DESCOMPOSICIÓN DE MATERIA ORGÁNICA CON MICROORGANISMOS BENÉFICOS MAGNETIZADOS

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Abstract

Se describe el comportamiento de organismos unicelulares estimulados con campos magnéticos constantes de baja intensidad generada por magnetos permanentes. Se analiza su efecto en la eficiencia de degradación en el tratamiento de residuos sólidos orgánicos, empleando un consorcio microbiano comercial, monitoreando la temperatura y a tiempos finales el pH y la relación carbono: nitrógeno. Del estudio se concluye que la aplicación de campos magnéticos constantes de baja intensidad a microorganismos benéficos en los procesos de descomposición de residuos sólidos orgánicos urbanos es positiva.

Translated abstract

The behavior of unicellular organisms stimulated with constant magnetic fields of low intensity generated by permanent magnetos is described. The effect of them on the efficiency of degradation in the treatment of organic solid wastes is analyzed, using a commercial microbial consortium, controlling the temperature and at ending times, the pH and the carbon-nitrogen ratio. It is concluded from the study that the application of constant magnetic fields of low intensity to beneficial microorganisms in the processes of decomposition of urban organic solid wastes is positive.

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Increase in cortical pyramidal cell excitability accompanies depression-like behavior in mice: a transcranial magnetic stimulation study.

Peng Sun, Furong Wang, Li WANG … (2011)

Clinical evidence suggests that cortical excitability is increased in depressives. We investigated its cellular basis in a mouse model of depression. In a modified version of forced swimming (FS), mice were initially forced to swim for 5 consecutive days and then were treated daily with repetitive transcranial magnetic stimulation (rTMS) or sham treatment for the following 4 weeks without swimming. On day 2 through day 5, the mice manifested depression-like behaviors. The next and last FS was performed 4 weeks later, which revealed a 4 week maintenance of depression-like behavior in the sham mice. In slices from the sham controls, excitability in cingulate cortex pyramidal cells was elevated in terms of membrane potential and frequencies of spikes evoked by current injection. Depolarized resting potential was shown to depend on suppression of large conductance calcium-activated potassium (BK) channels. This BK channel suppression was confirmed by measuring spike width, which depends on BK channels. Chronic rTMS treatment during the 4 week period significantly reduced the depression-like behavior. In slices obtained from the rTMS mice, normal excitability and BK channel activity were recovered. Expression of a scaffold protein Homer1a was reduced by the FS and reversed by rTMS in the cingulate cortex. Similar recovery in the same behavioral, electrophysiological, and biochemical features was observed after chronic imipramine treatment. The present study demonstrated that manifestation and disappearance of depression-like behavior are in parallel with increase and decrease in cortical neuronal excitability in mice and suggested that regulation of BK channels by Homer1a is involved in this parallelism.

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

Jasmina Filipič, Barbara Kraigher, Brigita Tepuš … (2012)

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. Copyright © 2012. Published by Elsevier Ltd.