News for Iran
|Mobile-phone radiation accelerates mercury release from dental amalgam fillings|
|Iran||Created: 3 Oct 2008|
A new important clue in the connection between mobile-phone radiation and the increase of electrohypersensitivity, autism, allergies, alzheimers, parkinsons comes from researchers at the Department of Medical Physics, Shiraz University in Iran.
The researchers have discovered that exposure to mobile-phone radiation or MRI-scan magnetic field significantly accelerates the release of mercury from dental fillings and into the body.
In the 1st phase of this study, thirty patients were investigated. Five milliliter stimulated saliva was collected just before and after MRI. The magnetic flux density was 0.23 T and the duration of exposure of patients to magnetic field was 30 minutes.
In the 2nd phase, fourteen female healthy University students who had not used mobile phones before the study and did not have any previous amalgam restorations were investigated.
Dental amalgam restoration was performed for all 14 students. Their urine samples were collected before amalgam restoration and at days 1, 2, 3 and 4 after restoration.
The mean +/- SD saliva Hg concentrations of the patients before and after MRI were 8.6 +/- 3.0 and 11.3 +/- 5.3 microg L(-1), respectively (p < 0.01).
A statistical significant (p < 0.05) higher concentration was observed in the students used mobile phone.
The mean +/- SE urinary Hg concentrations of the students who used mobile phones were 2.43 +/- 0.25, 2.71 +/- 0.27, 3.79 +/- 0.25, 4.8 +/- 0.27 and 4.5 +/- 0.32 microg L(-1) before the amalgam restoration and at days 1, 2, 3 and 4, respectively.
Whereas the respective Hg concentrations in the controls, were 2.07 +/- 0.22, 2.34 +/- 0.30, 2.51 +/- 0.25, 2.66 +/- 0.24 and 2.76 +/- 0.32 microg L(-1).
It appears that MRI and microwave radiation emitted from mobile phones significantly release mercury from dental amalgam restoration.
Further research is needed to clarify whether other common sources of electromagnetic field exposure may cause alterations in dental amalgam and accelerate the release of mercury.
|Click here to view the source article.|
|Source: PubMed, Mortazavi SM, Daiee E, Yazdi A, Khiabani K, Kavousi A, Vazirinejad R, Behnejad B, Ghasemi M, Mood MB, Apr 2008|
|Cancer link to heavy mobile use|
|Iran||Created: 25 Feb 2008|
Heavy mobile phone use may be linked to an increased risk of cancer of the salivary gland, a study suggests.
Researchers looked at 500 people who had developed the condition and compared their mobile phone usage with 1,300 healthy controls.
Those who had used the phone against one side of the head for several hours a day were 50% more likely to have developed a salivary gland tumor.
The research appeared in The American Journal of Epidemiology.
Numerous studies have focused on the risk of tumors among those who use mobile phones, and overwhelmingly found no increased cancer risk.
But researchers say these have tended to focus on brain tumors, and often did not include long-term users.
Cancer of the salivary gland is a very rare condition. Of the 230,000 cases of cancer diagnosed in the UK for instance annually, only 550 relate to this area.
One of the key findings of the study was that heavy users in rural areas had an even higher risk that those in cities, due, the team suggested, to the fact that mobile phones in areas without strong signals need to emit more radiation to work properly.
But Dr. Siegal Sadetzki, who led the research, stressed one study was not enough to prove a link, and that further research was needed.
Nonetheless, until more evidence became available, a ""precautionary"" approach was best, she said, particularly when it comes to children's use of mobile phones.
Despite these latest findings, the largest and longest-running investigation ever to be carried out into mobile phone usage found no increased risk of any sort of cancer.
It followed 420,000 people in Denmark, some of whom had been using a mobile phone for as long as ten years.
There was in fact a lower incidence of cancer than expected in a group of that size, suggesting mobile phones had no impact on the development of tumors.
Last year, the UK's Mobile Telecommunications and Health Research Program said that while the evidence so far was "reassuring", there was still a need for studies to examine the very long-term impact, and to look at the effect in children.
Ed Yong, of Cancer Research UK, said: ""Mobile phones are a relatively recent invention and new research into any possible health risks is welcome.
"However, it's important to remember that the vast majority of studies so far have found that mobile phones do not increase the risk of any type of cancer."
|Click here to view the source article.|
|Source: Tehran Times,|