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Fermentation of a waste-product from the industrial processing of the lime (Citrus aurantifolia swingle) for vitamin B12 production

I.- Culture conditions for Propionibacterium shermanii and effect of 5,6-dimethylbenzimidazole as precursor

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Summary

The purpose of this study was to investigate the possibility of utilizing the distillation residue, produced in the industrial processing of the lime, as a substrate for the production of vitamin B12 by Propionibacterium freudenreichii and Propionibacterium shermanii. Both microorganisms were found capable of fermenting the distillation residue with no significant differences in the production of this vitamin. However, P. shermanii was selected for the study since it presented fewer problems in the extraction and analysis of the vitamin.

After NaOH, Ca(OH)2, and NH4OH were used to adjust the pH of the medium for optimal growth of the propionibacteria strains, deficiencies in the media were corrected. NaOH was selected since it provided good yield without removing fermentation sources. Under anaerobic conditions, 5,6-dimethylbenzimidazole had a positive effect on the synthesis of vitamin B12; under anaerobic-aerobic conditions, a negative effect.

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Pérez-Mendoza, J.L., García-Hernández, F. Fermentation of a waste-product from the industrial processing of the lime (Citrus aurantifolia swingle) for vitamin B12 production. Biotechnol Lett 5, 259–264 (1983). https://doi.org/10.1007/BF00161126

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  • DOI: https://doi.org/10.1007/BF00161126

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