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124 results about "Aconitic acid" patented technology
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Aconitic acid is an organic acid. The two isomers are cis-aconitic acid and trans-aconitic acid. The conjugate base of cis-aconitic acid, cis-aconitate is an intermediate in the isomerization of citrate to isocitrate in the citric acid cycle. It is acted upon by the enzyme aconitase.
Fluorescent tracing scale inhibitor and preparation thereof
InactiveCN101475266AImprove performanceGood scale inhibitionScale removal and water softeningAconitic acidFluorescence
The invention provides a fluorescent tracing antisludging agent and a preparation method thereof. The fluorescent tracing antisludging agent is an aqueous solution with solid content of between 20 and 50 weight percent through a free radical polymerization reaction of aconitic acid or salts thereof, an unsaturated double bond monomer containing vinyl and a benzyloxy vinyl monomer containing pyrene fluorophore. The structural formula of the fluorescent tracing antisludging agent is the formula, wherein B represents a constitutional repeating unit of the polymerized unsaturated double bond monomer containing vinyl; M is combination of one or more of H, NH4, Na or K; and m, n, and p represent the degree of polymerization, wherein m is between 1 and 5,000, n is between 1 and 5,000, and p is between 1 and 5,000.
Owner:SOUTHEAST UNIV
Multifunctional foaming composition with wettability modifying, corrosion inhibitory and mineral scale inhibitory/dispersants properties for high temperature and ultra high salinity
The present invention is related to the obtaining and using of multifunctional foaming compositions with wettability modifying, corrosion inhibitory and inhibitory / dispersants mineral scale properties with high stability in environments of high temperature, high pressure and tolerance to high concentrations of divalent ions such as calcium, magnesium, strontium and barium. The multifunctional foaming compositions are obtained from the combination of supramolecular complexes resulting from interactions of alkyl amido propyl hydroxysultaines and / or alkyl amido propyl betaines and / or alkyl hydroxysultaines and / or alkyl betaines and anionic surfactant of type alkyl hydroxyl sodium sulfonate and alkenyl sulphonates of sodium, with cationic surfactants as tetra-alkyl ammonium halides and copolymers derivatives of itaconic acid / sodium vinyl sulfonate and / or terpolymers derived from itaconic acid / sodium vinyl sulphonate / aconitic acid. These multinational foaming compositions control the gas channeling and favorably change the wettability and increase the recovery factor of crude oil in naturally fractured reservoirs of carbonate type and heterogeneous lithology. In addition to this, the multifunctional foaming compositions of this invention exhibit anti-corrosive properties in typical environments of production tubing of crude oil and antifouling / dispersants of mineral salts as calcium carbonate, calcium sulfate, barium and strontium in the reservoir and in the production and injection pipelines.
Owner:INST MEXICANO DEL GASOLINEEO
A green synthesis method for carbon quantum dot bonded silica gel chromatography filler
InactiveCN106268715AEnhanced bondingHigh bonding capacityIon-exchange process apparatusComponent separationEpoxySynthesis methods
This invention has discloses a green synthesis method for carbon quantum dot bonded silica gel chromatography filler, which comprises the concrete steps of: mixing the solid powder of aconitic acid and tryptophan to be ground evenly, letting the mixture react under the temperature of 180oC- 200oC for 3 - 6 hours. Through dissolution, centrifugation and freeze drying of the generated solid, the amino-functionalized carbon quantum dots (NCDs) are obtained; After that, NCDs are dispersed in DES and added with gamma-glycidoxypropyl trimethoxy siloxane(GPTMS). Under the protection of N2 and the temperature of 55oC- 65oC, the mixture is stirred to react for 22 - 25 hours, then the silica gel (SiO2) is added to react for another 12 - 48 hours. Water and absolute ethyl alcohol are alternatively used to wash the raw product generated from the reaction. Silica gel chromatography filler modified by carbon quantum dots will be generated after drying. This green synthesis method realizes the surface bond of carbon quantum dots and silica gel through epoxy group and amino. DES used in the process of reaction is reaction solvent, which serves as an excellent dispersing agent for carbon quantum dots and silica gel, ensures higher bonded amount, and at the same time, meets the requirements of green chemistry.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Etchant composition
An etchant composition for silver or silver alloys which comprises at least one polycarboxylic acid, phosphoric acid, nitric acid, and water. The polycarboxylic acid preferably is at least one member selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid, aconitic acid, ketoglutaric acid, maleic acid, citraconic acid, malic acid, tartaric acid, and citric acid.
Owner:NAGASE CHEMTEX CORPORATION
Polycarboxylic acid-series water reducing agent with ultrahigh water absorbing capacity and preparation method and use method thereof
The invention discloses a polycarboxylic acid-series water reducing agent with ultrahigh water absorbing capacity and a preparation method and a use method thereof, belonging to the technical field of building materials. The water reducing agent consists of the following raw materials in parts by weight: 100 parts of unsaturated polyether (I), 10-18 parts of acrylic acid, 1-3 parts of acrylamide,1.25-9.25 parts of aconitic acid, 0.45-2.25 parts of hydrogen peroxide, 0.15-0.75 part of L-ascorbic acid, 0.12-0.48 part of mercaptoacetic acid, 0.12-0.48 part of mercaptopropionic acid, 6-10 parts of sodium hydrate and 125-195 parts of water. The invention provides a polycarboxylic acid-series water reducing agent having the advantages of simple process, convenience for operating, low raw material cost and ultrahigh water absorbing capacity, a preparation method and a use method. Self-made unsaturated polyether (I) DD-405 is used for replacing methyl allyl polyethenoxy ether, so that the raw material supply market of the polycarboxylic acid-series water reducing agent is expanded, raw material cost is reduced, and raw material price is stabilized. The polycarboxylic acid-series water reducing agent is suitable for construction projects of high-rise buildings, large-span bridges, marine drilling platforms, tunnels, dams and airports.
Owner:SHANGHAI DONGDA CHEM
Platinum complexes
InactiveCN101469004AGroup 8/9/10/18 element organic compoundsAntineoplastic agentsSulfate radicalsChlorogenic acid
The invention relates to platinum complexes of the upper right formula and pharmaceutically acceptable salts or solvates, wherein R1 and R2 are respectively and independently selected from H or C1-C4 alkyls, or R1 and R2 are coupled as shown by the lower right formula. X is selected from a 3,4-dinicotinic acid radical or a cis form aconitic acid radical; and Y which has the same case with Z is selected from a cinnamic acid radical, a ketoprofen acid radical, a chlorogenic acid radical, a caffeic acid radical or a ferulic acid radical; or Y is different from Z, wherein Y can be 1-methyl-3-pyridine carboxylic acid, and Z can be a sulfate radical. The invention also relates to a preparation method for the platinum complexes and application of the platinum complexes to the preparation of anticancer drugs.
Owner:NANJING SANHOME PHARMACEUTICAL CO LTD
Method for fermenting production of L-lysine through using aconitase expression weakened and/or enzymatic activity reduced bacteria
ActiveCN103146772AIncrease the amount of fermentationIncrease productionBacteriaMicroorganism based processesAconitaseMicrobiology
The invention provides a fermenting production method of L-lysine. The method comprises a step of modifying bacteria to reduce not disappear the aconitase expression level or the enzymatic activity of the bacteria, and a step of fermenting the modified bacteria to produce L-lysine. The invention also provides processes derived from the method, applications thereof, and polynucleotides, vectors and bacteria used in the processes and the method and the applications.
Owner:NINGXIA EPPEN BIOTECH
Compositions comprising combinations of organic acids
ActiveUS9326924B1Increased biofilm disruptionAccelerated destructionAntibacterial agentsCosmetic preparationsBiofilmOrganic acid
Provided are compositions comprising succinic acid, aconitic acid, and a carrier, wherein the succinic acid and aconitic acid are present in a ratio of from about 0.9:1 to about 40:1. Also provided are methods of disrupting a biofilm comprising applying to a surface having a biofilm a composition of the present invention.
Owner:JOHNSON & JOHNSON CONSUMER COPANIES
Etching composition and etching process
ActiveUS20110049088A1Decorative surface effectsCable/conductor manufactureGlutaric acidPropanoic acid
Owner:MITSUBISHI GAS CHEM CO INC
Biotechnological production of itaconic acid
The present invention provides a novel method and means of producing itaconic acid based on the use of the mammalian Immune response gene 1 (Irg1) and variants to express an enzyme which converts cis-aconitic acid to itaconic acid. The method includes cultivation a host cell comprising the Igr1 gene or variants thereof and obtaining itaconic acid.
Owner:UNIV DU LUXEMBOURG
Chitosan oligosaccharide fatty acid grafting-adriamycin bonded drug, preparation and applications
InactiveCN101564539ALow toxicitySolving Targeted DistributionsOrganic active ingredientsPharmaceutical non-active ingredientsCarbon chainFatty acid
The invention provides a chitosan oligosaccharide fatty acid grafting-adriamycin bonded pro-drug, which is prepared by the following steps of: dissolving doxorubicin hydrochloride into dimethyl sulfoxide, adding ethylamine to stir and dissolving the product into naphthyridine; then dissolving cis-aconitic acid anhydride into oxetone and dropping into adriamycin solution, stirring, extracting, and centrifugating to disperse the deposits into water, freezing and drying to obtain an adriamycin- cis-aconitic acid midbody; dissolving chitosan oligosaccharide fatty acid grafting into water, additionally taking the theadriamycin-cis-aconitic acid midbody and dripping the dimethyl sulfoxide liquid, dropping into the grafting agueous solution, stirring, dialyzing, freezing and drying, thus obtaining the chitosan oligosaccharide fatty acid grafting-adriamycin bonded pro-drug; wherein the molecular weight of chitosan oligosaccharide is between 1 and 200 kDa; the deacetylation is between 70 and 100 percent; the carbon chain length of the fatty acid is between C12 and C22; and the substitution degree of the amino group is between 1 and 50 percent. The adriamycin after bonded with the chitosan oligosaccharide fatty acid grafting has remarkable antitumor curative property, can reverse the drug tolerance of tumor cells and can be applied for preparing the antitumor drugs and the drugs which can reverse the drug tolerance of tumor cells.
Owner:ZHEJIANG UNIV
Sterilization Method
ActiveUS20130243650A1Effective vapor sterilizationEliminate accumulationBiocideLavatory sanitoryAcetic acidOrganic acid
Owner:EVONIK OPERATIONS GMBH
Multifunctional foaming composition with wettability modifying, corrosion inhibitory and mineral scale inhibitory/dispersants properties for high temperature and ultra high salinity
Owner:INST MEXICANO DEL GASOLINEEO
Nanometer-hydrous zirconium oxide-loading composite hydrogel having carboxyl and hydroxyl, preparation and applications thereof
ActiveCN105289543AImprove pore structureGood removal effectOther chemical processesAlkali metal oxides/hydroxidesReaction temperatureMonomer
The present invention provides a nanometer-hydrous zirconium oxide-loading composite hydrogel having carboxyl and hydroxyl, preparation and applications thereof. According to the present invention, two monomers such as 2-hydroxyethyl acrylate and trans-aconitic acid are mixed with distilled water, then radiation polymerization is performed to prepare a polymer hydrogel, the polymer hydrogel is adopted as a template to perform in-situ nanometer hydrous zirconium oxide loading, the in-situ nanometer hydrous zirconium oxide loading method is an in-situ chemical precipitation and heat treatment combination method, the concentration of a ZrOCl2 solution for the in-situ chemical precipitation reaction is 0.2-0.6 mol / L, the concentration of a NaOH solution is 0.6-1 mol / L, and the reaction temperature is controlled at 25 DEG C; and the nanometer hydrous zirconium oxide is subjected to in-situ loading, the method is simple, the operation is easy, heavy metals can be effectively removed by using the prepared composite hydrogel in adsorption of heavy metal ions in wastewater, and the service life of the composite hydrogel is long.
Owner:NANJING UNIV
Methods for preparing graphene dispersant and graphene/raw paint composite anti-corrosive coating
InactiveCN107964103ADisperse fastDispersion effectively makes graphene uniformNatural resin coatingsAnti-corrosive paintsAconitic acidOrganic solvent
The invention discloses methods for preparing a graphene dispersant and a graphene / raw paint composite anti-corrosive coating. The method for preparing the graphene dispersant comprises adding sodiumlignosulphonate, ammonium persulfate and deionized water into a reaction container, carrying out stirring so that the sodium lignosulfonate is fully dissolved, adding trans-1, 2, 3-aconitic acid and acrylamide into the solution for a reaction, then cooling the reaction solution to the room temperature, adding an organic solvent into the reaction solution drop by drop to separate solid precipitates, filtering the solid precipitates to obtain a crude product, and purifying and drying the crude product to obtain the graphene dispersant. The method for preparing the graphene / raw paint composite anti-corrosive coating comprises dissolving the graphene dispersant in water, carrying out ultrasonic treatment for full dissolution, adjusting pH to greater than 7, adding graphene into the solution, carrying out uniform ultrasonic mixing to obtain a graphene dispersion liquid, adding the graphene dispersion liquid into raw paint and carrying out uniform stirring to obtain the graphene / raw paint composite anti-corrosive coating.
Owner:FUJIAN NORMAL UNIV
Trans-aconitic acid producing bacteria and application thereof
The invention belongs to the field of microbe biotechnology and relates to the field of biological pesticides. Two trans-aconitic acid producing bacteria, that is, bacillus thuringiensis YBT-1501 and bacillus thuringiensis YBT-1520 are obtained from bacillus thuringiensis through screening; through utilizing the fermentation products of the two strains, the coarse and refine product of the trans-aconitic acid can be obtained; according to bioassay, the trans-aconitic acid has the activity of poisoning and killing meloidogyne incognita, heterodera glycine ichinohe and ditylenchus destructor, and the activity of suppressing the growth of cotton bollworm and housefly. The trans-aconitic acid producing bacteria are novel biological disinsection pesticides and a novel prevention and cure way for the current prevention and cure strategy is provided. The bacillus thuringiensis YBT-1501 which is used for preparing the trans-aconitic acid is preserved in the China Center for Type Culture Collection, with the serial number of CCTCC NO: M2012236.
Owner:HUAZHONG AGRI UNIV
Bacteria fermenting and producing L-lysine method by using changed aconitase to regulate and control unit
ActiveCN103131738AIncrease the amount of fermentationIncrease productionBacteriaMicroorganism based processesBiotechnologyAconitase
Owner:NINGXIA EPPEN BIOTECH
Glucan-containing pharmaceutical composition and preparation method thereof
ActiveCN103041403AReduce releaseLow toxicityOrganic active ingredientsPharmaceutical non-active ingredientsBiological bodyAconitic acid
The invention discloses a glucan-containing pharmaceutical composition which comprises glucan-polyethyleneimine and a pharmaceutically active component activated by cis-aconitic acid anhydride. Glucan and polyethyleneimine are bonded through urethane bonds, cis-aconitic acid anhydride and the pharmaceutically active component are bonded through amide bonds, and the pharmaceutically active component activated by cis-aconitic acid anhydride and glucan-polyethyleneimine are bonded through amide bonds which are jointed between cis-aconitic acid anhydride and polyethyleneimine. After entering a human body, the glucan-containing pharmaceutical composition forms a shell-core structure, can not be identified by the reticuloendothelial system, and gradually concentrates at the site of a tumor mass. Under the acidic conditions of the tumor site, the amide bonds between the pharmaceutically active component activated by cis-aconitic acid anhydride and polyethyleneimine are broken to release a large amount of the pharmaceutically active component, while the release of the pharmaceutically active component at other sites is extremely low, thus, the toxicity to the health cells is reduced, and the toxic or side effect is reduced. The invention discloses a preparation method of the glucan-containing pharmaceutical composition mentioned above.
Owner:SHENZHEN INST OF ADVANCED TECH
Preparation of flax surface Sudan red molecularly imprinted adsorption material
InactiveCN104289202AHigh selectivitySpecific recognition abilityOther chemical processesAconitic acidBulk polymerization
The invention discloses a preparation method of a flax surface Sudan red molecularly imprinted adsorption material, and is characterized in that with aconitic acid and ethylene glycol dimethacrylate as functional monomers, Sudan red as a template molecule, flax as a supporting body, and azodiisobutyronitrile as an initiator, the flax surface Sudan red molecularly imprinted adsorption material is prepared by a bulk polymerization method. The flax surface Sudan red molecularly imprinted adsorption material can separate Sudan red and a structural likeness under conditions of normal temperature and normal pressure; and the flax surface Sudan red molecularly imprinted adsorption material prepared by the method has particular holes, has a specific recognition ability on Sudan red molecules, has the advantages of relatively high selectivity, good mechanical performance, no adsorption of other coexisting substances, quite good chemical stability, fast adsorption speed, easy elution, biodegradability, simple process, environmental friendliness and the like, and has a regeneration capacity.
Owner:UNIV OF JINAN
Recombinant yeast strain for generating itaconic acid, and construction method and application thereof
InactiveCN107058144AStrong toleranceStrong application valueFungiMicroorganism based processesBiotechnologyYeast
The invention discloses a recombinant yeast strain for generating itaconic acid, and a construction method and application thereof. The recombinant yeast strain is acquired in the manner of taking C. glycerolgenesis as an original strain and inserting aconitate decarboxylase gene into the C. glycerolgenesis gene. The recombinant plasmid of a genetic expression box containing aconitate decarboxylase gene Pgap-CadA-Tgap-zeocin is constructed through genetic engineering reformation, the recombinant plasmid is linearized and then is inserted into a C. glycerolgenesis genome for expressing aconitate decarboxylase and catalyzing aconitate, and then the itaconic acid can be acquired. The recombinant yeast strain provided by the invention can synthesize itaconic acid, and a new thought is provided for producing itaconic acid.
Owner:JIANGNAN UNIV
Non-phosphorus scale and corrosion inhibitor employing seawater as circulating cooling water, and preparation method thereof
ActiveCN104140162ASolve the problem of corrosion and scalingHigh corrosion and scale inhibition performanceScale removal and water softeningGluconic acidCopolymer
The invention belongs to the technical field of water treatment, and particularly relates to a non-phosphorus scale and corrosion inhibitor employing seawater as circulating cooling water and a preparation method thereof. The non-phosphorus scale and corrosion inhibitor is prepared from the following raw materials by weight percent: 2-6% of a mannich alkali quaternary ammonium salt, 5-20% of an aconitic acid-allyl sulfonate copolymer, 4-10% of a polyepoxysuccinic acid, 1-5% of a natural corrosion inhibitor, 5-15% of sodium gluconate, 3-5% of heptahydrate, 0.6-1.1% of BTA, and the balance of deionized water. The non-phosphorus scale and corrosion inhibitor has high scale and corrosion inhibitor performances, the problems of corrosion and scaling of the seawater as the circulating cooling water can be solved, and the non-phosphorus scale and corrosion inhibitor is especially suitable for various circulating water systems employing copper, carbon steel and stainless steel as materials, is free of phosphorus, and has good environmental protection property.
Owner:山东合润环境科技有限公司 +1
Preparation method of molecular imprinting sensor for detecting anthocyanin
InactiveCN107179346AHigh affinityHigh selectivityMaterial electrochemical variablesOxygenGlycol methacrylate
The invention discloses a preparation method of a molecular imprinting sensor for detecting anthocyanin. The preparation method is characterized by including the steps: firstly, modifying a glassy carbon electrode by the aid of graphene oxide; secondly, adding 15-20% of deionized water, 50-60% of absolute ethyl alcohol, 6-10% of ethylene glycol dimethacrylate, 5-8% of aconitic acid, 10-15% of 1-allyl-3-methyl imidazole bromide, 1.0-3% of azobisisoheptonitrile and 0.2-2.0% of anthocyanin into a reactor, performing reaction for 12-15h in a stirring manner at the temperature of 55+ / -2 DEG C under oxygen-free atmosphere, soaking a product for 6-8h by the aid of mixed solution of ethyl alcohol and acetic acid, removing template molecules, and performing drying to obtain an anthocyanin molecular imprinting polymer; finally, dispensing the anthocyanin molecular imprinting polymer on modified graphene oxide to obtain the molecular imprinting sensor of the anthocyanin. The volume ratio of the ethyl alcohol to the acetic acid is 8:1. The sensor has high affinity and selectivity, is high in sensitivity, good in specificity and rapid in detection and can be repeatedly used.
Owner:UNIV OF JINAN
Sterilization method
ActiveUS8865066B2Effective sterilizationEliminate accumulationDrying solid materials with heatMachines/enginesOrganic acidAcetic acid
Owner:EVONIK OPERATIONS GMBH
Multifunctional foaming composition with wettability modifying, corrosion inhibitory and mineral scale inhibitory/dispersants properties for high temperature and ultra high salinity
The present invention is related to the obtaining and using of multifunctional foaming compositions with wettability modifying, corrosion inhibitory and inhibitory / dispersants mineral scale properties with high stability in environments of high temperature, high pressure and tolerance to high concentrations of divalent ions such as calcium, magnesium, strontium and barium. The multifunctional foaming compositions are obtained from the combination of supramolecular complexes resulting from interactions of alkyl amido propyl hydroxysultaines and / or alkyl amido propyl betaines and / or alkyl hydroxysultaines and / or alkyl betaines and anionic surfactant of type alkyl hydroxyl sodium sulfonate and alkenyl sulphonates of sodium, with cationic surfactants as tetra-alkyl ammonium halides and copolymers derivatives of itaconic acid / sodium vinyl sulfonate and / or terpolymers derived from itaconic acid / sodium vinyl sulphonate / aconitic acid. These multinational foaming compositions control the gas channeling and favorably change the wettability and increase the recovery factor of crude oil in naturally fractured reservoirs of carbonate type and heterogeneous lithology. In addition to this, the multifunctional foaming compositions of this invention exhibit anti-corrosive properties in typical environments of production tubing of crude oil and antifouling / dispersants of mineral salts as calcium carbonate, calcium sulfate, barium and strontium in the reservoir and in the production and injection pipelines.
Owner:INST MEXICANO DEL GASOLINEEO
Preparation method of polyethylene glycol modified nano-micelle or vesicle with pH (potential of hydrogen) responsivity and high drug loading capacity
ActiveCN108078924AFacilitated releaseHigh drug loadingOrganic active ingredientsPharmaceutical non-active ingredientsTumor therapyDrug loading dose
The invention belongs to the field of high polymer materials and biomedical engineering and particularly relates to a preparation method of a polyethylene glycol modified nano-micelle or a vesicle with pH (potential of hydrogen) responsivity and high drug loading capacity. The method comprises the steps of allowing polyethylene glycol and cis-aconitic acid anhydride modified doxorubicin to give areaction to generate an amphipathic segmented copolymer, and obtaining the nano-micelle or the vesicle with the pH responsivity and the high drug loading capacity by taking an anticancer drug, namelydoxorubicin as a hydrophobic chain segment and polyethylene glycol as a hydrophilic chain segment. The nano-micelle or the vesicle takes the anticancer drug as the hydrophobic chain segment, and therefore, has the higher drug loading capacity; at the same time, cis-aconitic acid anhydride is sensitive to acid; and therefore, the prepared nano-micelle or the vesicle has the pH responsivity, is applicable to the field of tumor therapy, can improve chemotherapy efficiency and reduces toxic and side effects of the anticancer drug on normal tissues.
Owner:TONGJI UNIV
Etching composition and etching process
InactiveUS20070278185A1Decorative surface effectsSurface treatment compositionsPropanoic acidGlutaric acid
An etching composition which comprises at least one organic carboxylic acid compound selected from acetic acid, propionic acid, butyric acid, succinic acid, citric acid, lactic acid, malic acid, tartaric acid, malonic acid, maleic acid, glutaric acid, aconitic acid, 1,2,3-propanetricarboxylic acid and ammonium salts of these acids, a polysulfonic acid compound and water, and an etching process which comprises etching a conductive film comprising zinc oxide as the main component using the etching composition described above.
Owner:MITSUBISHI GAS CHEM CO INC
Means and Methods for Itaconic Acid Production
ActiveUS20170096690A1Produce lotPrevent feedback inhibitionPeptidesOxidoreductasesBiochemistryExpression cassette
The present invention relates to a method of producing itaconic acid. Further the present invention relates to nucleic acids encoding an aconitate-delta-isomerase (ADI) and trans-aconitate decarboxylase (TAD) and uses of such nucleic acids. Provided is additionally a recombinant host cell engineered to overexpress nucleic acids of the present invention. Furthermore an expression cassette and a vector are provided which include the respective nucleic acid.
Owner:RWTH AACHEN UNIVERSITY
Structural sealant for glass curtain wall and preparation method for structural sealant
ActiveCN104962221AHigh mechanical strengthImprove adhesionNon-macromolecular adhesive additivesOther chemical processesSilanesPolypropylene
The invention discloses a structural sealant for a glass curtain wall and a preparation method for the structural sealant. A formula of the structural sealant consists of the following components: hydroxyl-terminated polydimethylsiloxane with viscosity of 55000 to 65000mPa.s, hydroxyl-terminated polydimethylsiloxane with viscosity of 3000 to 4000mPa.s, acrylic acid, aconitic acid, polypropylene powder, bis(3,4-dimethyl benzylidene) sorbitol, trimethoxyboroxine, 2-amino-N-cyclohexyl acetamide, vinyl tris(methylethylketoximino)silane, ethylene glycol glycidyl ether, dibutyltin mercaptide, hollow glass bead, methyl-tri-butanone-oxime silane, 3-amino propyl triethoxysilane, dibutyltin dilaurate and ammonium persulfate. The structural sealant for the glass curtain wall is excellent in mechanical strength, free of priming coat in use, good in caking property, excellent in comprehensive performance, good in ageing resistance, and capable of being applied to a high-displacement occasion.
Owner:香山红叶集团有限公司
HPLC method for measuring seven organic acids in jackinthepulpit tuber simultaneously
ActiveCN110243969AEvaluate quality effectivelyEvaluation qualityComponent separationOrganic acidHplc method
The invention provides an HPLC method for measuring four organic acids (oxalic acid, L-malic acid, citric acid and fumaric acid) in jackinthepulpit tuber simultaneously. Another three organic acids (succinic acid, cis-aconitic acid and trans-aconitic acid) also can be measured simultaneously in the method. According to the HPLC measuring method provided by the invention, various organic acid ingredients in the medicinal material of jackinthepulpit tuber can be measured simultaneously, the method is simple in operation, high in sensitivity, high in specificity and high in accuracy, and the quality of the medicinal material of jackinthepulpit tuber can be evaluated effectively.
Owner:CHENGDU UNIV OF TRADITIONAL CHINESE MEDICINE
Method for preparing stannic oxide by dissolution pyrolysis method
The invention discloses a method to prepare tin oxide by dissolving pyrolysis, which comprises: dissolving the tin source and organic acid in reactor at 20-290Deg; stirring and reacting for 0.1-240h to obtain the predecessor; putting the predecessor into muffle furnace for calcining and pyrolysis at temperature more than 280Deg to obtain the product. Wherein, selecting on organic acid arbitrarily from the acetic acid, oxalic acid, citric acid, tartaric acid or aconitic acid; between the dissolution and pyrolysis, using any one of water, alcohol, ethyl ether, acetone or chloroform to clear the predecessor. This invention is simple and low cost, and has high purity.
Owner:HENAN NORMAL UNIV
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