Abstract
In this study the effects of microwaves on the secondary structure of three typical proteins have been investigated. A set of samples of lysozyme, bovine serum albumin and myoglobin in D2O solutions were exposed for 8 hours to mobile phone microwaves at 900 MHz at a magnetic field intensity around 16 mA/m. The relative effects on the secondary structure of the proteins were studied by means of Fourier Transform Infrared Spectroscopy. An increase of the amide I band intensity in the secondary structure of the proteins was observed after the microwaves exposure. Furthermore, a weak shift of the amide I mode of bovine serum albumin and a heavier shift of the amide I of myoglobin occurred after the exposure. In addition, a clear increasing of the β-sheet components with respect to the α-helix content was observed in the spectra of bovine serum albumin and myoglobin after the exposure, suggesting the hypothesis of the formation of aggregates.
Highlights
Mobile phones and related telephony technologies transmit information that is encoded into electromagnetic waves in the microwave range around 900 MHz and 1800 MHz.The Global System for Mobile Communications (GSM) radiation is characterized by a high frequency (HF) carrier wave periodically pulsed at low frequency (LF)
A set of samples of lysozyme, bovine serum albumin and myoglobin in D2O solutions were exposed for 8 hours to mobile phone microwaves at 900 MHz at a magnetic field intensity around 16 mA/m
H2O is the ideal solvent for biological sample, but the intense H2O bending mode at 1640 cm-1 coincides with by Means of Fourier Transform Infrared Spectroscopy the amide I region from 1610 to 1690 cm-1
Summary
Mobile phones and related telephony technologies transmit information that is encoded into electromagnetic waves in the microwave range around 900 MHz and 1800 MHz. The Global System for Mobile Communications (GSM) radiation is characterized by a high frequency (HF) carrier wave periodically pulsed at low frequency (LF). Modulation refers to the patterns of change in the frequency or amplitude of the radiofrequency (RF) carrier wave. Every impulse sequence lasts 120 ms , it is made up by 26 impulses, and each one lasts 4.6 ms. The frequencies of these two periods are 8.3 Hz and 217 Hz. As cellular telephone technology has advanced, the modulation patterns have become increasingly complex using extremely low frequency (2 Hz-17.6 Hz)
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