Method for preparing selenium-rich rice polypeptide

Abstract

The invention provides a method for preparing selenium-rich rice polypeptide. The method comprises the following steps: (1) picking up fresh and high-quality selenium-rich rice, removing impurities, elutriating the selenium-rich rice until no turbid water exits, and grinding the selenium-rich rice into powder; (2) adding selenium-rich grain stillage left after wine production; (3) adding selenium-rich yeast which is obtained by virtue of a microbial strain technology, firstly picking up a yeast colony capable of converting inorganic selenium into organic selenium by using the inorganic selenium near a selenium ore, carrying out separating and enrichment culturing on the yeast colony to obtain a pure yeast specie; (4) putting the selenium-rich rice in a cylinder and fermenting; (5) filtering and detecting; (6) extracting selenium-rich rice polypeptide, namely extracting polypeptide from filtrate by adopting an electrophoretic separation method. The selenium-rich rice polypeptide extracted by the method provided by the invention is prepared from a pure natural raw material and has an obvious biological activity effect, meanwhile, the raw material is waste grain stillage left after wine production, so that the production cost is low, and sources and energy sources can be effectively saved.

Description

technical field [0001] The invention is a preparation method of rice polypeptide rich in organic active selenium. Background technique [0002] Rice polypeptide is the hydrolyzate of rice protein, its amino acid composition is almost the same as that of rice protein, and its essential amino acid ratio is balanced and rich in content. It has superior physiological functions and processing characteristics than rice protein, which greatly expands the application field of rice protein. The selenium-enriched rice polypeptide is to make the rice polypeptide rich in organic active selenium under the premise of rice polypeptide. Organic selenium generally exists in the form of selenomethionine. Rice polypeptide has many unique physiological functional characteristics, such as rice polypeptide is easier to digest and absorb than rice protein in the human body, and has lower antigenicity; it can promote fat metabolism in the human body, restore muscle red blood cells, and enhance m...

AI Technical Summary

Problems solved by technology

[0004] At present, many enterprises and scientific research institutes are working hard to increase the organic selenium content in rice peptides in various links, but there is no process that can convert all the inorganic selenium added in rice peptides into organic selenium, and the remaining Inorganic selenium is toxic to the human body