16results about How to "Mild response" patented technology

The invention discloses a lactobacillus delbrueckii subsp. Bulgaricus CCFM1520 for transforming curcumin to produce tetrahydrocurcumin to relieve nervous anxiety, and belongs to the technical field of microorganisms. The lactobacillus delbrueckii subsp. Bulgaricus CCFM1520 screened by the invention has the capability of converting curcumin, and can utilize curcumin and generate tetrahydrocurcumin. The invention further provides a synbiotic preparation prepared from the lactobacillus gasseri CCFM1481 and curcumin, the synbiotic preparation can be used as an anti-fatigue functional medicine, the individual behavioral memory level can be improved, the imbalance of body neurotransmitters (DA, 5-HT and NE) can be slowed down, the expression of body neuroprotection related genes (BDNF, TrkB, DRD1 and TH) can be improved, and the synbiotic preparation has a huge application prospect.

This invention discloses a wide-interlayer-spacing molybdenum disulfide catalyst, its preparation method, and its application, belonging to the field of water electrolysis for hydrogen production energy conversion technology. The preparation method includes the following steps: preparing a molybdenum disulfide precursor solution using a molybdenum source and a sulfur source; then subjecting the molybdenum disulfide precursor solution to a hydrothermal reaction with a carbon-containing interlayer-spacing regulator; and obtaining the wide-interlayer-spacing molybdenum disulfide catalyst after centrifugation and washing. The carbon-containing interlayer-spacing regulator is used to insert into the interlayer of molybdenum disulfide during the hydrothermal reaction, increasing the interlayer spacing of the (002) crystal planes of the obtained molybdenum disulfide catalyst. The wide-interlayer-spacing molybdenum disulfide catalyst of this invention facilitates electrolyte penetration and hydrogen bubble release, effectively avoids active site blockage, enhances the intrinsic conductivity of the catalyst, accelerates internal charge transport, increases active sites for hydrogen evolution reaction, and improves the intrinsic hydrogen evolution catalytic activity of the catalyst.

The application discloses a preparation method of zolmitriptan, relates to the technical field of drug synthesis, and comprises the following steps: adding compound 1 and reagent 1 into solvent 1 to perform a first reaction to obtain compound 2; adding the compound 2, reagent 2 and reagent 3 into solvent 2 to perform a second reaction to obtain compound 3 and the like. Compared with the prior art, the application provides a novel synthetic route for preparing zolmitriptan, the route uses L-4-bromophenylalanine as a starting material, and new synthetic steps are adopted, such as using reagent 5, such as a t-butyl alcohol metal salt and sodium hydride, to construct the oxazolidinone structure in zolmitriptan and using a coupling reaction to construct the indole ring in zolmitriptan, so that the yield of the obtained target product is significantly improved, the use of high-toxicity and high-risk reagents in the existing synthetic route is effectively avoided, and a mild, efficient, green and environmentally-friendly synthetic route for preparing zolmitriptan is provided.

This invention belongs to the field of hollow multi-component nanomaterial preparation technology, specifically disclosing a hollow Cu3NbSe4 nanomaterial, its preparation method, and its application. The microstructure of the nanomaterial is a nanoscale hollow cubic structure. The preparation method includes: (1) dissolving niobium source and selenium source separately in oleylamine solvent by heating for later use; (2) treating the soluble copper source and the niobium source dissolved in (1) in a high-boiling-point organic solvent for deoxygenation and dehydration, and then carrying out a solvothermal reaction; (3) when (2) is heated to a certain temperature, injecting the selenium source dissolved in (1) to carry out a solvothermal reaction, and separating the obtained solid product after the reaction is completed. The synthesis process of this invention is simple, the reaction conditions are mild, and the energy consumption and cost are low; more importantly, it realizes the preparation of hollow Cu3NbSe4 nanomaterial with uniform morphology and size, high crystallinity, and stronger light absorption capacity, and the prepared hollow Cu3NbSe4 shows excellent performance in photocatalytic hydrogen production.

The application belongs to the field of nanometer material preparation, and particularly relates to a hollow polydopamine nanometer material coordinated with multiple metal ions, a synthesis method and application. The application is Co / Fe / Ni-Zn polydopamine coordinated with multiple metal ions, has a hollow structure, the particle size of Fe-Zn polydopamine coordinated with multiple metal ions is 238-272nm, the particle size of Co-Zn polydopamine coordinated with multiple metal ions is 45-56nm, and the particle size of Ni-Zn polydopamine coordinated with multiple metal ions is 58-70nm. The application forms the hollow polydopamine nanometer material coordinated with multiple metal ions with controllable size through an etching template method, which is different from a single polydopamine structure, the prepared composite material has good crystallinity, is uniformly and stably dispersed, has higher nanometer enzyme catalytic activity, and has a good application prospect in solar cells, biological photothermal imaging and treatment, and drug loading.

The application discloses a method for preparing 4-halogen-2-methyl-2-butenoic acid alkyl ester, which is prepared by a Reformatsky reaction with halogenated acetaldehyde and 2-bromine zinc propionate as raw materials. The reaction has mild conditions, good economy, no toxicity and harm, and high safety factor, and is suitable for industrial large-scale production. The Reformatsky S reaction and the subsequent dehydration reaction generate mainly inorganic solid waste zinc halide as well as a small amount of organic by-products, and the reaction solvent can be recycled, so that the pollution is very small.

The application discloses a method for treating dibenzene organic pollutants in water bodies, which comprises the following steps: electrolyzing wastewater to be treated and adding dithionite to carry out a redox reaction to obtain purified water; and the wastewater to be treated contains sodium chloride and dibenzene organic pollutants. The method for treating dibenzene organic pollutants in water bodies is carried out under normal temperature and pressure, is mild in reaction, is environmentally friendly, is easy to operate, is low in cost, has good degradation effect on dibenzene organic pollutants in the environment, and has great application potential in the field of environmental pollution treatment.

The application discloses a kind of synthesis methods of high-purity 2-bromo-6-nitrobenzaldehyde, belong to organic synthesis technical field, the synthesis method is at 20-30 ℃, 1,2-dichloroethane, 2-bromo-6-nitrotoluene is mixed, stirring is dissolved, N-bromine phthalimide and initiator are mixed, heating to 70-100 ℃, reflux reaction, cooling to 20-30 ℃, post-processing is obtained compound A;Compound A is mixed with acetonitrile, temperature control is 0-10 ℃, batch is added urotropine, stirring is at 20-40 ℃, acetic acid is added, stirring is at 70-100 ℃, post-processing is obtained 2-bromo-6-nitrobenzaldehyde;The synthesis method of the application can solve the problems of low product yield, low purity, poor quality, serious three waste pollution, high cost and difficult industrialization existing in the prior art of 2-bromo-6-nitrobenzaldehyde synthesis method.

The present application relates to the field of environmental monitoring and chemical analysis technology, and discloses a kind of determination method of ammonia nitrogen in tail liquid of comprehensive utilization of platinum-containing waste catalyst, comprising the following steps: S1, sample dilution: accurately pipetting 1.00mL to-be-measured tail liquid, placing in 100mL volumetric flask, with ammonia-free pure water constant volume to the scale and fully mixed, to obtain A solution, to achieve 100 times controllable dilution.The present application effectively solves the core technical problems such as high acid inhibition of color development, aluminum ion precipitation embedding ammonia nitrogen, liquid alkali dilution, and exogenous nitrogen pollution through targeted pretreatment process and determination integration technology, fills the blank of special ammonia nitrogen determination method for such complex matrix samples, and meets the needs of laboratory routine monitoring and industrial application.

The application discloses a preparation method of 2,4-dichlorophenoxyacetic acid synthesized by composite molecular sieve ZSM-5 and a water-reducing process, and relates to the following steps: under alkaline conditions, 2,4-dichlorophenol is reacted with a sodium chloroacetate solution under the catalysis of a composite molecular sieve catalyst to obtain 2,4-dichlorophenoxyacetic acid sodium salt crude product through condensation; and then hydrolysis and hydrochloric acid acidification are carried out to obtain 2,4-dichlorophenoxyacetic acid product. The process can reduce energy consumption, shorten reaction time and reduce production cost in obtaining 2,4-dichlorophenoxyacetic acid, and can improve the conversion rate and yield of the product and the color of the product. When a new batch of 2,4-dichlorophenoxyacetic acid sodium salt crude product is dissolved in the acidification reaction, the washing water of the last batch of 2,4-dichlorophenoxyacetic acid is used as the solvent reaction liquid, and the washing water of the last batch is used for the first water washing of the final product and is used in turn. The water consumption is reduced, the wastewater treatment cost is reduced, the conversion rate and yield of the product are improved, the product has high purity, the process is simple, the conditions are mild, and the raw materials can be recycled.

The application discloses a camphor sapogenin cinnamic acid derivative with bursaphelenchus xylophilus killing activity and a preparation method thereof. In the preparation method, the camphor sapogenin is protected at a C28-OH derivative site to obtain an intermediate I; other hydroxyl groups on the camphor sapogenin are protected by using triethylamine as a catalyst and acetic anhydride to obtain an intermediate II; the C28-OH derivative site is deprotected by using a hydrochloric acid methanol solution to obtain an intermediate III; trans-cinnamic acid is subjected to acylation reaction with the C28-OH derivative site to generate an intermediate IV; nucleophilic addition reaction is performed on an amino group on a p-aminophenol and an aldehyde group in the intermediate IV to obtain an intermediate V; acetyl chloride is used to remove acetyl groups on the camphor sapogenin, and finally the camphor sapogenin cinnamic acid derivative is prepared. The camphor sapogenin cinnamic acid derivative of the application significantly improves the bursaphelenchus xylophilus resistance by means of active group cooperation, the process is simple, the reaction is mild, and the application is suitable for industrial production.

The present application belongs to zinc-nickel alloy plating layer, and particularly relates to an alkaline stripping solution for removing unqualified zinc-nickel alloy plating layer, a preparation method and application thereof. In order to safely and efficiently remove unqualified zinc-nickel alloy plating layer, the present application provides an alkaline stripping solution, which is composed of the following components in terms of mass concentration: main salt: NaOH 100-180 g / L; oxidizing agent: sodium nitrate 180-200 g / L and NaClO 10-20 g / L; complexing agent: salicylaldehyde oxime 30-50 g / L and diethylene triamine 30-50 g / L; corrosion inhibitor: 2-acetylpyrrole or 4-piperidine carboxamide 2-10 g / L; wetting agent: sodium dodecyl sulfate 0.5-1.5 g / L. After the components in the alkaline stripping solution are mixed in proportion, the alkaline stripping solution can be directly used for removing unqualified zinc-nickel alloy plating layer, the stripping rate reaches 0.6-1 um / min, and the stripping temperature range is wide without damaging the substrate.

The invention discloses a method for synthesizing amide by inducing amine and carbon dioxide through visible light. According to the method, an amine olefin compound is used as a reaction substrate, carbon dioxide is used as a carbonyl source, an organic solvent is used as a reaction medium, mercaptan is used as a hydrogen atom transfer reagent, a photocatalyst, phosphine substances and organic alkali are added, and the corresponding amide compound is generated through reaction under irradiation of visible light. According to the method, carbon dioxide is used as a carbonyl source for photocatalytic synthesis of amide, so that the method can be used as an effective way for recycling carbon dioxide, CO2 emission is effectively reduced, a high-added-value fine chemical amide compound can be obtained, dangerous articles such as transition metal and an activated coupling agent do not need to be added, and the method is environment-friendly. And environmental pollution caused by generation of a large amount of transition metal wastes is avoided.

The invention discloses a naphthalene ring derivative, a synthesis method and application, and provides a series of novel naphthalene ring derivatives substituted by different functional groups. Compared with the existing naphthalene ring derivative, the naphthalene ring derivative provided by the invention is a functional group substituted naphthalene ring, and is easily subjected to subsequent chemical conversion and further converted into a high-added-value compound. According to the efficient synthesis method of the naphthalene ring derivative, the substrate applicability is wide, raw materials are cheap, synthesis is easy, high temperature and use of a catalyst are not needed in the reaction process, and various substituent-substituted naphthalene ring compounds can be prepared. The reaction process is milder, the safety is high, the post-treatment difficulty is reduced, high temperature and high pressure are not needed, only visible light irradiation is needed, meanwhile, the use of expensive metal catalysts and organic photocatalysts is avoided, and the post-treatment difficulty is reduced. The method also has the advantages of simple operation, simple steps, high yield, large-scale synthesis and the like.

This invention relates to the technical field of polymers, and more particularly to a long-chain branched poly(4-methyl-1-pentene), its preparation method, and its applications. The general structural formula of the long-chain branched poly(4-methyl-1-pentene) is shown in Formula I: where R is selected from C1-C8 alkyl groups, m is selected from natural numbers 2-10, and n is selected from natural numbers 0-50. A comonomer is obtained by reacting raw materials including α,ω-non-conjugated dienes and organosiloxane monomers; the comonomer is then polymerized with 4-methyl-1-pentene to obtain the long-chain branched poly(4-methyl-1-pentene). The preparation method is simple, the reaction is mild, the comonomer conversion rate is high, no complicated pretreatment or post-treatment processes are required, and conventional Ziegler-Natta catalysts can meet the requirements, showing broad prospects for industrial production. The selected raw materials are all commonly used in industry, and no special raw materials are required, ensuring cost-effectiveness and suitability for industrial applications.