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From: "yosefh" <[EMAIL PROTECTED]>
Here is what I found from my research on the net. Realize, there is more to
find.
http://www.whatreallyhappened.com/archives/cat_sciencehealth.html
Got Pizza Hut? Got Silicone! posted Feb. 21, 2006 Silicon is not an
approved substance for human consumption. Neither is Polydimethylsiloxane,
or formaldehyde which results as a byproduct when frozen silicone-sprayed
pizza is subjected to heat. Polydimethylsiloxane breaks down into
formaldehyde when subjected to heat in excess of 150 degrees centigrade. I
don't think silicon itself is a cause for concern as it is fairly inert,
but the formaldehyde is an issue for people who are sensitive to it.
Formaldehyde's toxic effects are still largely unknown to the general
public. - M. R.
http://www.medscape.com/medline/abstract/1284519?prt=true
Role of toxic ingredients in silicone oils in the induction of increased
corneal endothelial permeability. Lens Eye Toxic Res. 1992; 9(3-4):377-84
(ISSN: 1042-6922) Green K ; Cheeks L ; Stewart DA ; Trask D Department of
Ophthalmology, Medical College of Georgia, Augusta 30912-3400.
Silicone oils may induce pathological changes in corneas or retinas by
unknown mechanisms but the effects are probably related to certain
specific components. Low molecular weight compounds have been implicated
in the induction of toxic tissue reactions. Several of these components,
that occur as contaminants or by-products in crude silicone oils, were
tested for their ability to alter corneal endothelial permeability. In
vitro inulin/dextran permeability was measured after one week of in vivo
exposure to a non-toxic oil to which various low molecular weight
components were added. At least 75% of the anterior chamber volume was
replaced with oil +/- additives. A long-chain silanol-terminated
polydimethylsiloxane (1000 cps) at 2 mg/ml, tetramethyl-ammonium
siloxanolate (a catalyst) at 1 mg/ml and a mixture of a series of linear
compounds (MM through MD10M) each at 10 mg/ml all caused a large corneal
endothelial permeability increase. A mixture of two short-chain
silanol-terminated compounds was less damaging, as was a mixture of a
cyclic series. Evidently certain compounds can induce toxic effects on the
corneal endothelium whereas other compounds are much less toxic. The
linear series and the catalyst, that induce corneal endothelial changes,
have been shown to occur in silicone oils.
a.. PreMedline Identifier: 1284519
http://www.themilkweed.com/Feature_06_Jan.pdf
#search='Pizza%20Hut%20uses%20chemicals'
Engergy Citations Database Polymethylsiloxane:
http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=6899286
polydimethylsiloxane:
http://en.wikipedia.org/wiki/Polydimethylsiloxane
http://www.wyatt.com/literature/silicone.pdf#search='polydimethylsiloxane'
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