Aspergillus tubingensis and method for producing theabrownins through liquid fermentation of Aspergillus tubingensis
A technology of Aspergillus tabin and theabrownin, which is applied in the field of Aspergillus tabin and its liquid fermentation production of theabrownin, can solve problems such as no public reports, and achieve high efficiency, automation, and easy control of production conditions and environment. Effect
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Embodiment 1
[0016] Example 1: Isolation and Identification of Aspergillus tubingensis KUtea 00
[0017] (1) Solid-state fermented Pu-erh tea: Spray 200mL of distilled water on 400g of large-leaf sun-dried green tea (Camellia sinensis var.assamica) to make the initial moisture content of the tea leaves reach 35%. Ferment for 14 days in a 70% fully automatic constant temperature and humidity fermentation box. On the 8th day, the tea leaves were turned over and properly sprayed to replenish water, and after the fermentation was completed, they were blast-dried at 60° C. to obtain ripe Pu-erh tea. The content of theabrownin in the obtained Pu'er cooked tea sample was 10% through traditional extraction and colorimetric analysis.
[0018] (2) Isolation, purification and identification of fungi: During the solid-state fermentation, samples were taken every day, and the microorganisms were separated by the dilution plate method. Weigh 1 g of the sample into a conical flask containing 9 mL of st...
Embodiment 2
[0021] Example 2: Using Aspergillus tubingensis KUtea 00 obtained in Example 1 for the production of theabrownin from liquid fermented green tea water extract
[0022] (1) Preparation of green tea water extract: large leaf sun-dried green tea (Camellia sinensis var. 30mL. The water extract was pasteurized (80°C, 30min) and then cooled to room temperature for the subsequent liquid fermentation of Aspergillus tubingensis KUtea 00 to produce theabrownin.
[0023] (2) Seed culture medium: Inoculate 1-2 spores of Aspergillus cyclatabingensis KUtea 00 into a 125 mL Erlenmeyer flask containing 25 mL of the above-mentioned pasteurized green tea water extract under aseptic operation, shake the flask at 250 rpm and 40°C After culturing for 24 hours, the resulting medium is the seed medium.
[0024] (3) Production of theabrownin by liquid fermentation: Inoculate 25mL of the above-mentioned seed medium into a 500mL triangular flask containing 225mL of pasteurized green tea water extract...
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