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Vitamin B 12 formation by a gram-variable methanol-utilizing bacterium

โœ Scribed by G. Dumenil; A. Cremieux; J. Chevalier; H. Guiraud

Publisher
Springer Netherlands
Year
1981
Tongue
English
Weight
234 KB
Volume
3
Category
Article
ISSN
0141-5492

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โœฆ Synopsis

A methanol-utilizing bacterium isolated from soil was studied for ability to produce vitamin B 12. The isolated strain XF is gram-variable, pink-pigmented and rod-shaDed. Effects of growth conditions on vitamin B 12 productivity were examined. The maximal yield of vitamin B 12 was 280 pg/l in shaked flasks and 236 pg/l in fermentation jars.

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Constant fed-batch culture of methanol-utilizing corynebacterium producing vitamin B 12
โœ M. Andriantsoa; M. Laget; A. Cremieux; G. Dumenil ๐Ÿ“‚ Article ๐Ÿ“… 1984 ๐Ÿ› Springer Netherlands ๐ŸŒ English โš– 252 KB

## SUWtRY. A fed-batch culture of methanol-utilizing microorganism (Corynebacterim sp. XG), a vitamin B 12 producer, was carried out with constant feed of substrate. Experimental results agreed with the theorical model proposed in the literature. Using this feeding system, the final biomass and vi