Straling van invloed op bacteriŽn
zaterdag, 13 september 2008 - Categorie: Onderzoeken
Straling met een frequentie van rond de 50 GHz en een intensiteit van 0,6 W/m (dus niet overmatig opwarmend en niet ioniserend) halveert de groeisnelheid van Escherichia Coli.
Tadevosyan H, Kalantaryan V, Trchounian A.
Department of Biophysics, Yerevan State University, 0025, Yerevan, Armenia.
The coherent electromagnetic radiation (EMR) of the frequency of 51.8 and 53 GHz with low intensity (the power flux density of 0.06 mW/cm(2)) affected the growth of Escherichia coli K12(lambda) under fermentation conditions: the lowering of the growth specific rate was considerably (approximately 2-fold) increased with exposure duration of 30-60 min; a significant decrease in the number of viable cells was also shown. Moreover, the enforced effects of the N,N'-dicyclohexylcarbodiimide (DCCD), inhibitor of H(+)-transporting F(0)F(1)-ATPase, on energy-dependent H(+) efflux by whole cells and of antibiotics like tetracycline and chloramphenicol on the following bacterial growth and survival were also determined after radiation. In addition, the lowering in DCCD-inhibited ATPase activity of membrane vesicles from exposed cells was defined. The results confirmed the input of membranous changes in bacterial action of low intensity extremely high frequency EMR, when the F(0)F(1)-ATPase is probably playing a key role. The radiation of bacteria might lead to changed metabolic pathways and to antibiotic resistance. It may also give bacteria with a specific role in biosphere.
PMID: 18633580 PubMed - in process
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