179 results about "Nitrate ion" patented technology

The invention relates to a photoelectrochemical system for synthesizing urea through co-reduction of carbon dioxide (CO2) and nitrate ions (NO3 <->). The system comprises a solar power supply system, a photoelectrocatalysis (PEC) reaction system, a raw material pretreatment system and a product recovery system. The PEC reaction system is communicated with the raw material pretreatment system and the product recovery system in series; and an integrated coupling reaction system is formed. According to the system, solar energy is used as a main energy source, and a co-reduction reaction of CO2 and NO3 <-> is realized through a novel PEC flow cell device, so that urea is directly synthesized. The reaction liquid is conveyed to a product recovery system through a pipeline, and a high-purity urea product is obtained through evaporative crystallization; unreacted CO2 and NO3 <-> can be circulated to the raw material pretreatment system through the reflux device and are further utilized. The method provided by the invention realizes efficient and green synthesis of urea, optimizes the whole process, reduces energy consumption and system complexity, has good economical efficiency and environmental friendliness, and is suitable for the fields of agricultural fertilizers, waste gas and wastewater resourceful treatment and the like.

The invention discloses a compatible molybdenum-aluminum mixed acid etching solution which comprises the following components in percentage by mass: 4%-7% of nitric acid, 55%-65% of phosphoric acid, 17%-28% of acetic acid, 0.5%-3% of an oxidizing additive, 0.05%-5% of a metal corrosion inhibitor and 10%-20% of deionized water, and the oxidizing additive is ceric nitrate and at least one selected from sodium nitrate, potassium nitrate and ammonium nitrate; the etching liquid does not contain other organic components except for organic carboxylic acid and organic carboxylate. According to the compatible molybdenum-aluminum mixed acid etching solution, on the basis that ceric nitrate is introduced, the content of nitric acid is reduced, the nitrate ion concentration is increased by adding nitrate, the overall oxidation performance of an etching solution system is improved, the etching rate ratio of different metals is adjusted, CD-Bias is reduced, the etching dip angles of a molybdenum single layer and a molybdenum-aluminum laminated layer are controlled to be kept at 20-50 degrees, and the problem of aluminum thorns is solved. The invention further discloses a molybdenum-aluminum etching method based on the compatible molybdenum-aluminum mixed acid etching solution.

Semisolid supplement compositions are disclosed comprising at least one non-ester nitrate compound and at least one isolated amino acid compound. The at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound. The composition contains at least about 0.05625 mg nitrate ion (NO3−).

The invention provides a novel D-A-D type fluorescent probe material as well as a preparation method and application thereof. The fluorescent probe material has good stability, the preparation process is simple, and the synthesis condition is mild. Moreover, the D-A-D type fluorescent probe material has good solubility and stability, and a complex of the D-A-D type fluorescent probe material and zinc ions can identify pyrophosphate ions with high selectivity and high sensitivity. The interference of phosphate ions, hydrogen phosphate ions, dihydrogen phosphate ions, fluorine ions, chloride ions, nitrate ions, acetate ions, sulfate ions and carbonate ions is avoided; after the zinc ion complex of the D-A-D type fluorescent probe material is combined with PPi, the fluorescence intensity is remarkably enhanced, the D-A-D type fluorescent probe material has a higher signal-to-noise ratio, in-situ imaging detection of a target object in living cells or tissues is realized, the defects of a traditional molecule and ion detection method are overcome, and the D-A-D type fluorescent probe material is suitable for being widely applied to the field of biological imaging. # imgabs0 #

The invention relates to a preparation method and application of a two-dimensional ultrathin porous nitrogen-doped carbon composite material. According to the invention, a metal salt nitrate ion mediation method is adopted, and the ultrathin porous carbon nanosheet loaded with metal single atoms and metal nanoparticles is successfully prepared through decomposition of a prepolymerized dopamine-metal salt precursor. By changing the type of metal salt ligand anions, accurate regulation and control between a non-porous structure and a porous structure can be realized. Endogenous multi-scale pore defects are introduced into the surface of the carbon nanosheet, so that the impedance matching of the prepared carbon nanosheet system is effectively improved, and meanwhile, high conductivity is kept. According to the prepared material, the dielectric constant is improved by introducing a porous structure, impedance matching is optimized, and the electromagnetic wave absorption capacity is improved.

Described herein are methods of treating and / or alleviating a cytokine-mediated inflammatory disorder, such as gum disease, in a subject in need thereof, comprising applying an oral care composition to an oral cavity of the subject, the oral care composition comprising a stannous ion source; a nitrate ion source; and a water-soluble alkali metal polyphosphate source; and at least 10% water, by weight of the composition. Methods for treating and / or alleviating gum diseases are also described herein.

A microcapsule containing vitamin C and nitrate, said capsule comprising a wall material and a core material encapsulated in the wall material. The wall material comprises pectin and sodium carboxymethyl cellulose, and the core material comprises vitamin C, nitrate, and chitosan. The raw materials of the microcapsule comprise, in parts by weight: pectin 0.7-1.2 parts by weight, sodium carboxymethyl cellulose 0.7-1.2 parts by weight, chitosan 1 part by weight, and vitamin C and nitrate in a total amount of 0.3-1.2 parts by weight, the molar ratio of vitamin C to nitrate ions being 1:1-1:5. A use of the microcapsule in the preparation of a drug for preventing and / or treating damage to the salivary glands caused by radiation therapy, in particular a use in the preparation of a drug for preventing and / or treating damage to the salivary glands caused by radiation therapy for nasopharyngeal carcinoma.

To provide a promoter for proliferation of nitrate-reducing bacteria in the oral cavity, which enables selective proliferation of nitrate-reducing bacteria in the oral cavity.SOLUTION: A promoter for proliferation of nitrate-reducing bacteria in the oral cavity comprises one or more selected from the group consisting of glycyrrhetinic acid, glycyrrhizic acid, and salts thereof. Preferably, the nitrate-reducing bacteria to be proliferated include one or more species selected from the group consisting of bacteria of the genus Neisseria and bacteria of the genus Haemophilus. The promoter further comprises a nitrate ion-supplying compound. The promoter serves as an agent for preventing or improving dental caries or an agent for periodontal disease.SELECTED DRAWING: None

A solid supplement composition comprising at least one non-ester nitrate compound and at least one isolated amino acid compound, wherein the at least one isolated amino acid compound is citrulline, wherein the at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound, and wherein the solid supplement composition comprises an amount of nitrate ion (NO3—) that is at least 0.33125 mg.

The invention relates to the technical field of analytical chemistry, in particular to an ion chromatography method for separation and detection of acetate, nitrite and nitrate ions in a complex matrix culture medium. The method mainly solves the problems of insufficient separation degree, serious matrix interference, poor detection precision and reproducibility and the like when the conventional ion chromatography technology is used for detecting a complex matrix culture medium.

The invention provides a solid electrolyte, a preparation method and a lithium battery, the solid electrolyte comprises a nitrate ion liquid-based metal organic framework C, polyoxyethylene and LiTFSI, the nitrate ion liquid-based metal organic framework C accounts for 3wt% of the polyoxyethylene, and the molar ratio of the polyoxyethylene to the LiTFSI is 10: 1; wherein the nitrate ion liquid-based metal organic framework C has a nitrogen-containing heterocyclic ring, and nitrate ions and Zn ions are coordinated on the nitrogen-containing heterocyclic ring. In the solid electrolyte provided by the invention, nitrogen-containing heterocyclic cations in the nitrate ionic liquid-based metal organic framework have a binding effect on TFSI-anions in the lithium salt, and meanwhile, dissociation of the lithium salt is promoted, so that lithium fluoride is generated in situ. Moreover, nitrate ions obtain electrons on the surface of the lithium metal negative electrode, and the electrons and lithium ions form lithium nitride in situ on the SEI layer, so that deposition of dead lithium is reduced, and finally, the interface stability of the battery is remarkably improved.

The invention provides an electrolyte additive and application thereof, the electrolyte additive comprises a pyrrolidine nitrate compound, and the pyrrolidine nitrate compound has a structure as shown in a formula I: # imgabs0 # formula I, wherein R1, R2, R3, R4, R5 and R6 are respectively and independently selected from one of hydrogen, halogen, linear alkyl, substituted linear alkyl, branched alkyl, substituted branched alkyl, alkoxy, substituted alkoxy, heterocyclic group, substituted heterocyclic group and the like. According to the electrolyte additive disclosed by the invention, the nitrate anions and the pyrrolidinyl cations are contained, and the nitrate anions can form SEI on a negative electrode to improve the stability of a negative electrode interface and enter a solvation structure of lithium ions in the electrolyte to reduce the desolvation energy of the lithium ions; meanwhile, nitrate ions and pyrrolidinyl cations both have excellent oxidation resistance and can be compatible with a high-voltage positive electrode, so that the fast charging performance of the battery is improved on the premise of not sacrificing the service life of the battery.

A nitrogen-based gas discharge device 100 according to one aspect of the present invention includes: a green compact 111 containing a powder of a layered double hydroxide in which nitrite ions (NO2 -) are included between layers, and a powder of a reducing agent or a precursor thereof; and a gas discharge module 110 disposed so as to cover the green compact 111 and composed at least of a film 112 that is waterproof and has water vapor permeability and gas permeability. The solubility of the reducing agent in water at room temperature is 1 g / 30 mL or more and the pH of a 0.1 (w / v)% aqueous solution of the reducing agent at room temperature is 5.1 or less. The nitrogen-based gas discharge device 100 may also include a water-containing body 120 for supplying water vapor to the nitrogen-based gas discharge module 110.

A system for photocatalytic synthesis of urea includes an aqueous solution and a photocatalytic device immersed in the aqueous solution. The photocatalytic device includes a substrate having a surface, and a conductive structure supported by the substrate at the surface, the conductive structure including a nitride interface in contact with the aqueous solution. The aqueous solution includes nitrate ions and dissolved carbon dioxide for synthesis of urea at the nitride interface of the conductive structure.

The invention belongs to the technical field of plant genetic engineering, and particularly discloses a nitrate ion transport channel gene PbrSLAH3b and application of the nitrate ion transport channel gene PbrSLAH3b in promoting growth of pear pollen tubules. The method comprises the following steps: extracting total RNA (Ribonucleic Acid) of Dangshan pears from pollen of Dangshan pears; carrying out reverse transcription on the RNA to obtain cDNA (complementary deoxyribonucleic acid); and by taking the cDNA as a template, carrying out amplification to obtain the pear pollen tube nitrate transport channel gene PbrSLAH3b, the PbrSLAH3b gene provided by the invention belongs to a slow anion channel SLAC / SLAH family member, the PbrSLAH3b is remarkably up-regulated in expression in the early growth stage of a pollen tube, and the PbrSLAH3b is positioned in a plasma membrane. The invention verifies that PbrSLAH3b can form a functional anion channel with NO3 <-> selectivity under the condition of not depending on proton gradient or phosphorylation state, and the PbrSLAH3b has relatively strong selectivity on NO3 <->. Therefore, the PbrSLAH3b gene can mediate the absorption and transport of the pollen tube to NO3 <-> and maintain the polarity growth directivity of the pollen tube, and has important application value for revealing the ion regulation mechanism of the growth of the fruit tree pollen tube and improving the reproductive development of the fruit tree.

The invention provides an NOx treatment system and method based on plasma activated water, and relates to the technical field of industrial waste gas treatment. The method comprises the following steps: acquiring waste gas containing nitrogen oxide NOx; according to the method, plasma activated water containing an oxidizing agent is used for spraying exhaust gas containing NOx to absorb NOx, the oxidizing agent and NOx are subjected to an oxidation-reduction reaction in the plasma activated water, and reaction products comprise nitrate ions dissolved in water. The plasma activated water containing the oxidizing agent is used for spraying the waste gas containing NOx, and NOx is effectively removed. Meanwhile, the activation reaction module can be integrated in the industrial waste gas treatment module, so that zero increase of the occupied land cost of NOx removal is realized. The plasma activated water device can be integrated into the semiconductor plasma waste gas treatment system, and the denitration targets of zero reagent addition, zero wastewater discharge and zero land occupation cost increase are achieved while semiconductor waste gas is efficiently treated.

The invention discloses an electrolyte additive of a lithium metal battery, an electrolyte thereof and a lithium ion battery. The electrolyte additive provided by the invention comprises a cationic organic large group and an anionic nitrate ion organic nitrate additive. NO32 in the structure can be preferentially reduced on the lithium metal negative electrode side to generate high-quality SEI rich in inorganic compounds. Then, the organic cation large groups inhibit the growth of lithium dendrites while maintaining the lithium nucleation rate through the characteristic adsorption effect, and finally uniform spherical deposition morphology is obtained.

The invention discloses a preparation method and application of an all-solid-state ion selective microelectrode, and belongs to the field of ion selective electrodes. A composite material with the mass ratio of super-hydrophobic carbon nanotubes to CoWSe2 being 3: 1 is used as an ion-electron transduction layer material for constructing the all-solid-state ion selective microelectrode, and a nitrate ion selective polymer film or a hydrogen ion selective polymer film is respectively dispensed on the surface of the transduction layer; and drying to obtain the all-solid-state nitrate ion selective microelectrode or all-solid-state hydrogen ion selective microelectrode. According to the method disclosed by the invention, the all-solid-state ion selective microelectrode can more effectively inhibit the formation of a water layer, so that the microelectrode has better potential stability and longer service life when being applied to the detection of ions in an environmental water body sample.

The application discloses a scandium-based MOF crystal material, a preparation method and application thereof. The MOF crystal is formed by [Sc3(mu2-OH)3(CO2)4O6] n The three-dimensional porous framework structure is formed by the mutual connection of an inorganic metal chain, 2,5-thiophene dicarboxylic acid and a nitrate ion, is directly synthesized by a solvothermal reaction with a metal Sc based on the ligand 2,5-thiophene dicarboxylic acid, and has relatively mild, simple and easy reaction conditions. The MOF crystal has high crystallinity, excellent thermal stability, water stability, solvent stability and wide pH stability. Under normal temperature and pressure, C3H6 is preferentially adsorbed, then C2H6, and finally C2H4, and the MOF crystal has good C3H6 / C2H4 and C2H6 / C2H4 separation performance, thereby obtaining high-purity C2H4 and recovering C3H6, and can be applied to the effective separation of C2H4 and C3H6 in a methanol-to-olefin (MTO) mixture.

The invention discloses a method for separating rhenium from a rhenium-rich solution containing molybdenum and tungsten. The method comprises the following steps: extracting a rhenium-rich raw material solution containing ReO4 <-> and impurity ions by using an extraction agent containing hydrophobic ionic liquid to obtain an organic extraction phase containing ReO4 <-> and a raffinate phase containing the impurity ions; wherein the solvent of the raw material solution is water, and the impurity ions comprise one or two of MoO4 < 2-> and WO4 < 2->; the hydrophobic ionic liquid is composed of positive ions and negative ions, the anions are selected from one or more of halide ions, borate anions, carboxylate anions, carbonate anions, nitrate ions, nitrite ions, sulfate anions, sulfite anions, sulfonate anions, phosphate anions, phosphite anions, thiocyanate anions and amino acid ions. The method is high in separation efficiency, simple in technological process, easy to amplify, small in extraction agent loss, capable of being recycled and suitable for industrial production.

A secondary battery, a preparation method therefor, and an electrical device. The secondary battery comprises an electrode sheet. The electrode sheet comprises a current collector, an active material layer, and a base coating. The active material layer is located on at least one surface of the current collector. The base coating is located between the current collector and the active material layer. The base coating contains an additive, and anions of the additive comprise at least one of nitrate ions and nitrite ions. In the electrode sheet, the base coating is arranged between the current collector and the active material layer. The anions in the base coating comprise nitrate ions and nitrite ions, enabling the additive to gradually dissolve and diffuse into an electrolyte. In this way, the nitrate and nitrite undergo a reduction reaction, and the reduction product thereof becomes part of an SEI film to enable repair of the SEI film, thereby achieving thin, stable, and compact SEI films and significantly improving the cycle life of the battery.

A solid supplement composition comprising at least one non-ester nitrate compound and at least one isolated amino acid compound, wherein the at least one isolated amino acid compound is glutamine, wherein the at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound, and wherein the solid supplement composition comprises an amount of nitrate ion (NO3<sup2>−< / sup2>) that is at least about 0.05625 mg. A semisolid supplement composition comprising at least one non-ester nitrate compound and at least one isolated amino acid compound, wherein the at least one isolated amino acid compound is glutamine, wherein the at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound, and wherein the semisolid supplement composition comprises an amount of nitrate ion (NO3<sup2>−< / sup2>) that is at least about 0.05625 mg.

This material provides a useful component for increasing the content of Neisseria mucosa in the oral cavity. [Solution] An oral Neisseria mucosa increasing agent comprising a nitrate ion supply compound and one or more sugar alcohols selected from erythritol, xylitol, and mannitol as active ingredients.

Described herein are oral care compositions having: a surfactant system comprising four or more surfactants independently selected from the group consisting of non-sulfate anionic surfactants, amphoteric surfactants, nonionic surfactants, and amino acid surfactants; a source of stannous ions; a source of nitrate ions; and a source of phosphate radicals. Methods of making and using these compositions are also described.

The invention belongs to the technical field of forest tree genetic engineering breeding, and particularly relates to a CbuLBD19 gene for regulating and controlling root system development and nitrogen absorption and utilization of catalpa bungei and application of the CbuLBD19 gene. The nucleotide sequence of the CbuLBD19 gene is as shown in SEQ ID No.7, and the amino acid sequence coded by the CbuLBD19 gene is as shown in SEQ ID No.8. It is found that overexpression of the CbuLBD19 gene can cause reduction of the total root length and the root biomass of catalpa bungei. Meanwhile, the net absorption rate of nitrate ions in the root system, the activity of nitrate reductase (NR) and the content of amino acid are reduced, and the comprehensive expression is that nitrogen metabolism is reduced. The negative regulation and control function of the CbuLBD19 gene on the nitrogen absorption and utilization of the catalpa bungei is defined, and a technical route for improving the nitrogen absorption and utilization of the catalpa bungei by reducing the expression of the CbuLBD19 gene is provided.

A solid supplement composition comprising at least one non-ester nitrate compound and at least one isolated amino acid compound, wherein the at least one isolated amino acid compound is tryptophan, wherein the at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound, and wherein the solid supplement composition comprises an amount of nitrate ion (NO3—) that is at least about 0.05625 mg. A semisolid supplement composition comprising at least one non-ester nitrate compound and at least one isolated amino acid compound, wherein the at least one isolated amino acid compound is tryptophan, wherein the at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound, and wherein the semisolid supplement composition comprises an amount of nitrate ion (NO3—) that is at least about 0.05625 mg.

A solid supplement composition comprising at least one non-ester nitrate compound and at least one isolated amino acid compound, wherein the at least one isolated amino acid compound is beta alanine, wherein the at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound, and wherein the solid supplement composition comprises an amount of nitrate ion (NO3−) that is at least about 1 mg. A semisolid supplement composition comprising at least one non-ester nitrate compound and at least one isolated amino acid compound, wherein the at least one isolated amino acid compound is beta alanine, wherein the at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound, and wherein the semisolid supplement composition comprises an amount of nitrate ion (NO3−) that is at least about 1 mg.

Semisolid supplement compositions are disclosed comprising at least one non-ester nitrate compound and at least one isolated amino acid compound. The at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound. The composition contains at least about 0.05625 mg nitrate ion (NO3−).

The present invention relates to a method for phosphating metal surfaces, preferably alloy-galvanized steel strip surfaces, by treating them by dipping or spray-dipping with acidic, aqueous solutions which may contain magnesium ions, phosphate ions and nitrate ions and, for further improvement of the layer formation, possibly further ions selected from ammonium ions, alkali metal ions and / or fluoride ions, wherein the workpieces are simultaneously treated cathodically with a direct current.

The invention relates to a method for rapidly and efficiently determining high-concentration nitrate ions in an aqueous solution. The method specifically comprises the following steps: constructing a high-concentration NO3 <-> determination device; carrying out spectrum scanning on NO3 <-> and possible interferents, and determining an optimal measurement wavelength; the optical fiber probe is adjusted, the optical path is changed, and other parameters are not changed; taking ultrapure water as a reference, drawing standard curves under different optical paths, and determining an optimal measurement optical path; under the relatively optimal optical path, adjusting the concentration of the reference solution, drawing a standard curve under different reference solution concentrations, and determining the optimal reference concentration; under the relatively optimal optical path and the optimal reference solution concentration, adjusting a light decay device, changing the initial light intensity in the reference, drawing standard curves under different light intensities, and determining the better light intensity; and fitting the drawn standard curve, and verifying the fitted standard curve. The method is simple to operate, wide in measurement range and high in precision, and has wide application prospects in the fields of spent fuel post-treatment wastewater monitoring, military explosive wastewater monitoring and the like.