To determine the influence of nonthermal exposure to dual band mobile phone irradiation on the structure and function of electric eel acetylcholinesterase (an important CNS enzyme).
| Exposure | Parameters |
|---|---|
|
Exposure 1:
915–1,822 MHz
Modulation type:
pulsed
Exposure duration:
continuous from 1 to 50 min
|
|
| Frequency | 915–1,822 MHz |
|---|---|
| Type | |
| Exposure duration | continuous from 1 to 50 min |
| Modulation type | pulsed |
|---|
| Exposure source |
|
|---|---|
| Distance between exposed object and exposure source | 50 mm |
| Setup | Aliquots of enzyme solution of identical volumes were placed into glass test tubes. One tube was wrapped in a single thin aluminium foil to screen RF radiation. |
| Additional info | All experiments were carried out with the phone operating in receive mode being called from a remote phone. When the phone received a call, the emitted field intensity increased in the first 10 s to a maximum of 12 V/m before decreasing to a lower "standby asymptotic" value of 1 V/m. To change the exposition time from 1 to 50 min, the samples were gradually exposed to cycles of 60 sec each. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 12 V/m | maximum | measured | - | decreasing from 12 to 1 V/m every min |
| SAR | 0.51 W/kg | unspecified | measured | unspecified | - |
The data provided evidence that in vitro simple exposure of an aqueous solution of electric eel acetylcholinesterase to cellular phone emission resulted in an irreversible monomerization of the protein accompanied by a significant change in the enzyme activity.
It is found that radiofrequency irradiation irreversibly affect the structural and biochemical characteristics of the enzyme. SR-SAXS (Synchroton radiation small-angle X-ray scattering) measurements provided data on the association of newly formed monomers into a soluble hydrogel. Jellification was confirmed by the variation of H1NMR relaxation times values. Further evidences of this process were revealed by ESEM (Environmental Scanning Electron Microscopy) observations.
Although these data cannot be used to conclude whether exposure to radiofrequency during the use of cellular phone can lead to any hazardous health effect, they may be a significant first step towards further verification of these effects on other ex vivo or in vivo biological systems.
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