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NASE MORE : International Journal of Maritime Science & Technology, Vol. 65 No. 2, 2018.

Original scientific paper

https://doi.org/10.17818/NM/2018/2.2

The Influence of Electromagnetic Field on Viability of Marine Microalgae Tetraselmis Suecica and Bacteria Escherichia Coli and Enterococcus Faecalis

Marina Brailo ; University of Dubrovnik, Department of Aquaculture
Marijana Pećarević ; University of Dubrovnik, Department of Aquaculture
Dolores Grilec orcid id orcid.org/0000-0002-6444-540X ; Department of Environmental Health Public Health Institute of the Dubrovnik-Neretva County
Mato Mišković ; Dubrovnik Hydro Power Plant University of Dubrovnik, Electrical Engineering and Computing Department
Dinka Lale ; Energy and Information Technology Agency, Dubrovnik
Mate Jurjević ; University of Dubrovnik Maritime Department
Marijeta Čalić ; University of Dubrovnik, Institute for Marine and Coastal Research
Josip Mikuš orcid id orcid.org/0000-0003-2576-400X ; University of Dubrovnik Department of Aquaculture
Ana Bratoš Cetinić orcid id orcid.org/0000-0002-2928-4858 ; University of Dubrovnik, Department of Aquaculture

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Abstract

The objective of this study was to determine whether the use of the electromagnetic field (EMF) of 50 Hz frequency and magnetic induction of 0.25 T could make for successful inactivation of a phytoplankton species, namely, marine microalgae Tetraselmis suecica and two bacteria strains; Escherichia coli and Enterococcus faecalis. A number of laboratory electromagnetic field tolerance experiments with the selected organisms was performed; each microorganism was treated for various lengths of time; 1, 5 and 10 minutes, and in three various media with special regards to the conductivity. Bacteria were exposed to high, moderate and extremely low conductivity media, and the microalgae to high, low and extremely low conductivity media. The microbial viability was checked by counting the bacterial colony forming units, as well as alive and dead stained microalgae cells. It was found that the time of exposure to the EMF had a profound effect on the viability of T. suecica only in the extremely low conductivity media, and that it did not affect the viability of E. coli or E. faecalis at all.

Keywords

microorganisms; magnetic treatment; conductivity

Hrčak ID:

200772

URI

https://hrcak.srce.hr/200772

Publication date:

1.6.2018.

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