Propionibacterium freudenreichii|BNCC188022 |BNCC

Essential Information Certificate Related Products

Propionibacterium freudenreichii

Culture medium	Columbia blood plate (CA-B): casein pancreatin digest 10.0g, cardiopancreatin digest 3.0g, corn starch 1.0g, meat gastric enzyme digest 5.0g, yeast extract 5.0g, sodium chloride 5.0, agar 20.0g, distilled water 1.0L,pH 7.3±0.2. After sterilization at 121 ℃ for 15min, cool to 55 ℃, add 5% sterile defibrated sheep blood, shake well, pour the plate and cool it for later use.
Subculture procedure	(1) Prepare a test tube containing 5~10mL of liquid medium and 2 plates; (2) Open it in the safety cabinet, heat the tip of ampoule in a flame, quickly drop sterile water to creak it, then break it with forceps; (3) draw 0.5mL of liquid culture medium into a freeze dried ampoule, fully rehydrate and transfer the solution to the liquid test tube, mix evenly; (4) inoculate a plate with 0.2mL of suspension liquid, repeat the step to obtain two plates; ⑤ Put all the liquid test tubes and plates under the above culture conditions for cultivation, and the strains can be used when they grow.
Growth conditions	30 ℃;48-72h; Anaerobic
Storage conditions	2-8 ℃
morphology	Size: 1-2mm Shape: Round Edge: Irregular Transparency: Opaque Color: milky white bulge: middle bulge surface: bright and smooth texture: moist and viscous
application	Vitamin B12.
Sharing mode	Public welfare sharing

Propionibacterium freudenreichii

Storage conditions: 2~8 ℃

No. 188022

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 loss of viability.

Gorwth conditions: 30 ℃, anaerobic, 48-72h,① Columbia blood plate (ready-to-use type) ② liquid thioglycolate culture medium: 15.0g of caseptone (trypsin hydrolysis), 5.0g of yeast extract, 5.0g of glucose, 0.5g of sodium thioglycolate, 0.5g of L-cystine, 2.5g of sodium chloride, 0.001g of azure, 0.75g of agar, distilled water 1.0L,pH 7.1 & plusmn; 0.2. Sterilization at 121 ℃ for 15min.

Recovery steps:

(1)Prepare sterile test tube of 5-10ml liquid medium and 2 plates; Silica gel plug is used for liquid test tube of liquid medium to ensure ventilation and facilitate deoxygenation. Please put the liquid medium and plate in an anaerobic environment for 24h before usage.

(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 liquid culture medium into a freeze dried ampoule, fully rehydrate and transfer the solution to the liquid test tube, mix evenly;

(4) Put the plates under the above culture conditions for cultivation for 24-48 hours.

Recovery record: According to the recovery instructions, the results of the recovery are reported as follows:

Item	test results
viability:	good viability, in 48-72hours strain layer become obvious;colony is typical on the streaked plate
colony morphology: (above)	Size: 1-2mm Shape: Round Edge: Irregular Transparency: Opaque Color: milky white uplift: middle convex surface: bright and smooth texture: moist and viscous
Conclusion:	good viability, no abnormal colony morphology, qualified

Download certificate