Method for extracting antibacterial peptide from fermentation liquid
A fermentation broth and antimicrobial peptide technology, which is applied in the field of antimicrobial peptide extraction, can solve the problems of pathogenic bacteria drug resistance and threats to health, and achieve the effects of avoiding secondary retention effects, enhancing secretion, and increasing the speed of circulation
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Embodiment 1
[0023] The method for extracting antimicrobial peptides from fermented liquid comprises the following steps:
[0024] 1) Bacillus subtilis was cultured with nutrient broth medium at 140r / min and 35°C for 24h; Saccharomyces cerevisiae was cultured with nutrient broth medium at 120r / min and 36°C for 24h; Aspergillus oryzae Cultivate with Chapei’s medium, culture at 160r / min, 28°C for 48h; use sterile normal saline to adjust the number of bacteria to 1.0×10 8cfu / mL; 2) With 100 parts of soybean meal as the main ingredient, 12 parts of wheat bran powder and 10 parts of corn flour as auxiliary materials, 0.8 parts of honey and 1 part of sucrose were added, and distilled water was added until the water content was 45%. 0.3 part of fermentation synergist is added after fermentation to obtain the fermentation medium; 3) Take Bacillus subtilis seed liquid, Saccharomyces cerevisiae seed liquid and Aspergillus oryzae seed liquid according to the weight ratio of 1:0.3:0.3, and mix the bac...
Embodiment 2
[0026] The method for extracting antimicrobial peptides from fermented liquid comprises the following steps:
[0027] 1) Preparation of seed solution: Bacillus subtilis was cultured with nutrient broth medium at 160r / min and 37°C for 48 hours; Saccharomyces cerevisiae was cultured with nutrient broth medium at 150r / min and 38°C 36h; Aspergillus oryzae was cultured using Chapei’s medium at 180r / min, 30°C for 72h; the number of bacteria was adjusted to 1.2×10 with sterile normal saline respectively. 8 cfu / mL; Under different culture conditions, expand the culture of Bacillus subtilis, Saccharomyces cerevisiae and Aspergillus oryzae, and use the sufficient nitrogen source, carbon source and trace elements in the nutrient medium to make each strain rapidly grow The vigorous stage prepares for further mixed fermentation;
[0028] 2) Preparation of fermentation medium: 120 parts of soybean meal as the main ingredient, 15 parts of wheat bran powder and 15 parts of corn flour as auxi...
Embodiment 3
[0035] The method for extracting antimicrobial peptides from fermentation broth comprises: preparing seed liquid, preparing fermentation medium, fermenting, ultrafiltration, and separating, specifically including the following steps:
[0036] Preparation of seed solution: Bacillus subtilis was cultured with nutrient broth medium, cultured at 150r / min, 36°C for 36h; Saccharomyces cerevisiae was cultured with nutrient broth medium, cultured at 150r / min, 37°C for 30h; Aspergillus oryzae was cultured using Chapei’s medium at 170r / min, 28°C for 48h; the number of bacteria was adjusted to 1.2×10 with sterile normal saline. 8 cfu / mL; Under different culture conditions, expand the culture of Bacillus subtilis, Saccharomyces cerevisiae and Aspergillus oryzae, and use the sufficient nitrogen source, carbon source and trace elements in the nutrient medium to make each strain rapidly grow The vigorous stage prepares for further mixed fermentation;
[0037] Preparation of fermentation med...
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