Biotechnology and Bioprocess Engineering:BBE

The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Production of Antibacterial Violet Pigment by Psychrotropic Bacterium RT102 Strain

  • Nakamura, Yoshitoshi (Department of Chemistry and Chemical Engineering, Faculty of Engineering, Kanazawa University) ;
  • Asada, Chikako (Department of Chemistry and Chemical Engineering, Faculty of Engineering, Kanazawa University) ;
  • Sawada, Tatsuro (Department of Chemistry and Chemical Engineering, Faculty of Engineering, Kanazawa University)
  • Published : 2003.01.01
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Abstract

The antibacterial action of violet pigment, a mixture of violacein and deoxyviolacein, isolated from phychrotrophic bacterium RT102 strain was examined, and the operational conditions for the effective production of violet pigment were studied. The antibacterial activity of the violet pigment was confirmed for several bacteria such as Bacillus licheniformis, Bacillus subtilis, Bacillus megaterium, Staphylococcus aureus, and Pseudomonas aeruginosa, and the high concentration of violet pigment, above about 15mg/L, caused not only growth inhibition but also death of cells. The growth properties of RT102 strain were clarified under various incubation conditions such as pH, temperature, and dissolved oxygen concentration. The maximum violet pigment concentration, i.e. 3.7 g/L, and the maximum productivity of violet pigment, i.e. 0.12 g .L$\^$-1/H$\^$-1/, were obtained in a batch culture of pH 6, 20$^{\circ}C$, and 1 mg/L of dissolved oxygen concentration.

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References

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