On Sun, 14 Sep 2003 20:34:49 -0400, r norman <rsn_ at _comcast.net>
wrote:
>On Sun, 14 Sep 2003 23:56:01 GMT, Charlie Wilkes
><charlie_wilkes at easynews.com> wrote:
>>>On Sun, 14 Sep 2003 11:48:01 -0700, "Bill Bonde, one of many Fair and
>>Balanced Conservatives, AKA Spike, currently brunching on extra juicy
>>ortolans, where do you put the beaks again?" <stderr2 at backpacker.com>
>>wrote:
>>>>>>Charlie Wilkes wrote:
>>>>>>>> On Sun, 14 Sep 2003 05:59:54 GMT, "torresD" <torresD30 at hotmail.com>
>>>> wrote:
>>>> >
>>>> >The study - which warns specifically against
>>>> > "the intense use of mobile phones by youngsters" -
>>>> >comes as research on their health effects is
>>>> > being scaled down, due to industry pressure.
>>>> >
>>>> >http://news.independent.co.uk/world/science_medical/story.jsp?story=443248>>>> >Mobiles 'make you senile'
>>>> >By Geoffrey Lean, Environment Editor.
>>>> >14 September 2003
>>>> >
>>>> >Mobile phones and the new wireless technology
>>>> >could cause a "whole generation" of today's
>>>> >teenagers to go senile in the prime of their lives,
>>>> >
>>>> This is pernicious cargo-cult science!
>>>>>>>Da plane! Da plane! Where the hell is the plane! We built a coconut
>>>radio.
>>>>This is no joke, Bonde. Esteemed scientists such as Matthew Kirkaldie
>>and r. norman have tried the evidence and found it wanting.
>>>>Charlie
>>The work referred to is:
>>Nerve cell damage in mammalian brain after exposure to microwaves from
>GSM mobile phones.
>Salford LG, Brun AE, Eberhardt JL, Malmgren L, Persson BR.
>Environ Health Perspect. 2003 Jun;111(7):881-3; discussion A408
>>The possible risks of radio-frequency electromagnetic fields for the
>human body is a growing concern for our society. We have previously
>shown that weak pulsed microwaves give rise to a significant leakage
>of albumin through the blood-brain barrier. In this study we
>investigated whether a pathologic leakage across the blood-brain
>barrier might be combined with damage to the neurons. Three groups
>each of eight rats were exposed for 2 hr to Global System for Mobile
>Communications (GSM) mobile phone electromagnetic fields of different
>strengths. We found highly significant (p< 0.002) evidence for
>neuronal damage in the cortex, hippocampus, and basal ganglia in the
>brains of exposed rats.
>>This seems to disagree with previous work:
>>Effect of global system for mobile communication (GSM) microwave
>exposure on blood-brain barrier permeability in rat.
>Fritze K, Sommer C, Schmitz B, Mies G, Hossmann KA, Kiessling M,
>Wiessner C.
>Acta Neuropathol (Berl). 1997 Nov;94(5):465-70.
>>We investigated the effects of global system for mobile communication
>(GSM) microwave exposure on the permeability of the blood-brain
>barrier using a calibrated microwave exposure system in the 900 MHz
>band. Rats were restrained in a carousel of circularly arranged
>plastic tubes and sham-exposed or microwave irradiated for a duration
>of 4 h at specific brain absorption rates (SAR) ranging from 0.3 to
>7.5 W/kg. The extravasation of proteins was assessed either at the end
>of exposure or 7 days later in three to five coronal brain slices by
>immunohistochemical staining of serum albumin. As a positive control
>two rats were subjected to cold injury. In the brains of freely moving
>control rats (n = 20) only one spot of extravasated serum albumin
>could be detected in one animal. In the sham-exposed control group (n
>= 20) three animals exhibited a total of 4 extravasations. In animals
>irradiated for 4 h at SAR of 0.3, 1.5 and 7.5 W/kg (n = 20 in each
>group) five out of the ten animals of each group killed at the end of
>the exposure showed 7, 6 and 14 extravasations, respectively. In the
>ten animals of each group killed 7 days after exposure, the total
>number of extravasations was 2, 0 and 1, respectively. The increase in
>serum albumin extravasations after microwave exposure reached
>significance only in the group exposed to the highest SAR of 7.5 W/kg
>but not at the lower intensities. Histological injury was not observed
>in any of the examined brains. Compared to other pathological
>conditions with increased blood-brain barrier permeability such as
>cold injury, the here observed serum albumin extravasations are very
>modest and, moreover, reversible. Microwave exposure in the frequency
>and intensity range of mobile telephony is unlikely to produce
>pathologically significant changes of the blood-brain barrier
>permeability.
>Excellent. Thank you, r. norman, for clarifying the status of current
research.
Charlie
