Resveratrol grape concentrated essence and preparation method thereof

Abstract

The invention discloses resveratrol grape concentrated essence and a preparation method thereof. Grapes are used as raw materials, and through main technologies of alcohol fermentation of the grapes with stems and peels, nucleoside promotion, freeze concentration of the grapes with stems and peels, vacuum distillation, ultrafiltration and bacteria removal, sterile filling and the like, the grape concentrated essence in which the concentration of resveratrol glycoside is larger than or equal to 60mg / L; distilled by products are adjusted and aged through alcoholic strength so as to obtain brandy of 36%-45%(v / v). Under acid conditions, resveratrol and glucose interact to generate the resveratrol glycoside, so that the content of the resveratrol and the glucoside thereof in products can be obviously increased; the problems that the solubility of the resveratrol in water is low and the resveratrol is not easy to extract are solved; the resveratrol in the products can maintain original bioactivity through the freeze concentration and the vacuum distillation. The products disclosed by the invention are rich in various antioxidation ingredients, such as the resveratrol. The resveratrol grape concentrated essence products have good palatability, and concurrently have a health-care function and unique flavor; if the resveratrol grape concentrated essence products are eaten for a long term, the resveratrol grape concentrated essence products can have the effects of reducing blood sugar, reducing blood fat, reducing blood pressure, dissolving thrombus and the like.

Description

technical field [0001] The invention relates to a nutritional resveratrol grape concentrated essence and its preparation, in particular to the resveratrol grape concentrated essence made from grapes and its preparation method. [0002] technical background [0003] Resveratrol, also known as stilbene triphenols, belongs to polyphenolic compounds, mainly found in the fruit stems and peels of grapes. According to relevant reports, resveratrol has obvious preventive and treatment effects on cardiovascular diseases and cancer. It also has preventive effects on hormone-dependent tumors, osteoporosis, acne and Alzheimer's disease. Resveratrol is insoluble in water, but easily soluble in organic solvents such as ethanol, ether, chloroform, acetone, etc. The hydroxyl group on the benzene ring of resveratrol can interact with the hydroxyl group of the glucose molecule to remove a water molecule to form resveratrol glycosides, thereby increasing the solubility of resveratrol in water...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, solve the problem that resveratrol has low solubility and is not easy to be extracted during the fermentation process of grapes with stalks and skins, and provide a kind of resveratrol rich in resveratrol processed with grapes as raw material. Grape concentrate essence of retrol and preparation method thereof

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