- 1) RESEARCHERS PROBE CELL-PHONE EFFECTS By J. Raloff
- Science News, Vol. 157, No. 7, 2-12-2000, p. 100.
- Cell phones are hot. Some 85 million U.S. residents --
30 percent of the population -- have joined the mobile-phone revolution.
Still, Americans have been relatively slow to go wireless.
- Even a decade ago, when U.S. cell-phone use was a rarity,
10 percent of Swedes had taken the wireless plunge, says Maria Feychting
of the Karolinska Institute in Stockholm. Today, Nordic countries remain
Western leaders, with 40 percent of Danes, half of Norwegians and Swedes,
and almost 60 percent of Finns using cell phones.
- Many of these people are also reporting side effects,
observes Monica Sandström of the Swedish National Institute for Working
Life in Umeå. Last week at a Bioelectromagnetics Society symposium
in Washington, D.C., she unveiled data from her agency's new survey of
cell-phone users -- 5,000 in Norway and another 12,000 in Sweden.
- One-quarter of the Norwegian users, she noted, feel warmth
on or behind the ear when they use their phones. More troubling, she said,
20 percent also linked frequent headaches and recurring fatigue to cell-phone
use. Her agency saw the same trends in Sweden, though the overall rates
were somewhat lower, Sandström notes. At least one of the symptoms
noted, which include dizziness, concentration difficulties, memory loss,
and a burning sensation, showed up in 47 percent of people who reported
using these wireless devices an hour or more daily.
- Cellular phones, which send and receive radiofrequency
(RF) signals via their attached antennas, come in digital and analog varieties.
The newer, digital phones broadcast their communications in discrete bursts
of energy, whereas analog devices employ continuous signals. Being energy
hogs, analog phones also beam eight times as much energy into the user's
head as digital phones do.
- Overall, "people using analog phones reported more
symptoms and more sensations of all kinds," Sandström says. However,
she's quick to add, "we didn't measure RF emissions." Any headaches
or other complaints might therefore trace to factors such as occupational
stress, ergonomic issues, and even the warmth given off by a phone's battery.
- Yet cell phones' RF emissions clearly can affect the
brain, says Alan W. Preece of the University of Bristol in England. Last
April, he published a study in which devices simulated a phone's RF emissions,
in either digital or analog form, while volunteers sat at a computer. The
researchers could switch the RF energy on or off without a user knowing.
- "I was looking for memory effects but didn't find
any," Preece notes. Instead, to his surprise, RF emissions from both
digital and analog signals correlated with a cut in the time it took users
to answer simple questions. The improvement was small, just 15 milliseconds.
- Since then, he notes, a Finnish group recorded a similar
drop in reaction time among people during RF exposures. And a few weeks
ago, a statistical expert "acting on behalf of the Department of Health
here [in Britain] reanalyzed my data," Preece told Science News. "He
came up with the same results."
- While hardly a hazard, the quickened reaction times demonstrate
that cell-phone emissions are biologically active, Preece says. He's now
probing what's going on, scouting for changes in blood flow within the
brain. He's especially interested in the angular gyrus, a structure important
to decision making.
- Other scientists last week reported biological effects
in animals triggered by bombardment with energy at power levels and frequencies
typical of cell phones.
- W. Ross Adey of the University of California, Riverside,
for instance, showed that a pregnant rat's exposure to phone-like radiation
at any of three power levels alters the activity of an enzyme -- ornithine
decarboxylase -- in the fetuses' brains. This enzyme helps create polyamines,
which are chemical markers of stress. Surprisingly, Adey noted, the lowest
input of RF energy, 0.16 watts per kilogram of tissue, triggered the biggest
changes in polyamine concentration.
- He speculates that increased enzyme activity, which can
foster certain cancers, "may offer an explanation" of tumors
that he and his colleagues have observed in rats exposed to RF energy for
- While concern over possible cancer risks has dominated
public debate of cell-phone safety, until now there have been too few long-term
users of the technology to make epidemiological studies practical, notes
Feychting. She adds that by pooling data from many countries, however,
detecting risks for several types of cancers should now be possible. This
summer, a 13-country study of brain and other head-and-neck cancers in
cell-phone users will begin under the aegis of the International Agency
for Research on Cancer in Lyon, France.
- Allen H. Frey, a Washington, D.C.- area consultant who
has conducted cell-phone studies, hopes neurological effects won't be ignored
in a rush to study cancer. Headaches, nausea, and reports of warming "could
be merely the most obvious symptoms that something else is going on,"
he says. "There are some real indications of a hazard here."
- Copyright © 2000 Science Service. All rights reserved.
- Cell Phones Suspected In Heart And Kidney Damage
- By Sarah Harris - The Daily Mail - London 12-13-99
- MOBILE phones were at the centre of a new health scare
last night after claims they can seriously damage the heart and kidneys.
Earlier reports have already linked their use to brain tumours, headaches
and premature aging.
- Now scientists say exposure to the phones low-level radiation
causes red blood cells to leak haemogoblin. The build up of haemogoblin,
which carries oxygen around the body, can lead to heart disease and kidney
- The findings will heighten alarm over the safety of mobile
phones which are used by more than 13 million people in Britain. In the
latest research, scientists exposed samples of blood to varying degrees
of microwave radiation for periods of between 10 and 60 hours. Even at
levels lower than those emitted by mobile phones, the cells leaked haemogoblin.
- Professor Edward Tuddenham, a haematologist at the Imperial
College Medical School based in Hammersmith Hospital, West London, said
the findings were worrying and he wanted to see the study followed up.
"The accumulation of haemogoblin in the body could result in heart
disease or kidney stones," he warned.
- The Department of Health said yesterday that the new
study -- carried out at the European Research Institute for Electronic
Components in Bucharest -- would be examined by a Government-appointed
committee due to report on phone safety next year.
- However, the Cambridge based consumer group Powerwatch
said with evidence of the risks growing the Government needed to do more.
- "We are still very much investigating the biological
consequences of mobile phones. But there certainly seems to be enough laboratory
studies now saying there are effects, to be very concerned," said
- Last month, scientists at Sweden Lund University found
that two minutes of exposure to emissions from mobile phones can disable
a safety barrier in the blood causing proteins and toxins to leak into
the brain. This can cause the chances of developing diseases such as Alzeimer's,
multiple sclerosis and Parkinson's.
- Symptoms reported by mobile phone users include fatigue,
dizzy spells and memory loss. Nearly two in three complain of regularly
getting headaches from using their phone, although this may be because
of bad posture rather than radiation emissions.
- Researchers at the University of Surrey say bad posture,
particularly holding the phone between the shoulder and cheek to leave
the hands free, can cause strain injury and spinal damage.
- The Federation of the Electronics Industry yesterday
repeated its claim that there was no conclusive proof that the phones were
a health hazard.
- A spokesman said mobiles operated within strict guidelines
on radiation emissions. "The consensus of scientific opinion is that
there is no consistent evidence that mobile phones operating within these
guidelines have any adverse health effects," he said.
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