Wetenschappelijk nieuws

Blootstelling bij vele experimenten onrealistisch laag - lokale SAR-waarden in weefsel veel hoger dan theoretisch aangenomen tot nu toe

 

Blogpost van Prof.  Dariusz Leszczynski die uitlegt dat de blootstelling bij vele experimenten tot nu toe onrealistisch laag was onder druk van industriewetenschappers (o.a. Nokia), te laag om effecten te vinden. Men kreeg pas financiering voor studies wanneer de blootstelling onrealistisch laag was (minder dan 2,0 SAR). De lokale blootstelling (SAR-waarden) in weefsels bij een reële (real life) blootstelling aan gsm-straling blijkt echter veel hoger dan theoretisch aangenomen tot nu toe.

 

"The general trend of exposing cells at 2.0 SAR was strongly advocated and propagated by the scientists from the telecom industry. It was a normal occurrence at the scientific meetings that whenever scientist reported biological effects at SAR over 2.0, the above mentioned industry scientists jumped up to the microphone to condemn and to discredit the results. The argument was always the same – safety standards are set at 2.0 and examining effects above it is futile. Furthermore, any study with SAR above 2.0 was suggested to be caused by thermal effect. It meant, according to these industry scientists that the obtained biological data were irrelevant.

 

» lees verder

Exposure to 900MHz electromagnetic fields activates the mkp-1/ERK pathway and causes blood-brain barrier damage and cognitive impairment in rats

 

PubMed - Brain Res. 2015 Jan

 

Abstract - With the rapid increase in the number of mobile phone users, the potential adverse effects of the electromagnetic field radiation emitted by a mobile phone has become a serious concern. This study demonstrated, for the first time, the blood-brain barrier and cognitive changes in rats exposed to 900MHz electromagnetic field (EMF) and aims to elucidate the potential molecular pathway underlying these changes. (...) We found that the frequency of crossing platforms and the percentage of time spent in the target quadrant were lower in rats exposed to EMF for 28 days than in rats exposed to EMF for 14 days and unexposed rats. Moreover, 28 days of EMF exposure induced cellular edema and neuronal cell organelle degeneration in the rat. In addition, damaged BBB permeability, which resulted in albumin and HO-1 extravasation were observed in the hippocampus and cortex. Thus, for the first time, we found that EMF exposure for 28 days induced the expression of mkp-1, resulting in ERK dephosphorylation. Taken together, these results demonstrated that exposure to 900MHz EMF radiation for 28 days can significantly impair spatial memory and damage BBB permeability in rat by activating the mkp-1/ERK pathway.

 

 

» lees verder

Self-Reporting of Symptom Development From Exposure to Radiofrequency Fields of Wireless Smart Meters in Victoria, Australia

 

PubMed - In 2006, the government in the state of Victoria, Australia, mandated the rollout of smart meters in Victoria, which effectively removed a whole population's ability to avoid exposure to human-made high-frequency nonionizing radiation. This issue appears to constitute an unprecedented public health challenge for Victoria. By August 2013, 142 people had reported adverse health effects from wireless smart meters by submitting information on an Australian public Web site using its health and legal registers.

 

Results - The most frequently reported symptoms from exposure to smart meters were (1) insomnia, (2) headaches, (3) tinnitus, (4) fatigue, (5) cognitive disturbances, (6) dysesthesias (abnormal sensation), and (7) dizziness. The effects of these symptoms on people's lives were significant.

 

Conclusions - Review of some key studies, both recent and old (1971), reveals that the participants' symptoms were the same as those reported by people exposed to radiofrequency fields emitted by devices other than smart meters. Interestingly, the vast majority of Victorian cases did not state that they had been sufferers of electromagnetic hypersensitivity syndrome (EHS) prior to exposure to the wireless meters, which points to the possibility that smart meters may have unique characteristics that lower people's threshold for symptom development.

 

 

» lees verder

'Personal exposure meters' onderschatten de werkelijke blootstelling

 

Personal exposure meters underestimate the exposure of humans to non-ionizing radiation in indoor environments.

de Miguel-Bilbao et al. Assessment of human body influence on exposure measurements of electric field in indoor enclosures. Bioelectromagnetics. 2014 Nov 14. (PubMed)

Personal exposure meters (PEMs) used for measuring exposure to electromagnetic fields (EMF) are typically used in epidemiological studies. As is well known, these measurement devices cause a perturbation of real EMF exposure levels due to the presence of the human body in the immediate proximity. This paper aims to model the alteration caused by the body shadow effect (BSE) in motion conditions and in indoor enclosures at the Wi-Fi frequency of 2.4 GHz.

It has been found that the influence of the presence of the human body can be characterized as an angle of shadow that depends on the dimensions of the indoor enclosure.

 

» lees verder

Low intensity radiofrequency radiation: a new oxidant for living cells

 

ScopeMed (Open Access)

 

Extract: "A number of experimental studies demonstrate metabolic effects induced by low intensity RFR  [15-17]. Notwithstanding the non-ionizing nature of RFR, profound mutagenic effects and features of significant oxidative stress in living cells under low  intensity RFR exposure were detected using various biological models [18, 19]. Some of the papers however still show an absence of biological effects [20]. To clarify the picture, we analyzed peer-reviewed publications on oxidative effects of RFR and found altogether 80 currently available papers, of which a remarkable part, 76 papers (92.5%), reported the detection of significant oxidative stress..."

 

"Whatever the particular first-step molecular mechanisms, it is clear that the substantial overproduction of ROS in living cells under low intensity RFR exposure could cause a broad spectrum of health disorders and diseases, including cancer in
humans. Undoubtedly, this calls for the further intensive research in the area, as well as to a precautionary approach in routine usage of wireless devices."

 

» lees verder

Voltage-gated calcium channels: replace ICNIRP’s “fictional” heating limits

 

Professor Pall’s important 2013 review (J Cell Mol Med.), showing one mechanism by which EM exposure affects cells, is on the list of Global Medical Discoveries of 2nd March. Pall’s new paper advocates improving microwave exposure limits in two ways: (a) reduce exposure levels by 100 to 1,000 times immediately; (b) introduce biologically-based safety tests. Over 20,000 studies show EM effects below current heating-based safety limits. Fictional heating limits are no longer relevant.

 

Bron: ES-UK Newsletter November 2014

 

» lees verder