Aspergillus niger|191996 |BNCC

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Aspergillus niger

Subculture procedure	① Prepare 1 test tube containing 5-10mL liquid medium and 2 plates; ② Open in a safety cabinet, cauterize the top with an alcohol lamp, then quickly add sterile water to rupture it; break it into pieces with forceps; ③ Pipette 0.5mL liquid medium into the freeze-dried vial, dissolve completely, then return to the liquid test tube and mix thoroughly; ④ Pipette 0.2mL of the bacterial suspension onto a Agar plate, spread evenly; repeat twice to obtain two plates; ⑤ Incubate all liquid tubes and plates under the specified conditions. The culture is ready for use once the strain grows.
Growth conditions	28°C; 5-7 days; aerobic
Storage conditions	2-8°C
Safety level	1
morphology	Small filamentous fungus. Colony formation is distinct on comprehensive PDA medium. Initial mycelium appears pale yellow, dense, and vigorous. Later, black spores are produced, covering the entire Agar plate.
Sharing mode	Public welfare sharing

Aspergillus niger

Storage conditions: 2~8 ℃

No. 191996

Product format: freeze dried, 200ul

Validity: 6 years

Biosafety level : 1, handle in ultra-clean table or 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 slant and suspension liquid 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 lose of viability.

Gorwth 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 cell recovery are reported as follows:

Item	test results
viability:	good viability,in 5-7 days plate colony is obvious
colony morphology: (above)	small filamentous fungi with obvious colonies on comprehensive PDA medium, The initial hyphae are light yellow, dense and vigorous, and the later black spores are covered with plates.
Conclusion:	good viability, no abnormal colony morphology, qualified

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