54 results about "Isoquercitroside" patented technology

A process for preparing a rutin-enriched composition from plant biomass comprises extraction with an aqueous solution, and precipitation. An enzyme preparation, such as naringinase, is used for the transformation of rutin to higher value compositions containing increased proportions of isoquercitrin and quercetin.

The present disclosure generally relates to edible compositions comprising naturally derived food colorants, and more specifically to edible compositions comprising naturally derived food colorants and a stability enhancing isoquercitrin anti-oxidant. A claim is directed to an edible composition comprising from about 0.0005 to about 3 percent by weight of a natural colorant; and from about 0.015 to about 0.15 percent by weight of enzymatically modified isoquercitrin antioxidant. The natural colorant is preferably selected from carotenoid, curcumin, anthocyanins, betanin, gardenia blue, gardenia yellow, chlorophyllins, phycocyanins and combinations thereof.

There are described compositions comprising an effective amount of a combination of two or more components, said components selected from acacetin, ACT1 peptide, alpha-lipolic acid, alprostadil, anisomycin, apigenin, ascorbic acid, astragalus, berberine, beta-lapachone, beta-hydroxy-beta-methyl-butyrate, bacopa monnieri, catechin, catechol, chamomile, chrysin, coumestrol, curcumin, dinitrophenol,dinoprost, ellagic acid, (-)-epigallocatechin gallate, green tea extract, fisetin, genistein, ginsenoside RE, glabridin, 18-alfa-glycyrrhetinic acid, 18-beta-glycyrrhetinic acid, glycyrrhizin, hydroquinone, isoquercitrin (EMIQ), kaempferol, kuromanin, leucine, lithium, luteolin, luteolin, luteolinidin, melatonin, menadione, 1-methylnicotinamide (MNA), methyl salicylate, myricetin, nadide, niacin (vitamin B3), nicotinamide (NAM), nicotinamide mononucleotide (NMN), nicotinamide riboside (NR), nicotinic acid adenine dinucleotide (Na AD), nicotinic acid mononucleotide (Na MN), parsley (petroselinium crispum), phenylephrine, pokeweed mitogen, 15-Delta prostaglandin J2, puromycin, quercetin, quinolinic acid, retinoic acid, trichostatin A, troxrutin, rutin, tryptophan, vitamin D3, withaferin A, wortmannin and zinc (including salts thereof).

The invention discloses a method for preparing hyperin from Dogbane leaves, which comprises the following steps: firstly. determining the optimum extraction temperature, a separation material and the concentration of an eluting agent; secondly, regulating the pH value, and extracting with a solvent having high hyperin dissolving and extracting power, thus obtaining a liquid extract; thirdly, heating at 80-85 DEG C under reflux of ethanol or methanol, and extracting; and finally, standing and crystallizing at a preferable cooling temperature, thus effectively separating the hyperin and isoquercitrin which are two flavonoid glycoside components having similar properties. In the invention, the hyperin is further purified by preparing a liquid phase; and a moving phase is examined and determined by methodology, and is subjected to targeted and efficient separation and purification based on the absorption wavelength of the hyperin, thus obtaining the hyperin having purity up to 90-99%. Thehyperin conforms to the requirements for Class A active pharmaceutical ingredients.

The invention relates to application of an alpha-L-rhamnoside enzyme in the directional synthesis of isoquercitrin by the biological conversion of rutin. Because the crude enzyme preparation or the immobilized enzyme preparation of the alpha-L-rhamnoside enzyme is used for catalyzing and hydrolyzing the rutin and directionally and biologically synthesizing the isoquercitrin, the application has the advantages of wide source, easy preparation and low cost of catalysts, high stability, and high catalysis efficiency and specificity of the enzyme preparation, and is easy to store. Thus, the alpha-L-rhamnoside enzyme can greatly reduce the production cost of quercetin, the catalysis and conversion rate of the enzymes is high, and the products are single.

The present invention provides a method for producing isoquercitrin, α-glycosylisoquercitrin, and rhamnose, the method comprising a step of naringin-degrading enzyme treatment during the isoquercitrin production from rutin in the presence of an edible component, such as gelatin, wheat gluten, chitosan, lecithin, a glycerol fatty acid ester, xanthan gum, carrageenan, sodium chondroitin sulfate, casein, enzymatically decomposed gelatin, sodium alginate, konjac extract, gellan gum, guar gum, soybean protein, agar, pectin, yeast extract, egg-white peptide, cluster dextrin, gum arabic, arginine, sodium metaphosphate, karaya gum, locust bean gum, sodium pyrophosphate, glucosamine, chitin, sodium glutamate, dextrin, trehalose, or a grain-based food ingredients. According to the present invention, isoquercitrin and α-glycosylisoquercitrin, which are of use as antioxidants, anti-fading agents, flavor change inhibitors, etc., can be produced in enhanced yields.

The invention discloses an HPLC method for determining the content of 6 components of Mango Zhike Tablets by one measurement and multiple evaluations. The invention adopts the HPLC method, and the chromatographic column is a Phenomenex Gemini C18 column (4.6 mm×250 mm, 5 μm); the mobile phase is acetonitrile ( B)-0.1% phosphoric acid aqueous solution (A); gradient elution; flow rate 1.0mL / min; detection wavelength: 258nm, column temperature 30°C; one-measurement-multiple-evaluation method takes gallic acid as the internal reference, and establishes protocatechuic acid, protocatechuic acid, The relative correction factor (RCF) of mangiferin, homomangiferin, hypericin and isoquercitrin is calculated by RCF, and its measured value is compared and analyzed with the measured result of external standard method. There is no significant difference between the measurement results of the test-multi-assessment method and the external standard method (P>0.05), and the relative correction factors have good repeatability. The high-performance liquid chromatography content determination and one-test-multi-assessment method established in the present invention can be used for Mango Zhike Tablets The content determination of the six components in the method is accurate and reliable, and the repeatability is good, which can be used for the quality control of mango cough tablets.

The invention relates to the technical field of traditional Chinese medicine, especially to a method for separating rutin, hyperoside, isoquercitrin and quercetin from lotus leaves. The method for separating the rutin, the hyperoside, the isoquercitrin and the quercetin from the lotus leaf comprises separating components in the lotus leaves powder by using a column chromatography method for a gradient elution for 65 to 75 minutes with a flow rate of 0.6 to 0.8 ml / min under a temperature of 28 to 32 DEG C and a pH value of 3.5 to 4.5, wherein a stationary phase of the column chromatography is C18, a mobile phase A is a phosphatic buffer with a pH value of 3.5 to 4.5, a mobile phase B is acetonitrile, and the outflow components are successively the rutin, the hyperoside, the isoquercitrin and the quercetin according to a time sequence; respectively recovering eluents containing the rutin, the hyperoside, the isoquercitrin and the quercetin; and finally removing solvents with reduced pressure distillation to obtain the rutin, the hyperoside, the isoquercitrin and the quercetin. The method not only can separate the rutin, the hyperoside, the isoquercitrin and the quercetin, but also is high is separation efficiency.

The invention relates to a method for separating and purifying hyperoside and isoquercitroside from aurea helianthus, belonging to the field of extraction and separation of natural compounds. The method comprises the following steps: heating, refluxing, and extracting flavones in the aurea helianthus; under alkaline condition, forming stable complex precipitate by zinc salt with flavonoids exceptthe hyperoside and isoquercitroside in the aurea helianthus; centrifuging to remove the complex precipitate; and concentrating supernatant, thus obtaining high-purity hyperoside and isoquercitroside.The method provided by the invention can be used for rapidly, efficiently and safely separating and purifying the hyperoside and isoquercitroside from the aurea helianthus and is beneficial to realization of industrial production of the hyperoside and isoquercitroside.