32 results about "Rosavin" patented technology

The invention discloses a method for extracting rosavin from Rhodiola rosea. The method includes the following steps that 1) the Rhodiola rosea is used as a raw material, a 60%-70% ethanol solution is used for conducting reflux extraction, after an extracting solution is concentrated, centrifuging is carried out, a liquid supernatant is washed until effluent is clarified through a chromatographic column filled with macroporous resin, elution is carried out first by using a 15%-25% ethanol solution, then elution is carried out again by using a 60%-70% ethanol solution, and after concentration and drying are completed, a crude extract is obtained; 2) subcritical extraction is conducted on the crude extract by using dichloromethane as an extraction agent, the injection rate of the extraction agent is one to two times of the weight of the crude extract, the extraction temperature is 38-42 DEG C, the extraction pressure is 2.3-2.7MPa, the extraction time is 20-40min, and after the self-volatilized dichloromethane is recycled, a finished product can be obtained. The method for extracting the rosavin from the Rhodiola rosea is simple in step, short in used time and few in dosage of reagents, the yield is about 1.5%, the content of the rosavin is about 80%, the yield and the purity are high, and therefore the method is more suitable for industrial production.

The invention discloses a method for synchronously separating and preparing salidroside and rosavin from rhodiola rosea, comprising the following steps: (1) taking the rhodiola rosea as a raw material, and extracting by using analcohol aqueous solution containing a deep-eutectic solvent, wherein the deep-eutectic solvent has the effects of emulsifying, wetting, being assistant in dissolving and the like, and is beneficial for the extraction of the salidroside and the rosavin; (2) preparing a salidrosidecrude extracting solution and a rosavin crude extracting solution respectively from the extract by combining a mixed macroporous resinexpanded bed technology and a gradient elution technology; (3) preparing a salidrosideextract and a rosavin extract from the salidrosidecrude extracting solution and the rosavin crude extracting solution respectively by using the mixed macroporous resinexpanded bed technology again. Through HPLC content testing, the content of the salidroside in the salidroside extract is 40 percent to 80 percent, and the recovery is 60 percent to 88 percent; the content of the rosavin in the rosavinextract is 30 percent to 70 percent, and the recovery is 65 percent to 85 percent.

The invention provides a rhodiola crenulata extract which is characterized in that: in the extract, the weight percentage of rhodioloside is not less than 10%, the weight percentage of rhodiola polysaccharide is not less than 30%, and the weight percentage of rhodiola polyphenol is not less than 34.0%; and the content of rosavin is 0%. The invention also provides a preparation method of the extract. The rhodiola crenulata provided by the invention has the advantages of exact drug effect, stable quality and strong controllability.

The invention discloses a method for efficiently extracting salidroside and rosavin from rhodiola rosea. The method comprises the following steps of: selecting rhodiola rosea roots, drying, and rapidly air-cooling; crushing the dried rhodiola rosea roots, and screening into the granularity of 40 meshes; adding 2% of hexadecyl trimethyl quaternary ammonium bromide and 80% alcohol solution of 1% of potassium acetate in an amount of 10 times of the weight of the rhodiola rosea into the obtained rhodiola rosea powder, performing dynamic countercurrent extraction at a temperature of 25 DEG C so as to obtain an extracting solution; performing vacuum concentration, concentrating into an extract proportion of 1.15-1.20; adding acidified pure water in an amount of 7 times of the weight into the obtained extract, fully stirring, precipitating in a refrigerated storage and staying overnight, and separating the precipitate; and performing spray drying, thereby obtaining the product. The production method provided by the invention is a one-step extraction method, the dynamic countercurrent extraction is adopted, extraction, separation and purification are simultaneously performed, the method is high in extraction speed, high in efficiency, low in energy consumption, simple in process and low in cost, and the product recovery rate is obviously improved.

The invention relates to a process for preparing a rhodiola rosea extract with a high antioxidant value using the ultrafiltration method. The process comprises the following steps: (1) drying and crushing rhodiola rosea material to obtain crude powder, extracting with an ethanol solution, and then filtering and concentrating to obtain a concentrate; (2) adsorbing the concentrate via macroporous adsorbent resin, preparing elution solvents, eluting the resin with the solvents respectively, and collecting the eluates; (3) performing step-by-step membrane filtration on the eluates to obtain a target solution; (4) concentrating the target solution and then drying by the freeze-drying method, and producing the rhodiola rosea extract with a high antioxidant value. With adoption of the combination of the membrane filtration method and the freeze-drying method, a high content of rhodiola rosea extract with a high antioxidant value is obtained, and the rosavin content of the rhodiola rosea extract obtained by the method is 5-25%, the salidroside content is 5-20%, and the antioxidant value is 1000-2000 mumole TE / g.

The invention discloses a compound Rhodiola rosea anti-fatigued fruit drink. The drink of the invention is prepared from Salisorosides Rosavin, Rhodiola Rosavins, Astragalin Astragaloside II, hawthorn leaf flavonoids, taurine, lysine, inositol, vitamin PP, vitamin B6, vitamin B12, water, citric acid, fruit juice and white granulated sugar in combination rationality. The drink of the invention is moderately sour and sweet in mouthfeel, and is tasty and refreshing, has the fragrance of fresh oranges or other fruits, and has the effects of antifatigue and resisting lack of oxygen.