reply to post by phishyblankwaters
Doesn't non ionizing radiation destroy the covalent bonds?.
"Most of the studies mentioned above concluded that the microwave effect, if it existed, was indistinguishable from the effects of external heating.
However, it was recently demonstrated (Kakita 1995) that the microwave effect is distinguishable from external heating by the fact that it is capable
of extensively fragmenting viral DNA, something that heating to the same temperature did not accomplish. This experiment consisted of irradiating a
bacteriophage PL-1 culture at 2450 MHz and comparing this with a separate culture heated to the same temperature. The DNA was mostly destroyed, a
result that does not occur from heating alone. These photos are borrowed from Kakita et al (1995), permission pending".
"In the Kakita experiment the survival percentage was approximately the same whether the samples were heated or irradiated with microwaves, but
evaluation by electrophoresis and electron microscopy showed that the DNA of the microwaved samples had mostly disappeared. In spite of the evolving
complexity of all the previous experiments, electrophoresis had not been used to compare irradiated and externally heated samples prior to this.
Electron microscopy had been used to study the bacteriocidal effects of microwaves (Rosaspina 1993, 1994) and these results also showed that
microwaves had effects that were distinguishable from those of external heating".
"The energy level of a microwave photon is only 10-5 eV, whereas the energy required to break a covalent bond is 10 eV, or a million times greater.
Based on this fact, it has been stated in the literature that "microwaves are incapable of breaking the covalent bonds of DNA" (Fujikawa 1992, Jeng
1987), but this has apparently occurred in the Kakita experiment, even though this may be only an indirect effect of the microwaves".
"There is, in fact, plenty of evidence to indicate that there are alternate mechanisms for causing DNA covalent bond breakage without invoking the
energy levels of ionizing radiation (Watanabe 1985, 1989, Ishibashi 1982, Kakita 1995, Kashige 1995, Kashige 1990, 1994). Still, no theory currently
exists to explain the phenomenon of DNA fragmentation by microwaves although research is ongoing which may elucidate the mechanism (Watanabe 1996)".
"The results of microwave irradiation affected two bacteria, S. aureus and E. coli. The death curves exhibited classic exponential decay with ab
appararent shoulder, as well as a possible second stage. These curves are based on data from Kakita etal (1999)".
"The microwave frequency used in the Kakita study was the standard 2450 MHz used in conventional microwave ovens. This is the same frequency that was
used in essentially all prior studies, except for the earliest studies (which looked at lower frequencies), and sonic resonant studies, which looked
at much higher frequencies. The early studies showed that DNA tended to absorb microwave radiation "in the kilocycle range" (Takashima 1963, 1966,
Grant 1978, Grandolfo 1983), but no biocidal effects in the range of 1 MHz to 60 MHz were observed".
So it is possible for non ionising radiation to cause damage to DNA, possibly a two stage effect as mentioned later in the article.
"In summary, it would seem there is reason to believe that the microwave effect does indeed exist, even if it cannot yet be adequately explained. What
we know at present is somewhat limited, but there may be enough information already available to form a viable hypothesis. The possibility that
electromagnetic radiation in the non-ionizing frequency range can cause genetic damage may have profound implications on the current controversy
involving EM antennae, power lines, and cell phones".
"A Theory of Microwave Induced DNA Covalent Bond Breakage A review of the data from the various referenced experiments shows a common pattern -- for
the first few minutes of irradiation there is no pronounced effect, and then a cascade of microbial destruction occurs. The data pattern greatly
resembles the dynamics of a capacitor; first there is an accumulation of energy, and then a catastrophic release. It may simply indicate a threshhold
temperature has been reached, or it may indicate a two-stage process is at work".
The second stage of this process may very well be the accumulation of oxygen radicals, which would certainly seem to be primary suspects as they have
a considerable propensity for dissociating the covalent bonds of DNA. Oxygen radicals can be generated by the disruption of a hydrogen bond on a water
molecule. Water molecules exist alongside DNA molecules as "bound" water, two or three layers thick. These water molecules share a hydrogen bond with
component atoms of the DNA backbone, including carbon, nitrogen and other oxygen atoms. At any given point in time one of the hydrogen atoms may be
primarilly bonded to either an oxygen atom on the water molecule, or to an oxygen (or other) atom on the DNA backbone.
Non ionising radiation damage to DNA
edit on 13-9-2011 by
The X because: (no reason given)
link to RFsafe?
edit on 13-9-2011 by The X because: (no reason given)