Effects of low-density static magnetic fields on the growth and activities of wastewater bacteria Escherichia coli and Pseudomonas putida

The Effect of Rotating Magnetic Field on Enterotoxin Genes Expression in Staphylococcus Aureus Strains

“…There are many data demonstrating direct and indirect influence of the MFs on the viability of bacterial cells [25], their morphological [5] and biochemical properties [7,25], genetic variability and gene expression [7,26]. Some literature data are already available according to which, the MF exposure may cause DNA damage in terms of point mutations [27] or degradation of DNA due to direct interaction or as a result of the activity of oxygen radicals [28].…”

The Effects of Rotating Magnetic Field on Growth Rate, Cell Metabolic Activity and Biofilm Formation by Staphylococcus Aureus and Escherichia Coli

“…SMF; 100 mT; exposure time 30, 60, 120, 240 min the MF exposure for 30 min had no effect on bacterial cell density; the longer MF exposure (120, 240 min) caused growth inhibition [28] SMF; 7-11 Hz; exposure time 220 min the MF had no effect on DNA damage; the MF had stimulating effect on cell growth [29] SMF; 5, 17 and 50 mT; exposure time 1, 2, 3 and 4 h the MF negatively influences the growth; the MF caused an increase in dehydrogenase activity and higher intracellular ATP concentrations [30] SMF; 10 mT; 50 Hz; exposure time 1h the MF had no effect on bacterial morphology [1] SMF; 2 mT; 50 Hz; exposure time 6, 16 h the MF caused a decrease in the cell growth [31] SMF; 5.2-6.1 T; exposure time 30 h the MF increased suppression of cell death; the MF stimulated growth [32] SMF; 50 Hz; 1 mT; exposure time 8 min, 2, 5 and 15 h the MF had no effect on cell viability regardless of exposure time [33] SMF; 5.2-6.1 T; exposure time 12 h the MF caused a suppressive effect on the cell death rate [34] SMF; 45-3500 mT; exposure time 60 min the MF caused a decrease in the number of CFU; the MF influenced on cell surface damage [35] SMF; 300 mT; exposure time 50 h the MF had no effect on the growth; the MF stimulated transposition activity [36] SMF; 2.7-10 mT; 50 Hz; exposure time 0-12 min the MF affected the bacteria E. coli; the MF was not bacteriostatic; the MF had no effect on the metabolism of the bacteria; the MF killed a part of bacteria exposed [37] SMF; 5, 10 and 13 T; exposure time 24 h the MF had no effect on mutation frequency in thymine synthesis genes [38] E. coli; S. aureus SMF; 10 mT; 50 Hz; exposure time < 30 min the MF caused a decrease in the cell viability; the MF caused a decrease in CFU [20] DCMF; 0.5-4 T; exposure time 30-120 min the MF had no influence on growth [21] SMF; 30-100 mT; exposure time 30 h the MF had no effect on growth [22] homogeneous SMF (400 mT); inhomogeneous SMF; (1.2-47.7 T); exposure time 10, 30, 50, 1440 min the MF had no effect on growth [39] MF; up to 10 mT; 50 Hz; exposure time up to 24 min the MF caused a decrease in optical densities of bacterial cultures [40] SMF (DCMF); 10 T; exposure time 5-60 min the MF altered the components and structure of nucleic acid, protein, and fatty acids [37] S. aureus SMF; 50-20.000 Gauss the MF had no effect on growth, when the field strength increased there were a slight growth inhibition EMF; 20 Hz; 5 mT; exposure time 24 h the MF had no effect on growth on gel-like medium; the MF caused a decrease in growth in fluid medium [4] AC -alternating current; ACMF -alternating current magnetic field; DC -direct current; DCMF -direct current magnetic field; EF -electric field; EMF -electromagn...…”

Application of a weak magnetic field to improve microbial fuel cell performance

“…Especially, magnetic fields (MFs) stimulation offers a potentially low-cost and convenient approach to enhance microbial activity, since a static MF can be continuously and conveniently applied to any biosystem without need for extra energy input (Ji et al 2010;Filipic et al 2012). Previous studies have demonstrated that implementation of an appropriate MF could raise microbial activity and accelerate contaminant degradation in wastewater treatment systems Kriklavova et al 2014;Zaidi et al 2014).…”