Preparation method of asparagus agar oligosaccharide

Abstract

The invention provides a preparation method of asparagus agar oligosaccharide, and relates to the technical field of oligosaccharide production. The preparation method comprises the following steps: (1) soaking the asparagus in salt brine for 3 to 5 hours, and then drying the asparagus; (2) pulverizing the asparagus in a pulverizer and filtering the smashed asparagus to obtain asparagus puree; (3)adding the asparagus puree into water at the mass ratio of the asparagus puree to the water tobe 1 to (21-26), and heating the mixture at the temperature of 105-115 DEG C for 90-105 min to obtain a water-extracted mixture; (4) carrying out microwave heating and agar extraction on the water-extracted mixture to obtain an agar solution; (5) after cooling, adding a buffer agent and beta-agarase, heating the mixture to 38-45 DEG C, and carrying out enzymolysis on the mixture for 3-10 h to obtain an asparagus oligosaccharide solution; and (6) drying the asparagus oligosaccharide solution to obtainthe asparagus oligosaccharide. According to the invention, the agar is extracted by the process of crushing, heating and microwave treatment of the asparagus, the extraction rate of the agar is increased and the prepared agar oligosaccharide has high antioxidant activity and high probiotics activity.

Description

technical field [0001] The invention relates to the technical field of oligosaccharide production, in particular to a preparation method of asparagus agar oligosaccharide. Background technique [0002] Asparagus is a kind of seaweed plant. The algae are reddish brown. Most of them grow on disc-shaped holders, growing linearly and upright in a cylindrical shape. The mature algae have long branches, and the upper part of the branches often grows into a whip. The algae like to grow in the sand swamp in the lower part of the intertidal zone and above and below the rocks covered with sand. When the temperature is not suitable, the exposed part will die. When the temperature is suitable for its growth, asparagus will grow again. New algae branches can be planted in large areas in my country at present. [0003] Asparagus contains polysaccharides, phycobiliproteins and amino acids, and the former two account for the vast majority. [0004] Among them, sugars accounted for the larg...

AI Technical Summary

Problems solved by technology

[0007] In the prior art, the extraction of agar oligosaccharides usually uses a chemical method or an enzymatic hydrolysis method to extract the agar. The chemical method uses strong acid and strong alkali chemical substances when extracting the agar, such as the patent application number CN201510019814.4 discloses a kind of Gracilaria agarose oligosaccharide and its preparation method, the safety of the production process is poor, and it will cause environmental pollution

Both the chemical method and the enzymatic hydrolysis method have the defects of low agar extraction rate, poor antioxidant activity and low probiotic activity of the produced agar oligosaccharides

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