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Urea Semisolid Medium
[所属分类:培养基配方] [发布时间:2021-12-27] [发布人:网站管理员2] [阅读次数:] [返回]
Urea Semisolid Medium
山东拓普生物工程有限公司 培养基配方 http://www.topbiol.com
Composition per liter:
Solution A................................................... 400.0mL
Solution B ..................................................... 50.0mL
Solution A:
Composition per 400.0mL:
Pancreatic digest of casein..................................6.0g
Yeast extract........................................................2.0g
NaCl....................................................................1.0g
Yeast extract........................................................0.8g
Agar ....................................................................0.3g
L-Cystine .............................................................0.1g
Thioglycollic acid ......................................... 0.12mL
pH 7.2 ± 0.2 at 25°C
Preparation of Solution A: Add components to
distilled/deionized water and bring volume to
400.0mL. Mix thoroughly. Gently heat and bring to
boiling. Autoclave for 15 min at 15 psi pressure–
121°C. Cool to 60°C.
Solution B:
Composition per 50.0mL:
Urea.....................................................................8.0g
Na2HPO4.............................................................3.8g
KH2PO4.............................................................3.64g
Yeast extract......................................................0.04g
Phenol Red.......................................................4.0mg
Preparation of Solution B: Add components to
distilled/deionized water and bring volume to
50.0mL. Mix thoroughly. Filter sterilize.
Preparation of Medium: Aseptically combine
400.0mL of sterile solution A and 50.0mL of sterile
solution B. Mix thoroughly. Aseptically distribute
into sterile screw-capped tubes in 7.0mL volumes.
Pass the tubes into an anaerobic chamber containing
85% N2 + 10% H2 + 5% CO2 for 60 min. Close screw
caps tightly.
Use: For the cultivation and differentiation of anaer
obic bacteria based on their production of urease.
Bacteria that produce urease turn the medium bright
red.