Preparation method of soybean sprout powder and prepared soybean sprout powder

Abstract

The invention provides a preparation method of a soybean sprout powder, wherein the method includes the steps: (1) under germination conditions, making soybean germinated; (2) crushing and pulping the obtained soybean sprouts, at the temperature of 40-45 DEG C, carrying out enzymolysis treatment for 2-3 hours, hydrolyzing soybean isoflavone glycoside contained in the soybean sprouts into soybean isoflavone aglycones; (3) adding a mixed solution of ethanol and ethyl acetate into the pulp obtained in the step (2), centrifuging to obtain an upper solution and soybean sprout dregs; and (4) removing the upper solution, carrying out vacuum drying on the obtained soybean sprout dregs and crushing, and thus obtaining the soybean sprout powder. According to the method provided by the invention, through removing the soybean isoflavone aglycones, gamma-aminobutyric acid with more content can be produced in the soybean sprout powder ultimately, the defect that conventional soybean sprouts and products thereof have the application range (especially application in the infants and children eating field) limited due to containing of soybean isoflavones as phytoestrogen is overcome, and thus the soybean sprout powder becomes a possible in the field of infants and young children foods.

Description

technical field

[0001] The invention relates to the field of agricultural product processing, in particular to a method for preparing soybean sprout powder and soybean sprout powder prepared by the method. Background technique

[0002] Soybean is one of the four major oil crops in my country. It is rich in protein, unsaturated fatty acids and B vitamins. It is also an important source of high-quality protein in the diet of Chinese residents. Soybeans are germinated to form bean sprouts. There are two important functional components in bean sprouts: γ-aminobutyric acid and soybean isoflavones. Their content in bean sprouts is significantly higher than that of ungerminated soybeans.

[0003] γ-aminobutyric acid, chemical name: 4-aminobutyric acid, aliases: aminobutyric acid, pipecolic acid. Molecular formula: C 4 h 9 NO 2 . It is a naturally occurring non-protein amino acid with extremely important physiological functions, which can promote brain activation, brain and int...

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