12 results about "Astragalin" patented technology

The application relates to a method for hydrothermal acid-controlled degradation of mulberry leaf polysaccharide and antioxidant application thereof, and belongs to the technical field of extraction of active ingredients in natural products. The method comprises the following steps: pretreating raw materials, hydrothermally reacting and acid-catalytically treating mulberry leaves, and alcohol-sedimenting, separating and purifying mulberry leaf polysaccharide, so as to obtain mulberry leaf polysaccharide, finally, the antioxidant application of the mulberry leaf polysaccharide is explored, and a theoretical basis is provided for development of mulberry leaf resources. The method can not only obtain mulberry leaf polysaccharide, but also obtain high-value natural active ingredients such as rutin, astragalin, scopoletin and isoquercitrin in the mulberry leaves, is beneficial to development and utilization of the mulberry leaf resources, meets the needs of people's health, and has practical significance and economic value.

The invention provides a glycosyl transferase gene for catalyzing astragalus smicus glycoside synthesis and application of the glycosyl transferase gene, and belongs to the technical field of biology. The invention develops a novel glycosyl transferase, a novel glycosyl transferase mutant is obtained by utilizing a genetic engineering method, and astragalus smicus glycoside can be synthesized through a microbial fermentation or in-vitro enzyme reaction process. The synthetic route is simpler, the synthetic condition is mild, the environmental pollution is small, the synthetic efficiency is higher, the purity is better, the waste of environmental resources is less, a new synthetic route is provided for the synthesis of the chemical substance, namely, the astragalin with high economic value, and a new thought and method are provided for actual production.

The present application belongs to the field of food science and technology, and particularly relates to a method for separating and purifying walnut male flower polyphenols based on macroporous adsorption resin and application. Research shows that the X-5 type resin has the best performance in adsorbing and desorbing walnut male flower polyphenols, the adsorption process conforms to the Temkin isothermal model and the pseudo-second-order kinetic model, indicating that it is a spontaneous exothermic physical adsorption process. After process optimization (80% ethanol, 2 BV / h flow rate, 10 BV elution volume), the polyphenol content is significantly improved. The purified product detects 26 kinds of phenolic acid compounds and 22 kinds of flavonoids, the main components are astragalin, isquercitrin, protocatechuic acid, gallic acid and quercetin, accounting for 89.91% of the total phenol content. The antioxidant activity of the purified polyphenol extract is significantly enhanced, and it has obvious bacteriostatic effect on Staphylococcus aureus. The present application provides a theoretical basis for the high-value utilization of walnut male flower resources and its application in the fields of food and health care.

The invention discloses a characteristic chromatogram for detecting a Yiyouqing particulate matter basis as well as a construction method and application thereof, and belongs to the field of quality control of traditional Chinese medicine compound preparations. According to the method, hydroxysafflor yellow A, rutin, kaempferol-3-O-rutinoside, astragalus smicus glycoside, flatstem milkvetch glycoside and kaempferol are taken as reference substances, multiple batches of samples of the Yiyouqing granules are analyzed by utilizing a high performance liquid chromatography-mass spectrometry technology, and a chemical component characteristic spectrum is established. Compared with a traditional method, the method has good precision and reproducibility, data are accurate and reliable, the six components can be recognized at the same time under the same chromatographic condition, analysis efficiency is greatly improved, synchronous monitoring of multiple components is achieved, and consistency and stability of preparation quality are guaranteed. The method provides support for improving the quality standard of the Yiyouqing granules, and has important significance on the clinical curative effect and medication safety of the Yiyouqing granules.

The invention provides a thin-layer identification method for flavonoid compounds in humulus lupulus, and belongs to the technical field of traditional Chinese medicine component detection. The thin-layer analysis method for the flavonoid compounds in the humulus lupulus comprises the following steps: adopting a thin-layer chromatography method, taking ethyl acetate, trichloromethane, methanol, water and formic acid in a volume ratio of 7: 2: (0.4-1.2): (0.1-0.9) as a developing solvent, taking a silica gel thin-layer plate as a thin-layer plate, and adopting a color developing agent to identify rutin, isoquercetin and astragalin in the humulus lupulus. According to the present invention, the rapid separation and the qualitative analysis of the rutin, the isoquercetin and the astragalus smicus glycoside in the humulus lupulus are achieved, the separation degree of the rutin, the isoquercetin and the astragalus smicus glycoside is improved, and the trailing phenomenon of the rutin, the isoquercetin and the astragalus smicus glycoside is reduced.

This invention discloses a method for determining the quality of *Hemiberlesia lingua* stems and leaves. The method includes fingerprint spectroscopy establishment and similarity analysis, content determination, cluster analysis, principal component analysis, and partial least squares discriminant analysis. The method of this invention involves UPLC fingerprint analysis and similarity analysis of 15 batches of *Hemiberlesia lingua* stems and leaves from different origins. A total of 28 common peaks were found, and 7 of these common peaks were identified using reference standards: peak 4 (neochlorogenic acid), peak 8 (chlorogenic acid), peak 9 (caffeic acid), peak 11 (cryptochlorogenic acid), peak 22 (isoquercetin), peak 24 (astragalin), and peak 28 (isochlorogenic acid C). This invention's method is highly sensitive, specific, stable, and feasible, providing a reference for the quality evaluation and control of *Hemiberlesia lingua* stems and leaves.

The invention discloses a thin-layer chromatography detection method, quality control and evaluation of pogonatherum crinitum. The thin-layer chromatography detection method comprises the following steps: providing a pogonatherum crinitum test solution; respectively providing reference substance solutions of hyperoside, quercetin, astragalus smicus glycoside and kaempferol; and dripping the test solution and the reference solution on the same thin layer chromatography plate, developing by using a mixed solution of trichloromethane, methanol and formic acid in a volume ratio of (8-12): (1-2.2): (1-2.2) as a developing solvent, taking out, airing, developing, and inspecting. According to the method, rapid separation and identification of hyperoside, quercetin, astragalin and kaempferol in the pogonatherum crinitum are achieved, thin-layer chromatography spots are clear, the accuracy and comprehensiveness of pogonatherum crinitum quality control are improved, and establishment and overall evaluation of pogonatherum crinitum medicinal material quality standards are facilitated.

The invention relates to a composition comprising Astragalin (K) and Miquélianin (Q) in a K / Q mass ratio of between 1 / 1.5 and 1 / 3.5. The invention also relates to the use of a composition according to the invention, in particular to prevent and / or reduce the virulence of S. aureus, and / or to prevent and / or reduce its uncomfortable and / or unsightly manifestations on healthy skin and / or healthy mucous membranes, and / or to treat skin and / or mucous membrane infections caused by S. aureus.

The application belongs to the technical field of health care products, and specifically discloses a composition for enhancing immunity, a health care food and a preparation method, which comprises the following components in parts by weight: 6-10 parts of ganoderma extract, 10-15 parts of astragalin, 12-18 parts of collagen, 18-22 parts of chitosan oligosaccharide, 19-24 parts of polygonatum extract and 24-28 parts of selenium-rich yeast. The ganoderma extract, the astragalin, the collagen, the chitosan oligosaccharide, the polygonatum extract and the selenium-rich yeast are combined, and the synergistic effect of the ganoderma extract, the astragalin, the collagen, the chitosan oligosaccharide, the polygonatum extract and the selenium-rich yeast is utilized to improve the immunity of the human body from different angles, aspects and all aspects.

The application discloses application of a natural product composition in preparation of medicines for preventing or treating azoospermia. The natural product composition is composed of astragalin and curcumin. The natural product composition composed of astragalin and curcumin can inhibit spermatogenic cell apoptosis by synergistically regulating Nrf2 / HO-1 / HIF-1a, and improve rat azoospermia. Compared with western medicines, the natural product composition has a wider treatment window and smaller toxic side effect, and has application prospects in the medicines for preventing or treating azoospermia.

The application discloses a method for detecting the content of multiple components in persimmon calyx samples and application thereof. The detection method comprises the following steps: taking persimmon calyx sample powder, precisely weighing, adding an extraction solvent, performing extraction, centrifugation, taking supernatant, evaporating to dryness, constant volume, filtration, taking the filtrate, and obtaining a test sample solution; the mixed control sample solution and the test sample solution are respectively injected into an ultra-high performance liquid chromatograph, and the characteristic maps of the control sample solution and the test sample solution are compared; the content of the components in the persimmon calyx sample is calculated by using the regression equation of the sample injection amount and the peak area; the components are hyperoside, isoquercitrin, 2"-O-galloyl hyperoside, astragalin, quercetin or kaempferol. The quality detection means of the persimmon calyx sample provided by the application can simultaneously determine the content of six components, is simple in operation, good in reproducibility and stability, high in accuracy, reliable in recovery rate, and high in detection efficiency, and provides a basis for standardizing the persimmon calyx medicinal material and preparation market and reasonably developing.

The invention discloses a rapid analysis and content determination method for components of an alcohol extract of sedum emarginatum, relates to the technical field of quality control of medicinal materials, and solves the problem that the detection efficiency is low when the contents of various components of sedum emarginatum are determined in the prior art. According to the method, under the same chromatographic condition, six components including schaftoside, isoquercitrin, astragalus smicus glycoside, p-coumaric acid, gallic acid and protocatechuic acid contained in the sedum emarginatum alcohol extract are subjected to high performance liquid chromatography determination at the same time, and the problem that the detection efficiency is low when the content of various components of sedum emarginatum is determined at present is solved. The content of various components such as sedum emarginatum schaftoside, isoquercitrin, astragalus smicus glycoside, p-coumaric acid, gallic acid and protocatechuic acid can be determined under the same high performance liquid chromatography condition, and the determination method is accurate, high in sensitivity, good in repeatability and high in stability.