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To study the short-term effects of radiofrequency exposure on DNA single-strand breaks in human hair root cells.
Hair samples were collected from eight healthy subjects (six women, two men) immediately before and after using a 900 MHz GSM mobile phone for 15 and 30 minutes (experiments were separated by two weeks).
About 6 or 7 hair roots were plucked behind the right ear (side of mobile phone exposure) within a 60 mm x 60 mm area. Additionally, the same subjects served as their own controls (hair samples were taken 5 and 15 minutes apart without exposure in between).
|ばく露時間||continuous for 15 min or 30 min|
|Distance between exposed object and exposure source||1.5 cm|
|ばく露装置の詳細||handset fully charged before exposure; subjects held the mobile phone at the right ear and spoke into the phone's microphone|
The data showed that exposure to a mobile phone for 15 or 30 minutes significantly increased DNA single-strand breaks in hair root cells close to the cell phone. Additionally, significantly more DNA single-strand breaks were found after 30 minutes than after 15 minutes of mobile phone use.
The authors conclude that a short-term mobile phone exposure (15 and 30 minutes) caused a significant increase in DNA single-strand breaks in human hair root cells located around the ear which was used for the mobile phone exposure.