Fresh yam extract as well as preparation method and application thereof

Abstract

The invention discloses a fresh yam extract as well as a preparation method and an application thereof. The preparation method comprises the following steps: peeling a raw material of fresh yams, washing, crushing, pulping and grinding by a colloid mill to prepare fresh yam pulp; adding water with the weight of 1-10 times into the fresh yam pulp, heating and extracting; carrying out centrifugal separation on aqueous extracting liquid and concentrating supernatant liquid by depressurization to prepare a fluid extract with the Baume degree of 7-20; carrying out alcohol deposition by using 95% of ethanol with the volume 2-20 times of the volume of the fluid extract; and carrying out centrifugal separation on alcohol deposition liquid, depositing residues, adding water with the weight of 10-30 times, stirring, dissolving, carrying out centrifugal separation and drying supernatant liquid to prepare the fresh yam extract. The fresh yam extract does not contain starch, and the fresh yam extract contains the main components of polysaccharide, mineral substances, proteins and the like. The fresh yam extract has the health-care function of obviously enhancing the immunity and is used for preparing a medicine or a health-care food used for enhancing the immunity.

Description

Technical field [0001] The invention belongs to the technical field of processing, extraction and separation of food and natural products, and relates to an extract of food or natural medicine yam, and a preparation method and application thereof. Background technique [0002] Yam is the tuber of Dioscorea opposite Thunb., a perennial twining herbaceous plant in the Dioscoreaceae family. The yam yam produced in Jiaozuo, Henan (formerly Huaiqing Mansion) and the yam yam produced in Guannan County, Jiangsu Province in the Huai River Basin are the same plants. Yam has the effects of nourishing the spleen, nourishing the lungs, strengthening the kidney and replenishing essence. "Shen Nong's Materia Medica" is listed as top grade. It is said that "the main injury is to invigorate the deficiency and win, remove the cold and heat evil, replenish the vitality, and grow muscles. Long-term use of ears and eyesight, light body without hunger and prolonged life." "Compendium of Materia Med...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of preparation method of fresh yam extract, can solve the problem that there is a large amount of yam starch in the extract that traditional method yam decocting piece is decocted or existing fresh yam extraction method; Overcome existing The fresh yam extraction method uses the shortcomings of toxic solvents such as chloroform and flammable and explosive solvents such as petroleum ether, and the use of dialysis methods with low production efficiency, complex processes, and low product yields.