Aspergillus flavus|142788 |BNCC

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Aspergillus flavus

Subculture procedure	① Prepare the above two tablets; ② After disinfecting the surface of the ampoule tube, open it in a safety cabinet, burn the top with an alcohol lamp, quickly drip sterile water to break it, and then use tweezers to crush it; ③ Take 0.5mL of sterile water and transfer it into a freeze-drying tube. After fully dissolving the bacterial powder, transfer it into 2 plates at a rate of 200 μ L per Agar plate and apply evenly; ④ Place the petri dish under the above cultivation conditions for cultivation, and once the bacterial strain grows, it can be used.
Growth conditions	28 ℃; 5-7 days; aerobic
Storage conditions	2-8 ℃
Safety level	2
morphology	Small filamentous fungi have obvious colonies on comprehensive PDA medium, with white and dense hyphae in the early stage, and yellow spores in the later stage. The back of the medium is yellow
Sharing mode	Public welfare sharing

Aspergillus flavus

Storage conditions: 2~8 ℃

No. 142788

Product format: freeze dried, 200ul

Validity : 6 years

Biosafety level: 2 , handle in safety cabinet

Receiving notice: if any abnormality is found on the day of receipt, please contact the customer service within 24 hours. If it is overdue, it is deemed that the bacteria are well. The freeze dried culture shall be used up once and shall not be retained. The bacterial viability will resume after 1-2 generation of recovery and can be used normally. Handling instructions of agar plate is enclosed. Please operate in strict accordance with this instruction, otherwise the replacement of bacteria are not be available in case of aberrant growth and loss of viability.

Growth conditions :28 ℃, aerobic, comprehensive PDA,5-7 days, comprehensive PDA: potato boil 1.0L, glucose 20.0g,KH2PO4 3.0g,MgSO4·7H2O 1.5g, vitamin B1 trace, agar 20.0g,pH 6.0±0.2. Sterilization at 121 ℃ for 15min. Potato boiling solution: weigh 200g of peeled potato pieces, boil in boiling water for 30min, and collect filtrate to a constant volume of 1.0L.

Recovery steps:
(1) Prepare 1-2 of above mentioned plates;
(2) Open it in the biosafety cabinet, sterilize of the ampoule, heat the tip in a flame, quickly drop sterile water to creak it, then break it with forceps;
(3) draw 0.5ml of sterile water into the freeze dried ampoule, make it fully dissolved, and distribute the solution to the plates well in 200ul/plate;
(4) Put the plates under the above culture conditions for cultivation for 5-7 days.
Recovery record: According to the recovery instructions, the results of the recovery are reported as follows:

Item	test results
viability:	good viability, in 5days strain layer become obvious
colony morphology: (above)	small filamentous fungi, the colony is obvious on the comprehensive PDA medium, the initial hyphae are white, dense and vigorous, and the yellow spores are full of plates.
Conclusion:	good viability, no abnormal colony morphology, qualified

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