Cerebrovascular permeability to 86Rb in the rat after exposure to pulsed

[norml]

1: Bioelectromagnetics. 1984;5(3):323-30. Related Articles, Links


Cerebrovascular permeability to 86Rb in the rat after exposure to pulsed microwaves.

Goldman H, Lin JC, Murphy S, Lin MF.

Microwaves (pulsed, 2,450 MHz) at an average power density of 3 W/cm2 were applied directly to the head for 5, 10, or 20 min, producing a peak specific absorption rate of 240 W/kg in the brain, which, after a 10-min exposure, resulted in brain temperatures in excess of 43 degrees C. A bolus of 86Rb in isotonic saline was injected intravenously and an arterial sample was collected for 20 s to determine cardiac output. Compared with unexposed controls, uptake of 86Rb increased most in those regions directly in the path of the irradiation, namely, the occipital and parietal cortex, as well as the dorsal hippocampus, midbrain, and basal ganglia. In a separate group of animals, regional brain-vascular spaces were found to increase with brain temperature. These results support previous observations indicating that reliably demonstrable increases of blood-brain barrier permeability are associated with intense, microwave-induced hyperthermia, and that the observed changes are not due to field-specific interaction.

PMID: 6487383

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snip


http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6487383&dopt=Abstract

[GreenPartyVoter]

1. In English? They cooked a rat in a microwave? Why?!

[smbolisnch]

2. Poor animal.

:cry:

[bicentennial_baby]

3. so if we get microwaved...

our b/b barrier becomes more permeable? :shrug:

[norml]

7. Are Cell Phones Carcinogenic? (Part Two)

Are Cell Phones Carcinogenic? (Part Two)

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By Robert Egwele
The Epoch Times
Jul 11, 2005


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Several studies indicate that there may be physiological effects from exposure to the type pf radiation emitted by cell phones. (Photos.com)(Photos.com)



In 1995, Henry Lai and N.P. Singh published a study demonstrating how cell phones damaged DNA in the brain cells of lab rats. While Lai stated that the study provided no solid answers, he did state that more studies needed to be done. Immediately after the study was published, the cell phone industry criticized Lai’s research techniques and stated that the results were never duplicated.
About a year later in Australia, Dr. Michael Repacholi turned up similar results. His study looked at 200 mice, half of them exposed to digital phone radiation and half of them not. Dr. Repacholi found that cancer rates doubled in those mice that had been irradiated. The exposed mice were subjected to pulsed microwaves at a power density similar to a digital cell phone transmitting for two 30-minute periods each day.

Significantly, a study done by the Radiation and Nuclear Safety Authority in Finland found that exposing human cells to an hour of cell phone radiation triggers a response, that normally occurs when cells are being damaged.

The report’s conclusion warns: “The possible RF radiation-induced breakage of the blood-brain barrier, if occurring repeatedly over a long period of time, might become a health hazard because of the possible extra-capillary accumulation of molecules that might cause tissue damage.” Many considered this study in itself a landmark in cell phone research, because it proved that biochemical changes, which were only observed in lab animals previously, can occur in the cells of cell phone users.


snip


http://www.theepochtimes.com/news/5-7-11/30200.html

[norml]

14. Are Cell Phones Carcinogenic? Part One

Are Cell Phones Carcinogenic? Part One

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By Robert Egwele
The Epoch Times
Jul 04, 2005


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UNSEEN DANGER: Studies demonstrate potential risk of cell phones.
Photos.com
High-resolution image (1596 x 2400 pixels, 300 dpi)



Cellular phones have become an essential part of our lives today. Most people can’t live without these devices and really can’t remember what life was like before their creation. Everyone is encouraged to have one of these devices, even our children. Cell phone towers are being erected right and left with little or no objection from the public.
Most people assume that because cell phones are in general use, they must be safe. Any independent research showing the potential dangers is quickly discredited. Are there reasons to be concerned?

In August 2000, Dr. Christopher Neuman, a neurologist, filed a suit alleging that his prolonged cell phone use was responsible for the brain tumor that was slowly killing him. He accused the cell phone industry of knowing that these gadgets were unsafe and deliberately misleading the public into thinking that cell phones are harmless. Neuman demanded $800 million from seven cell phone manufacturers and cellular service providers. The malignant tumor in question was discovered in March 1998 behind Neuman’s right ear, the same ear that he used when on his cell phone. He claimed that he used a wireless phone several times daily between ’92 and ’98.

This case became a catalyst responsible for general mistrust of cellular technology. Several similar cases have been brought to the courts, but like Neuman’s, were defeated. Of course, many studies were done to show the public that what happened to Neuman and others were anomalies, and that there was no correlation between cell phone use and cancer of any kind. In an effort to combat the cellular backlash, the Food and Drug Administration (FDA) stated that there was no evidence that radiation from cell phones posed a health risk. However, the FDA also concluded that there was no proof that cell phones are risk free, either. The above position and a few studies portraying cell phones in a positive light were all that was needed to quickly diffuse public tension, and the Neuman case was ultimately forgotten.

Some studies have been done before and after the Neuman case showing that cell phones emit a radio frequency (RF) that may be harmful to frequent users. The RF that cell phones emit is very similar to those in microwave ovens. Microwave (MW) energy oscillates at millions of cycles per second. The Journal of Cellular Biochemistry states that these frequencies cause cancer and other ailments by interfering with cellular DNA. Between 20 and 80 percent of the RF given off by cell phones is absorbed into the user’s head. The amount of RF absorbed depends on how close the antenna is to the user, the duration of time the user is exposed to the RF and the power level of the cell phone. The longer one is exposed to RF, the better chance one has of becoming ill. How many people are aware of this information? Not many, because findings of this nature are all but ignored by the mainstream media.


snip


http://theepochtimes.com/news/5-7-4/30022.html

[liss681]

4. YUCK

I was not prepared for the big rat staring me in the face! I hate rats. :scared:

[smbolisnch]

6. Look at his face!

What's not to love? :shrug:

[liss681]

9. It's kind of stupid of me to be scared of rats

since I own two guinea pigs... but they don't have those long, gross tails!

[smbolisnch]

10. They are really very affectionate, smart animals!

The tail is no big deal, really!
Welcome to DU! :hi:

[liss681]

11. thanks

the fact that they are smart does not make me feel any better! :cry:

[smbolisnch]

12. Well, I guess you will just have to meet one someday!

They are very cool!
:hi:

[evlbstrd]

5. Related to cel phone usage?

Maybe I should read the article, but that's my guess.

[evlbstrd]

8. One of the related articles: I was right!

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.

Department of Experimental Neurology, Max-Planck-Institute for Neurological Research, Cologne, Germany.

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.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=9386779&query_hl=2

[Catchawave]

13. The study's 19 years old....

:shrug:

edit: math !

[norml]

15. See post 8 for a newer study.

There are lots of studies that have been done on this.

The effects and uses of pulsed microwave technology is a favorite topic that I come back to from time to time.

No, I don't want to use a cell phone.