253 results about "Xanthonoid" patented technology

The invention discloses a method for extracting and purifying flavone in litsea coreana through an ultrasonic-assisted eutectic solvent, and belongs to the technical field of green processing of natural products. The invention provides a method for efficiently preparing litsea coreana flavone by integrating computer prediction, green solvent extraction and resin purification technologies. The method comprises the following steps: firstly, calculating and screening a deep eutectic solvent system with the highest affinity with the litsea coreana flavone on the basis of a COSMO-RS theoretical model, then coupling the optimized DES with an ultrasonic-assisted extraction (UAE) technology, and through the synergistic effect of the DES and the UAE technology, remarkably improving the extraction rate of the litsea coreana flavone and furthest keeping the biological activity of a target component; then, a macroporous resin dynamic adsorption-desorption purification process is linked, so that high-selectivity enrichment and impurity removal of the flavonoid compounds in the crude extract are realized, a high-purity product is obtained, and a complete process route from intelligent screening, efficient extraction to precise purification is finally formed.

The invention belongs to the technical field of hair care products, and particularly relates to composite acid gel for scalp care and a preparation method thereof. Salicylic acid, glycolic acid, piroctone azelate olamine salt, echinacea purpurea-lactic acid bacteria yeast, an emulsifier and water are combined, wherein the echinacea purpurea-lactic acid bacteria yeast is prepared by performing enzymolysis on echinacea purpurea through bacillus subtilis protease and then performing aerobic fermentation with lactic acid bacteria. Salicylic acid, glycolic acid and azelaic acid in the composite acid gel are compounded, so that stimulation of salicylic acid is weakened, and the effect of dissolving hair follicle grease is reserved; glycolic acid and azelaic acid are added to accelerate keratin metabolism, regulate sebum secretion and create safe and healthy shielding for the scalp environment, and polysaccharide and flavonoid compounds in the echinacea purpurea-lactic acid bacteria leavening are beneficial to exerting the anti-oxidation and immune regulation effects of the echinacea purpurea-lactic acid bacteria leavening. Therefore, the composite acid gel provided by the invention is green, safe and non-irritant, the preparation method is simple and convenient, and the composite acid gel can be used for inhibiting bacteria and reducing scalp inflammation.

The application discloses a galactosyltransferase mutant and application thereof in preparation of flavonoid compounds, and belongs to the technical field of enzymology. The application provides a UDP-galactosyltransferase mutant, which is obtained by site-directed mutation of one amino acid in the amino acid sequence of wild-type galactosyltransferase VcUFGT into alanine (A). The effects of a series of mutants H82A, V139A, G141A, P186A, N245A, V282A and S307A are verified in the examples, the mutants can perform enzyme catalysis reaction with quercetin and UDP-galactoside as substrates, and generate flavonoid compound hyperoside, and the specific enzyme activity of the mutants is more than 1.5 times that of the wild type, thereby providing an effective application basis for biosynthesis of flavonoid compounds.

The invention belongs to the field of natural product extraction, and relates to a method for extracting and separating flavonoid compounds from Artemisia chrysantha, which comprises the following steps: carrying out reflux extraction on the dry overground part of Artemisia chrysantha by using 70% ethanol, loading to a balanced D101 macroporous adsorption resin column, sequentially eluting by using water, a 20% ethanol aqueous solution, a 50% ethanol aqueous solution and a 70% ethanol aqueous solution, and collecting the eluent. Four fractions from Fr. I to Fr. IV are obtained; respectively carrying out polyamide column chromatography separation on Fr.II to Fr.IV, and sequentially eluting with a 20% ethanol aqueous solution, a 50% ethanol aqueous solution and a 70% ethanol aqueous solution to respectively obtain three fractions; and further purifying the Fr.II-1, the Fr.II-2, the Fr.III-1, the Fr.III-2, the Fr.III-1 and the Fr.III-3 by virtue of a Sephadex LH-20 column, so as to finally obtain seven flavonoid compounds. According to the method, only the ethanol water low-toxicity solvent is used for extraction and preparation, organic solvents with high toxicity are not used, the method is green and environment-friendly, the extraction efficiency is high, the number of extracted compounds is large, chemical components of the artemisia europaea medicinal material are enriched, the resource source of active components is widened, and a foundation is laid for follow-up research.

The invention discloses a method for synergistically extracting flavonoid compounds in epimedium wushanense by combining a ternary eutectic solvent with in-situ ultrasound, which is characterized in that choline bitartrate-urea-glycerol (Chb: Ure: Gly) is used as the ternary eutectic solvent, and the flavonoid compounds in epimedium wushanense are synergistically extracted by the in-situ ultrasound. The method is high in extraction speed and good in repeatability, solvent consumption can be reduced, operation steps are simplified, and efficiency is improved.

The invention belongs to the technical field of biosynthesis of plant secondary metabolites, and particularly relates to a key gene for biosynthesis of large-fruit hawthorn flavonoid compounds and a screening method and application of the key gene. Through combined analysis of metabolome and transcriptome, a key gene combination containing seven structural genes and three transcription factor genes is screened out; the expression of the genes is remarkably positively correlated with the accumulation of a target flavone metabolite [6]-gingerol, and the genes are core factors for regulating and controlling the synthesis of the flavonoid compounds of the big-fruit hawthorns through experimental verification. According to the invention, the key gene for regulating and controlling the synthesis of flavone substances such as [6]-gingerol in the big hawthorn fruit is systematically identified for the first time, and a target spot is provided for analyzing a quality formation mechanism from a molecular level; the gene can be used for molecular marker-assisted breeding so as to cultivate a new variety of large-fruit hawthorn with high flavone content, and also can provide gene resources and technical support for the development of functional food and health care products.

The invention discloses an extraction method of rose flavonoids, which comprises the following steps: S1, crushing selected dry Hetian rose buds, and storing for later use; s2, accurately weighing 1g of rose powder and putting the rose powder into a conical flask; s3, then, according to the material-liquid ratio of 1: 40, 40% ethanol is used as a solvent, and the materials are poured into a conical flask to be mixed; and S4, finally, soaking in a constant-temperature water area, extracting for 2 hours, and finally, taking supernate for later use. According to the invention, the solid-liquid ratio of 1: 40 ensures that the rose powder is fully infiltrated by an enough solvent (40% ethanol). Under the proportion, the ethanol can be in full contact with target components (such as flavonoid compounds and the like) in the rose powder. Each 1g of rose powder is surrounded by 40ml of solvent, so that target components have more opportunities to be dissolved out of powder particles to enter the solvent, and the extraction completeness can be improved compared with the condition that a feed liquid is relatively small.

The invention relates to the technical field of biological medicine, in particular to anti-acne hydrogel and a preparation method thereof. The anti-acne hydrogel is prepared from metal-polyphenol network nanoparticles and a hydrogel base material, the metal-polyphenol network nanoparticles comprise a first polyphenol compound, a second polyphenol compound and metal ions, the first polyphenol compound is a tannic acid compound, and the second polyphenol compound is a flavonoid compound; the hydrogel base material comprises a hydrophilic high-molecular polymer and a cationic polymer. The metal-polyphenol network nano-particles are creatively utilized, the anti-inflammatory and anti-oxidation activity of flavonoid compounds, the convergence and protein binding characteristic of tannin and the antibacterial activity of metal ions are integrated at the same time, and the vicious circle of acne can be intervened at the same time from multiple links of antibacterial, anti-inflammatory, anti-oxidation and keratinization adjustment; and the defect of single action target spot of the existing medicine is overcome.

The invention belongs to the technical field of active substance extraction, and discloses a method for extracting boxthorn leaf total flavonoids through an ultrasonic-assisted deep-eutectic solvent and application of the boxthorn leaf total flavonoids. Heating and mixing the hydrogen bond acceptor and the hydrogen bond donor, stirring to be transparent, and adding water to reduce viscosity to obtain the eutectic solvent; mixing the boxthorn leaf powder with a deep-eutectic solvent, performing ultrasonic extraction and centrifugation, and collecting supernate; adsorbing by using macroporous resin, washing and desorbing to obtain an eluent; and performing vacuum freeze drying to constant weight. According to the method disclosed by the invention, the eutectic solvent with low melting point and strong solubility is selected, the flavonoid compounds in the boxthorn leaves are green and efficiently extracted, and the total flavonoid content of the boxthorn leaves obtained by taking the eutectic solvent as an extraction solvent is 123.94 + / -1.04 mg / g and is far higher than the total flavonoid content of the boxthorn leaves obtained by traditional ethanol extraction by 64.60 + / -0.87 mg / g; the method is good in safety, short in time consumption and high in extraction rate.

The application discloses a flavonoid compound in eaglewood as well as a preparation method and application of the flavonoid compound, and relates to the technical field of medicines. The application extracts and separates a new compound from natural eaglewood, and the new compound is used in the preparation of anti-osteoporosis drugs. The compound is detected in vitro to obtain an induction effect of the compound on the differentiation of bone marrow mesenchymal stem cells (BMSCs) into osteoblasts, so as to affect the formation of osteoclasts. Meanwhile, the compound can promote the bone development of zebra fish through RT-qPCR detection, which indicates that the compound has anti-osteoporosis activity. The separation method of the compound is simple and easy to operate.

The invention discloses a method for predicting liquid chromatography retention time of traditional Chinese medicine active ingredients. The method comprises the following steps: detecting retention time of flavonoid compounds or anthraquinone compounds under different chromatographic conditions through a reverse high performance liquid chromatograph; performing structure optimization on the flavonoid compound or the anthraquinone compound; performing molecular descriptor calculation on the optimized compound structure to obtain a molecular descriptor data set; performing genetic algorithm screening on the molecular descriptor data set to obtain characteristic molecular descriptors; combining the characteristic molecule descriptors with the different chromatographic conditions into a complete data set; the complete data set serves as an input variable, retention time serves as an output variable, and a gradient elevator GB algorithm or a random forest method RF is adopted for modeling to obtain a QSRR model; and predicting the retention time of flavonoid or anthraquinone compounds under different chromatographic conditions by using the constructed QSRR model.

The application discloses a preparation method of a high-activity multi-level-pore boronic acid imprinting hydrogel microsphere adsorbent and application of the adsorbent to selective adsorption of a flavonoid compound naringin (NRG). The application enhances surface functionalization of COFs by dopamine modification, prepares thiol functionalized covalent organic framework microspheres, synthesizes thiol microspheres by using an emulsion interfacial polymerization method, prepares COFs boron affinity imprinting microsphere adsorbents based on boron affinity, and applies the adsorbents to selective adsorption of NRG in agricultural wastewater. The prepared adsorbent has a significant multi-layer adsorption effect, and the adsorption capacity is significantly improved by using boron affinity. The multi-level-pore structure of the COFs microspheres provides abundant sites for adsorption, and significantly improves the mass transfer rate. In addition, the prepared adsorbent has significant specificity in adsorption and separation of NRG, and provides a promising adsorption material for industrialized separation of NRG.

The invention belongs to the technical field of natural pharmaceutical chemistry, and discloses a flavonoid compound in lomatogonium radiatum as well as a preparation method and application thereof.The flavonoid compound is separated from lomatogonium radiatum of a gentiaceae lomatogonium plant, the medicinal material of lomatogonium radiatum is extracted and concentrated, and the flavonoid compound is obtained. And sequentially carrying out macroporous adsorption resin separation, gel column chromatography separation, medium-low pressure ODS column chromatography separation and semi-preparative high performance liquid chromatography separation. Pharmacological studies show that the compound provided by the invention can effectively inhibit the levels of COX2, IL-6 and TNF-alpha in mouse macrophages RAW246.7 caused by lipopolysaccharide (LPS), which indicates that the compound has obvious anti-inflammatory activity and can be used for preparing anti-inflammatory drugs.

The invention relates to a flavonoid derivative containing a flavonoid that is coupled to an alkylene group via an ether bond, said alkylene group having an adhesion group for adhesion onto a dental surface. The flavonoid derivative has a long-term suppressing effect on the dental disease-causing formation of biofilm on the dental surfaces treated with the flavonoid derivative. The invention further relates to a kit for producing such a flavonoid derivative, and to the use of same.

The application discloses a three-channel fluorescence sensor array based on sulfur quantum dots and a preparation method and detection application thereof. The sensor array is composed of three kinds of sulfur quantum dots, namely C-SQDs, PSS-SQDs and beta-SQDs. When target objects exist, the three kinds of sensing units generate differentiated fluorescence responses, forming a unique "fingerprint map". By using principal component analysis to analyze the response mode, the array can successfully distinguish between structurally similar baicalein, fiscetin, myricetin, quercetin and rutin in a concentration range of 8.0-56 muM. In addition, the array can also perform semi-quantitative analysis on a single flavone compound in a range of 4.0-56 muM, and the first principal component has a good linear relationship with the logarithm of the concentration of the target object.

The present disclosure relates to non-therapeutic uses of compounds or combinations thereof to increase cognitive performance, alertness and / or energy levels of a human or animal, as well as an oral product comprising said compounds or combinations thereof.

The invention provides a method for extracting and purifying flavonoid compounds in sophora flower buds through a solvent-free subcritical water one-pot method, and belongs to the field of green extraction technologies and natural product processing. Firstly, raw material enzyme treatment is carried out, sophora flower buds are put into a sealed stirring reactor; adding an acetic acid buffer solution with the pH value of 4.4-5.0 and the concentration of 0.07-0.15 M, and adding ascorbic acid as an antioxidant; introducing nitrogen to establish an inert atmosphere; adding an enzyme preparation; performing incubation; then carrying out subcritical water extraction to obtain a flavonoid compound crude product; and finally, crystallizing and purifying to obtain a flavonoid compound finished product. According to the method, an organic solvent is not needed, extraction and purification are integrated, rutin or quercetin is selectively produced through simple parameter regulation and control, the production process is green and environmentally friendly, the yield and purity of flavonoid compounds are improved, the processing time is shortened, and the production cost is reduced.

This invention belongs to the field of traditional Chinese medicine treatment, specifically relating to an anti-cold and detoxifying capsule pharmaceutical composition, its preparation method, and its application. The composition comprises the following components in parts by weight: 25-35 parts Angelica dahurica, 40-50 parts Scutellaria baicalensis, 2-5 parts flavonoids, 0.5-2 parts Imperatorin, 1-5 parts Artemisia capillaris, 1-5 parts phloroglucinol compounds, and 0.1-0.5 parts organic acids. The component-based composition provided by this invention has a good effect in preventing and treating wind-heat colds, and the components exhibit good synergistic effects.

The present application relates to natural bacteriostatic active substance technical field, especially to flavonoids and its preparation method and application. The preparation method of the above-mentioned flavonoids comprises: after the gold cholla is removed thorn, freeze-drying and grinding, the gold cholla powder is obtained; the gold cholla powder is subjected to ultrasonic alcohol extraction and organic membrane filtration in sequence, and the extract mother liquor is obtained; the mother liquor is separated and purified, and the flavonoids are obtained. The present application determines the structure of the bacteriostatic effective component in the gold cholla extract, and correspondingly provides a preparation method of the flavonoids, thereby improving the biological activity and application value of the extract, ensuring the consistency and repeatability of the extract, and providing a high-efficiency and stable natural active substance for the antibacterial field.

This disclosure relates to a method for quantitatively detecting active ingredients in Ophiopogon japonicus and its application. The method includes: S1, placing the Ophiopogon japonicus to be tested in an extract, shaking, sonicating, centrifuging, and then mixing with an internal standard to obtain a test solution; S2, using liquid chromatography-mass spectrometry to detect the content of active ingredients in the test solution; the active ingredients include flavonoids and saponins. This method can simultaneously and rapidly quantitatively analyze multiple active substances in Ophiopogon japonicus, including steroidal saponins with different physicochemical properties, high levels of isoflavones, and ketones, which is of great significance for evaluating the quality level of Ophiopogon japonicus.

A method for detecting natural flavonoid selenium, including the following steps: S1: preparing mobile phase; S2: preparing test solution; S3: testing the test solution, the present disclosure is applicable to the field of pharmaceutical technology and provides the detection method for natural flavonoid selenium to ensure direct quantification of a quality control in drug development and application. Through a standard curve, a compensation effect of a dual ternary pump can be utilized to render a response value of each substance passing through a detector correspond to an amount of substance, without being affected by the fluidity gradient and without the need to prepare standard samples again.

The application provides a gold nanoflower enhanced flavonoid compound and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing chloroauric acid, ascorbic acid, a protective agent and water to obtain a gold nanoflower solution; (2) mixing the gold nanoflower solution obtained in the step (1) with a flavonoid compound solution to obtain a gold nanoflower-flavonoid compound complex solution; and (3) mixing the gold nanoflower-flavonoid compound complex solution obtained in the step (2) with a biotin-PEG-SH solution to obtain the gold nanoflower enhanced flavonoid compound. The gold nanoflower enhanced flavonoid compound provided by the application effectively enhances the fluorescence intensity of a flavonoid traditional Chinese medicine small molecule at a tumor site, provides a more accurate and clear tumor image, and has the advantages of good targeting effect.

The invention relates to the technical field of functional food, in particular to a tartary buckwheat and roxburgh rose composition for regulating blood pressure and blood fat and a preparation method thereof. The tartary buckwheat and roxburgh rose composition comprises tartary buckwheat and roxburgh rose. The mass ratio of the tartary buckwheat to the roxburgh rose is 1: (1-3). In-vitro activity evaluation, cell experiments and animal experiments prove that flavonoid compounds of tartary buckwheat and active ingredients such as vitamin C of roxburgh rose in the composition generate a synergistic effect, so that the antioxidant capacity, the ACE inhibition rate, the cholesterol clearance rate and the pancreatic lipase inhibition rate can be remarkably improved, NO generation is effectively promoted, and the curative effect is good. The contents of TC, TG and LDL-L are reduced, the HDL-L level is increased, and the balance of vascular active substances is regulated. The raw materials are all medicinal and edible, are high in safety and free of side effects, provide a natural and efficient auxiliary conditioning scheme for chronic metabolic diseases such as hypertension and hyperlipidemia, and have a good industrialization prospect.

This invention discloses an isoflavone compound, its preparation method, and its applications. The compounds are derived by directional esterification modification of all phenolic hydroxyl groups with allyloxycarbonyl chloride, o-chlorobenzoyl chloride, or cinnamoyl chloride, using 4',7-dihydroxyisoflavone or 4',5,7-trihydroxyisoflavone as the parent nucleus. The invention also provides a mild and efficient preparation method for these compounds and confirms their significant anti-inflammatory pharmacological activity. Pharmacological studies show that compounds B and E, in particular, exhibit excellent in vitro and in vivo anti-inflammatory activity, with compound E showing superior activity compared to the positive control drug dexamethasone. These compounds can be used to prepare drugs for treating inflammatory diseases such as pneumonia and colitis.

The inventors have found that quercetin and genistein, individually, suppress the expression of some aging-related genes while promoting the expression of other aging-related genes. Therefore, the main objective was to maintain the repressive effect on some aging-related genes that quercetin, genistein, and their glycosides may have, while suppressing the effect of promoting the expression of other aging-related genes. [Solution] The above problem can be solved by combining two or three components selected from the group consisting of component (i): quercetin and / or its glycosides, component (ii): genistein and / or its glycosides, and component (iii): nobiletin and / or its glycosides.

The invention relates to the technical field of traditional Chinese medicines, and discloses a classic prescription for treating hypoovarian reserve function, which is prepared from the following raw materials: 30 to 40g of Chinese yam, 20 to 30g of semen cuscutae, 10 to 20g of fructus lycii, 10 to 15g of radix achyranthis bidentatae, 10 to 20g of codonopsis pilosula, 10 to 20g of poria cocos, 20 to 30g of malt, 10 to 15g of angelica sinensis and 10 to 30g of radix puerariae. The classical prescription for treating the hypoovarian reserve function has a positive curative effect, and modern network pharmacology also scientifically proves that active ingredients such as quercetin, daidzein, kaempferol and the like contained in the kidney-tonifying and menstruation-regulating prescription are flavonoid compounds from the aspect of action mechanism, so that the prescription has very good anti-inflammatory and anti-oxidative stress ovarian protection effects; the application range is wide, clinical manifestations of patients with the ovarian reserve function decline are generally hypomenorrhea, menoxenia, amenorrhea, infertility or perimenopausal symptoms, and the kidney tonifying and menstruation regulating prescription has a certain regulating effect on the hypomenorrhea.

The invention discloses a pharmaceutical composition for resisting non-small cell lung cancer as well as a preparation method and application of the pharmaceutical composition, belongs to the technical field of antitumor drugs, and mainly solves the technical problem that application is affected due to the fact that an Iridobelamal A compound has high toxicity to normal lung cells. The composition provided by the invention comprises the following active components: an iridoaldehyde triterpenoid compound Iridobelamal A and a flavonoid compound tectorigenin, the molar ratio of the Iridobelamal A to the tectorigenin is 1: 2-1: 5, the molecular formula of the Iridobelamal A is C30H50O4, the molecular formula of the tectorigenin is C16H12O6, and the composition and a pharmaceutical carrier are prepared into an oral preparation or an injection. The composition is used for preparing a medicine for treating non-small cell lung cancer by neutralizing triterpene toxicity and synergistically enhancing anti-tumor activity.

The invention relates to the technical field of biological medicine, and discloses a non-treatment auxiliary method for improving the application effect of an Angnan active substance, and the method comprises the following steps: carrying out meridian detoxification operation on a user; after the meridian detoxification operation is completed, applying an Angnan active substance; wherein the meridian toxin expelling operation comprises the steps of acupoint opening liquid medicine application, acupoint pot fixing and acupoint sealing application; the Cuinan active substance comprises a chromone compound, a sesquiterpenoids compound, a flavonoid compound and a volatile oil component, and the sesquiterpenoids compound comprises a beta-dihydroagarofuran type compound. According to the invention, main and collateral channels are firstly detoxified, so that garbage and toxins in the body can be removed, the main and collateral channels are cut through, qi and blood are regulated, the internal environment of the human body is improved, and good conditions are created for absorption and action of active substances in Cuinan.

Disclosed are compositions and / or methods of use of the compositions for patients with neuronal diseases such as AD, Parkinson's, Huntington's, multiple sclerosis, and ALS. In certain embodiments flavonoids alone, or in a pharmaceutical preparation, are administered through the nasal olfactory route. In certain embodiments the flavonoid is apigenin and the neural disease is Alzheimer's. In some embodiments a porosome complex is administered for reconstitution into a neural cell. In certain embodiments, a co-administered blood-brain barrier traversing peptide is configured as a mimic of a domain of ATP 1 A3 and / or Tubulin.

The invention relates to a process for producing microparticles loaded with at least one flavonoid and / or flavonoid derivative, comprising the following successive steps: a) Mixing a water component in the form of an aqueous solution comprising the at least one flavonoid and / or flavonoid derivative with an oil component to form a solution of polylactide-co-glycolide in an organic solvent, to form a water-oil emulsion; b) Mixing the water-oil emulsion from step a) with another water component in the form of an aqueous solution comprising at least one stabilizer, to form a water-oil-water emulsion, c) Mixing the water-oil-water emulsion with an aqueous salt solution; d) Removal of the organic solvent in the water-oil-water emulsion to form a suspension comprising the microparticles loaded with at least the flavonoid and / or flavonoid derivative; e) Separating the loaded microparticles from the liquid of the suspension. Furthermore, the invention relates to microparticles, the use of which for the manufacture of a medicinal product, a dispersion containing the microparticles for use in the treatment and / or prophylaxis of oral infections, as well as non-medical use in cosmetics.