224 results about "Barbituric acid" patented technology

A kit for dental adhesive comprising a radical polymerizable monomer having an acid group in the molecule, a photosensitizer and / or a peroxide, a water-soluble organic solvent, an organic sulfinic acid and / or a salt thereof or a barbituric acid and / or a derivative thereof, and water. The kit may further comprises a radical polymerizable monomer which has no acid group and is insoluble or hardly soluble in water, an amine compound, a silane coupling agent and a 1,3,5-triazine-2,4-dithion derivative. By using this kit, the adhesive composition can be applied directly to a dentine without conducting a pretreatment.

A method of N-alkoxyalkylating ureides according to the invention comprises reacting a ureide of structure I with an alkylating agent of structure III in the presence of a basic catalyst in an aprotic reaction medium. The ureide may be a 5,5-disubstituted barbituric acid, or it may be phenytoin, glutethimide, and ethosuximide. The alkylating agent is an ester of a sulfonic acid. The base may be a hydride or amine. A preferred process comprises N-alkoxyalkylating 5,5-diphenyl-barbituric acid with methoxymethyl methanesulfonate in the presence of di-isopropyl ethyl amine and isolating the resultant N,N′-bismethoxymethyl-5,5-diphenyl-barbituric acid. The invention also contemplates the novel compounds N-methoxymethyl-5,5-diphenylbarbituric acid, N-methoxymethyl ethosuximide, and N-methoxymethyl glutethimide, and a method comprising administering them to a patient.

A versatile, eco-friendly, and efficient method for the convenient conversion of esters and ester-like compounds into amides, peptides, carbamates, ureas, oxamides, oxamates, hydrazides, oxazolidinones, pyrazolones, oxazolidinediones, barbituric acids, and other molecules containing one or more OCN moieties in the presence of a diol or polyol is disclosed.

The present invention is directed to a gel polymer electrolyte for use in rechargeable polymer secondary batteries and a precursor composition thereof. The precursor composition can be injected into an aluminum shell of a battery cell, which undergoes in-situ heating polymerization by heating and forms a gel polymer electrolyte penetrating a partition membrane therein. The precursor composition contains (meth)acrylic (acrylate) monomers and a modified bismaleimide oligomer resulting from a reaction of barbituric acid and bismaleimide.

A gel polymer electrolyte precursor and a rechargeable cell comprising the same are provided. The gel polymer electrolyte precursor comprises a bismaleimide monomer or bismaleimide oligomer, a compound having formula (I):, a non-aqueous metal salt electrolyte, a non-protonic solvent, and a free radical initiator, wherein the bismaleimide oligomer is prepared by reaction of barbituric acid and bismaleimide, X comprises oxygen, organic hydrocarbon compounds, organic hydrocarbon oxide compounds, oligomers or polymers, n is 2 or 3, and A independently compriseswherein m is 0˜6, X comprises hydrogen, cyano, nitro or halogen, and R1 independently comprises hydrogen or C1˜4 alkyl.

A composition having a bismaleimide oligomer and preparation methods thereof are provided. The composition having a bismaleimide oligomer comprises a bismaleimide oligomer, wherein the bismaleimide oligomer is in an amount of more than 75 parts by weight, based on 100 parts by weight of the composition. Specifically, the bismaleimide oligomer is prepared by reacting bismaleimide monomers with batch-added barbituric acid.

The present invention provides a dental resin cement which is excellent in a mechanical strength, workability and storage stability, and a dental primer which significantly improves adhesiveness of the dental resin cement both to enamel and dentin of a tooth. According to the present invention, a salt of barbituric acid is used as a polymerization initiator in the dual-cure two-paste type dental resin cement being excellent in workability and storage stability to improve the storage stability, and a primer containing barbituric acid and amine is applied to a surface of a tooth to significantly improve adhesiveness of the dental resin cement both to enamel and dentin of teeth.

The present invention provides a dental resin cement which is excellent in a mechanical strength, workability and storage stability, and a dental primer which significantly improves adhesiveness of the dental resin cement both to enamel and dentin of a tooth. According to the present invention, a salt of barbituric acid is used as a polymerization initiator in the dual-cure two-paste type dental resin cement being excellent in workability and storage stability to improve the storage stability, and a primer containing barbituric acid and amine is applied to a surface of a tooth to significantly improve adhesiveness of the dental resin cement both to enamel and dentin of teeth.

The invention provides a test method, which includes the following steps: distilling soil in pH<2 acidic medium, hydrogen cyanide is formed, absorbing with the sodium hydrate solution, and analyzing total cyanide in soil with isonicotinic acid-barbituric acid spectrophotometry. The invention has the advantages of good sensitivity and good repeatability, which provides a convenient and reliable method for analyzing total cyanide in soil, and meets the needs of soil pollutant analysis as well as research work.

This invention pertains to active barbituric acid analogs which inhibit HIF-1 activity (e.g., the interaction between HIF-1$g(a) and p300) and thereby inhibit angiogenesis, tumorigenesis, and proliferative conditions, such as cancer. The present invention also pertains to pharmaceutical compositions comprising such compounds, and the use of such compounds and compositions, both in vitro and in vivo, to inhibit HIF-1 activity, and to inhibit angiogenesis, tumorigenesis, and proliferative conditions, such as cancer.

A photoelectric conversion device comprising an organic dye-sensitizing semiconductor fine particle thin film is prepared by using a dye having a barbituric acid structure as a partial structure and by adsorbing the dye on a semiconductor thin film electrode, and thereby a low-cost photoelectric conversion device having high conversion efficiency, and a solar cell using the device are provided.

The invention relates to a preparation method and application of a C3N5 material, and belongs to the technical field of photocatalysis. The technical problem to be solved by the invention is to provide the preparation method of the C3N5 material. The method comprises the following steps: a, uniformly mixing 3-amino-1,2,4-triazole and a six-membered nitrogen heterocycle according to a weight ratioof the 3-amino-1,2,4-triazole to the six-membered nitrogen heterocycle of 1:(0.8-1.2) to obtain uniformly-mixed powder, wherein the six-membered nitrogen heterocycle is at least one selected from cyanuric acid and barbituric acid; and b, heating the uniformly-mixed powder, performing heat preservation at 480-520 DEG C for 2.5-3.5 h, performing cooling, taking out the cooled material, performing washing, and performing drying to obtain the C3N5 material. According to the method provided by the invention, when the C3N5 material is prepared, the mixture of the 3-amino-1,2,4-triazole and the specific six-membered nitrogen heterocycle is adopted as a raw material, the preparation method is simple, and the C3N5 material obtained by the method has better photocatalytic activity and can be widelyused as a photocatalyst.

A method of N-alkoxyalkylating ureides according to the invention comprises reacting a ureide of structure I: with an alkylating agent of structure III: in the presence of a basic catalyst in an aprotic reaction medium. The ureide may be a 5,5-disubstituted barbituric acid, or it may be phenytoin, glutethimide, and ethosuximide. The alkylating agent is an ester of a sulfonic acid. The base may be a hydride or amine. A preferred process comprises N-alkoxyalkylating 5,5-diphenyl-barbituric acid with methoxymethyl methanesulfonate in the presence of di-isopropyl ethyl amine and isolating the resultant N,N′-bismethoxymethyl-5,5-diphenyl-barbituric acid. The invention also contemplates the novel compounds N-methoxymethyl-5,5-diphenylbarbituric acid, N-methoxymethyl ethosuximide, and N-methoxymethyl glutethimide, and a method comprising administering them to a patient.

A stabilised composition having antibacterial, antiviral and / or antifungal activity, said composition comprising silver ions and a ligand, characterised in that the composition comprises a complex of silver and a ligand selected from the group consisting of 5,5-disubstituted hydantoins in which the substituents do not comprise conjugated unsaturated bonds and barbituric acid and derivatives thereof stabilising silver ions against reduction to free silver in a hydrophilic environment, and that the composition has a solubility in water higher than 10 mg Ag / l is stable during sterilisation and retains the activity without giving rise to darkening or discoloration of the dressing during storage.

The invention discloses a ternary polymerization carbon nitride photocatalytic material, which is prepared by taking melamine, cyanuric acid and barbituric acid as raw materials, wherein the mass ratio of the melamine to the cyanuric acid to the barbituric acid is equal to 1 to 1 to (0.1-0.2); the ternary polymerization carbon nitride photocatalytic material has a porous structure. A preparation method comprises of the photocatalytic material comprises the following steps: grinding the melamine, the cyanuric acid and the barbituric acid, then dissolving into a solvent, stirring, and drying to obtain a precursor; calcining the precursor obtained in the step S1, and grinding to obtain the ternary polymerization carbon nitride photocatalytic material. The ternary polymerization carbon nitride photocatalytic material is large in specific surface area and narrow in band gap width and can be used for decomposing organic pollutants when being irradiated by visible light.

The present invention is directed to a gel polymer electrolyte for use in rechargeable polymer secondary batteries and a precursor composition thereof. The precursor composition can be injected into an aluminum shell of a battery cell, which undergoes in-situ heating polymerization by heating and forms a gel polymer electrolyte penetrating a partition membrane therein. The precursor composition contains (meth)acrylic (acrylate) monomers and a modified bismaleimide oligomer resulting from a reaction of barbituric acid and bismaleimide.

A stabilised composition having antibacterial, antiviral and / or antifungal activity, said composition comprising silver ions and a ligand, characterised in that the composition comprises a complex of silver and a ligand selected from the group consisting of 5,5-disubstituted hydantoins in which the substituents do not comprise conjugated unsaturated bonds and barbituric acid and derivatives thereof stabilising silver ions against reduction to free silver in a hydrophilic environment, and that the composition has a solubility in water higher than 10 mg Ag / l is stable during sterilisation and retains the activity without giving rise to darkening or discoloration of the dressing during storage.

The present invention relates to a method for performing a tenderization treatment on yak meat by using a fresh ginger and kiwifruit compounding juice, and a detection method of the yak meat treated by the method, and belongs to the technical field of food processing and detection. The method concretely comprises: 1) respectively and sequentially carrying out cleaning, peeling and block cutting on fresh ginger and fresh kiwifruit, respectively adding equal mass double distilled water, and sequentially carrying out homogenate and filtration, wherein the supernatants are the fresh ginger juice and the kiwifruit juice; 2) taking longest muscle on the back of a yak after slaughter 1-2 h, injecting the fresh ginger juice and kiwifruit juice compounding juice, carrying out vacuum package, and placing in an environment with a temperature of 2-8 DEG C to store for 14-21 days to obtain the tenderized yak meat product. Detection results of various physical and chemical indicators such as pH value, a thiobarbituric acid reactant, Warner-Bratzler shear force, meat color, cooking loss, and oxygen content in metmyoglobin show that: with the treatment method, tenderness of the yak meat can be effectively improved, and lipid oxidation of the yak meat can be effectively inhibited so as to significantly improve eating quality of the yak meat.

The invention discloses a preparation method for a carbon doped carbon nitride film electrode. The preparation method comprises the following steps: S1, preparing carbon doped carbon nitride with melamine, cyanuric acid and barbituric acid as raw materials; and S2, dissolving the carbon doped carbon nitride obtained in the step S1, coating the dissolved carbon doped carbon nitride onto pretreatedtin dioxide transparent conductive glass, and carrying out baking so as to obtain the carbon doped carbon nitride film electrode. The preparation method provided by the invention has the advantages ofsimple process, low cost, etc.

The invention provides a method and a formula for forming a hyper branched polymer. The method comprises the following steps of: adding a bismaleimide and a barbituric acid into a Bronsted base solution, reacting the mixture at 20 to 100 DEG C to form the hyper branched polymer. The formula can be further added with a monomaleimide monomer and / or a bismaleimide monomer to adjust the properties ofthe hyper branched polymer.

The invention relates to a combination containing bismaleimide oligomer and a preparation method thereof. The combination containing bismaleimide oligomer comprises the bismaleimide oligomer accounting for more than 75 percent of the total solid content of the combination, wherein, the combination containing bismaleimide oligomer is obtained from the batch reaction between bismaleimide monomer and barbituric acid.

The invention relates to a detection reagent for fast detecting cyanide in water. The detection reagent comprises a release reagent and a color developing reagent, wherein the release reagent comprises monopotassium phosphate, methylcellulose, lactic acid and acetone mixed solvents and chloramine T, the color developing reagent comprises sodium hydroxide, isonicotinic acid, barbituric acid and methylcellulose, and the release reagent and the color developing reagent are encapsulated in a separated way according to the consumption for each time. The release reagent comprises the preparation steps that: 1, major ingredients and deionized water are mixed and ground into paste; 2, the paste is placed in a vacuum drying box for drying; 3, dried materials are cooled and ground into powder; 4, the lactic acid and acetone mixed solvents are used for preparing 5% chloramine T solution; and 5, the chloramine T solution is added into the prepared powder, the materials are dried in the air, and the powdery release reagent is obtained. The preparation steps of the release reagent refer to the partial steps. The detection reagent disclosed by the invention can be matched with a colorimetric tube and a standard colorimetric card to be used, the carrying is convenient, the detection range is wide, the time is short, and convenience can be provided for the fast detection of the cyanide in water in various sites.

The invention discloses a dual-emission fluorescent probe and a method for simultaneously detecting nitrite ions and Hg<2+>, which belong to the technical field of environmental detection. The fluorescent probe is a compound formed by carbon quantum dots CQDs, Tb<3+> and 3-aminophenylboronic acid in a buffer solution system with the pH value of 7.0 to 8.0. The carbon quantum dots CQDs are preparedfrom a mixed aqueous solution of nicotinic acid and barbituric acid through a hydrothermal reaction. The detection method comprises the steps of quantitatively adding a to-be-detected solution into the buffer solution system for constant volume, and then scanning an emission spectrum of a fluorescence system in a wavelength range of 320 to 650nm by taking 260 to 280nm as an excitation wavelengthof the buffer solution after constant volume; and calculating the concentrations of Hg<2+> and NO2<-> in the to-be-detected solution according to the linear relationship between the fluorescence quenching efficiency at 373 nm and 545 nm and the concentration of a to-be-detected substance. The fluorescent probe provided by the invention not only can realize trace detection of NO2<-> and Hg<2+> in awater sample, but also has better consistency and selectivity in detection results compared with a spectrophotometric method.

An oligomer additive is provided. The oligomer additive is obtained by a reaction of a maleimide, a barbituric acid and a dibenzyl trithiocarbonate. A lithium battery including an anode, a cathode, a separator, an electrolyte solution and a package structure is also provided, wherein the cathode includes the oligomer additive.

The invention relates to an iron-doped modified carbon nitride photocatalyst, and a preparation method and an application thereof. The preparation method for the iron-doped modified carbon nitride photocatalyst comprises the following steps: uniformly dispersing dicyandiamide, barbituric acid and iron salt in water so as to obtain a mixed solution, then drying the mixed solution, and carrying outcalcination so as to obtain the iron-doped modified carbon nitride photocatalyst, wherein the mass ratio of the dicyandiamide to the barbituric acid to the iron salt is (0.1-100): (0.01-10): (0.01-10). According to the invention, the barbituric acid is selected for modification of carbon nitride, a nitrogen vacancy defect is generated in a carbon nitride structure, and transmission of a charge carrier is promoted; iron doped carbon nitride is stronger in absorption of visible light, so photocatalytic activity is further improved. The preparation method provided by the invention has the advantages of simple operation, no need of using an organic solvent, environmental protection, convenience, low requirements for equipment, and facilitation of large-scale production; and the iron-doped modified carbon nitride photocatalyst prepared by using the preparation method provided by the invention has strong photocatalytic activity to high-concentration phenol, and can be directly applied to treatment of industrial wastewater.

The invention discloses an environment-friendly method for preparing pyrano[2,3-d]pyrimidone derivate through catalysis, and belongs to the technical field of ion liquid catalysis.In the preparation reaction, the mole ratio of aromatic aldehyde to barbituric acid to malononitrile is 1:1:1-1.4.The molar weight of an acidic ionic liquid catalyst is 3-5% that of adopted aromatic aldehyde, the volume dose of a 60% ethanol aqueous solution measured by milliliter is 7-9 times molar weight of aromatic aldehyde measured by millimole, backflow reaction time is 10-25 min, the product is cooled to reach room temperature after the reaction is finished, suction filtration is performed, and filter residue is washed with ethyl alcohol and subjected to vacuum drying to obtain the pyrano[2,3-d]pyrimidone derivate.Compared with a preparation method adopting other acidic ionic liquid catalysts, the method has the advantages that the catalyst is biodegradable, the raw material utilization rate is high, the catalysis ability is strong, and the whole preparation process is easy and convenient to operate, and industrial large-scale application is convenient.

The invention provides a preparation method for 5-ethyl-5-phenyl barbituric acid. The method comprises the following steps of: A, adding ethyl acetate into methanol solution of sodium methylate and heating to reflow, then adding a compound diethyl alpha-ethyl-alpha-phenylmalonate, and acting with urea to prepare sodium 5-ethyl-5-phenylbarbiturate; and performing hydrochloric acidification to prepare a rough product of the 5-ethyl-5-phenyl barbituric acid; and B, re-crystallizing the rough product of the 5-ethyl-5-phenyl barbituric acid in ethanol aqueous solution to obtain a finished product of the 5-ethyl-5-phenyl barbituric acid. Compared with the prior art, the preparation method has the advantages of stable process, mild reaction conditions, easiness in control, stable product quality, high yield, easiness and convenience in post-treatment, few three wastes (waste water, waste gas and industrial residues), low production cost and adaptability to industrial production.

The invention relates to an interpenetrated reticular proton exchange membrane and a forming method thereof. The method comprises the following steps of: copolymerizing polymaleimide and barbituric acid to form super-branched macromolecules; replacing the solvent of a sulfonated tetrafluoethyl copolymer aqueous solution into dimethyl ethylamine; adding 10-20 parts by weight of the super-branched macromolecules to 90-80 parts by weight of the sulfonated tetrafluoethyl copolymer aqueous solution, standing still and heating up to 50 DEG C to ensure that the super-branched macromolecules and the sulfonated tetrafluoethyl copolymers are mutually penetrated; and coating the heated solution onto a substrate, drying and then carrying out pretreatment to remove the dimethyl ethylamine so as to form an interpenetrated reticular proton exchange membrane. The invention also relates to a proton exchange membrane fuel cell using the interpenetrated reticular proton exchange membrane.

Disclosed is a gel electrolyte for a photosensitive dye and method for manufacturing the same. First, bismaleimide and barbituric acid are dissolved in Brönsted base solution to form a gelling additive. Subsequently, the gelling additive is added into an ionic liquid electrolyte. The liquid electrolyte is then gelled at room temperature to form a gel electrolyte for the photosensitive dye utilized in dye sensitized solar cells. In addition, barbituric acid is further added into the gelling additive to enhance the gelling rate of the ionic liquid electrolyte.