title: Effects of low-density static magnetic fields on the growth and activities of wastewater bacteria Escherichia coli and Pseudomonas putida.
abstract: The aim of this study was to explore the influence of a moderate static magnetic field (SMF) of different densities on Escherichia coli and Pseudomonas putida that are commonly found in wastewater treatment plants. In line with literature reports that SMF increases the efficiency of wastewater treatment the findings of this study indicated that SMF negatively influenced the growth but positively influenced the enzymatic activities and ATP levels of the two model bacteria. The inhibitory effect of SMF on growth of E. coli and P. putida was most pronounced at their optimal growth temperature (37°C and 28°C respectively) and was reversible shortly after the SMF had been terminated. Finally, the results suggested that the induced energy metabolism reflected in higher dehydrogenase activities and ATP levels may be more important for survival, and adaptation to SMF induced stress than the increase in the expression of the rpoS gene.
authors: Ptuj Municipal Service Corporation, Puhova ulica 10, SI-2250 Ptuj, Slovenia.
authors: Jasmina
authors: J
authors: Filipič
authors: Barbara
authors: B
authors: Kraigher
authors: Brigita
authors: B
authors: Tepuš
authors: Vanja
authors: V
authors: Kokol
authors: Ines
authors: I
authors: Mandic-Mulec
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D015169:Colony Count, Microbial; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics / Q000254:growth & development*; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial / Q000235:genetics; D060526:Magnetic Fields; D010088:Oxidoreductases / Q000378:metabolism; D016958:Pseudomonas putida / Q000201:enzymology / Q000254:growth & development*; D012808:Sigma Factor / Q000235:genetics / Q000378:metabolism; D013696:Temperature; D062065:Wastewater / Q000382:microbiology*
chemical_list: D000255:Adenosine Triphosphate; D001426:Bacterial Proteins; D010088:Oxidoreductases; D012808:Sigma Factor; D062065:Wastewater; C069567:sigma factor KatF protein, Bacteria