Effect of magnetic field on the fermentation kinetics of <i>Saccharomyces cerevisiae</i>
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- 4 Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa
Abstract
Published literature has shown conflicting results regarding the effects of magnetic fields on the fermentation kinetics or cellular growth of various Saccharomyces cerevisiae strains. Here, two sets of experiments were conducted to characterize the role of magnetic fields on cell growth and ethanol production during fermentation. The first experiment was completed for 25 h at a 2% dextrose loading rate under influence of homogeneous and non-homogeneous static magnetic fields on the order of 100 and 200 mT, respectively. The second experiment was completed for 30 h at a 6% dextrose loading rate under the influence of a non-homogeneous static magnetic field on the order of 200 mT. It was found that homogeneous magnetic fields have no significant effect on the yeast cell growth, while non-homogeneous static magnetic fields produced an increase (~ 8% over the control) in peak ethanol concentration with 2% dextrose loading.
- Motta, M.A., Muniz, J.B.F., Schuler, A. and Da-Motta, M. (2004) Static magnetic fields enhancement of Saccharomyces cerevisiae ethanolic fermentation. Biotechnology Progress, Vol. 20, 393-396.
- Perez, V.H., Reyes, A.F., Justo, O.R., Alvarez, D.C. and Alegre, R.M. (2007) Bioreactor coupled with electromagnetic field generator: effects of extremely low frequency electromagnetic fields on ethanol production by Saccharomyces cerevisiae. Biotechnology Progress, Vol. 23, 1091-1094.
- Motta, M.A., Montenegro, E.J.N., Stamford, T.L.M., Silva, A.R. and Silva, F.R. (2001) Changes in Saccharomyces cerevisiae development induced by magnetic fields. Biotechnology Progress, Vol. 17, 970-973.
- Mehedintu, M. and Berg, H. (1997) Proliferation response of yeast Saccharomyces cerevisiae on electromagnetic field parameters. Bioelectrochemistry and Bioenergetics, Vol. 43, 67-70.
- Ruiz-Gomez, M.J., Prieto-Barcia, M.I., Ristori-Bogajo, E. and Martinez-Morillo, M. (2004) Static and 50 Hz magnetic fields of 0.35 and 2.45 mT have no effect on the growth of Saccharomyces cerevisiae. Bioelectrochemistry, Vol. 64, 151-155.
- Ostabe, E.S., Kuroki, S., Nikawa, J., Matsumoto, Y., Ooba, T., Kiso, K. and Hayashi, H. (2009) Yeast cells proliferation on various strong static magnetic fields and temperatures. Journal of Physics: Conference Series, Vol. 156, 1-8.
- Iwasaka, M., Ikehata, M., Miyakoshi, J. and Ueno, S. (2004) Strong static magnetic field effects on yeast proliferation and distribution. Bioelectrochemistry, Vol. 65, 59-68.
- Ismail, A.A. and Ali, A.M.M. (1971) Selection of high ethanol-yielding Saccharomyces. Folia Microbiology, Vol. 16, 346-349.
- Schuler, M.L. and Kargi, F. (2001) Bioprocess Engineering: Basic Concepts (2nd edition). New Jersey: Prentice Hall PTR.