Radiofrequency radiation may help astronauts in space missions

Abdollahi, Hamid; Teymouri, Maryam; Khademi, Sara

doi:10.1016/j.jmhi.2012.08.001

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…where, h is the septum height in the exposure zone (position of the MH), P TR is the input power on the GTEM cell, P TR = P IN − P REF (2) where Z 0 = 50 Ω the input impedance of the cell, and ζ is coefficient which depend of the ripple of the field in the position el MH, is set as 2 [42]. The simulations were performed at 2.45 GHz (by use of a desktop PC with an Intel Core 2 Quad processor working at 2.40 GHz, and with 4 GB RAM available); the corresponding grid positions composed of 6,762,000 voxels (minimum grid step of 0.7 mm and maximum grid step of 3 mm), for computation time of 3.5 h. The SARs were estimated by applying a correction factor to the values obtained from the numerical simulations, in proportion to the ratio between the weight of the model rat and the weights of the experimental rats, as specified by the following expression:…”

Section: Experimental Radiation System Protocolmentioning

confidence: 99%

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Exposure to 2.45 GHz Radiation Triggers Changes in HSP-70, Glucocorticoid Receptors and GFAP Biomarkers in Rat Brain

Othman

López-Furelos

Leiro

et al. 2021

IJMS

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Brain tissue may be especially sensitive to electromagnetic phenomena provoking signs of neural stress in cerebral activity. Fifty-four adult female Sprague-Dawley rats underwent ELISA and immunohistochemistry testing of four relevant anatomical areas of the cerebrum to measure biomarkers indicating induction of heat shock protein 70 (HSP-70), glucocorticoid receptors (GCR) or glial fibrillary acidic protein (GFAP) after single or repeated exposure to 2.45 GHz radiation in the experimental set-up. Neither radiation regime caused tissue heating, so thermal effects can be ruled out. A progressive decrease in GCR and HSP-70 was observed after acute or repeated irradiation in the somatosensory cortex, hypothalamus and hippocampus. In the limbic cortex; however, values for both biomarkers were significantly higher after repeated exposure to irradiation when compared to control animals. GFAP values in brain tissue after irradiation were not significantly different or were even lower than those of nonirradiated animals in all brain regions studied. Our results suggest that repeated exposure to 2.45 GHz elicited GCR/HSP-70 dysregulation in the brain, triggering a state of stress that could decrease tissue anti-inflammatory action without favoring glial proliferation and make the nervous system more vulnerable.

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Section: Experimental Radiation System Protocolmentioning

confidence: 99%

“…The use of radiofrequencies is increasing exponentially in different fields such as medicine [ 1 ], wireless communication devices and networks, and even space missions [ 2 ].…”

Section: Introductionmentioning

confidence: 99%