Re: Food Irradiationn Question

["H. G Claycamp" <hgc2+@pitt.edu>]

THere are very few radical species that could remain trapped for an
extended period of time unless wheat has bones or teeth!!

I don't think its that useful to fit a hypothesis to a study that has been
refuted on the basis of experimental flaws, etc.  But, what the heck, this
is "un-peer reviewed" e-mail...
	
The serious question that you might ask is: "How would radicals survive
the extreme (pH 1-1.5) conditions of digestion in order to be taken up and
distributed to tissues?"  Not likely.  In fact, even the most stable
radicals, such as the nitroxide radicals, have very short (minutes)
lifetimes in the body.  Nevertheless, when some nitroxyl free radicals,
such as TEMPOL are given to mice, they are protected from radiation
effects!  Long term feed studies improve lifespan and weight control in
the mice, also.


(hgc2+@pitt.edu)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
H. Gregg Claycamp, Ph.D., C.H.P. 
Assoc. Prof. and Assoc. Chair 
Dept. of Environmental and 
  Occupational Health 
University of Pittsburgh 
412-967-6524 FAX:  412-624-1020


On Wed, 4 Nov 1998, Michael Kay wrote:

> Possibly there is a recombination or destruction of free radicals formed during
> irradiation. Since there is always some water, and hydroxyl radicals are known to
> be formed, this seems to be reasonable. Does anybody have any data on the
> recombination times?
> 
> Michael A. Kay, ScD, CHMM
> makay@teleport.com
> 
> Sandy Perle wrote:
> 
> > > No effects were seen is the Wheat was stored for 12 weeks after irradiation.
> >
> > Shawn,
> >
> > Was there a hypothesis proposed as to why there was no
> > observable effect if the wheat were stored for at least 12 weeks
> > after irradiation? Not understanding the mechanism involved here, I
> > would think that any chemical or physiological changes within the
> > wheat would occur and would not be reversible, especially after the
> > wheat is already harvested. Any information, or thoughts regarding
> > this claim?
> >
> > Thanks,
> >
> > Sandy Perle
> > E-Mail: sandyfl@earthlink.net
> > Personal Website: http://www.geocities.com/capecanaveral/1205
> >
> > "The object of opening the mind, as of opening
> > the mouth, is to close it again on something solid"
> >               - G. K. Chesterton -
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