Method for preparing middle size or oligo-glucomannan using radiation method for degrading plump konnjaku fine powder

Abstract

A method for preparing glucomannan meso-oligosaccharide liquid from irradiated and swollen konjac powder. In this method, the konjac fine powder is fully swollen with water, and then the swollen konjac glucomannan is degraded by ionizing radiation. After irradiation, it is left to settle or filtered to remove non-degradable residues, and the glucomannan and oligosaccharide liquid products are obtained. . The product is packaged in food flexible packaging bags or hard glass containers, sealed, heat sterilized, and the storage period at room temperature is 12 to 24 months. The water swelling condition of konjac fine powder is as follows: the weight ratio of konjac fine powder to water is 1:5-60, the pH value is 3-9; Irradiation uses a cobalt-60 gamma ray irradiation source, or x-rays or electron beams. This method uses the principle of polysaccharide radiation degradation and the unique degradability of konjac glucomannan to prepare konjac glucomannan medium and oligosaccharide liquid. The advantages are that no additives are used, the process is simple, the product is pure, the physical properties are safe and stable, and the degradation rate is high. , using the existing irradiation facilities to save investment.

Description

technical field [0001] The invention relates to the agricultural application of nuclear technology and belongs to the field of radiation processing of agricultural products, in particular to a method for producing functional meso- and oligosaccharides by using konjac fine powder as a raw material by irradiation. Background technique [0002] Konjac meso-oligosaccharides are the degradation products of konjac glucomannan. According to animal experiments and clinical studies, konjac oligosaccharides are very effective in promoting the growth of bifidobacteria, and can effectively improve the structure of intestinal flora, and its performance and effect are better than lactulose, soybean oligosaccharides and galactosyl Transfer oligosaccharides. Konjac oligosaccharides also have the functions of preventing and treating hyperlipidemia, reducing blood lipid, anti-oxidation, and enhancing immune function. The feeding of young animals shows that mannan oligosaccharides can signif...

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Problems solved by technology

However, these methods all have complicated processes. For example, the chemical method needs to add reaction substances, and the separation and purification process is more complicated; the physical method mainly uses microwave and ultraviolet methods, and there is also the problem of adding chemical reagents such as hydrogen peroxide; currently the most important method is enzymatic hydrolysis. The degradation rate is high, up to 75%, and the substrate concentration is high, up to 20%. Glucomannan oligosaccharide powder products can be obtained by spray drying, but there are enzyme solutions, enzymatic hydrolysis, desalination, decolorization, drying, etc. The process is more complex

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