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Influence of Antibiotics and Surfactants Addition on Growth and Methionine Productivity by <i>Bacillus cereus</i>
Department of Applied Microbiology and Brewing, Nnamdi Azikiwe University Awka, Awka, Nigeria
Department of Applied Microbiology and Brewing, Nnamdi Azikiwe University Awka, Awka, Nigeria
Department of Biological Sciences, Aba Take-off Campus, Rhema University, Obeama-Asa, Nigeria
- 1 Department of Applied Microbiology and Brewing, Nnamdi Azikiwe University Awka, Awka, Nigeria
- 2 Department of Applied Microbiology and Brewing, Nnamdi Azikiwe University Awka, Awka, Nigeria
- 3 Department of Biological Sciences, Aba Take-off Campus, Rhema University, Obeama-Asa, Nigeria
Advances in Microbiology·Volume 03 (2013)·Pages 26–31·Published 27 March 2013·DOI10.4236/aim.2013.31004
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Abstract
The effects of antibiotics and surfactant addition on methionine accumulation in the broth culture of three strains of methionine yeilding Bacillus cereus ( B. cereus DS-13, B. cereus AS-9 and B. cereus RS-16) recovered from different soil ecovars in Owerri Nigeria were investigated. Ampicillin and erythromycin neither stimulated growth nor enhanced methionine production in Bacillus cereus DS-13, while tetracycline and chloramphenicol stimulated growth and en hanced methionine yield in Bacillus cereus DS-13 and Bacillus cereus AS-9. Ampicllin had the highest stimulatory effect on growth and methionine production in Bacillus cereus RS 16. Tween 80 and palmitic acid stimulated growth and improved methionine accumulation in the broth culture of all Bacillus strains while stearic acid did not improve yield in all Bacillus strains.
KeywordsMethionine<i>Bacillus cereus</i>FermentationAntibioticsSurfactants
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