Preparation of microbial oligosaccharide with prebiotic function
A technology of microorganisms and prebiotics, which is applied in the field of preparation of microbial oligosaccharides, and can solve problems such as microbial oligosaccharides that have not yet been seen
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[0008] Prepare the sugar production medium first, weigh 1.0g of yeast extract, 1.0g of peptone, 30g of glucose, Na 2 HPO 4 10g, KH 2 PO 4 ·3H 2 O 3g, MgSO 4 ·7H 2 O 0.2g, NaCl 1.0g, K 2 SO 4 10g, CaCl 2 0.001g, and finally add water to a total weight of 1kg. Then the pH of the enzyme production medium was adjusted to 7.2 with 1M NaOH aqueous solution. The enzyme-producing medium was sterilized by high-pressure steam at 112°C for 20 minutes, and then cooled to room temperature. Klebsiella K13 was cultured in liquid shaking with ordinary bacterial culture medium, and the growth reached the logarithmic phase after 24 hours. The culture liquid at this time was inoculated into 200ml of the above-mentioned sugar-producing medium as fermentation seeds, and liquid fermentation was carried out at 30°C for 120 hours, the fermentation broth was centrifuged to remove precipitated cells and proteins, the supernatant was collected and concentrated to 40ml by rotary evaporation ...
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