Bacteria cellulose controlled-release carrier material of sandwich structure and preparation method thereof
A technology of bacterial cellulose and bacterial cellulose membrane, which is applied in the field of bacterial cellulose slow-release carrier materials and its preparation, can solve the problems of waste of resources, environmental pollution, etc., increase the area of aerobic area, and solve the problem of changing the growth rate of cellulose The effect of slow and good controlled release performance and drug loading performance
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Embodiment 1
[0057] 1) Preparation of fermentation medium;
[0058] Components of the fermentation medium, in mass percent, in wt%: glucose, fructose, sucrose or mannitol 2, peptone 0.05, yeast extract 0.05, citric acid 0.01, disodium hydrogen phosphate 0.02, potassium dihydrogen phosphate 0.01, and amount of water;
[0059] The pH of the fermentation broth is 4.0;
[0060] The above components are mixed, sterilized by high pressure steam, irradiated with ultraviolet light and cooled to room temperature, and passed through pure oxygen to obtain the fermentation culture solution;
[0061] 2) Bacteria expansion;
[0062] The fermentation culture liquid is inoculated and expanded; the degree of expansion: the number of strain cells is 2×10 5 individual / mL.
[0063] 3) Static cultivation;
[0064] Transfer the expanded bacterial solution to a culture container filled with fermentation broth, place it in a constant temperature incubator, and culture it statically at 28°C;
[0065] By adju...
Embodiment 2
[0076] 1) Preparation of fermentation medium;
[0077] Components of the fermentation medium, in mass percent, in wt%: 5 glucose, fructose, sucrose or mannitol, 0.5 peptone, 0.5 yeast extract, 0.1 citric acid, 0.2 disodium hydrogen phosphate, 0.1 potassium dihydrogen phosphate, and amount of water;
[0078] The pH of the fermentation broth is 6.0;
[0079] The above components are mixed, sterilized by high pressure steam, irradiated with ultraviolet light and cooled to room temperature, and passed through pure oxygen to obtain the fermentation culture solution;
[0080] 2) Bacteria expansion;
[0081] The fermentation culture liquid is inoculated and expanded; the degree of expansion: the number of strain cells is 2×10 7 individual / mL.
[0082] 3) Static cultivation;
[0083] Transfer the expanded bacterial solution to a culture container filled with fermentation broth, place it in a constant temperature incubator, and culture it statically at 32°C;
[0084] By adjusting...
Embodiment 3
[0095] 1) Preparation of fermentation medium;
[0096] Components of the fermentation medium, in mass percent, in wt%: 3 glucose, fructose, sucrose or mannitol, 0.3 peptone, 0.3 yeast extract, 0.05 citric acid, 0.1 disodium hydrogen phosphate, 0.05 potassium dihydrogen phosphate, and amount of water;
[0097] The pH of the fermentation broth is 5.0;
[0098] The above components are mixed, sterilized by high pressure steam, irradiated with ultraviolet light and cooled to room temperature, and passed through pure oxygen to obtain the fermentation culture solution;
[0099] 2) Bacteria expansion;
[0100] The fermentation culture liquid is inoculated and expanded; the degree of expansion: the number of strain cells is 2×10 7 individual / mL.
[0101] 3) Static cultivation;
[0102] Transfer the expanded bacterial solution to a culture container filled with fermentation broth, place it in a constant temperature incubator, and culture it statically at 30°C;
[0103] By adjusti...
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