of polyaluminum ferric chloride and 18-22 parts of polyacrylamide. The invention further discloses a preparation method of the sewage treatment agent for printing and dyeing wastewater. The sewage treatment agent disclosed by the invention is capable of effectively removing pollutants in printing and dyeing wastewater, good in treatment effect, low in treatment cost, free from toxicity and free from secondary pollution.

The invention discloses application of EDTA (ethylene diamine tetraacetic acid) in improving exocytosis volume and expression volume of escherichia coli recombinant protein. The inventor of the invention discovers that EDTA has performance of improving exocytosis volume and expression volume of escherichia coli recombinant protein, and has the best effect in improving the exocytosis volume and expression volume of escherichia coli recombinant protein as compared with EGTA (ethylene glycol tetraacetic acid), citrulline, guanidine hydrochloride and Triton X-100. In the application method disclosed by the invention, after an inducer performs inducing culture to escherichia coli containing recombinant vector, EDTA or EDTA and lysozyme are added to continue culturing. The application method ofthe EDTA in improving the exocytosis volume and expression volume of the escherichia coli recombinant protein, disclosed by the invention, has simple operation and low cost, and the exocytosis volumeand expression volume of protein with larger molecular weight and difficult excretion can be increased.

The invention discloses a high-voltage electrical equipment electrified cleaning agent and a preparation method thereof, and belongs to the technical field of fine chemical products. The high-voltageelectrical equipment electrified cleaning agentis prepared from the following raw materials in parts by weight: 60 to 100 parts of tetrachloroethylene, 1 to 10 parts of polyether modified organic silicon, 30 to 50 parts of absolute ethyl alcohol, 1 to 10 parts of propylene glycol block polyether, 5 to 10 parts of sodium tripolyphosphate, 0.5 to 3 parts of ethylene glycol tetraacetic acid, 0.5 to 3parts of simethicone, 0.5 to 1 part of dimethyl sulfoxide and 0.05 to 0.3 part of dodecyl dimethyl betaine. The high-voltage electrical equipment electrified cleaning agent is good in cleaning effect, high in safety, high in insulation performance, and free of any damage on equipment.

The invention discloses a separation method of mouse intestinal lamina propria primary dendritic cells. The method comprises the following steps of cutting intestinal canals into intestinal sections being 10 to 12cm; eluting intestinal canal surface impurities and intestinal canal surface mucus; using digestive juice B containing EDTA (ethylene diamine tetraacetic acid) and EGTA (ethylene glycol tetraacetic acid) for eluting the enterocyte layer; then, performing digestion by digestive juice containing Liberase TL and DNase I; finally, performing sorting by a flow cytometry to obtain the mouse intestinal lamina propria primary dendritic cells. The primary dendritic cells obtained through the separation by the method have high purity and complete phenotype.

The invention provides a novel corrosion-inhibition scale inhibitor for treating circulating water, which comprises the following components in percentage by weight: 0.1-10% of ethylene glycol tetraacetic acid, 1-50% of ethylene diamine, 1-15% of pentasodium diethylene triamine pentaacetate, 0.1-10% of nitrilotriacetic acid and the balance of water. By using the technical scheme, the problem of high hardness of circulating water can be solved; and the scale inhibitor has the function of peeling old scales, overcomes the equipment damage by manual and mechanical scale removal, and enhances the power generating efficiency.

The invention provides a novel scale inhibitor for treating high-hardness water, which comprises the following components in percentage by weight: 0.1-10% of ethylene glycol tetraacetic acid, 1-50% of ethylene diamine, 1-15% of diethyltriamine pentaacetic acid and the balance of water. By using the technical scheme, the problem of high hardness of circulating water can be solved, thereby overcoming the equipment damage by manual and mechanical scale removal and enhancing the power generating efficiency.

The invention discloses a method for performing treatment on heavy metal contaminated soil by combining plants and a chelating agent. The method comprises the steps of growing the plants having concentrating capability on heavy metals in the heavy metal contaminated soil of which the heavy metal contaminant types are Zn, Pb, Cd and Cu, and putting the chelating agent into the heavy metal contaminated soil, wherein each plant having the concentrating capability on the heavy metals is a poplar, peganum harmala or Nitraria tangutorum; the poplar is Populus bolleana; and the chelating agent is EDTA (Ethylene Diamine Tetraacetic Acid), EGTA (Ethylene Glycol Tetraacetic Acid) or CA (Citric Acid). According to the method disclosed by the invention, the development of the industry of plant growingand soil recycling is promoted, and thus, recycling of renewable resources is facilitated; and economic and ecological environmental-protection regeneration treatment is performed on a region contaminated by the heavy metals, so that global ecological equilibrium is facilitated.

The invention discloses a thiosulfate silvering additive, a preparation method thereof and electroplate liquid containing the same. The thiosulfate silvering additive comprises 12-18 g/L of lauryl sodium sulfate, 3-5 g/L of polyethylene glycol, 10-13 g/L of nitrogen mustard, 5-10 g/L of cumin, 250-350 g/L of 1,10-phenanthroline monohydrate, 50-100 g/L of dimercaprol dimercaptopropanol, 50-100 g/Lof mercaptoethylamine, 100-150 g/L of ethylene glycol tetraacetic acid (EGTA) and the balance water. The additive provided by the invention enables the dispersity, the stability and the electroplatingperformance of the electroplate liquid to be quite remarkably improved, the pH value does not need to be adjusted repeatedly in the electroplating process, meanwhile, the performance including the smoothness, the adhesive force, the glossiness, the anti-tarish performance and the like of a silvering coating are remarkably improved, the thickness of the coating is further reduced, and phenomena such as fracturing do not exist; and the electroplate liquid provided by the invention does not contain cyanide, the mirror surface of the coating is bright, small in brittleness, good in adhesive force, flat in surface, bright, good in anti-tarish performance and high in heat resistance, application to the multiple fields of decorative electroplating, functional electroplating and the like can be achieved, preplating is not needed, and the bonding force can also be guaranteed.

The invention belongs to the technical field of molecular biology, and in particular relates to a method for extracting polysome from rice on the basis of immune-precipitation. The method comprises the steps: by mainly adopting an immunization method, enriching a Flag tag-labeled ribosome-mRAN (messenger ribonucleic acid) compound by using affinity chromatography, chelating other metal ions in tissue homogenate by using EGTA (ethylene glycol tetraacetic acid), and inhibiting the dissociation of ribosome and mRNA by adding chloramphenicol and cycloheximide, wherein the formulas of an extraction solution and an elution solution as well as the material homogenate and concentration modes are improved; the ribosome-mRAN compound is eluted by using EDTA with the final concentration of 0.1M. The method disclosed by the invention is expected to separate 2-4 important new functional genes involving in low-temperature stress, ensures the normal growth and proliferation of plants under the low-temperature stress, and finally plays an important role in yield development.

The invention discloses hand cream for promoting wound healing. The hand cream is prepared from the following components in part by weight: 50 to 60 parts of cationic water, 15 to 25 parts of glycerol, 1 to 3 parts of triethanolamine, 2 to 3 parts of ethylene glycol tetraacetic acid disodium, 1 to 2 parts of glycerol monostearate, 3 to 5 parts of cetanol, 1 to 3 parts of Vaseline, 8 to 12 parts of hydrogenated jojoba oil, 14 to 16 parts of potassium hydroxide, 4 to 6 parts of vitamin D, and 10 to 20 parts of common vladimiria root. The hand cream for promoting wound healing inherits the skin moisturizing effect of the conventional commercial hand cream, and can effectively promote wound healing on hands and feet due to addition of the common vladimiria root.

The invention relates to a water-soluble ternary chelating polymer molecular brush dye trapping agent as well as a preparation method and an application thereof. The water-soluble ternary chelating polymer molecular brush dye trapping agent is characterized by being prepared from polymeric main chain PHEAA (polyhydroxyethyl acrylamide), cationic polymeric side chain PDMC-COOH (poly(methacryloyloxyethyl trimethyl ammonium chloride) containing carboxyl groups at the tail end), anionic polymeric side chain precursor PtBMA-COOH (poly(tert-butylmethacrylate) containing carboxyl at the tail end), functional polymer side chain precursor polymer PNVF-COOH (poly-N-vinylformamide containing carboxyl groups at the tail end), a DMF (dimethylformamide) solvent, a catalyst, namely, NHS (N-hydoxysuccinimide), EDC.CH3I (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide methiodide), potassium hydroxide and EGTAD (ethylene glycol tetraacetic acid dianhydride), and the water-soluble ternary chelating polymer molecular brush dye trapping agent is used for treating dye wastewater and artistic coating wastewater drained in the dye synthesis or dyeing and finishing process. The water-soluble ternary chelating polymer molecular brush dye trapping agent the advantages of being high in trapping capability and settling speed, capable of treating complexing heavy metal ions, trapping dye molecules and complexing heavy metal ions in a few seconds and growing into large settling particles rapidly to achieve the purpose of rapid dye separation, simple to operate, low in treatment cost, high in adaptabilityand the like.