196 results about "Aleuritic acid" patented technology

An aqueous cosmetic composition containing uric acid in a stably solubilized state together with an acrylic polymer is disclosed. The composition is adjusted to pH equal to or higher than pK1 of uric acid, in particular, pH 7 or higher by an alkali to solubilize uric acid. A method for stably solubilizing uric acid in an aqueous cosmetic composition is also disclosed.

The invention discloses a preparation method of citrate modified NaYF4:Yb,Er/Mn up-conversion luminescent nano material, a hydrogen peroxide or uric acid detection method and applications. The preparation method comprises the following steps: 1) stirring alkali, water, oleic acid, C1-C3 alcohol, a manganese source, a ytterbium source a yttrium source, an erbium source and NaF, and then carrying out hydrothermal reaction and centrifugal separation to obtain OA-NaYF4:Yb,Er/Mn UCNPs; and 2) dispersing OA-NaYF4:Yb, Er/Mn UCNPs in alcohol, and then carrying out ligand exchange reaction with a trichloromethane and citrate solution to obtain the citrate modified NaYF4:Yb,Er/Mn up-conversion luminescent nano material. The citrate modified NaYF4:Yb,Er/Mn up-conversion luminescent nano material has the advantages of low detection limit, high sensitivity and good selectivity to hydrogen peroxide or uric acid detection, so that the material can be used for detecting uric acid in serum.

The production process of chlorinated isocyanuric acid is characterized by that it makes the chlorine gas pass through solid carbonate or solid bicarbonate powder to obtain mixed gas, and introduces the mixed gas into suspensoid of cyanuric acid or monosodium cyanurate to make reaction and obtain symclosene or sodium dichloroisocyanurate. Said ivnented process can produce pure chloride-free chlorinated isocyanuric acid, its product colour is good, and the residuum produced after reaction of carbonate or bicarbonate and chlorine gas is another product.

The invention discloses a preparation method for 1, 3, 7, 9-tetramethyluric acid, which relates to a preparation method for purine biology alkalies compound in the chemical field. Specifically, fruits of Camellia assamica var.kucha are used as raw materials, water is used for extraction, and the extracting solution is extracted from chloroform or dichloromethane; after the chloroform or dichloromethane is recycled, the ethanol solution with a volume percentage concentration of 50 to 100 percent or methanol is used as a solvent to be re-crystallized, and the 1, 3, 7, 9-tetramethyluric acid with 99 percent purity can be obtained. The preparation method for the 1, 3, 7, 9-tetramethyluric acid has the beneficial effects: 1. the preparation method has the advantage of waste utilization; 2. the preparation method with the advantages of simple technological process, little solvent usage, economy and time saving can realize industrialized production; 3. the product is high in purity and high in yield.

The invention discloses a preparation method of a ferrocenyl carbon nanotube composite material and application thereof and belongs to the technical field of synthesis of inorganic materials. The preparation method of the composite material comprises the following steps: firstly carrying out oxidization and amination on carbon nanotubes and carrying out acylation on ferrocenecarboxylic acid, then taking triethylamine as an acid-binding agent in a dichloromethane solvent, and enabling the carbon nanotubes subjected to amination to react with activated ferrocenylformyl chloride to prepare the composite material. The preparation method of the composit material is simple and is mild in reaction condition; the product is convenient to separate and purify and stable in structure. The composite material takes the carbon nanotubes with large specific surface area and high conductivity as support materials; ferrocenyl derivatives which can be used as electron media and provided with excellent electrochemical reversibility are covalently coupled on the surfaces of the carbon nanotubes, so that the composite material is excellent in effect of redox reaction for electrochemically catalyzing dopamine; the common interference matters including ascorbic acid and uric acid have no interference on detection of dopamine; the composite material is wide in linear response range and high in sensitivity and repeatability for detection of dopamine.

The invention relates to a palladium nanoparticle/carbon nanofiber compound, a preparation method and an application thereof in electrocatalysis. The compound is directly prepared by a one-step electrospinning method. An electrode modified by the compound is used for direct eectrochemical detection on hydrogen peroxide, beta-nicotinamide adenine dinucleotide, dopamine, ascorbic acid and lithic acid. The electrode modified by the compound has the linear range from 0.2 micrometer to 20 millimetres and the detection limit of 0.2 micrometer when being used for the detection on the hydrogen peroxide and has the linear range of 0.2-716.6 micrometers and the detection limit of 0.2 micrometer when being used for the detection on the beta- nicotinamide adenine dinucleotide; and the peak-peak potential differences between the ascorbic acid and the dopamine, the dopamine and the lithic acid as well as the ascorbic acid and the lithic acid are respectively 244mV, 148 mV and 392 mV, thereby showingthat the modified electrode can be used for simultaneous eectrochemical detection of three substances. The compound can be used in the fields of catalysis, fuel cells and sensing.

The present invention provides a new application of Fraxinus general counmarin and aesculetin as the extractives of Chinese medicine material cortex Fraxini. The said two has obvious effects of stopping pain, resisting inflammation and reducing blood uric acid. They has obvious curative effect on acute and chronic gout and no obvious toxic side-effect. The present invention also provides a simple preparation process of Fraxinus general coumarin, and that is a Fraxinus general coumarin concentrating and purifying process.

Provided is a method for obtaining a lactic acid bacterium having a property of reducing a serum uric acid level. The present invention relates to: a method for screening for a lactic acid bacterium, which comprises determining the amount of a purine body incorporated in each of lactic acid bacteria in a culture medium containing the purine body and then screening for a lactic acid bacterium having a property of trapping the purine body among the lactic acid bacteria employing the amount as a measure; and a purine body trapping agent for reducing a serum uric acid level, which comprises a lactic acid bacterium obtained by the method.

The invention relates to a composition for reducing uric acid and application thereof. Ocean fish oligopeptide powder, moringa oleifera leaf powder, acerola cherry concentrates and green plum extract are used as raw materials and matched with various edible auxiliary materials to prepare the composition. The composition is prepared from, by weight, 5-35% of ocean fish oligopeptide powder, 5-45% of moringa oleifera leaf powder, 2-15% of acerola cherry concentrates, 5-30% of green plum extract and the balance edible auxiliary materials. The food raw materials are selected and synergistically take effects by means of scientific compatibility, so that the composition is high in uric acid reducing speed, remarkable in effect, safe and free from side effects.

The invention discloses a konjac flour-containing mixture and a preparation method thereof. The konjac flour-containing mixture is prepared from the following components in percentage by weight: 20-40% of konjac flour, 10-20% of celery powder, 2-8% of hawthorn fruit powder and 40-60% of giant salamander powder. The preparation method comprises the following steps: sequentially carrying out quick-freezing, drying and crushing on celeries, and grinding into ultra micro fine powder with a size of more than 200 meshes; processing and crushing hawthorn fruits by using the conventional drug preparation method, and grinding into ultra micro fine powder with a size of more than 200 meshes; defatting living giant salamanders, removing the lungs and intestinal canals of the living giant salamanders, carrying out vacuum freeze-drying, and crushing and grinding into nano fine powder; and finally, mixing the three kinds of powder with konjac fine flour sold in the market according to the ratio above so as to obtain the konjac flour-containing mixture which is a nutrient health-care product. The konjac flour-containing mixture disclosed by the invention has the effects of tonifying the spleen, promoting appetite, relaxing the bowels, losing weight, reducing blood fat and blood sugar, neutralizing uric acid and the like. The preparation method preserves various nutrient components. The commodity type mixture is convenient to eat, and easy to enable people to eat frequently and continuously.

The invention belongs to the field of drugs or health care products, and particularly relates to new application of a polyacetylene compound to lowering of uric acid. The polyacetylene compound has astructure shown in a formula (I): R1 and R2 are defined as in the specification. The new application of the polyacetylene compound to lowering of the uric acid is found through a hyperuricemia animalmodel. The polyacetylene compound has the significant effect on lowering the uric acid in a body, and can be used as a potential drug lowering the uric acid or treating gout.

The invention discloses a building fireproof material that is a fireproof coating; the fireproof coating is prepared from: composite base resin, pentaerythritol, ammonium polyphosphate, calcined kaolin, calcined vermiculite powder, hydroxypropyl methyl cellulose, a leveling agent, sodium fluorosilicate, uric acid, waterglass, borax, potassium sulfate, copper sulfate, a flame retardant and p-phenylenediamine. The building fireproof material is reasonable in formulation, and the prepared coating may effectively attach to the surface of a building material, is good in sun-screening and waterproof effects, rarely fades and has good fireproof effect.

The invention discloses a novel fluorescent probe, its preparation method and its application in detecting uric acid. Take diethylenetriaminepentaacetic acid, acetic anhydride, and pyridine, stir and heat at 65°C for 24 hours, cool, filter, wash, and dry, and the obtained diethylenetriaminepentaacetic dianhydride and triethylamine, DMF, 2,6‑ Diaminopurine, mix well, heat and stir at a constant temperature of 100°C for 24h, cool, filter, and dry, and the obtained diethylenetriaminepentaacetic acid-bis(2,6-diaminopurine) is dissolved in Tris-HCl buffer solution with pH=7.4 , mixed with Tb(NO3)3·6H2O, filtered, and the filtrate was heated or placed for a long time to obtain the target product. TbШ‑dtpa‑bis (2,6‑Diaminopurine) was used as a probe combined with a fluorescent method to detect uric acid. The method of the invention is simple and novel, has high efficiency and low cost, and can be applied in actual urine samples.

The invention discloses a uric acid electrochemical sensor based on an active copper carbon point and an application thereof. The application comprises the following steps: adding a high molecular polymer rich in carboxyl and cupric salt into a reaction container, putting the reaction container in a hydrothermal reaction kettle, performing a reaction for 2-18h at 200-240 DEG C, performing centrifugalization and dialysis and purification to obtain an active copper carbon dot-containing solution; by adopting a three-electrode system, taking a glass carbon electrode as a working electrode, a platinum wire electrode as a counter electrode and a saturated mercurous chloride electrode as a reference electrode, putting the pre-treated glass carbon electrode in the active copper carbon dot-containing solution, and performing scan round at the scanning speed of 50-500mV/s in a potential range of 0-2V by means of an electrodeposition method. Compared with the prior art, the nanomaterial containing the active copper carbon dots not only has a large specific surface area of the carbon dots and a high electron transmission rate, but also a promoting action on the electron transfer rate on a matrix on an electrode interface by active copper and very strong selectivity on uric acid.

The invention discloses a preparation method of a meteng fruit meal bioactivity peptide with a uric acid reducing effect, which comprises the following steps:(1) pretreatment of meteng seed meal: crushing, degreasing, removing an organic reagent, and soaking in water to obtain a meteng seed meal solution;(2) protease enzymolysis: heating to 40-60 DEG C, adjusting pH to 2-11, adding protease for hydrolysis, then inactivating enzyme at high temperature, centrifuging, and taking supernatant to obtain crude enzymolysis solution;(3) fermentation of bacillus lactis DU-106: inoculating the fermentation seed solution to the crude enzymolysis solution of maitenu protein, stirring and mixing uniformly, and fermenting at 25-35 DEG C for 2-7 days;(4) neutralization and filteration: adjusting the pH value of the cooled hydrolysate to be neutral, and filtering to obtain enzymolysis solution; (5) membrane separation: carrying out ultrafiltration membrane filtration, evaporation concentration and freeze drying. According to the invention, protease enzymolysis, lactic acid bacillus DU-106 fermentation and ultrafiltration separation technologies are utilized to prepare the meteng fruit meal bioactive peptide, so that the meteng fruit meal bioactive peptide has an obvious uric acid reducing effect; and the meteng fruit meal is leftovers generated after the meteng fruit is pressed into oil, so that the method has the advantages of simple process, low production cost and no pollution.