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500 uW/m2 verhoogt stress in lichaam meetbaar

21.04.2007

In Salzburg is een provocatieonderzoek gedaan vergelijkbaar met het TNO Cofam en ''het Zwitserse onderzoek''. Mensen werden kortstondig blootgesteld aan hoogfrequente elektromagnetische straling. Naast de invloed op het subjectieve welbevinden zijn ook monsters genomen (spuug). Er deden 57 proefpersonen mee en er was sprake van een gerandomiseerde en dubbelblinde opzet, wat placebo-effecten nagenoeg uitsluit.

Bij relatief lage vermogensdichtheden (500 uW/m2) werden al duidelijke biologische effecten gevonden. (n.b. de blootstellingslimiet in Nederland is 10.000.000 uW/m2)

Het lichaamseigen afweersysteem werd daadwerkelijk verzwakt. Biochemisch werd uit de speekselanalyse duidelijk dat hogere blootstellingen tot een relevante immuniteitsonderdrukking leidden. Zo was er een statistisch significante verandering in de cortisolspiegel (ook wel het stresshormoon genoemd. Daarnaast waren er opvallende veranderingen in het verloop van de alfa-amylase-spiegel (amylase is zetmeelverteringsenzym), wat tevens als een sterke stress-marker aan te merken is. Hetzelfde gold voor de immunoglobulin-A-spiegel (antilichamen in het speeksel).

Op het gebied van welbevinden werden geen statistisch significante effecten gemeten. Dit was te verwachten aangezien de opzet erg onhandig is om dit soort effecten te kunnen vinden. Zo was de blootstellingstermijn te kort en werd er wel wat rekening gehouden met voorbelasting, maar lang niet voldoende.

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A Population-Based Prospective Cohort Study of Personal Exposure to Magnetic Fields during Pregnancy

19.02.2006

De-Kun Li, Roxana Odouli, Soora Wi, Teresa Janevic, Ira Golditch, T. Dan Bracken, Russell Senior, Richard Rankin, and Richard Iriye

Abstract:
To study the effect of magnetic fields on the risk of miscarriage, we conducted a population-based prospective cohort study among pregnant women within a large health maintenance organization. All women with a positive pregnancy test at less than 10 weeks of gestation and residing in the San Francisco area were contacted for participation in the study.
We conducted in-person interviews to obtain information on risk factors for miscarriage and other potential confounders. All participants were also asked to wear a magnetic fieldmeasuring meter for 24 hours and to keep a diary of their activities. Pregnancy outcomes were obtained for all participants by searching the health maintenance organization’s databases, reviewing medical charts, and telephone follow-up. We used the Cox proportional hazard model for examining the magnetic field-miscarriage association. A total of 969 subjects were included in the final analyses. Although we did not observe an association between miscarriage risk and the average magnetic field level, miscarriage risk increased with an increasing level of maximum magnetic field exposure with a threshold around 16 milligauss (mG). The rate ratio (RR) associated with magnetic field exposure  16 mG (vs  16 mG) was 1.8 [95% confidence interval (CI)   1.2–2.7]. The risk remained elevated for levels (in tertiles) of maximum magnetic field exposure  16 mG. The association was stronger for early miscarriages ( 10 weeks of gestation) (RR   2.2, 95% CI   1.2– 4.0) and among “susceptible” women with multiple prior fetal losses or subfertility (RR   3.1, 95% CI   1.3–7.7). After excluding women who indicated that their daily activity pattern during the measurements did not represent their typical daily activity during pregnancy, the association was strengthened; RR   2.9 (95% CI   1.6 –5.3) for maximum magnetic field exposure  16 mG, RR   5.7 (95% CI   2.1–15.7) for early miscarriage, and RR   4.0 (95% CI   1.4 –11.5) among the susceptible women. Our findings provide strong prospective evidence that prenatal maximum magnetic field exposure above a certain level (possibly around 16 mG) may be associated with miscarriage risk. This observed association is unlikely to be due to uncontrolled biases or unmeasured confounders. (EPIDEMIOLOGY 2002;13:9–20)

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A Review Of The Potential Health Risk Of Radiofrequency Fields From Wireless ...

07.07.2006

A Review Of The Potential Health Risk Of Radiofrequency Fields From Wireless Telecommunication Devices

 

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Acute mobile phone operation affects neural function in humans

19.02.2006

Clin Neurophysiol. 2002 Oct;113(10):1623-32 

Croft RJ, Chandler JS, Burgess AP, Barry RJ, Williams JD, Clarke AR.

OBJECTIVES
Mobile phones (MP) are used extensively and yet little is known about the effects they may have on human physiology. There have been conflicting reports regarding the relation between MP use and the electroencephalogram (EEG). The present study suggests that this conflict may be due to methodological differences such as exposure durations, and tests whether exposure to an active MP affects EEG as a function of time.

CONCLUSIONS
Active MPs affect neural function in humans and do so as a function of exposure duration. The temporal nature of this effect may contribute to the lack of consistent results reported in the literature.

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Arguments of applying the Precautionary Principle to counter Effects of Mobile Phone Base Stations

19.02.2006

ARGUMENTS IN FAVOR OF APPLYING THE PRECAUTIONARY PRINCIPLE TO COUNTER THE EFFECTS OF MOBILE PHONE BASE STATIONS

PARLIAMENTARY OFFICE FOR EVALUATION OF SCIENTIFIC AND TECHNOLOGICAL ALTERNATIVES
Hearing of 6 March 2002 at the request of Senators Jean-Louis LORRAIN and Daniel RAOUL

By
Roger SANTINI
Doctor of Science
Lecturer

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